3Com® Corporation
PathBuilder™ S24x, 26x, and 27x Switch
Installation Manual
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Notice (continued)
Proprietary Material
Information and software in this document are proprietary to 3Com (or its Suppliers) and
without the express prior permission of an officer of 3Com, may not be copied, reproduced,
disclosed to others, published, or used, in whole or in part, for any purpose other than that for
which it is being made available. Use of software described in this document is subject to the
terms and conditions of the 3Com Software License Agreement.
This document is for information purposes only and is subject to change without notice.
Part No. T0004, Rev. F
First Printing October 1998
Manual is current for Release 5.2M.
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Contents
Chapter 1. About the PathBuilder S24x, 26x, and 27x switch
Applications ..................................................................................................
Features and Protocols ..................................................................................
Hardware Components .................................................................................
Enclosure ..................................................................................................
Motherboard .............................................................................................
Back Panel ................................................................................................
TI Dual Port Digital PBX Interface Card .................................................
E1 Dual Port Digital PBX Interface Card ................................................
DSPM/SM Card .......................................................................................
DSPM Card with Analog E&M Interface ................................................
Setting Jumpers for DSPM Card with Analog E&M Interface ................
DSPM Card with FXS Analog Interface ..................................................
DSPM Host Card with FXO Analog Interface ........................................
-48V Ringer/Power Supply Card and Enclosure .....................................
10BaseT Transceiver ................................................................................
Radio Frequency Interference Regulations ..................................................
Telecommunications Regulations .................................................................
FCC and Telephone Company Procedures and Requirements .....................
FCC Information ..........................................................................................
1-3
1-7
1-8
1-11
1-12
1-16
1-17
1-20
1-23
1-26
1-29
1-32
1-35
1-38
1-41
1-42
1-43
1-45
1-46
Chapter 2. Preparation and Unpacking
Before Installing Your PathBuilder S24x, 26x, and 27x Switch ..................
Unpacking .....................................................................................................
The PathBuilder S24x, 26x, and 27x Switch Rackmount Kit ......................
Installing the PathBuilder S24x, 26x, and 27x Switch in an Equipment Rack
2-2
2-4
2-5
2-8
Chapter 3. PathBuilder S24x, 26x, and 27x Switch Hardware Installation
Setting DIP Switches ....................................................................................
Installing the DSU DIM ...............................................................................
Configuring the PathBuilder S24x, 26x, and 27x Switch for DSU Operation
DSU Input and Output Signaling .................................................................
Troubleshooting DSU Installation ................................................................
Installing DIMs .............................................................................................
Installing SIMMs ..........................................................................................
Installing I/O Cards ......................................................................................
Installing a T1 or E1 Dual Port Digital PBX Interface Card ........................
Installing the T1/CSU Daughter Card ......................................................
Cabling the PathBuilder S24x, 26x, and 27x Switch ...................................
Installing the Transceiver .............................................................................
Power-Up Diagnostics/Verification ..............................................................
Installing Software Options ..........................................................................
Full Mesh Cluster Cabling ............................................................................
3-3
3-4
3-7
3-8
3-11
3-12
3-14
3-16
3-17
3-19
3-22
3-23
3-24
3-26
3-27
v
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Contents (continued)
Chapter 4. Maintenance
Removing/Replacing Top Cover ..................................................................
Removing/Replacing Front Panel Cover ......................................................
Removing/Replacing Power Supply .............................................................
Removing/Replacing PathBuilder S24x, 26x, and 27x Switch Cards ..........
Replacing PathBuilder S24x, 26x, and 27x Switch Motherboard ................
Removing/Replacing the Lithium Battery ....................................................
4-3
4-5
4-7
4-9
4-12
4-14
Chapter 5. Channelized Data
Application Example ....................................................................................
Configuring Channelized Data .....................................................................
Configuring T1 and E1 Physical Ports .....................................................
T1 Port Parameters ...................................................................................
E1 Port Parameters ...................................................................................
Configuring Virtual Ports on the PathBuilder S24x, 26x, and 27x Switch
Configuring Virtual Port Mapping Table .................................................
5-2
5-3
5-5
5-7
5-13
5-18
5-20
Appendix A. Cables
Ethernet Cable Pinouts .................................................................................
A-6
Appendix B. PathBuilder S24x, 26x, and 27x Switch Specifications
Appendix C. PathBuilder S24x, 26x, and 27x Switch Error Codes
Appendix D. Technical Support
Index
vi
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About This Manual
Overview
Introduction
This manual describes features, hardware, specifications, and applications for the
3Com PathBuilder S24x, 26x and 27x switch.
Audience
This manual is intended for operators of the 3Com PathBuilder S24x, 26x and 27x
switch.
How to Use This
Manual
The following table describes the contents of this manual.
This Chapter...
Chapter 1
Describes:
PathBuilder S24x, 26x and 27x switch hardware and
software features, and FCC and Telephone Company
procedures and requirements.
Chapter 2
Chapter 3
Setting up a PathBuilder S24x, 26x and 27x switch,
including site preparation, how to unpack the unit, and
installation procedures.
Installing the hardware on the PathBuilder S24x, 26x
and 27x switch, powerup and verification, and installa-
tion of software options.
Chapter 4
Chapter 5
Maintaining the PathBuilder S24x, 26x and 27x switch
including replacement of cards and motherboard.
Channelized Data option for the PathBuilder S24x, 26x
and 27x switch.
Appendix A
Appendix B
Appendix C
Appendix D
Cable pinouts for Ethernet.
Product specifications.
Error Codes
Technical Support
Special Notices
The following notices emphasize certain information in the manual. Each serves a
special purpose and is displayed in the format shown:
Caution
Caution provides you with information that, if not followed, can result in damage to
software, hardware, or data.
Mise en Garde
Une mise en garde vous fournit des informations qui, si elles ne sont pas observées,
peuvent se traduire par des dommages pour le logiciel, le matériel ou les données.
vii
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About This Manual (continued)
Vorsicht
Ein Vorsichtshinweis macht Sie darauf aufmerksam, daß Nichtbefolgung zu
Software-, Hardware- oder Datenschäden führen kann.
Warning
Warning is the most serious notice, indicating that you can be physically hurt.
Avertissement
Un avertissement constitue le message le plus sérieux, indiquant que vous pouvez
subir des blessures corporelles.
Warnung
Eine Warnung ist der ernsthafteste Hinweis auf Körperverletzungsgefahr.
Trademarks
PathBuilder is a trademark of 3Com Corporation.
viii
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Chapter 1
About the PathBuilder S24x, 26x, and 27x switch
Overview
What is the
The PathBuilder S24x, 26x, and 27x switch is a multi-protocol LAN/WAN
PathBuilder S24x, PathBuilder S200 series switch featuring a high-speed processor and coprocessor
26x, and 27x
switch?
coupled with 12 Mbytes of on-board memory (standard). Designed to address the
needs of large branch offices with higher throughput needs and regional
concentration sites, the PathBuilder S24x, 26x, and 27x switch is available in rack-
mount configurations.
The PathBuilder S24x, 26x, and 27x switch’s high performance capabilities are
uniquely matched to branch applications with high traffic requirements.
As a regional concentrator, the PathBuilder S24x, 26x, and 27x switch accepts traffic
from many branch locations into a single site and transfers the traffic to other devices
at the regional or central site.
The PathBuilder S24x, 26x, and 27x switch supports both Frame Relay and X.25.
About the PathBuilder S24x, 26x, and 27x switch
1-1
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Meshed Cluster
Application
Support
A unique feature of the PathBuilder S24x, 26x, and 27x switch is its ability to
support full meshed cluster applications. This functionality provides host site
resiliency, port count extension, and multiple LAN connectivity.
Examples of how the features of the PathBuilder S24x, 26x, and 27x switch function
in specific applications can be found the “Applications” section on page 1-3.
Figure 1-1 shows a PathBuilder S24x, 26x, and 27x switch.
®
Figure 1-1. PathBuilder S24x, 26x, and 27x Switch
1-2
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Applications
Applications
Introduction
This section briefly describes several application examples for the PathBuilder S24x,
26x, and 27x switch.
Performance
Branch Nodes
Because of its high performance capabilities, the PathBuilder S24x, 26x, and 27x
switch can be employed in a variety of branch node applications. For example, the
PathBuilder S24x, 26x, and 27x switch can support a mix of voice and data types,
traditional legacy (SDLC, X.25, Bisync, Async, etc.), and LAN. Because of its high
throughput, the PathBuilder S24x, 26x, and 27x switch can be used in situations
where large file transfers, fast response time, and high numbers of users are the
Furthermore, the PathBuilder S24x, 26x, and 27x switch is designed to meet the
needs of an expanding network. With its large RAM capacity and high-speed
processor, the PathBuilder S24x, 26x, and 27x switch can easily adapt to a growing
network with little or no additional hardware.
PB S200
SNA
Public
or Private
Network
Figure 1-2. Performance Branch Node Example
About the PathBuilder S24x, 26x, and 27x switch
1-3
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Applications
Regional
Concentrator
concentration function with the PathBuilder S24x, 26x, and 27x switch routing the
27x switch acts as the regional concentrators, receiving traffic from dozens and even
thousands of remote sites, and concentrating the traffic before forwarding it to the
correct location. In this case, the PathBuilder S24x, 26x, and 27x switch is the
regional site.
In both examples, the PathBuilder S24x, 26x, and 27x switch could be either a single
node or a group of nodes networked together as a cluster. The PathBuilder S24x, 26x,
and 27x switch’s cluster feature is described below.
Central Site
Branch 1
PB S200
PB S200
Frame Relay
or X.25
(Single Node or Cluster)
Branch XX
PB S200
PBX
Host
Figure 1-3. Regional Concentrator With Public Network Example
1-4
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Applications
Central Site
High-Speed Link
PB S200
Branch 1
PB S200
(Single Node or Cluster)
Branch XX
PB S200
PBX
Host
Figure 1-4. Regional Concentrator Example
Cluster Application An important new feature available with the PathBuilder S24x, 26x, and 27x switch
is its use in a cluster. This allows as many as four PathBuilder S24x, 26x, and 27x
switches to act a single unit for the purposes of connectivity. Though configured and
managed as individual nodes, when the PathBuilder S24x, 26x, and 27x switches are
clustered together, devices attached to access ports on one node can have calls routed
out the network port of one of the other nodes.
The three high-speed ports on the PathBuilder S24x, 26x, and 27x switch
motherboard provide networking channels between the nodes to pass traffic from
network ports to access ports. The PathBuilder S24x, 26x, and 27x switch cluster
allows for high port count and throughput primarily in support of the regional
concentrator applications.
can reach any host connection. If a PathBuilder S24x, 26x, and 27x switch node
within the cluster fails, only those links and host connections directly connected to
that node go down. Placement of host equipment, and use of redundant host
equipment can minimize the impact of any individual node failure. Furthermore,
Link Back Up features in the remotes can limit the degree of remote isolation if part
of the PathBuilder S24x, 26x, and 27x switch cluster fails.
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1-5
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Applications
16 Access Ports
16 Access Ports
16 Access Ports
16 Access Ports
PB S200
PB S200
PB S200
PB S200
High-Speed Network Links to other Sites
or Backbone LAN Connectors
Figure 1-5. PathBuilder S24x, 26x, and 27x Switch Cluster Example
1-6
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Features and Protocols
Features and Protocols
Description
For a complete listing of the features and protocols supported by your PathBuilder
S24x, 26x, and 27x switch, refer to the Software Release Notice that came with the
operating software.
About the PathBuilder S24x, 26x, and 27x switch
1-7
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Hardware Components
Hardware Components
PathBuilder S24x, The PathBuilder S24x, 26x, and 27x switch comes in a rack-mountable
26x, and 27x
configuration.
Switch Hardware
Configuration
The switch contains a motherboard/CPU board, a built-in power supply, and an ISA
bus for up to eight additional interface cards. The PathBuilder S24x, 26x, and 27x
switch has three available serial ports, an Ethernet port, and a CTP port, FLASH
memory, and battery-powered configuration backup. It is easily expanded by adding
option cards to the industry standard ISA bus.
Figure 1-6 shows a rack-mountable PathBuilder S24x, 26x, and 27x switch.
Status
LEDs
SSN
Label
Numeric
LED
POWER
STATUS
SERVICE
®
PathBuilder
S200 Series
RESET
Front View
Reset
Button
AUI Port 4
(Ethernet Routing)
Product ID
Label
Power
Supply
Optional -48V
Power Supply
Rear View
Serial/Network
I/O Ports 1, 2, 3, 6
115/230 VAC
Voltage
Expansion
Card Ports
Select
Slots 1 through 8
Switch
Figure 1-6. PathBuilder S24x, 26x, and 27x Switch
1-8
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Hardware Components
Hardware
Components
This table lists and briefly describes the hardware components that make up the
PathBuilder S24x, 26x, and 27x switch. More detailed descriptions of these
components follow.
Component
Enclosure
Description
A rack-mount unit that contains all the PathBuilder S24x,
26x, and 27x switch processor cards.
Back Panel
Contains power outlets, power switch, communication ports,
and slots for I/O cards.
Motherboard
Contains five data ports:
• Ports 1 and 2 are DIM ports
• Port 3 is a high-speed/V.36 DTE port
• Port 4 is the Ethernet AUI port
(see below for limitations)
• Port 6 is reserved for the control terminal port
Contains eight full-size expansion slots.
Integral DSU DIM An option used in installations requiring connection to a
DDS interface conforming to AT&T 62310 or
ANSI T1E1.4/91-006, and running at 56 kbps.
(Optional)
10Base2
Lets you accommodate different network configurations
TransceiverforAUI through the user-selectable Signal Quality Error (SQE)
ports (optional)
function.
T1 Dual Port
Digital PBX
Interface Card
The T1 dual port digital PBX interface card supports digital
voice communications, providing integrated network access.
The T1 digital interfaces are used for both voice and data
PathBuilder S24x, traffic.
26x, and 27x
E1 Dual Port
Digital PBX
Interface Card
The E1 dual port digital PBX interface card supports digital
voice communications, providing integrated network access
The E1 interface card is used to support both voice and data
traffic.
DSPM/SM
The DSPM/SM card, used at nodes with digital PBX
interfaces, compresses four digital voice channels. It has no
external I/O capabilities.
DSPM with FXS
Analog Interface
The analog DSPM/FXS card allows the PathBuilder S24x
switch to support up to two voice/fax channels per card. Each
DSPM/FXS card occupies one ISA slot in the PathBuilder
S24x switch.
DSPM with FXO
Analog Interface
The analog FXO daughtercard (when mounted on the
DSPM/HC) allows the PathBuilder S244 and S254 switch to
support one voice/fax channel per card. Each DSPM/HX
with FXO daughtercard combination occupies one ISA slot
in the PathBuilder S244 and S254 switch.
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Hardware Components
Component
Description (continued)
DSPM with E&M The PathBuilder S26x switch Analog DSPM/E&M card
Interface
allows the PathBuilder S26x switch to support up to two (2)
voice/fax channels per card. Each E&M card occupies one
ISA slot in the PathBuilder S26x switch. The PathBuilder
S26x switch E&M card supports both two- and four-wire
interfaces.
Ethernet Port 4
Limitations
Consider these limitations when using the Ethernet Port 4:
• The port does not support Bridging (refer to the Bridging Option,
Part No. T0008-16). When configuring this port, you are not prompted
for the bridge link number.
• The port does not support SLAC.
• When configuring the Ethernet Port 4, you are not prompted for the connector
type. Ethernet Port 4 only supports AUI.
1-10
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Hardware Components
Enclosure
Introduction
This section provides detailed information about the parts of the PathBuilder S24x,
26x, and 27x switch enclosure.
Front Panel
• Three status LEDs
• A 2-character numeric LED display
• A RESET switch
Status LEDs
The three status LEDs are:
• Power (green) — When on, indicates that power is on and all DC voltages are
within specifications.
• Status (green) — When on, indicates that the PathBuilder S24x, 26x, and 27x
switch node is executing either a power-up diagnostic or a software download.
This LED is normally off.
• Service (yellow) — When on, indicates a hardware failure. This LED is
normally off.
Numeric LED
Display
The 2-character numeric LED display provides system diagnostic codes. When the
Service LED is on, a 2-digit code on the numeric LED display corresponds to a
certain event.
Reset Switch
Power Supply
The RESET switch resets the node. Pressing the RESET switch is the equivalent of a
power-up operation which clears all existing calls and brings down all links.
The power supply is mounted at the top rear of the chassis. The AC switchable power
supply can operate at a nominal 110 or a nominal 230 Volts. For information about
maintaining and replacing the power supply, refer to Chapter 4, Maintenance.
Note
For this unit, the -48VDC Power Option is also available.
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Hardware Components
Motherboard
Parts of the
Motherboard
This section describes some of the components that make up the PathBuilder S24x,
26x, and 27x switch motherboard. In addition, this section describes some of the
daughtercards that can be found on the motherboard, shown in Figure 1-7.
DRAM SIMM
Slots 1 and 2
Power Supply
Ringer Status
Flash SIMM Slot
Optional Flash
SIMM Slot
Port 1
Port 2
Port 3
CMEM SIMM Slot
Data Compression
SIMM Slot
Global DRAM
SIMM Slot
Etherspan
AUI
Port 4
LED Connector
Port 6
1
2
3
4
5
6
7
8
Port 1
DIMs
Port 2
Switch 1
Switch 2
Figure 1-7. Motherboard
RAM
The PathBuilder S24x, 26x, and 27x switch comes standard with 16 Mbytes of local
DRAM for image execution and 8 Mbytes of global memory for buffer storage.
Ports
There are four serial data port DB-25 connectors for network or access functions
(2.048 Mbps):
• Ports 1 and 2 (DB 25) are Data Interface Module (DIM) ports
• Port 3 (DB 25) is a V.36 DTE port
• Port 4 (DB 15) is an Ethernet AUI port
• Port 6 (DB25) is the Control Terminal Port (EIA232)
1-12
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Hardware Components
FLASH SIMM
The FLASH Single In-line Memory Module (SIMM) holds a compressed image of
the operating software. This module is electrically erasable and reprogrammable.
An optional FLASH SIMM can be installed for backup. These modules are installed
Figure 1-8. FLASH SIMM
Note
The chips on your SIMM may vary from the one shown inFigure 1-8.
CMEM SIMM
The Configuration Memory Module (CMEM) SIMM has 512 Kbytes of memory and
provides the real time clock function. The CMEM is backed up by a lithium battery
in case of a power disruption.
Each PathBuilder S24x, 26x, and 27x switch has a Software Serial Number (SSN)
burned into a PROM located on the CMEM card. This SSN is used to verify the
software options that are enabled for that node. It is on the CMEM SIMM card for
easy removal and replacement in case of a motherboard failure.
Figure 1-9 shows the CMEM.
Warning
Only qualified service personnel should perform the procedure described in this
section. If the battery is installed incorrectly, it could explode after the PathBuilder
S200 series switch product is powered up, damaging the unit.
Avertissement
Seules des personnes qualifiées peuvent mettre en pratique les procédures décrites
dans cette section. Si la batterie n’est pas correctement installée, elle risque
d’exploser après la mise en marche du produit PathBuilder S200 series switch et
d’endommager l’unité.
Warnung
Die in diesem Abschnitt aufgeführten Vorgänge sollten ausschließlich von
qualifiziertem Servicepersonal durchgeführt werden. Wenn die Batterie
unsachgemäß installiert wird, kann sie nach dem Einschalten des PathBuilder S200
series switch-Produkts explodieren
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Hardware Components
Lithium Battery
Figure 1-9. CMEM SIMM
Expansion Port
I/O Slots
The PathBuilder S24x, 26x, and 27x switch motherboard has eight full-size
extend through the rear panel.
Port numbers for the ports on the I/O cards have a fixed relationship to the chassis
expansion slot number. Six port numbers are reserved for each slot. If a slot contains
an I/O card that does not support the full port count reserved for that slot, or the slot
is empty, the extra port numbers remain unused.
Slot Number and
Port Numbers
This table shows the port numbers associated with each card type.
Slot Number
Port Number
Associated Card
Motherboard
Motherboard I/O
1-6
1
2
3
4
5
6
7
8
7-12
Voice cards (E & M, FXS,
Server Module, T1, E1).
The T1/E1 is restricted to
Slot 8.
13-18
19-24
25-30
31-36
37-42
43-48
49-54
Description of
Serial/Network
Ports
Ports 1 through 3 are connected to the motherboard with ribbon cables. Ports 1 and 2
are DIM ports and are functional only if a DIM is present. Port 3 is a dedicated V.36
DTE port.
Ports 1, 2, 3, and 6 on the rear panel of the chassis are DB-25 female connectors. Port
4, (the Ethernet AUI port) uses a DB-15 connector. Ports 1 and 2 may require
adapters, depending on the DIM used. An adapter cable is available for Port 3.
1-14
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Hardware Components
How Ports Are
Used
The following table describes how the ports are used.
Port Number
Use
1, 2, and 3
Recommended for network port connection or cluster
connectivity. Ports 1 and 2 have variable interfaces, depending
on the DIMs.
4
6
Ethernet AUI port for routing applications.
Control Terminal Port (CTP). When operating as an
asynchronous interface, it can support data rates up to 115.2
kbps. Default CTP configuration parameters are 9600 baud,
8-bit characters, 1 stop bit, no parity. This is an EIA 232-D
DCE port using a DB-25 connector.
DIMs without a
Cable Adapter
Ports 1 and 2 support a DSU DIM without the use of cable adapters.
DIMs with a Cable If cable adapters are used, Ports 1 and 2 can support the following DIMs:
Adapter
• High Speed (V.36)
• V.35
• V.11/ISO-4903
Each DIM port can be configured independently of the other port. For example, you
can install: two V.35 DIMs; one V.35 DIM and one V.11 DIM; or two V.11 DIMs.
The cable adapter pinouts are described in Appendix A, Cables.
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Hardware Components
Back Panel
Back Panel
The components of the back panel are:
Components
• Serial/Network I/O Ports. Ports 1, 2, 3, and 6 are DB-25 connectors. Port 4
is a DB 15 connector.
• AC Power Supply. The rear of the Power Supply has two (male and female)
power source connectors (one is for connection to an AC source and the other
is an AC outlet) along with a selectable 115 VAC or 230 VAC switch. For
most international usage, the switch must be set for 230 VAC.
• DC Power Supply. The unit can be shipped with the -48VDC Power Option.
The terminal block of the -48VDC has 5 screws. The two outermost screws
are for attachment. The negative wire terminal is second from the left; the
positive wire terminal is in the middle; the ground is second from the right.
• Expansion Card Ports. The expansion card ports differ depending on what
card is installed in that slot.
Figure 1-10 shows the PathBuilder S24x, 26x, and 27x switch back panel.
Optional -48V
Power Supply
Power
Supply
115/230 VAC
Voltage Select
Switch
AUI Port 4
(Ethernet Routing)
Serial/Network
I/O Ports 1,2, 3, 6
Product
ID Label
Expansion
Card Ports
Slots 1 through 8
Figure 1-10. PathBuilder S24x, 26x, and 27x Switch Back Panel
1-16
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Hardware Components
TI Dual Port Digital PBX Interface Card
Introduction
The T1 dual port digital PBX interface card supports digital voice communications,
providing integrated network access. The T1 interface card is installed primarily in
North America and Japan. A 2-megabyte T1 card is required for passing data and
voice traffic.
N
109 8 7 6 5 4 3 2 1
O
SW1 DIP Switch Bank
MVIP Bus Interface Connector
Port 50 LED
SysFail LED
Port 49 LED
Run LED
Port 49 Interface
Port 50 Interface
ISA Bus Interface
Serial Diagnostic Port (Not Supported)
Pin 8
Pin 1
Figure 1-11. T1 Dual Port Digital PBX Interface Card
Description
Function
Each T1 dual port digital PBX interface card uses an Industry Standard Architecture
(ISA) bus interface and a Multi-Vendor Integration Protocol (MVIP) bus interface.
The MVIP bus interface provides multiplexed digital access within the PathBuilder
S24x, 26x, and 27x switch chassis.
T1 dual port digital PBX interface cards provide the digital interfaces for
connections to a PBX. The T1 dual port digital PBX interface cards bring PCM voice
and channel signaling into the node. The PCM voice data and voice signaling is
routed to a DSPM/SM card over the MVIP bus for compression and transmission to
the remote end.
About the PathBuilder S24x, 26x, and 27x switch
1-17
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Hardware Components
Slot Restriction
The T1 dual port digital PBX interface card occupies slot 8 in the PathBuilder S24x,
26x, and 27x switch chassis.
DIP Switch
Location
The T1 dual port digital PBX interface card contains a single DIP switch bank (SW1)
used to assign the card’s I/O base address.
DIP Switch
Settings
Set the DIP switches on the T1 dual port digital PBX interface card as shown in
T1/CSU Daughter
Card
The T1/CSU Daughtercard provides a 1.544 MHz point-to-point interface for North
American service that conforms to AT&T 62411/62421 standard. The card is FCC
Part 68 Registered and uses eternal clocking derived from the telephone network.
One or two T1/CSU Daughter Cards can be installed onto the T1 Dual Port card. The
top card supports port 49 and the bottom supports port 50.
For instructions for installing the T1/CSU card, refer to “Installing the T1/CSU
Daughter Card” section in Chapter 3.
Required Cables
These cables ship with the T1 dual port digital PBX interface card and are required to
cable the T1 dual port digital PBX interface card to the DSPM/SM cards in the node.
Cable Description
Function
One 4-position 40-pin
MVIP ribbon cable
Connects up to 3 DSPM/SM cards to interconnect
digital voice traffic between individual cards in the
same PathBuilder S24x, 26x, and 27x switch node.
One 8-position 40-pin
MVIP ribbon cable
Connects 4 or more DSPM/SM cards to interconnect
digital voice traffic between individual cards in the
same PathBuilder S24x, 26x, and 27x switch node.
Two 8-pin modular to
DB15 cables
3-ft adapter converter cables used to convert the
8-pin modular connector on the front of the T1/E1
card to a DB15 connector (Product Code 17269).
1-18
About the PathBuilder S24x, 26x, and 27x switch
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Hardware Components
LED Status
Indicators
The T1 dual port digital PBX interface card contains four LEDs that can be viewed
through the rear bracket.
LED
Port 49
Color
Yellow
LED is...
...Indicating
Normal operation
OFF
ON
Carrier failure on Port 49span
Port 50
RUN
OFF
ON
Normal operation
Yellow
Green
Carrier failure on Port 50 span
OFF
ON
Card failure
Card Active
SYSFAIL
OFF
ON
Normal operation
Card failure
Yellow
About the PathBuilder S24x, 26x, and 27x switch
1-19
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Hardware Components
E1 Dual Port Digital PBX Interface Card
Introduction
The E1 dual port digital PBX interface card supports digital voice communications,
installed primarily in Europe and South America. A 2-megabyte E1 card is required
for passing data traffic and voice traffic.
Description
Each E1 dual port digital PBX interface card uses an Industry Standard Architecture
(ISA) bus interface and a Multi-Vendor Integration Protocol (MVIP) bus interface.
The MVIP bus interface provides a multiplexed digital access within the PathBuilder
S24x, 26x, and 27x switch chassis.
The E1 dual port digital PBX interface card has two E1 ports (CAS signaling only),
handles E1 lines with or without CRC4, and supports 120Ω and 75Ω (with the
addition of an optional cable). The interface type is 8-pin modular.
Function
E1 dual port digital PBX interface cards provide the digital interfaces for
connections to a PBX. The dual port digital PBX interface cards bring PCM voice
and channel signaling into the node. The PCM voice data and voice signaling is
routed to a DSPM/SM card over the MVIP bus for compression and transmission to
the motherboard.
Slot Restriction
The E1 dual port digital PBX interface card can only occupy slot 8 in the PathBuilder
S24x, 26x, and 27x switch chassis.
1-20
About the PathBuilder S24x, 26x, and 27x switch
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Hardware Components
PBX Interface Card
Illustration
N
109 8 7 6 5 4 3 2 1
O
SW1 DIP Switch Bank
MVIP Bus Interface Connector
Port 49
Alarm LED
Port 50
Alarm LED
SysFail LED
Run LED
Port 49 Interface
Port 50 Interface
ISA Bus Interface
Serial Diagnostic Port
Pin 6
Pin 1
Figure 1-12. E1 Digital PBX Interface Card
DIP Switch
Location
The E1 dual port digital PBX interface card contains a single DIP switch bank (SW1)
used to assign the card’s I/O base address.
DIP Switch
Settings
About the PathBuilder S24x, 26x, and 27x switch
1-21
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Hardware Components
Required cables
The following cables, including two pigtail cables, ship with the E1 dual port digital
PBX interface card and are required to cable the E1 card to the DSPM/SM cards in
the PathBuilder S24x, 26x, and 27x switch node.
Cable Description
Function
One 4-position 40-pin
MVIP ribbon cable
Connects up to three DSPM/SM cards to
interconnect digital voice traffic between individual
cards in the same PathBuilder S24x, 26x, and 27x
switch node.
One 8-position, 40-pin
MVIP ribbon cable
Connects four or more DSPM/SM cards to
interconnect digital voice traffic between individual
cards in the same PathBuilder S24x, 26x, and 27x
switch node.
Two 8-pin modular to DB15 For 120Ω connection.
cables
Two 8-pin modular to BNC For 75Ω connection.
cables
LED Status
Indicators
The E1 dual port digital PBX interface card contains four LEDs that can be viewed
through the rear bracket:
LED
Port 49
Color
Yellow
LED is...
...Indicating
Normal operation
OFF
ON
Carrier failure on Port 49 span
Port 50
RUN
Yellow
Green
OFF
ON
Normal operation
Carrier failure on Port 50 span
OFF
ON
Card failure
Microprocessor Activity
SYSFAIL
Yellow
OFF
ON
Normal operation
Card failure
1-22
About the PathBuilder S24x, 26x, and 27x switch
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Hardware Components
DSPM/SM Card
Introduction
Description
Function
The Digital Signal Processing Module/Server Module (DSPM/SM) supports T1 or
E1 dual port digital PBX interface cards.
The DSPM/SM card, used at nodes with digital PBX interfaces, compresses four
digital voice channels. It has no external I/O capabilities.
PCM voice and voice signaling, brought into the PathBuilder S24x, 26x, and 27x
switch node by the T1/E1 cards, is routed to a DSPM/SM card over the MVIP bus for
compression and transmission to the remote end.
When You Receive When you receive a DSPM/SM card, do the following:.
the Card
Step
Action
1
2
Remove the card from the packing material.
Inventory the contents of the shipping container.
Note
No cables are shipped with the DSPM/SM card. The appropriate
Multi-Vendor Integration Protocol 40-pin ribbon cable and other cables
ship with the T1 or E1 dual port digital interface cards.
3
4
5
Power off the PathBuilder S24x, 26x, and 27x switch node.
Install the card into the PathBuilder S24x, 26x, and 27x switch node.
Cable the card to the T1 or E1 dual port digital interface cards as
required.
About the PathBuilder S24x, 26x, and 27x switch
1-23
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Hardware Components
DSPM/ SM Card
Illustration
Figure 1-13 shows an example of the DSPM/SM card.
MVIP Bus Interface Connector
Installed
MVIP Clock Termination Jumpers
Not
Installed
Figure 1-13. DSPM/SM Card
Multi-Vendor Integration Protocol clock.
Installing Jumpers Figure 1-13 shows how to install the jumpers on the DSPM/SM card to terminate the
Multi-Vendor Integration Protocol clock.
The DSPM/SM card with the jumpers set to the installed position must be located
located in slot 8). All other DSPM/SM cards must have their jumpers in the “not
installed” position.
1-24
About the PathBuilder S24x, 26x, and 27x switch
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Hardware Components
Cables Required
No cables ship with the DSPM/SM card; however, the DSPM/SM card must be
cabled to the T1 or E1 dual port digital interface using a Multi-Vendor Integration
To support 12 voice channels, for instance, you need three DSPM/Server Module
cards.
Note: The DSPM/SM card with
the jumpers set to the installed
position must be located furthest
away from the E1 or T1 card, the
top card, as shown in this figure.
®
MVIP 4-Position Cable
DSPM/SM
T1 or E1
Restricted to Slot 8
Figure 1-14. Cabling T1/E1 Card to DSPM/SM Cards
About the PathBuilder S24x, 26x, and 27x switch
1-25
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Hardware Components
DSPM Card with Analog E&M Interface
Introduction
Description
The DSPM/E&M card supports two analog E&M interface voice channels.
The Analog DSPM/E&M card allows the PathBuilder S24x, 26x, and 27x switch to
support up to two (2) voice/fax channels per card. Each E&M card occupies one ISA
slot in the PathBuilder S24x, 26x, and 27x switch. The PathBuilder S24x, 26x, and
27x switch E&M card supports both two- and four-wire interfaces.
Function
The DSPM/E&M card allows a PBX to attach to one of its two connectors.
-48V Ringer/ Power The DSPM/E&M card requires installation of a -48V ringer/power supply card and
Supply Card
Required
enclosure into the PathBuilder S24x, 26x, and 27x switch node to support interface
types II, III, and V.
Interface type I does not require a -48V ringer/power supply.
Cables Required
The DSPM/E&M interface card requires a -48V ringer/power supply cable to
support interface types II, III, and V.
The -48V ringer/power supply cable connects up to six DSPM cards to the power
supply. The cable ships with the -48V ringer/power supply.
For details on how to cable the DSPM card to the -48V ringer/power supply, refer to
the “-48V Ringer/Power Supply Card and Enclosure” section on page 1-53.
When You Receive When you receive a DSPM/E&M card, do the following:
the Card
Step
Action
Remove it from the packing material.
1
2
Inventory the contents of the shipping container.
Note
No cables are shipped with the DSPM/E&M card. The appropriate
6-position power cable and status cable ship with the -48V ringer/power
supply card that must be used in conjunction with the DSPM/E&M
card.
3
4
5
6
Set jumpers as required.
Power off the node.
Install the card into the PathBuilder S24x, 26x, and 27x switch node.
Cable the card to the -48V ringer/power supply as required.
1-26
About the PathBuilder S24x, 26x, and 27x switch
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Hardware Components
DSPM/E&M Card
Illustration
Figure 1-15 shows an example of the DSPM card with an analog E&M interface.
MVIP Clock Termination Jumpers (Not Used)
-48V Power Supply Connector
Port 1
2-or 4-wire Jumpers
Port 2
Complex Impedance Jumpers
Port 1 RM
Port 1 LC
(Remote Busy) (Local Busy)
Pin 8
Pin 1
Port 2 RM
Port 2 LC
(Remote Busy) (Local Busy)
Figure 1-15. DSPM/E&M Card
About the PathBuilder S24x, 26x, and 27x switch
1-27
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Hardware Components
LEDs
The card contains four LEDs that can be viewed through the rear bracket.
LED
Color
Green
LED is...
On
...Indicating
Port 1 Local
Busy
local physical connection is active
(offhook)
Off
local physical connection is idle
(onhook)
Port 1 Remote Green
Busy
On
remote end is active (offhook)
remote end is idle (onhook)
Off
Port 2 Local
Busy
Green
On
local physical connection is active
(offhook)
Off
local physical connection is idle
(onhook)
Port 2 Remote Green
Busy
On
remote end is active (offhook)
remote end is idle (onhook)
Off
1-28
About the PathBuilder S24x, 26x, and 27x switch
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Hardware Components
Setting Jumpers for DSPM Card with Analog E&M Interface
Introduction
The DSPM/EM card has a total of 12 jumpers that you can set for various
applications if required:
• Ten jumpers for two- or four-wire operation
• Two jumpers for MVIP clock termination (not used at present)
Default Jumper
Settings
The DSPM/EM card ships from the factory with the ten jumpers for two- or
four-wire operation set to four-wire.
Jumper Definitions Jumpers J11 through J15 are associated with Port 1.
Jumper
Number
4-Wire/600
2-Wire/600
2-Wire/UK
Complex
2-Wire/
Germany
Complex
J11
600
600
COM
COM
J12
J13
4W
2W
2W
UK
2W
Don’t Care
(Default
Don’t Care
(Default
Germany
Germany)
Germany)
J14
J15
600
600
COM
COM
4W (removed) 2W (installed) 2W (installed) 2W
(installed)
Jumpers J21 through J25 are associated with Port 2.
Jumper
Number
4-Wire/600
2-Wire/600
2-Wire/UK
Complex
2-Wire/
Germany
Complex
J21
600
600
COM
COM
2W
J22
J23
4W
2W
2W
UK
Don’t Care
(Default
Don’t Care
(Default
Germany
Germany)
Germany)
J24
J25
600
600
COM
COM
4W (removed) 2W (installed) 2W (installed) 2W
(installed)
About the PathBuilder S24x, 26x, and 27x switch
1-29
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Hardware Components
Complex
Setting jumpers for two-wire UK complex and two-wire Germany complex
Impedance for UK impedance as noted in the “Jumper Definitions” section above, matches the
and Germany
370
620
.31µƒ
Figure 1-16. UK Complex Impedance
220
820
.115µƒ
Figure 1-17. Germany Complex Impedance
1-30
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Hardware Components
J15
4W
J13
2W
J21 J22
J11 J12
J14
J24
C
6
C
6
J23
J25
4W
2W
J15
(Port 1)
2W
J11
J12
J21
(Port 1) (Port 1) (Port 2)
J14
(Port 1)
J24
(Port 2)
COM 600Ω COM 600Ω
J25
(Port 2)
2W 4W
Figure 1-18. Jumper Locations for DSPM E&M Card
Installing Jumpers Figure 1-19 illustrates how to install two- or four-wire jumpers into proper position.
Installing 3 Position Jumpers
Installing 2 Position Jumpers
Jumpers
4-Wire (removed)
Jumpers
2-Wire
(installed)
Figure 1-19. Installing Jumpers
About the PathBuilder S24x, 26x, and 27x switch
1-31
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Hardware Components
DSPM Card with FXS Analog Interface
Introduction
The Analog DSPM/FXS (Foreign Exchange Station) card supports two analog FXS
interfaces.
Description
The analog DSPM/FXS card allows the PathBuilder S24x, 26x, and 27x switch to
support up to two voice/fax channels per card. Each DSPM/FXS card occupies one
ISA slot in the PathBuilder S24x, 26x, and 27x switch.
Function
The FXS interface provides a ringing voltage which alerts a station of an incoming
call’s -48V to power the phone/fax, and its -48V loop current detector to detect when
the station goes off hook. As a result, an analog DSPM card with an FXS interface
allows a telephone set, fax machine, or telephone key set to attach to one of its two
connectors.
When You Receive When you receive a DSPM/FXS card, do the following:.
the Card
Step
Action
1
2
Remove the card from the packing material.
Inventory the contents of the shipping container.
Note
No cables are shipped with the DSPM/FXS card. The appropriate
6-position power cable and status cable ship with the -48V ringer/power
supply card that must be used in conjunction with the DSPM/FXS card.
3
4
5
Power off the PathBuilder S24x, 26x, and 27x switch node.
Install the card into the PathBuilder S24x, 26x, and 27x switch node.
Cable the card to the -48V ringer/power supply as required.
-48V Ringer/Power The DSPM/FXS card requires installation of a -48V ringer/power supply card and
Supply Required
enclosure into the PathBuilder S24x, 26x, and 27x switch node. Refer to the
Cables Required
The DSPM/FXS interface card requires a -48V ringer/power supply cable, which can
attach up to two DSPM/FXS cards to the power supply. The cable ships with
the -48V ringer/power supply card and enclosure.
For details concerning how to install and cable the DSPM card to the -48V ringer/
power supply card and enclosure, refer to the “-48V Ringer/Power Supply Card and
Enclosure” section on page 1-38.
1-32
About the PathBuilder S24x, 26x, and 27x switch
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Hardware Components
DSPM/FXS Card
Illustration
Figure 1-20 shows an example of the DSPM card with an analog FXS interface.
MVIP Clock Termination
Jumpers (Not Used)
-48V Power Supply
Connector
Port 1
Port 2
Port 1 RM
Port 1 LC
(Remote Busy) (Local Busy)
Pin 6
Pin 1
Port 2 RM
Port 2 LC
(Remote Busy) (Local Busy)
Figure 1-20. DSPM Card with Analog FXS Interface
About the PathBuilder S24x, 26x, and 27x switch
1-33
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Hardware Components
LEDs
The card contains four LEDs that can be viewed through the rear bracket.
LED
Color
Green
LED is...
On
...Indicating
Port 1 Local
Busy
local physical connection is active
(offhook)
Off
local physical connection is idle
(onhook)
Port 1 Remote Green
Busy
On
remote end is active (offhook)
remote end is idle (onhook)
Off
Port 2 Local
Busy
Green
On
local physical connection is active
(offhook)
Off
local physical connection is idle
(onhook)
Port 2 Remote Green
Busy
On
remote end is active (offhook)
remote end is idle (onhook)
Off
Jumper Locations The DSPM/FXS interface card has no jumpers that must be set.
For Australian
Users
Only 3Com approved engineering staff can install and program this card.
The QDU rating for the voice compression algorithm used by this equipment is:
* 8k 4.5 QDU
* 16k 2.63 QDU
The total number of QDU in any application must be managed according to the
guidelines in the Private Network Design Guide published by Standards Australia.
Failure to adhere to these guidelines is a breach of Australian Communications
Authority regulations.
1-34
About the PathBuilder S24x, 26x, and 27x switch
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Hardware Components
DSPM Host Card with FXO Analog Interface
Introduction
The Analog DSPM/HC (host card) supports one analog FXO (Foreign Exchange
Office) interface. The FXO is a daughtercard that is mounted onto the DSPM/HC.
Description
The analog FXO daughtercard (when mounted on the DSPM/HC) allows the
PathBuilder S24x, 26x, and 27x switch to support one voice/fax channel per card.
Each DSPM/HX with FXO daughtercard combination occupies one ISA slot in the
PathBuilder S24x, 26x, and 27x switch.
Function
The FXO interface provides a method for connecting to the PBX, simulating a
phone. The FXO interface:
• has a ring voltage detector for detecting an incoming call
• can generate a loop closure for acknowledging an incoming call request
• can generate a call request to a PBX
When You Receive When you receive a DSPM/HC with FXO daughtercard, do the following:.
the Card
Step
Action
1
2
Remove the card from the packing material.
Inventory the contents of the shipping container.
Note
No cables are shipped with the DSPM/HC with FXO interface.
3
4
Power off the PathBuilder S24x, 26x, and 27x switch node.
Install the card into the PathBuilder S24x, 26x, and 27x switch node.
About the PathBuilder S24x, 26x, and 27x switch
1-35
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Hardware Components
Card Illustration
FXO Daughtercard
Port 1
(Remote Busy)
Port 1
(Local Busy)
Port 2
(Remote Busy)
Port 2
(Local Busy)
Pin 6
Pin 1
Figure 1-21. DSPM/HC Card with Analog FXO Daughtercard
LEDs
The card contains four LEDs that can be viewed through the rear bracket.
LED
Color
Green
LED is...
On
...Indicating
Port 1 Local
Busy
local physical connection is active (offhook)
local physical connection is idle (onhook)
Off
Port 1 Remote Green
Busy
On
remote end is active (offhook)
remote end is idle (onhook)
Off
Port 2 Local
Busy
Green
On
local physical connection is active (offhook)
local physical connection is idle (onhook)
Off
Port 2 Remote Green
Busy
On
remote end is active (offhook)
remote end is idle (onhook)
Off
1-36
About the PathBuilder S24x, 26x, and 27x switch
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Hardware Components
Jumper Locations The DSPM/HC with FXO daughtercard has no jumpers that must be set.
About the PathBuilder S24x, 26x, and 27x switch
1-37
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Hardware Components
-48V Ringer/Power Supply Card and Enclosure
Introduction
One -48V ringer/power supply card and enclosure is required per PathBuilder S24x,
26x, and 27x switch node for
• Analog DSPM/FXS cards
• DSPM/E&M cards using interface signaling types II, III, and V.
DSPM/E&M card with an interface signaling of type I does not require a -48V
ringer/power supply card and enclosure.
Description
The -48V ringer/power supply card comes in an enclosure, which you must install in
the PathBuilder S24x, 26x, and 27x switch if you are field upgrading to support the
Voice option.
New PathBuilder S24x, 26x, and 27x switch nodes ordered with the voice option
ship with the -48V ringer/power supply factory installed.
The -48V ringer/power supply card supports the following:
• 12 E&M ports, or 6 DSPM/E&M cards
• 4 FXS ports, or 2 DSPM/FXS cards
Function
The -48V ringer/power supply card rings up to four phones at a time.
-48V Ring/Power
Supply Types
There are two versions of the -48V ringer/power supply: Standard and Enhanced.
FXS cards.
FXS cards. (Available in the Fall of 1998.)
Jumper Definitions The -48V ringer/power supply card has two sets of jumpers for various requirements.
• One set of jumpers to enable or disable the -48V ringer supply output (should
not be changed from its default setting of enabled.)
• One set of jumpers to control the frequency of the ring supplied to the DSPM/
FXS card: 25 Hz (US) or 50 Hz (Europe).
Jumper Locations The jumpers for 25 or 50 Hz ring frequency are located on the -48V ringer/power
Installing Jumpers Figure 1-22 and Figure 1-23 show jumper positions on the -48V ringer/power supply
card for 25 or 50 Hz ring frequency and how to install the jumpers for 25 or 50 Hz
ring frequency.
1-38
About the PathBuilder S24x, 26x, and 27x switch
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Hardware Components
Cables Required
The -48V ringer/power supply card is shipped with one cable with six connectors.
-48V Power
Supply Connector
(to each DSPM card)
Ring Enable Jumper
Must be Configured
as Shown
Jumper Set
for 25 Hz
Ring Frequency
Power Connectors to
Main AC Power Supply
Jumper Set
for 50 Hz
Ring Frequency
Status Connector
Figure 1-22. Standard -48V RInger/Power Supply Card and Enclosure
About the PathBuilder S24x, 26x, and 27x switch
1-39
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Hardware Components
Ring Enable Jumper
Must be Configured
as Shown
J12
J11
J11 Jumper Set for 25 Hz
Ring Frequency
J11 Jumper Set for 25 Hz
Ring Frequency
Jumper Locations
Output Connectors
Power Connectors to
Main AC Power Supply
Status Connector
Figure 1-23. Enhanced -48V RInger/Power Supply Card and Enclosure
1-40
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Hardware Components
10BaseT Transceiver
Description
This transceiver is designed to provide Ethernet 10baseT support for the PathBuilder
S24x, 26x, and 27x switch. It can accommodate different 10BaseT configurations
through the user-selectable Signal Quality Error (SQE) function. See Figure 1-24.
Some network devices do not recognize this signal. If the attached network device
does not recognize this SQE signal, set the switch to Off.
RJ45 Connector
SQUE Switch
15-Pin D-Type Connector
Figure 1-24. 10BaseT Transceiver
The 10BaseTransceiver can be connected to the Ethernet LAN (ELAN) card or the
PathBuilder S24x, 26x, and 27x switch’s Port 4.
About the PathBuilder S24x, 26x, and 27x switch
1-41
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Radio Frequency Interference Regulations
Radio Frequency Interference Regulations
Introduction
FCC
This section explains the radio frequency interference regulations.
This equipment has been tested and found to comply with the limits for a Class A
digital device, pursuant to Part 15 of the FCC rules, CISPR Publication 22:85 and
EN 55022:87. These limits are designed to provide reasonable protection against
interference when the equipment is operated in a commercial environment. This
equipment generates, uses, and can radiate radio frequency energy, and, if not
installed and used in accordance with the instruction manual, may cause interference
to radio communications.
Changes or modifications not expressly approved by 3Com could void the user’s
authority to operate the equipment.
Canadian DOC
This digital apparatus does not exceed the Class A limits for radio noise emissions
from digital apparatus set out in the radio interference regulations of the Canadian
Department of Communications.
Operation of this equipment in a residential area is likely to cause interference, in
which case the user will be required to take adequate measures to correct the
interference at his/her own expense.
General
This product was verified under test conditions that include some use of shielded
DTE cable(s). Use of different cables will invalidate verification and increase the risk
of causing interference to radio and TV reception.
You can obtain the proper cables from 3Com.
1-42
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Telecommunications Regulations
Telecommunications Regulations
In the United States, FCC rules Part 68 require that the following user instructions
are provided:
The telephone company has the right to ask you for registration information about
your equipment that is connected to the telephone line. When requested, you
should provide your equipment’s FCC registration number and ringer equivalence
number (REN), if applicable.
The user instructions shall include the FCC registration number and a detailed list
of all ports that connect to the network. The information provided must also
include USOC connector jacks, the facility interface codes (FOC), service order
codes, (SOCs), and REN, as applicable.
REN is used to determine the number of devices that can be connected to an analog
telephone line, but is generally not applicable to digital service equipment.
Excessive RENs on the line may result in the devices’ not ringing in response to an
incoming call. Contact the telephone company to determine the maximum REN
sum for the calling area; in general, it should not exceed five.
The telephone company may change its equipment, operations, or procedures.
If these changes affect your equipment or service, the telephone company will
provide written notice so you may make the necessary changes with uninterrupted
service.
FCC regulations and telephone company procedures prohibit connection of
customer-provided equipment to telephone company-provided coin service (central
office-implemented systems). Connection to party lines is subject to state tariffs.
Contact your telephone company if you have any questions about your telephone
line.
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Telecommunications Regulations
In Canada, the following equipment attachment limitations and information must be
provided in the user instructions:
The Canadian Department of Communications label identifies certified equipment.
This certification means that the equipment meets certain telecommunications
network protective operational and safety requirements. The Department does not
guarantee the equipment will operate to the user’s satisfaction.
Before installing this equipment, users should ensure that it is permissible to be
connected to the facilities of the local telecommunications company.
The equipment must also be installed using an acceptable method of connection. In
some cases, the company’s inside wiring associated with a single line individual
service may be extended by means of a certified connector assembly (telephone
extension cord). The customer should be aware that compliance with the above
conditions may not prevent degradation of service in some situations.
Repairs to certified equipment should be made by an authorized Canadian
maintenance facility designated by the supplier. Any repairs or alterations made by
the user to this equipment, or equipment malfunctions, may give the
telecommunications company cause to request the user to disconnect the
equipment.
Users should ensure for their own protection that the electrical ground connections
of the power utility, telephone lines, and internal metallic water pipe system, if
present, are connected together. This precaution may be particularly important in
rural areas.
Caution
Users should not attempt to make such connection themselves, but should contact the
appropriate electric inspection authority, or electrician, as appropriate.
Mise en Garde
Les utilisateurs ne doivent pas établir de telles connexions eux-mêmes. Ils doivent
contacter une personne compétente ou un électricien.
Warnung
Benutzer sollten nicht versuchen, diese Verbindung selbst herzustellen, sondern
dazu die zuständige Aufsichtsbehörde für Elektroinstallationen bzw. einen
Elektroinstallateur kontaktieren.
Note
The Load Number (LN) assigned to each terminal device denotes the total load
percentage to be connected to a telephone loop used by the device to prevent
overloading. The loop termination can consist of any combination of devices as
long as their total LNs do not exceed 100.
1-44
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FCC and Telephone Company Procedures and Requirements
FCC and Telephone Company Procedures and Requirements
Introduction
The following tables provide the information that is needed for ordering telephone
company network connections for the 3Com PathBuilder S24x, 26x, and 27x switch
V.22 bis modem.
How to Order Connections in the U.S.A.
Service
Description
USOC Jack
Connector
REN
Facility Interface
Code
PSTN-permissive
RJ11C
0.8B 02LS2
How to Order Connections in Canada
Service
Description
Connection
Arrangement
LN
15
Network
Interface
PSTN- permissive
CA11A
LS
Ordering
Connections for
the T1/CSU
To order the proper connections for a PathBuilder S24x, 26x, and 27x switch with a
T1 Dual Port Interface card with T1/CSU daughtercards, provide the telephone
company with the following information:
• Interface type
• Required USOC jack connector number
• Service code
• Facility interface codes
Interface Type
USOC Jack
Connector
Service
Code
Facility Interface
Code
56-kbps digital interface
56-kbps digital interface
56-kbps digital interface
56-kbps digital interface
RJ48
RJ48
RJ48
RJ48
6.0P
04DU9-BN
04DU9-1ZN
04DU9-1KN
04DU9-1SN
6.0P
6.0P
6.0P
If Problems Arise
If any of your telephone equipment is not operating correctly, immediately remove it
from the telephone line before it harms your network. If the telephone company
notes the problem, they will notify you in advance, if possible, and may temporarily
disconnect your service. When you are notified, you will be given the chance to
correct the problem and be informed of your right to file a complaint with the FCC.
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FCC Information
FCC Information
Customer-Provided FCC regulations and telephone company procedures prohibit connection of
Telephone
Equipment
customer-provided equipment to telephone company-provided coin service (central
office-implemented systems). Connection to party lines is subject to state tariffs.
Occasionally, the telephone company may make changes in their equipment,
operations, or procedures. If these changes affect your equipment or service, the
telephone company will provide written notice so you can make the necessary
changes to maintain uninterrupted service.
Contact your telephone company if you have any questions about your telephone
line.
In some circumstances, the telephone company may ask you for information about
your equipment that is connected to the telephone line. Within the United States
(at the request of the telephone company), you should provide your equipment’s
FCC registration number. This number is AT9USA-21085-DD-N and is located on
the unit’s label.
FCC and Telephone
Company
Procedures and
Requirements
Before you connect the PathBuilder S24x, 26x, and 27x switch DSU option to the
network, you must provide the telephone company with the information shown
below.
Type of Interface
USOC Jack REN/Service Facility Interface
Connector Code Code
56-kbps digital interface RJ48S 04DU5-56
6.0F
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FCC Information
Regulations
Concerning
Electromagnetic
Radiation
The Federal Communications Commission (FCC) of the United States of America
and the Industry and Science Canada (ISC) have published regulations that govern
the allowable limits of emanation of radio frequency energy of computing devices
and associated peripherals. These regulations are concerned with interference to
radio communications, such as radio and television. The regulations require
equipment for use in the United States or Canada to be labeled and to be
accompanied by the following notice:
This equipment has been tested and found to comply with the limits for a Class A
digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against interference when equipment is operated in a
commercial environment. This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accordance with the instruction
manual, may cause interference to radio communications.
This digital apparatus does not exceed the Class A limits for radio noise emissions
from digital apparatus set out in the radio interference regulations of the ISC.
Operation of this equipment in a residential area is likely to cause interference in
which case the user will be required to take adequate measures to correct the
interference.
This product was verified under test conditions that include use of shielded DTE
cable(s). Leased line cables with 1.5 turns through a ferrite cylinder were also used.
Use of different cables will invalidate verification and increase the risk of causing
interference to radio and TV reception.
You can obtain the proper cables from 3Com.
Correcting
Interference
If this equipment causes interference to radio or television reception, which can be
determined by turning the equipment off and on, you are encouraged to try to correct
the interference by one or more of the following measures:
• Reorienting the receiving antenna
• Relocating the equipment with respect to the receiver
• Moving the equipment away from the receiver
• Plugging the equipment into a different outlet so that the equipment and
receiver are on different circuits
If necessary, you should consult the dealer or an experienced radio/television
technician for additional circuits.
Additional
Information
You may find the following booklet prepared by the FCC helpful: How to
Identify and Resolve Radio-TV Interference Problems. This booklet is available
from the U.S. Government Printing Office, Washington, D.C. 20402,
Stock No. 004-000-00345-4.
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1-48
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Chapter 2
Preparation and Unpacking
Overview
Introduction
This chapter summarizes information you need and activities you must complete
before installing your PathBuilder S24x, 26x, and 27x switch system.
It describes how to select an operating environment and how to unpack the
enclosure.
Preparation and Unpacking
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Before Installing Your PathBuilder S24x, 26x, and 27x Switch
Before Installing Your PathBuilder S24x, 26x, and 27x Switch
Introduction
Before installing your PathBuilder S24x, 26x, and 27x switch, be sure to complete
the following steps:
• Verify that the configuration worksheets are accurate and complete. Be sure
that they are prepared beforehand according to your network requirements.
• Be sure you have all the required information from your service provider.
• Configure, connect, and test the network termination unit (for example, a
CSU) through which the PathBuilder S24x, 26x, and 27x switch connects to
the network.
Selecting an
Operating
Environment
Choose a site for your PathBuilder S24x, 26x, and 27x switch that is within 6 feet
(1.8m) of an appropriate power source. Depending on your application and the
country in which the PathBuilder S24x, 26x, and 27x switch will operate, this may
be a grounded 115 or 230 VAC outlet.
Caution
The voltage select switch on the back of the power supply must be set for 230 VAC
for use where applicable.
The area selected should be free of accumulated dust and environmental extremes.
The acceptable temperature range for operating the unit is 32× to 122×F (0× to
50×C) at sea level. Relative humidity should not exceed 90% (noncondensing).
Allow at least 12 inches (30.5 cm) in back of the unit for cable clearance and air
circulation.
Mise en Garde
Le commutateur de sélection de tension à l’arrière du bloc d’alimentation doit être
sur la position 230 VAC (tension courant alternatif) pour une utilisation appropriée.
Choisissez un emplacement propre et sûr, dont la température se situe entre 0 et 50
degrés Celsius (32 et 122 degrés Fahrenheit) au niveau de la mer. L’humidité ne doit
pas excéder 90% (sans condensation).
Laissez un espace d’au moins 30,5 cm (12 pouces) derrière l’unité pour les câbles et
la circulation de l’air.
Vorsicht
Der Spannungsumschalter auf der Rückseite des Netzteils muß für die
entsprechenden Länder auf 230 VAC eingestellt sein.
Der Betriebsort sollte staubfrei und keinen extremen Umwelteinflüssen ausgesetzt
sein. Der akzeptable Temperaturbereich für den Betrieb des Gerätes liegt zwischen 0
und 50 Grad Celcius auf Meereshöhe. Die relative Luftfeuchtigkeit sollte 90% (nicht
kondensierend) nicht übersteigen.
Halten Sie einen Wandabstand von mindestens 30,5 cm auf der Geräterückseite zur
ungehinderten Verlegung der Kabel und Entlüftung ein.
2-2
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Before Installing Your PathBuilder S24x, 26x, and 27x Switch
Caution
To avoid overheating the unit’s circuitry, you should never place anything on top of
the unit, within one inch (2.5 cm) of the ventilation slots on the front panel, or within
12 inches (30.5 cm) of the back of the unit.
Mise en Garde
Afin d’éviter toute surchauffe des circuits de l’unité, ne placez aucun objet sur l’unité
à moins de 2,5 cm (1 pouce) des conduits de ventilation du panneau avant et à moins
de 30,5 cm (12 pouces) de l’arrière de l’unité.
Vorsicht
Zur Vermeidung einer Überhitzung der Geräteschaltkreise sollten Sie keine
Gegenstände auf dem Gerät plazieren. Zu den Entlüftungsöffnungen der
Vorderabdeckung sollte ein Abstand von 2,5 cm und zur Rückseite des Gerätes
von 30,5 cm eingehalten werden.
Preparation and Unpacking
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Unpacking
Unpacking
Introduction
The PathBuilder S24x, 26x, and 27x switch’s printed circuit cards and other internal
components are installed in the enclosure before the unit is shipped from the factory.
In addition to the enclosure and its components, you may find within the shipping
carton a sleeve containing the power cord (if appropriate for your installation).
Checking the
Equipment
Thoroughly check the cartons and their contents for damage in shipment.
If damage has occurred, contact the shipping agent.
Next, lift the unit from the shipping carton and remove the foam packing material.
Direct any questions about missing parts to your 3Com representative.
2-4
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The PathBuilder S24x, 26x, and 27x Switch Rackmount Kit
The PathBuilder S24x, 26x, and 27x Switch Rackmount Kit
Introduction
You can install the PathBuilder S24x, 26x, and 27x switch in a standard Electronics
Industry Association (EIA) 19-inch equipment rack.
EIA Rackmount Kit The PathBuilder S24x, 26x, and 27x switch EIA Rackmount kit contains the
following components:
• One Mounting Shelf
• Two adjustable Rear Mounting brackets for rear rail attachment
• Four Phillips-head 10-32 x .38 long screws with integral lock washers
• Eight Phillips-head 12-24 x.50 long screws for front and rear rail attachment
• Three longer #6 screws
When Checking the Be aware of the following issues when checking the components of your rackmount
EIA Rackmount Kit kit:
• The Mounting Shelf and adjustable Rear Mounting brackets ship fastened
together at the Mounting bracket’s front-most adjustment hole. This prevents
damage during shipping. Disassemble these components prior to installation.
• The four Phillips-head 10-32 x .38 long screws ship in holes securing the
Mounting Shelf to the Rear Mounting brackets. Remove them to separate the
shelf and brackets.
• The eight Phillips-head 12-24 x .50 long screws ship in a small plastic bag.
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The PathBuilder S24x, 26x, and 27x Switch Rackmount Kit
Rackmount Kit
Parts
Figure 2-1 shows the components of the rackmount kit.
10-32 x .38
Screws with External
Lock Washers (4)
Mounting Shelf
Adjustable
Rear Mounting
Bracket (2)
Figure 2-1. The PathBuilder S24x, 26x, and 27x Switch Rackmount Kit
Placement
Considerations
Consider the following issues when installing your PathBuilder S24x, 26x, and 27x
switch in an equipment rack:
Space
A PathBuilder S24x, 26x, and 27x switch and EIA rackmount assembly occupies 7.0
inches, or 4 U NEMA rack space increments.
Power
Allow enough room behind the EIA equipment rack to connect the power cord and
devices. Refer to this manual for maximum power load, when connecting to a 15
amp internal convenience power outlet strip.
Thermal
For proper ventilation, do not cover air vents at the rear of the unit. Where a front
door is present on a rackmount cabinet, installation of the PathBuilder S24x, 26x,
and 27x switch must allow a 2-inch clearance between the door and the PathBuilder
S24x, 26x, and 27x switch air inlet to provide sufficient air flow.
Stability
When installing the PathBuilder S24x, 26x, and 27x switch in a non-3Com cabinet or
with other vendors’ equipment, the PathBuilder S24x, 26x, and 27x switch should be
positioned so that the resulting system rack remains stable during installation on a
10-degree ramp or when 56 pounds of force is applied to the top of the cabinet.
2-6
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The PathBuilder S24x, 26x, and 27x Switch Rackmount Kit
Preparation and Unpacking
2-7
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Installing the PathBuilder S24x, 26x, and 27x Switch in an Equipment Rack
Installing the PathBuilder S24x, 26x, and 27x Switch in an
Equipment Rack
How to...
Follow these steps to install the PathBuilder S24x, 26x, and 27x switch in an
equipment rack:
Step
Action
Description
1
Remove the plastic pedestal base
that is attached to the PathBuilder Phillips-head screws coming up
The base is attached by four
S24x, 26x, and 27x switch.
from the bottom, as shown in
2
3
Insert the Mounting Shelf to the
desired location in the equipment
rack and secure it to the front using
four 12-24 x .50 long screws.
See Figure 2-3, A.
Fasten the adjustable Rear
Mounting brackets at each side of
the rear of the equipment rack. Use
the remaining four 12-24 x.50 long
screws.
See Figure 2-3, B.
When installed correctly, the Rear
Mounting brackets are on the
outside of the mounting shelf.
4
Bolt the Mounting Shelf to the
Rear Mounting brackets using the
four 10-32 x .38 long screws, two
to each side.
See Figure 2-3, C.
To do this, insert the screws from
inside the equipment rack, through
the Mounting Shelf slot, and
through the appropriate adjustment
hole in the Rear Mounting bracket.
5
the PathBuilder S24x, 26x, and 27x
switch horizontally to your right.
Insert the PathBuilder S24x, 26x,
and 27x switch into the equipment
rack, leaving enough room at the
rear to remove the three case-
fastening screws along the new
“bottom” of the unit.
2-8
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Installing the PathBuilder S24x, 26x, and 27x Switch in an Equipment Rack
Step
Action
Description
6
Remove the long (#6) screws.
Then, slide the PathBuilder S24x, 27x switch is now securely
The PathBuilder S24x, 26x, and
26x, and 27x switch flush against attached to the equipment rack and
the rear flange of the Mounting
Shelf and reinsert the screws
through the flange and into the
unit’s case.
ready for connection to devices and
power.
Note
The unit is now accessible mainly
from the front and will require
complete removal from the rack to
perform maintenance routines.
Preparation and Unpacking
2-9
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Installing the PathBuilder S24x, 26x, and 27x Switch in an Equipment Rack
Removing the
Pedestal Base
Figure 2-2 shows how to remove the pedestal base from the PathBuilder S24x, 26x,
and 27x switch.
®
Remove the pedestal
base by removing the
four Phillips-head
screws from the bottom.
PathBuilder S24x, 26x, and
Figure 2-2. Pedestal Base Removal of the
27x Switch
2-10
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Installing the PathBuilder S24x, 26x, and 27x Switch in an Equipment Rack
Steps for
Figure 2-3 shows the steps for rackmount assembly.
Rackmount
Assembly
Equipment Rack Rail
Adjustable Rear Mounting bracket
Bolt the Mounting Shelf to the Rear Mounting
Brackets using the four 10-32 x .38 screws supplied
C
with the kit. Do this by inserting the screws from
inside the rack, through the Mounting Shelf slot, and
through the appropriate hole in the
Rear Mounting bracket.
10-32 x .38
Screws
Mounting Shelf
Fasten the adjustable Rear Mounting brackets
to each side of the equipment rack using four
12-24 x .50 screws.
B
A
Insert the Mounting Shelf in the desired
location and secure it to the front rail using
four 12-24 x .50 screws supplied with your
equipment rack.
Figure 2-3. PathBuilder S24x, 26x, and 27x Switch Rackmount Assem-
bly
Preparation and Unpacking
2-11
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Installing the PathBuilder S24x, 26x, and 27x Switch in an Equipment Rack
Installing the PathBuilder S24x, 26x, and 27x Switch
Figure 2-4 shows the installation of the PathBuilder S24x, 26x, and 27x switch in the
rackmount assembly.
PathBuilder S24x, 26x, and 27x switch
(Rear View)
Mounting Shelf
Remove the three case-fastening screws
off the left rear (new bottom) of
PathBuilder S24x, 26x, and 27x
switch.
A
Slide the PathBuilder S24x, 26x, and 27x
switch flush against rear mounting rail and
reinsert long screws through rail and into
machine’s case.
B
Note: Attached Rear Mounting brackets
are not shown in this figure.
Figure 2-4. Installing the PathBuilder S24x, 26x, and 27x Switch in Rack-
mount Assembly
2-12
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Chapter 3
PathBuilder S24x, 26x, and 27x Switch Hardware
Installation
Overview
Introduction
This chapter contains procedures for installing PathBuilder S24x, 26x, and 27x
switch hardware components.
The following warnings and cautions apply to all procedures described in this
chapter:
Caution
Ports that are capable of connecting to other apparatus are defined as Safe Extra
Load Voltage (SELV). To ensure conformity with EN60950, ensure that these ports
are only connected to ports of the same type of apparatus.
Mise en Garde
Les ports qui sont susceptibles d’être connectés à des équipements sont désignés
comme TBTS. Pour garantir la conformité à la norme EN 60950, n’interconnecte ces
ports qu’avec des ports du même type sur des autres matériels.
Vorsicht
Anschlusse, die mit anderen Geräten verbindet werden können, sind als SELV
beschrieben. Um Konformität mit EN 60950 zu versichern, sichern Sie es, daB diese
Anschlusse nur mit den des selben Type auf anderen Geräten verbindet werden.
Caution
The socket-outlet shall be installed near the equipment and shall be easily accessible.
Mise en Garde
Pour mettre hors tension l’appareil debrancher la prise électrique. La prise électrique
doit être située a proximité de l’équipement et elle doit être d’accès facile.
Vorsicht
Die Steckdose soll nahliegend der Einrichtung installiert werden und leicht
erreichbar sein.
Warning
Only qualified service personnel should perform the procedure described in this
section. Use of this procedure by unqualified personnel could result in personal
injury or equipment damage, and could jeopardize your warranty and maintenance
agreement.
PathBuilder S24x, 26x, and 27x Switch Hardware Installation
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Avertissement
Seules des personnes qualifiées peuvent mettre en pratique les procédures
décrites dans cette section. Dans le cas contraire, des risques de blessures ou
d’endommagement du matériel sont possibles, ce qui pourrait annuler votre
garantie et votre contrat de maintenance.
Warnung
Die in diesem Abschnit aufgeführten Vorgänge sollten ausschließlich von
geschultem und qualifiziertem Servicepersonal durchgeführt werden. Wenn diese
Vorgänge von unqualifiziertem Personal durchgeführt werden, kann dies zu
Personenschäden oder einer Beschädigung des Gerätes führen und darüber hinaus
Ihren Anspruch auf Garantieleistung und Kundendienst gefährden.
Caution
Some components used in the PathBuilder S24x, 26x, and 27x switch are sensitive to
static electric discharges; static electric discharges can cause damage to internal
components. Use proper handling and grounding precautions whenever handling
cards and components.
Mise en Garde
Certains composants du PathBuilder S24x, 26x, and 27x switch sont sensibles aux
décharges électrostatiques qui peuvent les endommager. Prenez les dispositions et
précautions de mise à la terre nécessaires lors de la manipulation de cartes et de
composants.
Vorsicht
Einige im PathBuilder S24x, 26x, and 27x switch verwendeten Komponenten sollten
keinen elektrostatischen Entladungen ausgesetzt werden, durch die interne Bauteile
beschädigt werden können. Wenden Sie die entsprechenden Maßnahmen zur Erdung
und zum Schutz vor statischen Ladungen bei der Handhabung von Karten und
Komponenten an.
3-2
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Setting DIP Switches
Setting DIP Switches
Introduction
This section explains how to set the DIP switches for the motherboard and the Serial
Data Board (SDB) card.
Motherboard
Components
Figure 3-1 is an illustration of the PathBuilder S24x, 26x, and 27x switch
motherboard showing the location of the switches.
Port 1
Port 2
Port 3
Port 4
Port 6
1
2
3
4
5
6
7
8
Port 1
Port 2
DIMs
Switch 2
Switch 1
Figure 3-1. Switch Blocks on Motherboard
Motherboard
Switches 1 and 2
These are the settings for motherboard switch 1 (port 1) and switch 2 (port 2). Refer
to Figure 3-1.
Switch Settings for Motherboard Switches 1 and 2
Set Switch...
1–5
To...
For...
ON
EIA 232-D DIM
6–8
OFF
1–5
6–8
OFF
ON
V.11 and V.35 DIMs
9
ON
ON
Ring Indicator (DCE)
Make Busy (DTE)
10
PathBuilder S24x, 26x, and 27x Switch Hardware Installation
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Installing the DSU DIM
Installing the DSU DIM
Introduction
You can install up to two DSUs for each PathBuilder S24x, 26x, and 27x switch
platform using both Ports 1 and 2.
DSU DIM
Top of Unit
It is important that the
square markings on the DIM
are on the same side as the
round markings on the board.
Port 1
DTE
DCE
DTE
DCE
Port 2
Figure 3-2. DSU DIM Installation
3-4
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Installing the DSU DIM
Install the DSU DIM Perform these steps to install the DSU DIM:
Step
Action
Result/Description
1
Install the DSU DIM in the DTE
The DSU option does not operate
if the DIM is installed in the DCE
position.
2
3
Set the switches properly. Refer to
Plug the EIM into the backplane
connector corresponding to the
DIM port containing the DSU
DIM (Port 1 or 2). Verify that the
EIM is only connected to a port
that has a DSU DIM installed.
4
Tighten the connector mounting
screws to provide proper
grounding and to ensure signal
integrity.
Caution
Be sure that the telephone company plug is disconnected before you disconnect the
EIM from the PathBuilder S24x, 26x, and 27x switch. Also, do not connect the
telephone company plug to the EIM until you have connected the EIM to the
PathBuilder S24x, 26x, and 27x switch.
Mise en Garde
Assurez-vous que la prise de téléphone est débranchée avant de déconnecter le
module d’interface externe (EIM) du PathBuilder S24x, 26x, and 27x switch. Ne la
rebranchez pas au EIM avant d’avoir reconnecté le module au PathBuilder S24x,
26x, and 27x switch.
Vorsicht
Das Telefonkabel muß ausgesteckt sein, bevor Sie die Verbindung zwischen dem
EIM und dem PathBuilder S24x, 26x, and 27x switch trennen. Schließen Sie das
Telefonkabel erst dann wieder in das EIM an, wenn Sie die Verbindung zwischen
EIM und PathBuilder S24x, 26x, and 27x switch wiederhergestellt haben.
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Installing the DSU DIM
Switch Blocks 1
and 2
The PathBuilder S24x, 26x, and 27x switch Integral DSU option requires that you
set the same switches in the switch blocks as you do for the V.35, V.36, and X.21
interfaces.
These are the switch settings for the motherboard switches 1 and 2.
Switch Settings
Set Switch...
To....
For...
1-5
6-8
OFF
ON
V.11, V.35, V.36 DIMs, and the
PathBuilder S24x, 26x, and 27x
switch Integral DSU option
Note
There is no indication when the motherboard switches do not match the type of
DIM being used. When replacing DIMs, be sure that the motherboard switches
are set correctly for the particular DIM being installed.
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Configuring the PathBuilder S24x, 26x, and 27x Switch for DSU Operation
Configuring the PathBuilder S24x, 26x, and 27x Switch for DSU
Operation
Configuration
Procedure
Perform these steps from the CTP to configure the PathBuilder S24x, 26x, and 27x
switch for DSU operation:
Step
Action
1
Refer to the PathBuilder S200 Series Basic Protocols. However, you do
not need to complete these configuration parameters:
• Clock Speed
• Connection Type
• Port Control
2
Configure the clock source parameter under port configuration as
follows:
INT
Use this parameter when providing
clock to the network.
EXT
Use this parameter when using the
network-provided clock
(usual mode for DSU operation).
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DSU Input and Output Signaling
DSU Input and Output Signaling
Introduction
Input Signals
Input and output signaling information is useful as a debugging tool and replaces the
EIA summary information associated with other DIM types.
This table describes the input signals.
NIS
Not In Service
This signal is normally low (L). If no signal is received, or the DSU
option is in DSU Loopback mode, or if idle codes are received, NIS is
listed as high (H). This signal is used to determine if the other end of the
connection is available.
BPV
Bipolar Violation
This signal is “H” during normal operation. When the signal is “L,” it
indicates that some type of bipolar violation was received by the DSU
option. The signal toggles during a DSU loopback condition.
DL
C+
C-
DSU Loopback
This signal is normally “H.” An “L” indicates that a DSU loopback
mode is entered.
Positive Sealing Current*
This signal is “H” if the DC current on the telephone company interface
is not in the positive direction.
Negative Sealing Current*
This signal is “H” if the DC current on the telephone company interface
is not in the negative direction. An “L” indicates that the DSU option
has detected a negative “sealing” current and is therefore performing a
CSU loopback.
Note
When both C+ and C- are “H”, it indicates that no sealing current exists. This is
often the case when connected to other DSU type hardware. Normally, the signal
for C+ is “L” when connected to central office equipment (OCU hardware).
Output Signals
Although you cannot directly access the output signals, they are manipulated by the
DSU option software and may be useful for informational purposes. The following
table describes the output signals.
Signal
RS
Description
Reset
This output resets the DSU option hardware. Its normal operating state
is “H”.
LL
Local Loopback
When this signal is “L”, the DSU hardware is locally looping data back
to the PathBuilder S24x, 26x, and 27x switch hardware by way of the
EIM.
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DSU Input and Output Signaling
Signal
CL
Description (continued)
CSU Loopback
When this signal is “L”, the DSU hardware is looping the remote
connection's receive to transmit.
IDL
Idle
An “H” on this signal tells the DSU hardware to send idle bipolar
violations to the remote system.
CLK
Clock Mode
The signal “H” denotes the use of the network clock. The DSU option
provides the clock when this signal is “L”.
You can view these signals using the control terminal Monitor menu item on the
Main menu.
Other Reporting
Differences
Other differences in control terminal output are:
• Detailed Port Statistics— show DSU input and output signaling as well as
note the installed DSU DIM
• Detailed Node Statistics— show DSU DIM position
Example of
Figure 3-3 shows the Diagnostics menu. Use this menu to access the loopback
Diagnostics Menu options described in the next section.
Node: nodename
Menu: Diagnostics
Address (blank)Date: ___________Time:__________
Path: (Main.12)
1. Local Loopback
2. V.54 Loopback 2
3. V.54 Loopback 3
4. Fatal Error Reports
5. Logged Alarms«
6. Startup Diagnostics
7. DSU Internal Loopback
8. DSU Internal and External Loopback
9. Start Delay Measurement
10. Stop Delay Measurement
11. Display Delay Summary
12. IP Ping
#Enter Selection:
Figure 3-3. Diagnostics Menu
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DSU Input and Output Signaling
Control Terminal
These are the control terminal loopback options.
Loopback Options
DSU Internal Loopback This loopback mode does not affect the external
interface but it does loop the local transmit data back to
the receive data within the EIM. This test is useful for
verifying that the EIM is connected and is working
properly from a digital integrity perspective.
DSU Internal and
External loopback
This loopback mode performs the internal loopback
mentioned above along with looping the external
transmit to the external receive to allow manual testing
of the remote interface.
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Troubleshooting DSU Installation
Troubleshooting DSU Installation
Introduction
Some potential DSU installation problems are:
• Improper port connection of the EIM.
• Improper telephone company interface connection.
• The DSU DIM is not connected in DTE configuration.
• The motherboard switches are not in the proper positions.
• The DSU option Software is not operational.
• The DSU port clock source option is not correct.
• No signal from the telephone company interface.
CTP
Troubleshooting
The following information, available from the control terminal, can help you
troubleshoot.
Node Statistics
Port Statistics
Used to verify that the software version contains the DSU
option modifications. It also indicates if the DSU DIM is
recognized by the software.
Used to verify that data is sent without error. Error counts
may denote an error in clocking mode configuration. Port
statistics also indicate if the software recognizes the DSU
DIM.
Monitor
Input and output signals determine if the DSU option is in
a loopback mode requested by the remote end. This would
explain the inability to send data. Continuous bipolar
violations also indicate that the remote system is out of
service.
DSU Internal
Loopback
Failure of this loopback mode indicates that the EIM
module is not connected.
If Problems Arise
If any of your equipment is operating incorrectly, immediately remove it from the
Installing the DSU telephone line before it harms your network. If the telephone company notes the
problem, they may temporarily disconnect your service. They will notify you in
advance of the disconnection, when possible. If advance notification is not feasible,
you will be notified as soon as possible. When you are notified, you will be given the
chance to correct the problem and be informed of your right to file a complaint with
the FCC.
If the PathBuilder S24x, 26x, and 27x switch Integral DSU needs repair, 3Com or an
authorized representative of 3Com can repair it. For information, contact 3Com
Technical Support at 1 800 NET 3Com (1 800 638 3266).
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Installing DIMs
Installing DIMs
Introduction
There are two Data Interface Modules (DIMs) on both the PathBuilder S24x, 26x,
and 27x switch motherboard. Each DIM is a 64-pin, dual in-line module that can be
repositioned so that Ports 1 or 2 act as either DCE or DTE ports. One DIM
corresponds to Port 1 and the other to Port 2.
The DIMs on the motherboard are factory set in the DTE position.
Example
Figure 3-4 shows an example of installing a DIM.
Motherboard
Port 1
Port 2
DIMs
Port 1
DTE
DCE
Port 2
Figure 3-4. Installing a DIM
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Installing DIMs
Installing a DIM
To install the DIM, insert it into the desired DTE or DCE location. Be sure the pins
are seated firmly in the sockets and are not bent.
Caution
Some components used in the PathBuilder S24x, 26x, and 27x switch are sensitive to
static electric discharges; static electric discharges can cause damage to internal
components. Use proper handling and grounding precautions whenever handling
cards and components.
Mise en Garde
Certains composants du PathBuilder S24x, 26x, and 27x switch sont sensibles aux
décharges électrostatiques qui peuvent les endommager. Prenez les dispositions et
précautions de mise à la terre nécessaires lors de la manipulation de cartes et de
composants.
Vorsicht
Einige im PathBuilder S24x, 26x, and 27x switch verwendeten Komponenten sollten
keinen elektrostatischen Entladungen ausgesetzt werden, durch die interne Bauteile
beschädigt werden können. Wenden Sie die entsprechenden Maßnahmen zur Erdung
und zum Schutz vor statischen Ladungen bei der Handhabung von Karten und
Komponenten an.
Removing a DIM
not bend the pins during removal.
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Installing SIMMs
Installing SIMMs
Introduction
This section explains how to install different types of SIMMs on the motherboard.
• DRAM: There are two types of DRAM:
- Global DRAM: This is memory that is accessible by all the boards in the
PathBuilder S24x, 26x, and 27x switch.
- Processor DRAM: This is memory dedicated to the PathBuilder S24x, 26x,
and 27x switch’s processor.
The PathBuilder S24x, 26x, and 27x switch motherboard comes with 8 Mbytes of
Processor DRAM and 4 Mbytes of Global DRAM. You can add additional DRAM
for a total of 8 Mbytes of Global and 16 Mbytes of Processor DRAM.
• FLASH: This is nonvolatile read/write memory.
• CMEM: This is nonvolatile (battery backed-up) configuration memory. This
is where the real time clock is located.
• Data Compression: This is optional SIMM that is used for data compression
functions.
Caution
Some components used in the PathBuilder S24x, 26x, and 27x switch are sensitive to
static electric discharges; static electric discharges can cause damage to internal
components. Use proper handling and grounding precautions whenever handling
cards and components.
Mise en Garde
Certains composants du PathBuilder S24x, 26x, and 27x switch sont sensibles aux
décharges électrostatiques qui peuvent les endommager. Prenez les dispositions et
précautions de mise à la terre nécessaires lors de la manipulation de cartes et de
composants.
Vorsicht
Einige im PathBuilder S24x, 26x, and 27x switch verwendeten Komponenten sollten
keinen elektrostatischen Entladungen ausgesetzt werden, durch die interne Bauteile
beschädigt werden können. Wenden Sie die entsprechenden Maßnahmen zur Erdung
und zum Schutz vor statischen Ladungen bei der Handhabung von Karten und
Komponenten an.
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Installing SIMMs
SIMM Location
Figure 3-5 shows the location of the Single In-line Memory Module (SIMM) slots on
the PathBuilder S24x, 26x, and 27x switch motherboard.
Insert SIMM into socket at a slight angle.
Data Compression SIMM
Optional Flash SIMM
Locking Tabs
DRAM
Processor
Slots
CMEM SIMM Slot
FLASH
Optional FLASH
CMEM
Data Compression
SIMMs
Global DRAM
SIMM Slot
Motherboard
Figure 3-5. Installing SIMMs
Installing a SIMM
Perform these steps to install the SIMM:
Step
Action
1
2
3
Insert the SIMM at a slight angle as shown in Figure 3-5.
Snap the SIMM into the vertical position.
Be sure it locks in place with the locking tabs in a vertical position.
Removing a SIMM When removing a SIMM, gently disengage locking tabs and lift out the SIMM.
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Installing I/O Cards
Installing I/O Cards
Introduction
These PathBuilder S24x, 26x, and 27x switch I/O cards are installed into slots 1
through 8:
• Serial Data Board (SDB)
• BRI
• Hub
The Modem card can only be installed into slot 1.
Installing an I/O
Card
Perform these steps to install any of the I/O cards:
Step
Action
1
2
3
Align the card and the appropriate slot.
Insert the card, making the proper connection on the motherboard.
Fasten each card with a single holding screw to the rear of the
PathBuilder S24x, 26x, and 27x switch chassis.
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Installing a T1 or E1 Dual Port Digital PBX Interface Card
Installing a T1 or E1 Dual Port Digital PBX Interface Card
Introduction
This section provides installation instructions for the T1 or E1 dual port digital PBX
interface card for the PathBuilder S24x, 26x, and 27x switch. It also provides a
section on installing a T1/CSU Daughter card onto the T1 Dual Port Card.
Slot Restriction
One T1 or E1 dual port digital PBX interface card may only be installed in expansion
slot 8 in the PathBuilder S24x, 26x, and 27x switch.
Installation
Procedure
Follow these steps to install a T1 or E1 dual port digital PBX interface card.
Caution
Observe antistatic precautions whenever handling interface cards to avoid
damaging sensitive components. Wear a ground strap connected to a grounded
equipment frame whenever handling the interface card; always transport the card
in an antistatic bag.
Mise en Garde
Prenez des précautions antistatiques lors de la manipulation des cartes d’interface
afin de ne pas endommager les composants sensibles. Portez une bande de mise à la
masse raccordée à un équipement mis à la terre lors de la manipulation d’une carte
d’interface, transportez-la toujours dans un sac antistatique.
Bitte beachten Sie bei der Handhabung der Schnittstellenkarten die
Vorsichtsmaßnahmen zur Antistatik, um anfällige Bauteile vor Beschädigungen
zu schützen. Tragen Sie einen Schutzerdungsleiter, der mit einem geerdeten
Gerätegehäuse verbunden ist, wenn Sie die Schnittstellenkarte berühren.
Transportieren Sie die Karte immer in einer antistatischen Hülle.
Warning
Do not attempt to install the interface card while the PathBuilder S24x, 26x, and 27x
switch is running.
Avertissement
Ne tentez pas d’installer une carte d’interface lorsque le PathBuilder S24x, 26x, and
27x switch fonctionne.
Warnung
Versuchen Sie nicht, die Schnittstellenkarte während des Betriebs des PathBuilder
S24x, 26x, and 27x switch
zu installieren.
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Installing a T1 or E1 Dual Port Digital PBX Interface Card
Step
Action
1
2
3
Place the interface card on an antistatic mat.
Set the I/O base address for the card using the DIP switches at SW1.
Power down the PathBuilder S200 series switch by unplugging the AC
power plug.
4
5
6
Remove the cover from the PathBuilder S24x, 26x, and 27x switch as
shown in Figure 4-1 on page 4-4.
Use expansion slot 8. If necessary, unfasten the bracket screw and
remove the bracket that covers the chassis opening for slot 8.
Holding the interface card by the rear bracket and board edges, gently
insert the card into expansion slot 8, aligning the card with the card
guides and making proper connection on the motherboard. Ensure that
the card is seated securely in the expansion slot.
7
8
Secure the card to the chassis using the bracket screw.
Connect the 40-pin MVIP ribbon cable to the Multi-Vendor Integration
Protocol interface on the top edge of the digital PBX interface card by
snapping it so that the tabs match.
9
Connect the other end of the 40-pin MVIP ribbon cable to the
appropriate DSPM/SM cards’ MVIP connector by snapping it so that
the tabs match.
10
11
Replace the PathBuilder S24x, 26x, and 27x switch cover.
Connect the spans to the connectors on the digital PBX interface card
rear bracket.
12
Plug the AC power cord in.
Result: The LEDs on the rear bracket remain off until the card is reset
and the software is downloaded. after the download is complete, the
green RUN LED remains on.
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Installing a T1 or E1 Dual Port Digital PBX Interface Card
Installing the T1/CSU Daughter Card
Introduction
This section explains how to install a T1/CSU Daughter Card onto a T1 Dual Port
Card.
When installing the T1/CSU card be certain that the T1 Dual Port card is not next to
an FXO, FXS, or E&M card. Because these cards have components on both sides,
they might come in contact with the T1/CSU card, damaging both cards.
Caution
Observe antistatic precautions whenever handling interface cards to avoid
damaging sensitive components. Wear a ground strap connected to a grounded
equipment frame whenever handling the interface card; always transport the card
in an antistatic bag.
Mise en Garde
Prenez des précautions antistatiques lors de la manipulation des cartes d’interface
afin de ne pas endommager les composants sensibles. Portez une bande de mise à la
masse raccordée à un équipement mis à la terre lors de la manipulation d’une carte
d’interface, transportez-la toujours dans un sac antistatique.
Vorsicht
Bitte beachten Sie bei der Handhabung der Schnittstellenkarten die
Vorsichtsmaßnahmen zur Antistatik, um anfällige Bauteile vor Beschädigungen
zu schützen. Tragen Sie einen Schutzerdungsleiter, der mit einem geerdeten
Gerätegehäuse verbunden ist, wenn Sie die Schnittstellenkarte berühren.
Transportieren Sie die Karte immer in einer antistatischen Hülle.
Warning
Do not attempt to install the interface card while the PathBuilder S24x, 26x, and 27x
switch is running.
Avertissement
Ne tentez pas d’installer une carte d’interface lorsque le PathBuilder S24x, 26x, and
27x switch fonctionne.
Warnung
Versuchen Sie nicht, die Schnittstellenkarte während des Betriebs des PathBuilder
S24x, 26x, and 27x switch zu installieren.
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Installing a T1 or E1 Dual Port Digital PBX Interface Card
Installation
Procedure
Follow these steps to install the T1/CSU Daughter card.
Step
Action
1
Power down the PathBuilder S200 series switch by unplugging the AC
power plug.
2
3
Remove the cables from the rear of the T1 Dual Port Interface card.
Remove the cover from the PathBuilder S24x, 26x, and 27x switch as
shown in Figure 4-1 on page 4-4.
4
Use a screw driver to loosen the bracket screw and remove the T1 Dual
Interface card.
5
6
Place the card on an antistatic mat.
The upper connectors support Port 49 and the lower connectors support
Port 50.
7
8
9
Using a pair of long-nose pliers or a small screw driver, remove the
small jumpers from the connectors.
Carefully insert the T1/CSU Daughter Card(s) into the pin connectors.
Ensure that the card is seated securely.
Insert the T1 Dual Port card into expansion slot 8, aligning the card with
the card guides and making proper connection on the motherboard.
Ensure that the card is seated securely.
10
11
12
13
Secure the card to the chassis using the bracket screw.
Replace the PathBuilder S24x, 26x, and 27x switch cover.
Reconnect the cables to the T1 Dual Port card.
Plug in the AC power cord.
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Installing a T1 or E1 Dual Port Digital PBX Interface Card
2
Carefully install Daughtercard
Pins into T1 Dual Port
Interface Connector.
1
Remove Jumper from Socket
Figure 3-6. Installing T1/CSU Daughter Cards
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Cabling the PathBuilder S24x, 26x, and 27x Switch
Cabling the PathBuilder S24x, 26x, and 27x Switch
Introduction
This section describes the connections for:
• Control Terminal Port (CTP)
• I/O Interface cards
• Network Manager
• LAN
• An external power source
CTP Connection
The CTP is set as Port 6 on the rear of the PathBuilder S24x, 26x, and 27x switch. It
is a fixed EIA 232-D DCE interface terminating on a DB-25 connector. No special
cabling is required. Typically, a straight-through DB-25 male to DB-25 male cable is
required for connection to a terminal device.
I/O Interface Port
Connection
Three of the I/O ports on the backplane of the PathBuilder S24x, 26x, and 27x switch
chassis are DB-25 female connectors. One of the I/O ports is a DB-15 female
connector. You do not need additional cables if the DIM-based ports (Ports 1 and 2)
have EIA 232-D DIMs installed.
Network Manager
Connection
The PathBuilder S24x, 26x, and 27x switch supports direct manager connection
using the CTP. There is a serial interface connection for the SNMP manager. You can
attach the control terminal to any asynchronous PAD port.
LAN Connection
You can connect a PathBuilder S24x, 26x, and 27x switch to a LAN with a router.
The router can be either an external router connected to a PathBuilder S24x, 26x, and
27x switch using a Frame Relay connection or a PathBuilder S200 series switch
internal router. For more LAN connection information, refer to Appendix A,
Appendix.
Procedure
Follow these steps to connect to an external power source:
Step
Action
Result/Description
1
Verify that the 115/230 VAC Switch on Be sure that the AC power
the rear panel is set for the specific
country’s requirements.
cord meets requirements for
the country of use.
2
If you are using an AC power supply, The PathBuilder S24x, 26x,
connect the power cord to the back of and 27x switch unit automati-
the PathBuilder S24x, 26x, and 27x
switch enclosure and then to the
appropriate power source.
cally powers on and runs self-
diagnostics.
If you are using a -48VDC input power
supply, verify correct polarity with a
Volt meter.
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Installing the Transceiver
Installing the Transceiver
Introduction
The transceiver mounts to the DB-15 AUI connector of the Ethernet LAN card or to
the DB-15 AUI connector on the back panel. The Thin-Net BNC connector provides
subsequent interface to the coaxial network.
The SQE can be turned ON and OFF by setting a switch on the side of the housing.
Note
The transceiver is shipped with the SQE set to the OFF position.
Transceiver
Illustration
Figure 3-7 shows a transceiver.
Thin-NET BNC Connector
15-Pin D-Type Connector
SQE Switch
Figure 3-7. Transceiver
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Power-Up Diagnostics/Verification
Power-Up Diagnostics/Verification
Introduction
Diagnostics run when a node is powered up. Basic tests are run from PROM and
more extensive diagnostics are run during startup.
If the node detects a lack of software, it sends a message to the CTP. The yellow LED
lights and a 2-digit code is displayed. You must initiate a software coldload if
needed.
Power Up
Sequence
This is the power-up sequence.
Function
Description
ROM-based diagnostics
Local core self-tests. Boots PROM
checksum, MPU test, Program RAM test.
FLASH verification
Checksum FLASH image.
Loads RAM diagnostics
Uncompresses FLASH diagnostics image
to RAM and executes.
RAM-based diagnostics
Tests I/O cards and everything else on card.
Loads RAM operational
software
Uncompresses FLASH operational
software image to RAM and executes.
Verifies Config database
Verifies resident CMEM database.
Node Restarts
The three types of restarts are:
• Coldstart
• Warmstart
• Default Node
Node Coldstart
Node Warmstart
A node coldstart is similar to a power-up. It follows the power-up sequence except
that it is initiated when the operator presses the RESET button on the front panel or
when certain software faults occur. All calls are cleared along with Event queues. A
Node coldstart loads only configuration memory.
A node warmstart can be initiated by a software fault or an operator command. It is
identical to a coldstart except for the following:
• No diagnostic testing is performed.
• Code downloads are not performed unless necessary.
• Event logs are not erased.
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Power-Up Diagnostics/Verification
Default Node
Command
A default node command is the same as a warmstart, except it is only initiated by the
operator. The Current configuration bank in nonvolatile CMEM memory is erased
and replaced by the system default configuration.
Setting Node to
Default
You can set a node to the default configuration by choosing the Default Node
selection from the CTP Main menu.
Configuration
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Installing Software Options
Installing Software Options
Introduction
The PathBuilder S24x, 26x, and 27x switch contains all the software options
available for the current release of the product. In some cases, the options have
already been enabled. However, in other cases, the option you want to use needs to
be enabled. Refer to the latest Software Release Notice for more information.
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Full Mesh Cluster Cabling
Full Mesh Cluster Cabling
Introduction
Usage
This section explains some of the important points to keep in mind when using your
PathBuilder S24x, 26x, and 27x switches in a full mesh cluster configuration.
A full mesh application uses standard networking ports on the PathBuilder S24x,
26x, and 27x switch (ports 1, 2, and 3) and standard networking protocols
appropriate for your application (X.25, Voice Relay, etc.). All networking services
are available to the circuits between the clustered nodes.
Configuring
When configuring a full mesh application, remember that each node must be
configured individually. Ports 1, 2, and 3 on each PathBuilder S24x, 26x, and 27x
switch will appear normally on the Port Record. The parameter Clock Speed and the
appropriate clock mode (Int, Ext, etc.) should be set depending on the DIM position
and speed. Clock speeds up to 2.048 Mbps are supported.
Cables
Ports
When cabling PathBuilder S200 series switch in a mesh application, use DB25 male
to DB25 male straight-through cables.
To use your PathBuilder S24x, 26x, and 27x switch in a full mesh cluster, note that:
• Ports 1, 2, and 3 on all four nodes are for the mesh connections.
• Port 3 is always a DTE port (V.36 electrical).
• Ports 1 and 2 can be either DCE or DTE ports. This is determined by the way
section earlier in this chapter.
PathBuilder S24x, 26x, and 27x Switch Hardware Installation
3-27
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Full Mesh Cluster Cabling
Mesh Diagram
Figure 3-8 shows how a full mesh application is cabled.
PB S200 (Rear View)
Port 1 (T)
Port 2 (T)
PB S200 (Rear View)
Port 3 (T)
Port 1 (C)
PB S200 (Rear View)
Port 2 (C)
Port 3 (T)
Port 1 (C)
PB S200
(Rear View)
T =DTE Port
C=DCE Port
Port 2 (C)
Port 3 (T)
Port 1 (C)
Port 2 (C)
Port 3 (T)
Figure 3-8. Mesh Diagram
3-28
PathBuilder S24x, 26x, and 27x Switch Hardware Installation
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Chapter 4
Maintenance
Overview
Introduction
This chapter contains procedures to remove/replace the PathBuilder S24x, 26x, and
27x switch components.
Warning
Only trained, qualified technicians should perform procedures outlined in this
manual. 3Com PathBuilder S200 series switch daughtercards and DIMs are sensitive
to static discharge, which can damage components. Trained, qualified technicians
will use proper handling and grounding precautions when handling a 3Com
PathBuilder S200 series switch daughtercard or DIM.
Avertissement
Seuls des techniciens qualifiés doivent mettre en pratique les procédures décrites
dans ce manuel. Les cartes fille 3Com PathBuilder S200 series switch et les DIM
sont sensibles aux décharges statiques qui peuvent endommager les composants. Les
techniciens formés et qualifiés prendront les dispositions et précautions de mise à la
terre nécessaires lors de la manipulation de cartes fille 3Com PathBuilder S200
series switch et de DIM.
Warnung
Die in diesem Handbuch aufgeführten Vorgänge sollten ausschließlich von
geschulten und qualifizierten Technikern durchgeführt werden. Da PathBuilder S200
series switch-Zusatzkarten und DIMs von 3Com keinen statischen Entladungen
ausgesetzt werden sollten, da Komponenten beschädigt werden können, werden sie
von dem qualifizierten technischen Personal mit den entsprechenden Maßnahmen
zur Erdung und zum Schutz vor statischen Ladungen gehandhabt.
Caution
Some components used in the PathBuilder S24x, 26x, and 27x switch are sensitive to
static electric discharges; static electric discharges can cause damage to internal
components. Use proper handling and grounding precautions whenever handling
cards and components.
Mise en Garde
Certains composants du PathBuilder S24x, 26x, and 27x switch sont sensibles aux
décharges électrostatiques qui peuvent les endommager. Prenez les dispositions et
précautions de mise à la terre nécessaires lors de la manipulation de cartes et de
composants.
Maintenance
4-1
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Vorsicht
Einige im PathBuilder S24x, 26x, and 27x switch verwendeten Komponenten sollten
keinen elektrostatischen Entladungen ausgesetzt werden, durch die interne Bauteile
beschädigt werden können. Wenden Sie die entsprechenden Maßnahmen zur Erdung
und zum Schutz vor statischen Ladungen bei der Handhabung von Karten und
Komponenten an.
4-2
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Removing/Replacing Top Cover
Removing/Replacing Top Cover
Introduction
You must remove the top cover to access the motherboard and all I/O cards, the
power supply, and the fan.
Removing the
Cover
Perform these steps to remove the top cover of the PathBuilder S24x, 26x, and 27x
switch:
Step
Action
1
2
3
4
Verify that the power is OFF.
Pull the cover toward the rear of the unit (approximately 1/4 inch).
Lift up to release from the sliding clips.
Note
Be sure not to damage spring clips on chassis.
Maintenance
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Removing/Replacing Top Cover
Example
Figure 4-1 shows an example of removing the top cover of the PathBuilder S24x,
26x, and 27x switch.
Pull cover
1/4-in.
toward rear.
Lift cover.
Remove six screws.
Figure 4-1. Removing the Top Cover
Replace the Cover To replace the top cover, reverse the steps just detailed in “Removing the Cover.”
4-4
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Removing/Replacing Front Panel Cover
Removing/Replacing Front Panel Cover
Introduction
This section describes how to remove the front panel cover. The auxiliary fan is
attached to the front panel cover.
Remove the Front Perform these steps to remove the front panel cover:
Panel Cover
Step
Action
1
2
3
Verify that the power is OFF.
Remove the ribbon cable connecting the LED display card to the
motherboard. The ends of the cable are keyed, simplifying cable
4
While holding onto the front panel cover:
• Pull the top of the front panel cover away from the front of the unit.
• Lift up to disengage from bottom tabs.
Maintenance
4-5
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Removing/Replacing Front Panel Cover
Example
Figure 4-2 shows an example of disconnecting the front panel cover.
Front Panel Cover
Thumbscrew
Ribbon Cable
LED
Display
Card
Auxiliary Fan
Figure 4-2. Removing the Front Panel Cover
4-6
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Removing/Replacing Power Supply
Removing/Replacing Power Supply
Introduction
This section describes how to remove the power supply.
Remove the Power Perform these steps to remove the power supply:
Supply
Step
Action
1
2
3
Verify that the power is OFF by disconnecting the power cord.
At the rear of the unit, remove the four screws attaching the power
4
5
Disconnect the power supply cables (P1 and P2) from the motherboard.
• Remove the two internal screws on the fan assembly.
• Slide the power supply to the front to clear the lip of the chassis.
• Slide it out and away from the unit.
Supply
Supply.” Cables are keyed to aid in reassembly.
To replace the DC power supply, reverse the steps detailed “Removing/Replacing
Power Supply” section on page 4-7 to Step 2. Instead of performing Step 1, verify
that incoming power is disconnected with a volt meter then connect the appropriate
terminal block locations.
Maintenance
4-7
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Removing/Replacing Power Supply
Example
Remove the Two Holding
Screws on Inside and
Slide Power Supply Out
DC Power Supply
Support Bar
Terminal Block
Positive
Wire
®
Negative
Wire
Power Supply Cables
(P1/P2)
Remove the Four
Holding Screws
on the Rear Panel
Figure 4-3. Removing the Power Supply
4-8
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Removing/Replacing PathBuilder S24x, 26x, and 27x Switch Cards
Removing/Replacing PathBuilder S24x, 26x, and 27x Switch Cards
Introduction
This section describes how to remove the PathBuilder S24x, 26x, and 27x switch
cards. The I/O cards are located in seven full-size and one half-size slots on the
motherboard.
Removing an
Follow these steps to remove an expansion card:
Expansion Card
Step
Action
1
2
3
Verify that the power is OFF by removing the power cord.
Unlock the latch at the top of the support bar by turning the latch
counterclockwise 1/4 turn (Figure 4-4 ).
4
5
Pull the support bar out from the chassis.
To remove an expansion card:
• Remove the holding screw that is to the left of the card to be
• Disconnect any external cables attached to the card being removed.
• Gently pull the card away from its connectors and slide the card
out.
Maintenance
4-9
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Removing/Replacing PathBuilder S24x, 26x, and 27x Switch Cards
Example
Figure 4-4 shows an example of removing the support bar.
®
Turn latch
1/4 turn.
Support Latch Bar
Figure 4-4. Removing the Support Bar
4-10
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Removing/Replacing PathBuilder S24x, 26x, and 27x Switch Cards
Example
Figure 4-5 shows an example of removing an expansion card.
Holding Screws
Gently pull card from
connectors and slide it out.
Figure 4-5. Removing an Expansion Card
Replacing a Card
To replace an expansion card, reverse the steps just detailed in “Removing an Expan-
sion Card.” When replacing cards, be sure that the full-size cards are engaged in the
card guides in the front end of the unit
Maintenance
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Replacing PathBuilder S24x, 26x, and 27x Switch Motherboard
Replacing PathBuilder S24x, 26x, and 27x Switch Motherboard
Introduction
You must first remove all the expansion cards in order to gain access to the
motherboard.
Removing the
Motherboard
Perform these steps to remove the motherboard:
Step
Action
1
2
3
4
Verify that the power is OFF by removing the power cord.
Remove the support bar from the chassis.
Remove all cables connected to expansion cards and remove all
expansion cards.
5
6
Disconnect the ribbon cable connecting the LED display card to the
motherboard at the motherboard end.
Disconnect all cables connecting ports 1, 2, 3, 4, and 6 to the
motherboard.
Note
All cable connectors are keyed to ensure proper connection.
7
8
Disconnect the two power supply cables.
On the right side of the unit (toward the backplane):
• Swing the motherboard out and away from the chassis.
• Lift the assembly up and away from its hinges.
4-12
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Replacing PathBuilder S24x, 26x, and 27x Switch Motherboard
Example
Figure 4-6 shows an example of removing the motherboard.
Swing motherboard out
and lift from enclosure.
Remove screws.
Figure 4-6. Removing the Motherboard
Install the
Motherboard
To replace the motherboard, reverse the steps just detailed in “Removing the
Maintenance
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Removing/Replacing the Lithium Battery
Removing/Replacing the Lithium Battery
Introduction
The 3-volt lithium battery on the CMEM card maintains the node’s configuration
memory in the event of a power failure.
Warning
Only qualified service personnel should perform the procedure described in this
section. Use of this procedure by unqualified personnel could result in personal
injury or equipment damage, and could jeopardize your warranty and maintenance
agreement. The danger of explosion exists if the lithium battery is incorrectly
replaced. Replace the battery only with the same or equivalent type recommended by
the manufacturer. Discard used batteries according to the manufacturer’s
instructions.
Avertissement
Il y a danger d'explosion s'il y a remplacement incorrect de la batterie. Remplacer
uniquement avec une batterie du même type ou d'un type équivalent recommandé par
le constructeur. Mettre au rebut les batteries usagées conformément aux instructions
du fabricant.
Warnung
Explosionsgefahr bei unsachgemäßem Austausch der Batterie. Ersatz nur durch
denselben oder einen vom Hersteller empfohlenen ähnlichen Typ. Entsorgung
gebrauchter Batterien nach Angaben des Herstellers.
Replacing the
Battery
Follow these steps to replace the battery:
Step
Action
1
2
3
Power down the PathBuilder S24x, 26x, and 27x switch node.
Remove the CMEM card (refer to Figure 3-2 in Chapter 3).
Slip the battery out from under the spring clip in the upper left-hand
portion of the card, as shown in Figure 4-7 .
4
5
Insert a fresh battery under the spring clip, making sure that the positive
(+) terminal is face up.
IMPORTANT: This procedure will erase the CMEM.
Reinsert the CMEM card.
4-14
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Removing/Replacing the Lithium Battery
Example
Figure 4-7 shows an example of removing the lithium battery.
Figure 4-7. Removing the Lithium Battery
Maintenance
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Removing/Replacing the Lithium Battery
4-16
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Chapter 5
Channelized Data
Overview
What Is It?
The Channelized Data option provides an alternative to using Serial Data Boards
(SDB) to concentrate data traffic from remote nodes attached to the PathBuilder
S24x, 26x, and 27x switch through a multiplexer.
Using one T1 or E1 card installed in a PathBuilder S24x, 26x, and 27x switch,
Channelized Data supports a greater number of port connections between the
PathBuilder S24x, 26x, and 27x switch and remote nodes than allowed is by SDBs.
For example, eight SDB cards installed in the PathBuilder S24x, 26x, and 27x switch
plus three motherboard ports allow a maximum of 19 connections per node, or two
ports per SDB card. With Channelized Data you can make up to 30 connections
using a T1 card or E1 card.
Note
Each E1 or T1 card contains two ports. However, the Channelized Data option
only supports up to 30 configured virtual ports for data traffic. The remaining
virtual ports available on the PathBuilder S24x, 26x, and 27x switch are reserved
for uncompressed voice traffic.
The Channelized Data option is configurable from the Control Terminal Port. See the
“Configuring Channelized Data” section on page 5-3 for details on how to configure
a PathBuilder S200 series switch for channelized data operation.
Statistics and
Alarms
The Channelized Data option uses the standard X.25 and Frame Relay statistics
available for the PathBuilder S200 series switch products family. Refer to the X.25
Configuration Basics Guide for information on statistics.
For details on alarms and reports, refer to the Alarms and Reports manual.
Software
No Software Authorization Key is required to enable Channelized Data on a
Authorization Key PathBuilder S24x, 26x, and 27x switch.
Channelized Data
5-1
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Application Example
Application Example
Overview
Figure 5-1 shows a typical Channelized Data application where multiple remote
LAN sites feed into a cluster of PathBuilder S24x, 26x, and 27x switch Regional
Concentrators. The PathBuilder S24x, 26x, and 27x switch cluster concentrates the
traffic and passes it on to multiple hosts.
LLC2.IP
TR
S200
S200
64K
56K
PathBuilder S24x, 26x, and 27x switch
Cluster
Timeslot 2
SDLC
SDLC
PB S200
PB S200
PB S200
PB S200
IP
Timeslot 11
Timeslot 23
Timeslot 24
TR
IP
128K
IP
S200
SDLC
Third Party Router
Figure 5-1. Application Example
port. You would also need to configure a station for each port if you wanted to run
the maximum DS0 for a timeslot.
5-2
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Configuring Channelized Data
Configuring Channelized Data
Overview
Before you can use the Channelized Data option on your PathBuilder S24x, 26x, and
27x switch, you must configure the node for Channelized Data operation. This
section describes how to set up your PathBuilder S24x, 26x, and 27x switch for
Channelized Data operation.
Before You Begin
Refer to the following list to make sure you have everything you need before you
begin to configure the Channelized Data option:
• Install a T1/E1 card in slot 8 on your PathBuilder S24x, 26x, and 27x switch.
• If you want to pass both voice and data traffic, or just data traffic, make sure a
2 Mbps T1/E1 card is installed properly in slot 8 on your PathBuilder S24x,
26x, and 27x switch. If you want to pass voice traffic only, you can use a 512
kbps T1/E1 card.
• Obtain the timeslot information from your network service provider. The
timeslot information is needed to configure virtual ports for all your remote
connections.
• Install the software release containing the Channelized Data option in your
PathBuilder S24x, 26x, and 27x switch.
• Make a CTP connection to the CTP port on your PathBuilder S24x, 26x, and
27x switch and begin to configure the Channelized Data option.
Frame Relay
Applications
For Frame Relay applications, you must configure a port and a station for every
timeslot with a unique destination.
What You Have to You need to configure the following records and tables in your PathBuilder S24x,
Configure
26x, and 27x switch to perform Channelized Data operation:
Configure this Record/Table
Port record
To do this...
This sets up the physical T1/E1 ports on
the PathBuilder S24x, 26x, and 27x
switch performing Channelized Data.
See the “Configuring T1 and E1 Physi-
Virtual Port Record (for each remote
connection)
This sets up a Virtual Port Record entry
for each connection between the Path-
Builder S24x, 26x, and 27x switch and a
remote node. See the “Configuring Vir-
tual Ports on the PathBuilder S24x, 26x,
and 27x Switch” section on page 5-18.
Virtual Port Mapping Table
This sets up a timeslot for each
connection between the PathBuilder
S24x, 26x, and 27x switch and the
remote nodes. Refer to the “Configuring
Channelized Data
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Configuring Channelized Data
5-4
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Configuring Channelized Data
Configuring T1 and E1 Physical Ports
Introduction
You have to configure the physical ports for the T1/E1 connections between the
remote nodes and the PathBuilder S24x, 26x, and 27x switch.
T1/E1 physical ports are configured as ports 49 and 50 on the PathBuilder S24x, 26x,
and 27x switch. You can configure up to two T1 or E1 ports per node.
There is an overall limitation of 30 Channelized Data ports for a T1 or E1 card
installed in a node. The remaining ports can be used for voice traffic.
Configuration
Procedure
Follow these steps to configure the physical ports on the PathBuilder S24x, 26x, and
27x switch.
Step
Action
Result
1
From the CTP Main menu, select
Configure -> Ports.
The Port Number parameter
appears.
2
3
Enter the port number. This value is The Port Type parameter appears.
49 or 50.
Enter T1 for a T1 connection or E1
for an E1 connection.
The port parameters for E1 or T1
appear in sequence. See the
details.
4
5
Fill in the remaining port parameters, This saves your changes.
and type a semicolon <;>. Press
Return at the last parameter.
Perform a Node boot.
This implements your changes to
the Port record.
Note
You can perform a Node boot after
configuring all the records and
tables for Channelized Data
operation to implement all your
changes at one time if you prefer.
Channelized Data
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Configuring Channelized Data
Port Record
Figure 5-2 shows the navigational path to the T1 and E1 configuration parameters.
‘
Node: nodename Address: (blank)
Menu: Configure
Date: ___________Time:__________
Path: (Main.6)
1.Node
2.Port
Port Number: 49 to 50
Port Type:T1 or E1
E1
T1
Line Framing Type
Line Framing Type
Line Coding Type
Line Coding Type
Transmit Clock
Transmit Clock
Line Impedance
Line Build Out
Threshold Value - LES
Threshold Value - LCV
Threshold Value - PCV
Threshold Value - CSS
Threshold Value - ES
Threshold Value - BES
Threshold Value - SES
Threshold Value - SEFS
Threshold Value - UAS
Threshold Value - DAS
Facility Data Link
Threshold Value - LES
Threshold Value - LCV
Threshold Value - PCV
Threshold Value - CSS
Threshold Value - ES
Threshold Value - BES
Threshold Value - SES
Threshold Value - SEFS
Threshold Value - UAS
Figure 5-2. Example of the Port Record for the Physical Port for T1 and
E1 Connections
5-6
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Configuring Channelized Data
T1 Port Parameters
Overview
This section describes the T1 port parameters in detail.
Configuration
Guidelines
Configure a T1 Port before configuring a Virtual Port Mapping Record, which maps
a logical timeslot channel (a virtual port) to that port.
Port Record
Parameters
The following parameters are available from the T1 port record.
Port Number
Range:
49, 50
NA
Default:
Description:
Specifies the number of the port you are configuring and serves as
the entry number for the port you are about to configure.
Port Type
Range:
Voice, T1, E1
Null
Default:
Description:
Specifies the type of port you are configuring; the parameter value
you input for port type determines the subsequent parameters that
appear next.
Boot Type:
Changes to this parameter require a Node boot to take effect.
Line Framing Type
Range:
ESF, SF
Default:
ESF
Description:
Indicates type of framing the DS1 circuit uses.
• ESF: Extended SuperFrame
• SF: SuperFrame
Line Coding Type
Range:
B8ZS, B7ZS, AMI
B8ZS
Default:
Channelized Data
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Configuring Channelized Data
Line Coding Type (continued)
Description:
Selects type of zero suppression used on the T1 link.
• B8ZS: Consecutive 8 zero suppression (clear channel)
• B7ZS: Stuffing: (56k x N)
• AMI: Alternate mark inversion (user equipment must
maintain density)
Transmit Clock
Range:
INT, REC
INT
Default:
Description:
Selects the source of transmit clock.
• INT: Internal Oscillator
• REC: Received Timing
Note
Only one T1 port on the card can be selected for REC timing.
Line Build Out
Range:
0 to 4
0
Default:
Description:
Select the Line Build Out to match the physical interface. For a
DSX interface, select the number based on the cable length:
• 0: 0 to 133 ft
• 1: 134 to 266 ft
• 2: 267 to 399 ft
• 3: 400 to 533 ft
• 4: 534 to 655 ft
For a DS1 interface, select the number based on the signal level:
• 0: 0 dB
• 1: -7 dB
• 2: -15 dB
• 3: -22 dB
• 4: Invalid for DS1 interfaces
Facility Data Link
Range:
None, ANSI, ATT
Default:
None
Description:
Describes the use of the facility data link channel. Appears only if
ESF is selected as Line Framing Type.
5-8
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Configuring Channelized Data
Threshold Value LES
Range:
1 to 255
10
Default:
Description:
Specifies the number of errors that must occur within a fixed
15- minute window before an alarm is declared. This is based on
the threshold value for Line Error Seconds, which are seconds in
which one or more line code violation error events are detected.
Threshold Value-LCV
Range:
1 to 255
10
Default:
Description:
Specifies the number of errors that must occur within a fixed
15- minute window before an alarm is declared. This is based on
the threshold value for Line Code Violations, which are the
occurrences of either a bipolar violation or excessive zeroes error
events.
Threshold Value-PCV
Range:
1 to 255
10
Default:
Description:
Specifies the number of errors that must occur within a fixed
15- minute window before an alarm is declared. This is based on
the threshold value for Path Coding Violations, which are frame
synchronization bit errors in the D4 and E1-noCRC formats, or
CRC errors in the ESF and E1-CRC formats.
Threshold Value-CSS
Range:
1 to 255
10
Default:
Description:
Specifies the number of errors that must occur within a fixed
15- minute window before an alarm is declared. This is based on
the threshold value for Controlled Slip Seconds, which are
one-second intervals containing one or more controlled slips.
Channelized Data
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Configuring Channelized Data
Threshold Value-ES
Range:
1 to 255
10
Default:
Description:
Specifies the number of errors that must occur within a fixed
15- minute window before an alarm is declared. This is based on
the threshold value for Error Seconds, which have:
• one or more path code violations
• one or more out-of-frame defects
• one or more controlled slip events
• a detected alarm indication signal defect
For D4 and E1-CRC links, the presence of bipolar violations also
triggers an errored second.
Threshold Value-BES
Range:
1 to 255
10
Default:
Description:
Specifies the number of errors that must occur within a fixed
15- minute window before an alarm is declared. This is based on
the threshold value for Bursty Errored Seconds, which have:
• fewer than 320 and more than 1 path coding violation error
events
• no severely errored frame defects
• no detected incoming alarm indication signal defects
Controlled slips are not included; BES is not incremented during
an unavailable second.
5-10
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Configuring Channelized Data
Threshold Value-SES
Range:
1 to 255
10
Default:
Description:
Specifies the number of errors that must occur within a fixed
15- minute window before an alarm is declared. This is based on
the threshold value for Severely Error Seconds.
Severely Errored Seconds for ESF signals have:
• 320 or more path code violation error events
• one or more out-of-frame defects
• a detected alarm indication signal defect
Severely Errored Seconds for E1-CRC signals have:
• 832 or more path code violation error events
• one or more out-of-frame defects
Severely Errored Seconds for E1-noCRC signals have:
• 2048 line coding violations or more
Severely Errored Seconds for D4 signals have:
• a count of one-second intervals with framing error events
• an out-of-frame defect
• 1544 line coding violations or more
Controlled slips are not included; BES is not incremented during
an unavailable second.
Threshold Value SEFS
Range:
1 to 255
1
Default:
Description:
Specifies the number of errors that must occur within a fixed
15- minute window before an alarm is declared. This is based on
the threshold value for Severely Error Framing Seconds, which
have:
• one or more out-of-frame defects
• a detected alarm indication signal defect
Channelized Data
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Configuring Channelized Data
Threshold Value UAS
Range:
1 to 255
1
Default:
Description:
Specifies the number of errors that must occur within a fixed
15- minute window before an alarm is declared. This is based on
the threshold value for Unavailable Seconds. The DS1 interface is
unavailable from the onset of 10 contiguous SESs or any condition
leading to a failure;
• once unavailable and if no failure is present, the DS1 interface
becomes available at the onset of 10 contiguous seconds with
no SESs
• once unavailable and if a failure is present, the DS1 interface
becomes available at the onset of 10 contiguous seconds with
no SESs if the failure clearing time is less than or equal to 10
seconds
• once unavailable and if a failure is present, the DS1 interface
becomes available at
– the onset of 10 contiguous seconds with no SESs if the
failure clearing time is more than 10 seconds
– or the onset period leading to the successful clearing
condition, whichever occurs later
5-12
Channelized Data
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Configuring Channelized Data
E1 Port Parameters
Introduction
This section describes the E1 port parameters in detail. The E1 Port Record contains
parameter values that you use to define operating characteristics for an E1 dual port
digital interface card.
Configuration
Guidelines
Configure an E1 port before configuring a Virtual Port Mapping Record, which maps
a logical timeslot channel (a virtual port) to that port.
E1 Port Record
Parameters
The following parameters are available from the E1 port record.
Port Type
Range:
Voice, T1, E1
Null
Default:
Description:
Specifies the type of port that you are configuring; the parameter
value you input for port type determines the parameters that
appear next.
Boot Type:
Changes to this parameter require a Node boot to take effect.
Line Framing Type
Range:
E1_CAS, E1_CAS_CRC, E1_CAS_FEBE
Default:
E1_CAS
Description:
Indicates type of framing the E1circuit uses.
• E1_CAS: Channel Associated Signaling (CAS)
• E1_CAS_CRC: Channel Associated Signaling with CRC
• E1_CAS_FEBE: Channel Associated Signaling with Si = Far
End Bit Error functionality that sends an indication in TS0
that signifies receipt of a SuperFrame with a bad CRC
Line Coding
Range:
AMI, HDB3
HDB3
Default:
Description:
Selects zero suppression technique used on this E1 link.
• AMI: Alternate Mark Inversion (for testing only)
• HDB3: High Density Bipolar 3
Channelized Data
5-13
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Configuring Channelized Data
Line Impedance
Range:
75, 120 Ω
Default:
120 Ω
Description:
Defines the line impedance as 75 Ω or 120 Ω
Transmit Clock
Range:
INT, REC
INT
Default:
Description:
Selects the source of transmit clock.
• INT: From Internal Oscillator
• REC: Transmit Clock is derived from Receive Clock
Note
Only one E1 port on the card can be selected for REC timing.
Threshold Value-LCV
Range:
1 to 255
10
Default:
Description:
Specifies the number of errors that must occur within a fixed
15- minute window before an alarm is declared. This is based on
the threshold value for Line Code Violations, which are the
occurrences of either a bipolar violation or excessive zeroes error
events.
Threshold Value-PCV
Range:
1 to 255
10
Default:
Description:
Specifies the number of errors that must occur within a fixed
15- minute window before an alarm is declared. This is based on
the threshold value for Path Coding Violations, which are frame
synchronization bit errors in the D4 and E1-noCRC formats, or
CRC errors in the ESF and E1-CRC formats.
5-14
Channelized Data
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Configuring Channelized Data
Threshold Value-CSS
Range:
1 to 255
10
Default:
Description:
Specifies the number of errors that must occur within a fixed
15- minute window before an alarm is declared. This is based on
the threshold value for Controlled Slip Seconds, which are one-
second intervals containing one or more controlled slips.
Threshold Value-ES
Range:
1 to 255
10
Default:
Description:
Specifies the number of errors that must occur within a fixed
15- minute window before an alarm is declared. This is based on
the threshold value for Error Seconds, which have:
• one or more path code violations
• one or more out-of-frame defects
• one or more controlled slip events
• a detected alarm indication signal defect
For D4 and E1-CRC links, the presence of bipolar violations also
triggers an errored second.
Threshold Value-BES
Range:
1 to 255
10
Default:
Description:
Specifies the number of errors that must occur within a fixed
15- minute window before an alarm is declared. This is based on
the threshold value for Bursty Errored Seconds, which have:
• fewer than 320 and more than 1 path coding violation error
events
• no severely errored frame defects
• no detected incoming alarm indication signal defects
Controlled slips are not included; BES is not incremented during
an unavailable second.
Channelized Data
5-15
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Configuring Channelized Data
Threshold Value-SES
Range:
1 to 255
10
Default:
Description:
Specifies the number of errors that must occur within a fixed
15- minute window before an alarm is declared. This is based on
the threshold value for Severely Error Seconds.
Severely Errored Seconds for ESF signals have:
• 320 or more path code violation error events
• one or more out-of-frame defects
• a detected alarm indication signal defect
Severely Errored Seconds for E1-CRC signals have:
• 832 or more path code violation error events
• one or more out-of-frame defects
Severely Errored Seconds for E1-noCRC signals have:
• 2048 line coding violations or more
Severely Errored Seconds for D4 signals have:
• a count of one-second intervals with framing error events
• an out-of-frame defect
• 1544 line coding violations or more
Controlled slips are not included; BES is not incremented during
an unavailable second.
Threshold Value SEFS
Range:
1 to 255
1
Default:
Description:
Specifies the number of errors that must occur within a fixed
15- minute window before an alarm is declared. This is based on
the threshold value for Severely Error Framing Seconds, which
have:
• one or more out-of-frame defects
• a detected alarm indication signal defect
5-16
Channelized Data
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Configuring Channelized Data
Threshold Value UAS
Range:
1 to 255
1
Default:
Description:
Specifies the number of errors that must occur within a fixed
15- minute window before an alarm is declared. This is based on
the threshold value for Unavailable Seconds. The DS1 interface is
unavailable from the onset of 10 contiguous SESs or any condition
leading to a failure;
• once unavailable and if no failure is present, the DS1 interface
becomes available at the onset of 10 contiguous seconds with
no SESs
• once unavailable and if a failure is present, the DS1 interface
becomes available at the onset of 10 contiguous seconds with
no SESs if the failure clearing time is less than or equal to 10
seconds
• once unavailable and if a failure is present, the DS1 interface
becomes available at
– the onset of 10 contiguous seconds with no SESs if the
failure clearing time is more than 10 seconds
– or the onset period leading to the successful clearing
condition, whichever occurs later
Channelized Data
5-17
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Configuring Channelized Data
Configuring Virtual Ports on the PathBuilder S24x, 26x, and 27x Switch
Introduction
You have to configure a virtual port for each connection between the remote nodes
and the PathBuilder S24x, 26x, and 27x switch.
How to...
Follow these steps to configure virtual ports between the remote nodes and the
PathBuilder S24x, 26x, and 27x switch.
Step
Action
Result
1
From the CTP Main menu, select
Configure -> Ports.
The Ports menu appears, as shown
2
3
Enter the Port Number. This value
should be 100 or above to configure a
virtual port.
The Port Type: parameter appears.
Enter X25 for an X.25 connection or The standard port parameters for
FR for a Frame Relay connection.
X.25 or Frame Relay appear in
sequence. Refer to the appropriate
manuals for details.
4
5
Fill in the remaining parameters, and This saves the record in CMEM.
enter a semicolon <;>. Press Return
when you are finished.
Perform a Node boot.
This implements the configuration
changes you made.
Booting Virtual
Ports
Boot a virtual port by entering the virtual port number and issuing a port boot
command. Booting a virtual port brings down SVCs associated with that virtual port,
but does not affect the operation of the T1 or E1 port, or of any other virtual ports.
Enabling/Disabling Enabling or disabling a virtual port has no effect on a T1 or E1 port or other virtual
Virtual Ports
ports. However, disabling a T1 or E1 port makes all associated virtual ports unusable.
Enabling a T1 or E1 port makes all associated virtual ports usable; their SVCs can be
established. Virtual ports previously disabled via the disable port command remain
disabled.
Port Speed
Port speed for virtual ports is set from the DS0 Rate parameter in the Virtual Ports
Mapping Table. You can set the rate of speed for traffic at 56k or 64k. See the
“Configuring Virtual Port Mapping Table” section on page 5-20 for more details.
5-18
Channelized Data
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Configuring Channelized Data
Number and Port Type parameters are always the first two parameters that appear in
the Port record.
Node: nodename Address: (blank) Date: ___________Time:__________
Menu: Configure
Path: (Main.6)
1.Node
2.Port
Port Number: 100 - 254
Port Type: X25 or FR
Figure 5-3. Port Configuration for Channelized Data Option
Channelized Data
5-19
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Configuring Channelized Data
Configuring Virtual Port Mapping Table
Introduction
Before You Begin
Function
A T1 or E1 digital port comprises multiple logical data channels. These channels,
known as virtual ports, are not associated with any physical slot number and have no
physical I/O of their own.
Obtain the timeslot assignments for all the remote nodes connecting to the
PathBuilder S24x, 26x, and 27x switch from your network services provider. You
need this information to complete the virtual ports configuration.
By configuring the Virtual Port Mapping Table, a timeslot channel on a specific T1
or E1 line is mapped to a virtual port. Virtual ports are numbered from 100 to 254,
whereas ports with actual physical connections are numbered from 1 to 54.
Configuration
Guidelines
The Virtual Port Mapping Table must be configured in conjunction with other
records as follows.
• Configure the physical port record as either T1 or E1 and all virtual ports
before you configure the Virtual Port Mapping Table.
• Configure a Virtual Port Mapping Record to assign a timeslot number per
T1/E1 channel for the application.
What You See
Figure 5-4 shows the Virtual Port Mapping Table.
Node: nodename Address: (blank) Date: ___________Time:__________
Menu: Configure
Path: (Main.6)
1.
Node
•
•
•
20. Virtual Port Mapping Table
Virtual Port Number
Port Type
T1/E1 Port Number
Timeslot Number
DS0Rate
Figure 5-4. Virtual Port Mapping Table
5-20
Channelized Data
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Configuring Channelized Data
Configuring the
Virtual Mapping
Table
Perform this procedure to configure the Virtual Port Mapping Table.
Step
Action
Result
1
From the CTP Main menu, select
Configure.
The Configure menu appears.
2
Select Virtual Port Mapping
Table from the Configure menu.
The first parameter appears—
Virtual Port Number—as shown
3
4
Enter a value for each parameter.
The next parameter appears.
The record is saved.
Enter a semicolon <;> once you
have entered values for all
parameters.
Virtual Port
This section describes parameters for the Virtual Port Mapping Table.
Mapping Table
Parameters
Virtual Port Number
Range:
100 to 254
(blank)
Default:
Description:
The timeslot logical channel (a virtual port number) to which a
specific T1 or E1 card’s port number is mapped.
Port Type
Range:
Voice, Data
Default:
Voice
Description:
Boot Type:
Specify the type of traffic you are passing.
Changes to this parameter require a Node boot to take effect.
Physical T1/E1 Port Number
Range:
49 or 50
(blank)
Default:
Description:
T1 or E1 port number associated with this logical timeslot channel
(a virtual port number).
Boot:
Changes to this parameter require a Node boot to take effect.
Channelized Data
5-21
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Configuring Channelized Data
Time Slots
Range:
1 to 31
1
Default:
Description:
Each time slot provides a 64k channel to pass traffic. Specify the
time slot assignment for the logical channel:
• 1 to 24 for T1 port type
• 1 to 31 for E1 port type; 16 is not allowed
Boot Type:
Changes to this parameter require a Node boot to take effect.
DS0 Rate
Range:
56k, 64k
56k
Default:
Description:
Specify the DS0 Rate. This sets the rate of speed for each time
slot.
Boot Type:
Changes to this parameter require a Node boot to take effect.
5-22
Channelized Data
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Appendix A
Cables
Overview
Introduction
The tables in this appendix describe the pinouts for ports on the PathBuilder S24x,
26x, and 27x switch. Cable pinouts for Ethernet and LAN cables are also provided.
The following table shows EIA 232-D signals with V.24 DIMs on the motherboard
and SDB cards.
EIA 232-D Signals (Motherboard and SDB)
Pin
DCE
Position
Function/Signal
Name
Pin
DTE
Position
Function/Signal Name
1
--------------- Shield/Frame Ground
<------------- TXD
1
2
--------------- Shield/Frame Ground
--------------> TXD
2
3
--------------> RXD
3
<------------- RXD
4
<------------- RTS
4
-------------> RTS
5
--------------> CTS
5
<------------- CTS
6
--------------> DSR
6
<------------- DSR
7
--------------- Signal Ground
--------------> DCD
7
--------------- Signal Ground
<------------- DCD
8
8
14
15
<------------- DATA RESTRAINT
14
--------------> DATA RESTRAINT
<------------- TRANSMIT CLOCK
--------------> TRANSMIT CLOCK or 15
V.54 Loop 3 *
16
--------------> STANDBY
INDICATOR
16
<------------- STANDBY INDICATOR
<------------- RECEIVE CLOCK
17
18
--------------> RECEIVE CLOCK
17
<-------------- EXTERNAL RECEIVE 18
CLOCK
--------------> EXTERNAL RECEIVE
CLOCK or V.54 Loop 3 *
20
21
22
24
<------------- DTR
20
21
22
24
--------------> DTR
--------------> V.54 Loop 2
<------------ RI
<------------- V.54 Loop 2
<------------> RI/TM *
<------------- EXTERNAL
--------------> EXTERNAL TRANSMIT
CLOCK
TRANSMIT CLOCK
25
<----------
MAKE BUSY
25
-------------> TEST MODE
* Pin assigned double function as follows:
Outputs RI when switch is on. Otherwise, it acts as a TM input signal.
Cables
A-1
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The following table shows V.35/V.36 signals with V.35/V.36 DIMs on the
motherboard.
V.35/V.36 (Motherboard)
Pin
DCE
Position
Function/
Signal Name
Pin
DTE
Position
Function/
Signal Name
1
--------------- SHIELD/FRAME 1
GROUND
--------------- SHIELD/FRAME
GROUND
2
<-------------- TRANSMITTED
DATA A
2
--------------> TRANSMITTED
DATA A
3
--------------> RECEIVED
DATA A
3
<-------------- RECEIVED
DATA A
4
<-------------- REQUEST TO
SEND
4
--------------> REQUEST TO
SEND
5
--------------> CLEAR TO
SEND
5
<-------------- CLEAR TO
SEND
6
--------------> DATA SET
READY
6
<-------------- DATA SET
READY
7
-------------- SIGNAL
GROUND
7
--------------- SIGNAL
GROUND
8
--------------> DATA CARRIER
DETECT
8
<-------------- DATA CARRIER
DETECT
14
15
16
17
18
20
<-------------- TRANSMIT
DATA B
14
15
16
17
18
20
--------------> TRANSMIT
DATA B
--------------> TRANSMIT
CLOCK A
<-------------- TRANSMIT
CLOCK A
--------------> RECEIVED
DATA B
<-------------- RECEIVED
DATA B
--------------> RECEIVE
CLOCK A
<-------------- RECEIVE
CLOCK A
--------------> RECEIVE
CLOCK B
<-------------- RECEIVE
CLOCK B
<-------------- DATA
TERMINAL
--------------> DATA
TERMINAL
READY
READY
21
22
--------------> TRANSMIT
CLOCK B
21
22
<-------------- TRANSMIT
CLOCK B
<-------------- EXTERNAL
TRANSMIT
-------------> EXTERNAL
TRANSMIT
CLOCK B
CLOCK B
24
<-------------- EXTERNAL
TRANSMIT
24
--------------> EXTERNAL
TRANSMIT
CLOCK A
CLOCK A
A-2
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The following table shows V.35/V.36 signals with V.35/V.36 DIMs on the SDB card.
V.35/V.36 (SDB)
Pin
DCE
Position
Function/
Signal Name
Pin
DTE
Position
Function/Signal
Name
1
--------------- SHIELD/FRAME 1
GROUND
--------------- SHIELD/FRAME
GROUND
2
<-------------- TRANSMITTED
DATA A
2
--------------> TRANSMITTED
DATA A
3
--------------> RECEIVED
DATA A
3
<-------------- RECEIVED DATA
A
4
<-------------- REQUEST TO
SEND
4
--------------> REQUEST TO
SEND
5
--------------> CLEAR TO
SEND
5
<-------------- CLEAR TO SEND
6
--------------> DATA SET
READY
6
<-------------- DATA SET
READY
7
-------------- SIGNAL
GROUND
7
--------------- SIGNAL
GROUND
8
--------------> DATA CARRIER
DETECT
8
<-------------- DATA CARRIER
DETECT
13
14
15
16
17
TRANSMIT
CLOCK (B)
13
14
15
16
17
--------------> TRANSMIT
CLOCK (B)
<-------------- TRANSMIT
DATA B
--------------> TRANSMIT DATA
B
--------------> TRANSMIT
CLOCK A
<-------------- TRANSMIT
CLOCK A
--------------> RECEIVED
DATA B
<-------------- RECEIVED DATA
B
--------------> RECEIVE
CLOCK A
<-------------- RECEIVE CLOCK
A
18
19
-------------- N/A
18
19
<-------------- LOOP 3 (V.36 only)
<-------------- RECEIVE
CLOCK B
--------------> RECEIVE CLOCK
B
20
<-------------- DATA
TERMINAL
20
--------------> DATA TERMINAL
READY
READY
21
23
-------------- N/A
21
23
<-------------- LOOP 3 (V.36 only)
<-------------- EXTERNAL
TRANSMIT
-------------> EXTERNAL
TRANSMIT
CLOCK B
CLOCK B
24
25
<-------------- EXTERNAL
TRANSMIT
24
25
--------------> EXTERNAL
TRANSMIT
CLOCK A
CLOCK A
-------------- TEST MODE
-------------- TEST MODE
A-3
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The following table shows V.11 signals with V.11 DIMs on the motherboard.
V11 Signals (Motherboard)
Pin
DCE
Position
V.11
Function/
Signal
Pin
DTE
Position
Function/
Signal
Name
Name
1
---------------
SHIELD/
FRAME
1
--------------- SHIELD/
FRAME
GROUND
GROUND
2
<-------------- T (A) TRANSMIT
DATA A
2
3
-------------> TRANSMIT
DATA A
3
--------------> R (A) RECEIVE
DATA A
<-------------- RECEIVE
DATA A
4
<-------------- C (A) CONTROL A 4
--------------- CONTROL A
>
6
--------------> I (B) INDICATION 6
B
<-------------- INDICATION
B
7
---------------
SIGNAL
GROUND
7
--------------- SIGNAL
GROUND
8
--------------> I (A) INDICATION 8
A
<-------------- INDICATION
A
14
15
16
<-------------- T (B) TRANSMIT 14
DATA B
--------------> TRANSMIT
DATA B
--------------> S (A) SIGNAL
TIMING (A)
15
<-------------- SIGNAL
TIMING (A)
--------------> R (B) RECEIVE
DATA B
16
<-------------- RECEIVE
DATA B
20
21
<-------------- C (B) CONTROL B 20
--------------> S (B) SIGNAL 21
TIMING (B)
--------------> CONTROL B
<-------------- SIGNAL
TIMING (B)
22
24
<-------------- X (B) EXTERNAL 22
CLOCK B
--------------> EXTERNAL
CLOCK B
<-------------- X (A) EXTERNAL 24
CLOCK A
--------------> EXTERNAL
CLOCK A
A-4
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The following table shows V.11 signals with V.11 DIMs on the SDB card.
V11 Signals (SDB)
Pin
DCE
Position
V.11
Function/
Signal
Pin
DTE
Position
Function/
Signal
Name
Name
1
---------------
SHIELD/
FRAME
1
--------------- SHIELD/
FRAME
GROUND
GROUND
2
<-------------- T (A) TRANSMIT
DATA A
2
3
-------------> TRANSMIT
DATA A
3
--------------> R (A) RECEIVE
DATA A
<-------------- RECEIVE
DATA A
4
<-------------- C (A) CONTROL A 4
--------------- CONTROL A
>
6
--------------> I (B) INDICATION 6
B
<-------------- INDICATION
B
7
---------------
SIGNAL
GROUND
7
--------------- SIGNAL
GROUND
8
--------------> I (A) INDICATION 8
A
<-------------- INDICATION
A
13
14
15
16
SIGNAL
TIMING B
13
SIGNAL
TIMING B
<-------------- T (B) TRANSMIT 14
DATA B
--------------> TRANSMIT
DATA B
--------------> S (A) SIGNAL
TIMING (A)
15
<-------------- SIGNAL
TIMING (A)
--------------> R (B) RECEIVE
DATA B
16
<-------------- RECEIVE
DATA B
20
23
<-------------- C (B) CONTROL B 20
--------------> CONTROL B
<-------------- X (B) EXTERNAL 23
CLOCK B
--------------> EXTERNAL
CLOCK B
24
<-------------- X (A) EXTERNAL 24
CLOCK A
--------------> EXTERNAL
CLOCK A
Cables
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Ethernet Cable Pinouts
Ethernet Cable Pinouts
Introduction
This cable may have a maximum length of up to 100m and must conform to the
802.3 10BaseT specification, with a nominal impedance of 100 ohms. Category 3, 4,
or 5 cable may be used. Category 4 or 5 is preferred.
Additional
Refer to ANSI/TIA/EIA 568A and the following references:
Information
• CSMA/CD Access Method and Physical Layer Specifications, IEEE standard
802.3-1992.
• Draft supplement to IEEE standard 802.3, System Considerations for Multi
Segment 10B/S Baseband Networks (Chapter 13) and Medium Attachment
Unit and Baseband Medium Specification, Type 10BaseT (Chapter 14),
p802.3i-1990.
Ethernet RJ-45S
The following table shows the Ethernet RJ-45S connector signals.
Connector Signals
Pin
Signal
1
2
3
6
Transmit +
Transmit -
Receive +
Receive -
Ethernet DB-15
The AIU cable uses male DB-15 to female DB-15 connectors with slide latches in a
Connector Signals straight-through connection.
The twisted pair combinations are 1/2, 3/6, and 4/5, and may be used for Ethernet.
This cable may have a maximum length of up to 50m and must conform to the 802.3
10BASE5 specification.
The following table shows the Ethernet DB-15 connector signals.
Pin
Signal
1
Shield
2
Collision+
Transmit+
Shield
3
4
5
Receive+
Ground
Shield
6
8
9
Collision-
Transmit-
Shield
10
11
A-6
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Ethernet Cable Pinouts
Pin
Signal
12
13
14
Receive-
+12V
Shield
Cables
A-7
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Ethernet Cable Pinouts
A-8
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Appendix B
PathBuilder S24x, 26x, and 27x Switch Specifications
Overview
The following sections list the physical, electrical, and environmental specifications
for the PathBuilder S24x, 26x, and 27x switch.
Physical
Height: 17.8 in. (45.3 cm)
Specifications
Width: 10.0 in. (25.5 cm)
Depth: 16.8 in. (42.8 cm)
Weight: (fully configured) 27.5 lb (12.5 kg)
Power
Power Output:
Requirements
200 W max
AC Input:
The standard AC Input power supply module features an external voltage select
switch, IEC line input jack, internal 3 1/8 in. fan, and internal fusing.
• 90 VAC to 132 VAC, 6 Amps RMS max, 50-60 Hz
• 180 VAC to 264 VAC, 3 Amps RMS max, 50-60 Hz
DC Input:
The optional DC Input power supply module features a covered input terminal block,
an internal 3 1/8 in. fan and internal fusing.
• -36V to -72V, 10 Amps RMS max.
Environmental
Limits
PathBuilder S24x, 26x, and 27x Switch System: 0° C to 50° C (32° F to 122° F)
Storage Temperature: –40° C to 70° C (–40° F to 158° F)
Relative Humidity: 5% to 95% (noncondensing)
PathBuilder S24x, 26x, and 27x Switch Specifications
B-1
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B-2
PathBuilder S24x, 26x, and 27x Switch Specifications
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Appendix C
PathBuilder S24x, 26x, and 27x Switch Error Codes
Overview
Numeric LED
Display
The 2-character numeric LED display provides system diagnostic codes to assist in
troubleshooting. When the Service LED is ON, a 2-digit code on the numeric LED
display corresponds to a certain event or failure.
Status Display
Error Codes
The following table lists the codes that may appear.
Numeric
Display
Status Service
Description/Comments
FBIST motherboard test
LED
Flicker
Flicker
OFF
LED
00
OFF
01-08
OFF
ON
ON
ON
ON
ON
ON
ON
ON
ON
FBIST I/O card test
00-08
20
Slot # of highest priority card diagnostic failure
Modem card failure
OFF
30
OFF
PBIST—FLASH failure
PBIST—CMEM failure
Lab strap installed
31
OFF
33
OFF
34
OFF
CMEM battery bad
40
OFF
PBIST—Invalid FLASH checksum
Alternate FLASH loaded
41
OFF
42
OFF
Default CMEM loaded—incompatible CMEM
image detected
43
44
45
OFF
OFF
OFF
ON
ON
ON
Alternate configuration loaded
FLASH being erased; this takes a few minutes
Waiting for flash file; Port 6 configured at 9600
bps
45.
OFF
OFF
ON
ON
Waiting for flash file; Port 6 configured at
19200 bps
4.5.
Waiting for flash file; Port 6 configured at
115200 bps
46
46
Blinking ON
No Blink ON
Status OK—loading
Load problem— reset node and restart cold
load procedure.
47
OFF
ON
Copying from RAM to FLASH; this takes a
few minutes
PathBuilder S24x, 26x, and 27x Switch Error Codes
C-1
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Numeric
Display (continued)
Status Service
LED LED
Description/Comments
FLASH write failure
48
OFF ON
49
OFF
OFF
ON
ON
Read error on Port 6
60
ON
Local DRAM exhausted
PBIST (~3 seconds)
8.8.
(Blank)
L0
OFF
OFF
OFF
OFF
OFF
PBIST lamp-off test (~.5 seconds)
Load Phase 0—PROM IPL loads the FLASH
IPL image, (~ 1 second)
L1
OFF
OFF
Load Phase 1—FLASH IPL decompresses and
loads the FBIST image (~ 1 second)
(Rotating segments)
L2
ON
OFF
OFF
FBIST lamp test (~ 2 seconds)
OFF
Load Phase 2—FLASH IPL decompresses and
loads the ONS image (several seconds)
L3
L4
CR
OFF
OFF
OFF
OFF
OFF
OFF
ON
Load Phase 3—STARTUP inventories the
modules in ONS image (~ 3 seconds)
Load Phase 4—SYSINIT inits memory mgmt.
and all ONS modules (~10 seconds)
PathBuilder S24x, 26x, and 27x switch has
crashed
(Blank with flashing
dashes)
OFF
Normal system operation
Note
During a warm start, display sequencing starts with the “L2” code.
C-2
PathBuilder S24x, 26x, and 27x Switch Error Codes
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Appendix D
Technical Support
3Com provides easy access to technical support information through a variety of
services. This appendix describes these services.
Information contained in this appendix is correct at time of publication. For the very
latest, 3Com recommends that you access the 3Com Corporation World Wide Web
site.
Online Technical
Services
3Com offers worldwide product support 24 hours a day, 7 days a week, through the
following online systems:
• World Wide Web site
• 3Com FTP site
• 3Com Bulletin Board Service (3Com BBS)
• 3ComFactsSM automated fax service
World Wide Web
Site
Access the latest networking information on the 3Com Corporation World Wide Web
site by entering the URL into your Internet browser:
http://www.3com.com/
This service provides access to online support information such as technical
documentation and software library, as well as support options ranging from
technical education to maintenance and professional services.
3Com FTP Site
Download drivers, patches, and software, across the Internet from the 3Com public
FTP site. This service is available 24 hours a day, 7 days a week.
To connect to the 3Com FTP site, enter the following information into your FTP
client:
• Hostname: ftp.3com.com (or 192.156.136.12)
• Username: anonymous
• Password: <your Internet e-mail address>
Note
A user name and password are not needed with Web browser software such as
Netscape Navigator and Internet Explorer.
Technical Support
D-1
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3Com Bulletin
Board Service
The 3Com BBS contains patches, software, and drivers for 3Com products. This
service is available through analog modem or digital modem (ISDN) 24 hours a day,
7 days a week.
Access by Analog Modem
To reach the service by modem, set your modem to 8 data bits, no parity, and 1 stop
bit. Call the telephone number nearest you:
Country
Australia
Data Rate
Up to 14,400 bps
Up to 14,400 bps
Up to 14,400 bps
Up to 28,800 bps
Up to 14,400 bps
Up to 14,400 bps
Up to 14,400 bps
Up to 28,800 bps
Telephone Number
61 2 9955 2073
55 11 5181 9666
33 1 6986 6954
4989 62732 188
852 2537 5601
39 2 27300680
81 3 3345 7266
52 5 520 7835
Brazil
France
Germany
Hong Kong
Italy
Japan
Mexico
P.R. of China Up to 14,400 bps
86 10 684 92351
886 2 377 5840
Taiwan,
R.O.C.
Up to 14,400 bps
U.K.
Up to 28,800 bps
Up to 28,800 bps
44 1442 438278
1 408 980 8204
U.S.A.
Access by Digital Modem
ISDN users can dial in to the 3Com BBS using a digital modem for fast access up to
56 Kbps. To access the 3Com BBS using ISDN, use the following number:
1 408 654 2703
3ComFacts
Automated Fax
Service
The 3ComFacts automated fax service provides technical articles, diagrams, and
troubleshooting instructions on 3Com products 24 hours a day, 7 days a week.
Call 3ComFacts using your Touch-Tone telephone:
1 408 727 7021
Support from Your If additional assistance is required, contact your network supplier. Many suppliers
Network Supplier
are authorized 3Com service partners who are qualified to provide a variety of
services, including network planning, installation, hardware maintenance,
application training, and support services.
When you contact your network supplier for assistance, have the following
information ready:
• Product model name, part number, and serial number
• A list of system hardware and software, including revision levels
• Diagnostic error messages
• Details about recent configuration changes, if applicable
D-2
Technical Support
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If you are unable to contact your network supplier, see the following section on how
to contact 3Com.
Support from
3Com
If you are unable to obtain assistance from the 3Com online technical resources or
from your network supplier, 3Com offers technical telephone support services. To
find out more about your support options, please call the 3Com technical telephone
support phone number at the location nearest you.
When you contact 3Com for assistance, have the following information ready:
• Product model name, part number, and serial number
• A list of system hardware and software, including revision levels
• Diagnostic error messages
• Details about recent configuration changes, if applicable
Below is a list of worldwide technical telephone support numbers:
Country
Telephone Number
Country
Telephone
Number
Asia Pacific Rim
Australia
Hong Kong
India
Indonesia
Japan
Malaysia
New Zealand
Pakistan
Philippines
1 800 678 515
800 933 486
P.R. of China
10800 61 00137 or
021 6350 1590
800 6161 463
61 2 9937 5085
001 800 61 009
0031 61 6439
1800 801 777
0800 446 398
61 2 9937 5085
1235 61 266 2602
Singapore
S. Korea
From anywhere in S. Korea: 82 2 3455 6455
From Seoul:
Taiwan, R.O.C.
Thailand
00798 611 2230
0080 611 261
001 800 611 2000
Europe
From anywhere in Europe, +31 (0)30 6029900 phone
call: +31 (0)30 6029999 fax
From the following European countries, you may use the toll-free numbers:
Austria
Belgium
Denmark
Finland
France
Germany
Hungary
Ireland
Israel
06 607468
0800 71429
800 17309
0800 113153
0800 917959
0130 821502
00800 12813
1 800 553117
177 3103794
1678 79489
Netherlands
Norway
Poland
Portugal
South Africa
Spain
Sweden
Switzerland
U.K.
0800 0227788
800 11376
0800 3111206
05 05313416
0800 995014
900 983125
020 795482
0800 55 3072
0800 966197
Italy
Latin America
Argentina
Brazil
541 312 3266
55 11 523 2725, ext. 422 Mexico
Colombia
571 629 4847
01 800 849 2273
North America
1 800 NET 3Com
(1 800 638 3266)
Technical Support
D-3
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Returning
Before you send a product directly to 3Com for repair, you must first obtain a Return
Products for Repair Materials Authorization (RMA) number. Products sent to 3Com without RMA
numbers will be returned to the sender unopened, at the sender’s expense.
To obtain an RMA number, call or fax:
Country
Telephone Number
Fax Number
65 543 6348
011 44 1442 435718
Asia, Pacific Rim
65 543 6342
Europe, South Africa, and 011 44 1442 435860
Middle East
From the following European countries, you may call the toll-free numbers; select
option 2 and then option 2:
Austria
Belgium
Denmark
Finland
France
Germany
Hungary
Ireland
06 607468
0800 71429
800 17309
0800 113153
0800 917959
0130 821502
00800 12813
1800553117
177 3103794
1678 79489
0800 0227788
800 11376
00800 3111206
05 05313416
0800 995014
900 983125
020 795482
0800 55 3072
0800 966197
Israel
Italy
Netherlands
Norway
Poland
Portugal
South Africa
Spain
Sweden
Switzerland
U.K.
Latin America
1 408 326 2927
1 408 764 6883
U.S.A. and Canada
1 800 876 3266, option 2 1 408 764 7120
3/26/98
D-4
Technical Support
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Index
Numerics
description 5-1
sample application 5-2
statistics 5-1
10 Base 2 Transceiver 1-9
10 Base T Transceiver 1-41
3Com bulletin board service (3Com BBS) D-2
3Com URL D-1
3ComFacts D-2
-48V Ringer/Power Supply Card and Enclosure
cables required 1-39
virtual ports
configuring 5-18
Checking Equipment 2-4
CL
CSU loopback 3-9
CLK
description 1-38
example of (figure) 1-38
jumpers
clock mode 3-9
Cluster Application Example 1-5
CMEM SIMM 1-13
Cold Restart 3-24
Configure
clock source parameter 3-7
Configuring
definitions 1-38
installing 1-38
locations 1-38
A
E1 port
guidelines for use 5-13
parameters 5-13
Virtual Port Mapping Table
description 5-20
Alarms
Channelized Data 5-1
Application Example
cluster 1-5
Performance Branch Node 1-3
Regional Concentrator 1-4
Audience vii
example of (figure) 5-20
parameters 5-21
Connecting
the Control Terminal Port (CTP) 3-22
to the Network Manager 3-22
Control Terminal Loopbacks 3-10
Cover, top
removing/replacing 4-3
CTP
B
Back Panel 1-16
Battery, lithium
removing/replacing 4-14
BPV
cabling 3-22
bilpolar violation 3-8
Branch Node Application 1-3
bulletin board service D-2
D
Data Interface Modules (see DIM)
Default Node Command Start 3-25
Diagnostics
C
menu 3-9
power-up 3-24
Diagnostics menu 3-9
DIM 1-15
installation 3-5, 3-12
removal 3-13
DIMs and Cable Connection 1-15
DIP Switches
C-
negative sealing current 3-8
C+
positive sealing current 3-8
Cabling 3-22
CTP 3-22
I/O ports 3-22
Mesh Network 3-27
the PathBuilder S24x, 26x, and 27x
Switch 3-17
motherboard 3-3
setting 3-3
DL
Canadian 1-42
Channelized Data
alarms 5-1
DSU loopback 3-8
DRAM 1-12
DSPM/E&M Card
configuring 5-3
Index-1
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cables required 1-26
description 1-10, 1-26
example of (figure) 1-27
functions provided 1-26
jumpers
F
fax service (3ComFacts) D-2
FCC
information 1-46
regulations 1-43
defaults 1-29
definitions 1-29
for UK and Germany two-wire complex
impedance 1-30
FLASH SIMM 1-13
Front Panel Cover
removing/replacing 4-5
installing 1-31
locations 1-31
H
DSPM/FXS Card
cables required 1-32
description 1-32
example of (figure) 1-33, 1-36
functions provided 1-9, 1-32
DSPM/HC Card with FXO Interface
description 1-35
Hardware
-48V ringer/power supply card and
enclosure 1-38
DSPM/E&M Card 1-26
DSPM/FXS card 1-23, 1-32, 1-35
E1 dual port digital PBX interface card 1-9,
1-20
example of (figure) 1-36
function 1-35
jumpers 1-37
TI dual port digital PBX interface card 1-17
Hardware Components 1-8, 1-9
10 Base T Transceiver 1-41
back panel 1-16
LEDs 1-36
DSPM/SM Card
check 2-4
CMEM SIMM 1-13
enclosure 1-11
FLASH SIMM 1-13
front panel 1-11
LEDs 1-11
motherboard 1-12
numeric display 1-11
ports 1-12
cables required 1-25
cabling to T1/E1 cards 1-25
description 1-23
example of (figure) 1-24
jumpers
installing 1-24
locations 1-24
DSU
operation 3-7
signalling 3-8
power supply 1-11
DTE 3-5
I
E
I/O Expansion Card Slots 1-14
I/O Ports
E1 Dual Port Digital PBX Interface Card
description 1-20
cabling 3-22
IDL
DIP switches
idle 3-9
Input signals
location 1-21
settings 1-22
BPV 3-8
C+ 3-8
DL 3-8
NIS 3-8
example of (figure) 1-21
LED descriptions 1-22
slot restriction 1-20
Electromagnetic radiation
regulations 1-47
Installation
DIM module 3-12
guidelines 3-5
I/O card 3-16
rack-mount 2-5, 2-8
SIMMs 3-14, 3-15
software options 3-26
the PathBuilder S24x, 26x, and 27x switch 2-2
Enclosure 1-11
Ethernet Cable Pinouts A-6
Ethernet Port 4 Limitations 1-10
Expansion Card Slots 1-14
Expansion Port I/O Slots 1-14
EXT
clock 3-7
Index-2
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transceiver 3-23
Installing
Node
restarts 3-24
T1 dual port digital PBX interface card 3-17
warmstart 3-24
INT
Node coldstart 3-24
Node statistics 3-11
providing clock to the network 3-7
Numeric LED Display 1-11, C-1
J
O
Jumpers
on -48V ringer/power supply card
online technical services D-1
Operating Environment 2-2
Ordering connections
facility interface code 1-45
interface type 1-45
service code 1-45
USOC jack connector 1-45
Output signals
definitions 1-38
installing 1-38
locations 1-38
on DSPM/E&M card
defaults 1-29
definitions 1-29
for UK complex and two-wire Germany
complex impedance 1-30
installing 1-31
CL 3-9
CLK 3-9
locations 1-31
on DSPM/SM card
installing 1-24
IDL 3-9
RS 3-8
P
locations 1-24
Parameters
L
T1/E1 ports 5-7
LAN Connection 3-22
LEDs 1-11
PathBuilder S24x, 26x, and 27x switch
application examples 1-3
description 1-1
PathBuilder S24x, 26x, and 27x Switch
Backplane 1-16
PathBuilder S24x, 26x, and 27x switch Cable
Information A-1
PathBuilder S24x, 26x, and 27x switch cards
removing/replacing 4-9
PathBuilder S24x, 26x, and 27x Switch
Motherboard 1-12
PathBuilder S24x, 26x, and 27x switch Motherboard
replacing 4-12
PathBuilder S24x, 26x, and 27x switch Physical
Dimensions B-1
Pedestal base
remove 2-10
Performance Branch Node Example 1-3
DSPM/E&M card 1-28
DSPM/FXS card 1-34, 1-36
E1 dual port digital PBX interface card 1-22
Lithium battery 4-14
removing/replacing 4-14
LL
local loopback 3-8
Loopback 3-10
M
Mesh Network
cabling 3-27
diagram 3-28
Motherboard 1-12, 3-3
and SDB cable information A-2
DIP switches 3-3
expansion slots 1-14
ports 1-12
Pinouts A-1
Port
pinouts A-1
replacing 4-12
switches 3-11
Ports 1-12
function 1-15
network 1-14
numbers 1-14
N
serial 1-14
statistics 3-11
Power LED 1-11
Power Requirements B-1
Network Port 1-14
network supplier support D-2
NIS
not in service 3-8
Index-3
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Power Supply 1-11
Statistics
Channelized Data 5-1
removing/replacing 4-7
Status LEDs 1-11
Switch Block Settings 3-6
R
Rack-Mount
T
configuration 1-8
installation 2-5, 2-8
parts 2-6
Radio Frequency Interference Regulations 1-42
RAM 1-12
T1 Dual Port Digital PBX Interface Card
cables required 1-18
description 1-9, 1-17
DIP switches
installation 3-14
Regional Concentrator Example 1-4
Removing
Pedestal Base 2-10
SIMMs 3-15
Removing/Replacing
cover 4-3
location 1-18
setting 1-18
functions provided 1-17
LED descriptions 1-19
slot restriction 1-18
T1/CSU Daughter Card 1-18
T1/E1 connections
Front Panel Cover 4-5
Lithium Battery 4-14
PathBuilder S24x, 26x, and 27x Switch
Cards 4-9
Channelized Data 5-5
technical support
3Com URL D-1
bulletin board service D-2
fax service D-2
Power Supply 4-7
Replacing PathBuilder S24x, 26x, and 27x switch
Motherboard 4-12
Reset Switch 1-11
returning products for repair D-4
RFI Regulations 1-42
RS
network suppliers D-2
product repair D-4
Telecommunications Regulations 1-43
Telephone Company
information 1-46
Temperature, operating B-1
Top Cover
reset 3-8
removing/replacing 4-3
Transceiver
S
installation 3-23
Troubleshooting
Serial Port 1-14
Serial/Network Ports 1-14
Service LED 1-11
Setting
the switches 3-6
Signal Quality Error (SQE) 1-9, 1-41
SIMM
DSU internal loopback 3-11
guidelines 3-11
node statistics 3-11
port statistics 3-11
U
installation 3-14, 3-15
location 3-15
removal 3-15
Unpacking 2-4
URL D-1
slots 1-13
V
Single in-line memory module (see SIMM)
Software options
installation 3-26
Software Serial Number (SSN) 1-13
Special notices
Virtual Port Mapping Table
guidelines 5-20
parameters 5-21
Virtual Ports
booting 5-18
enabling 5-18
Virtual ports
description vii
Start
cold 3-24
default node command 3-25
warm 3-24
booting 5-18
configuring 5-18
Index-4
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disabling 5-18
W
Warm Restart 3-24
World Wide Web (WWW) D-1
Index-5
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Index-6
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