PA-4T+ Synchronous Serial Port
Adapter Installation and Configuration
Product Number: PA-4T+(=)
Platforms Supported: Cisco 7200 Series, Cisco 7000 Series
and Cisco 7500 Series with VIP2, Cisco uBR7200 Series,
Cisco 7100 Series
Note If you ordered this port adapter as a spare, for your convenience Cisco has included a port
adapter installation and configuration note for the Catalyst 5000 series Route Switch
Module/Versatile Interface Processor 2 (RSM/VIP2). Your port adapter is fully compatible with the
RSM/VIP2.
Corporate Headquarters
Cisco Systems, Inc.
170 West Tasman Drive
San Jose, CA 95134-1706
USA
Tel: 408 526-4000
800 553-NETS (6387)
Fax: 408 526-4100
Text Part Number: 78-4159-07
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C H A P T E R 1
Overview
This chapter describes the PA-4T+ port adapter and describes its LEDs, cables, and receptacles. This
chapter contains the following sections:
• Port Adapter Overview, page 1-1
• Synchronous Serial Overview, page 1-3
• Serial Interface Specifications, page 1-4
• Cables and Pinouts, page 1-5
• LEDs, page 1-15
Port Adapter Overview
The PA-4T+ provides the following electrical interfaces: EIA/TIA-232, EIA/TIA-449, EIA-530.
X.21, and V.35. Each interface complies with its specific interface specifications. The cable attached
to each PA-4T+ port adapter’s interface ports determines its type (EIA/TIA-232, and so forth) and
its mode (data communications equipment [DCE] or data terminal equipment [DTE]).
Note The PA-4T+ provides enhanced performance over the PA-4T. To determine if a PA-4T+ or
PA-4T is installed in your router, view the port adapters’ faceplate labels (refer to Figure 1-1 and
Figure 1-2, respectively) or use the show diag command to view installed interface types.
Figure 1-1
PA-4T+ —Faceplate View
FAST SERIAL, ENHANCED
Overview 1-1
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Port Adapter Overview
Figure 1-2
PA-4T Port Adapter—Faceplate View
FAST SERIAL
The following example of the show diag slot command shows a PA-4T+ in port adapter slot 0
(PA Bay 0) and a PA-4T in port adapter slot 1 (PA Bay 1) on a VIP2 that is in interface processor
slot 3 in a Cisco 7500 series router.
Note In the following examples, the PA-4T+ is displayed as Mx serial.
Router# show diag 3
Slot 3:
Physical slot 3, ~physical slot 0x6, logical slot 3, CBus 0
Microcode Status 0xC
Master Enable, LED, WCS Loaded
Board is analyzed
Pending I/O Status: Console I/O
EEPROM format version 1
VIP2 controller, HW rev 2.2, board revision UNKNOWN
Serial number: 03517093 Part number: 73-1684-03
Test history: 0x00
RMA number: 00-00-00
Flags: cisco 7000 board; 7500 compatible
EEPROM contents (hex):
0x20: 01 15 02 03 00 35 AA A5 49 06 94 03 00 00 00 00
0x30: 50 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Slot database information:
Flags: 0x4
Insertion time: 0x5314 (01:20:55 ago)
Controller Memory Size: 8 MBytes DRAM, 1024 KBytes SRAM
PA Bay 0 Information:
Mx serial PA, 4 ports
EEPROM format version 1
HW rev 1.0, Board revision 154
Serial number: 03699540 Part number: 73-1577-03
PA Bay 1 Information:
Fast-Serial PA, 4 ports
EEPROM format version 1
HW rev 1.0, Board revision 4
Serial number: 02827523 Part number: 73-3417-04
1-2
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Synchronous Serial Overview
The following example of the show diag slot command shows a PA-4T+ in port adapter slot 1 in a
Cisco 7200 series or a cisco uBR7200 series router:
Router# show diag 1
Slot 1:
Mx serial port adapter, 4 ports
Port adapter is analyzed
Port adapter insertion time 02:19:52 ago
Hardware revision 1.0
Board revision UNKNOWN
Serial number
Test history
3701161
0x0
Part number
RMA number
73-1577-03
00-00-00
EEPROM format version 1
EEPROM contents (hex):
0x20: 01 0C 01 00 00 38 79 A9 49 06 29 03 00 00 00 00
0x30: 05 00 00 00 FF FF FF 00 FF FF FF FF FF FF FF FF
The following example of the show diag slot command shows a PA-4T in port adapter slot 1 in a
Cisco 7100 series router:
Router# show diag 1
Slot 3:
Serial port adapter, 4 ports
Port adapter is analyzed
Port adapter insertion time 02:19:52 ago
EEPROM contents at hardware discovery:
Hardware revision 1.0
Board revision A0
Serial number
Test history
37296561
0x0
Part number
RMA number
73-1556-04
00-00-00
EEPROM format version 1
EEPROM contents (hex):
0x20: 01 11 01 00 00 A4 19 EC 49 06 98 04 00 00 00 00
0x30: 50 00 00 00 98 10 21 00 FF FF FF FF FF FF FF FF
Synchronous Serial Overview
The PA-4T+ provides four channel-independent, synchronous serial ports that support full-duplex
operation at T1 (1.544-Mbps) and E1 (2.048-Mbps) speeds. Each port supports any of the available
interface types: Electronics Industries Association/Telecommunications Industries Association
(EIA/TIA)-232, EIA/TIA-449, V.35, X.21, and EIA-530.
EIA/TIA-232, which is by far the most common interface standard in the U.S., supports unbalanced
circuits at signal speeds up to 64 kbps. EIA/TIA-449, which supports balanced (EIA/TIA-422) and
unbalanced (EIA/TIA-423) transmissions, is a faster (up to 2 Mbps) version of EIA/TIA-232 that
provides more functions and supports transmissions over greater distances. The EIA/TIA-449
standard was intended to replace EIA/TIA-232, but it was not widely adopted.
Note The EIA/TIA standards were referred to as recommended standards called RS-232 and
RS-449 prior to their acceptance by the ANSI committee.
The resistance to convert to EIA/TIA-449 was due primarily to the large installed base of DB-25
hardware and to the larger size of the 37-pin EIA/TIA-449 connectors, which limited the number of
connections possible (fewer than is possible with the smaller, 25-pin EIA/TIA-232 connector).
EIA-530, which supports balanced transmission, provides the increased functionality, speed, and
distance of EIA/TIA-449 on the smaller, DB-25 connector used for EIA/TIA-232. The EIA-530
standard was created to support the more sophisticated circuitry of EIA/TIA-449 on the large
number of existing EIA/TIA-232 (DB-25) hardware instead of the larger, 37-pin connectors used for
Overview 1-3
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Serial Interface Specifications
EIA/TIA-449. Like EIA/TIA-449, EIA-530 refers to the electrical specifications of EIA/TIA-422
and EIA/TIA-423. The specification recommends a maximum speed of 2 Mbps. EIA-530 is used
primarily in the United States.
The V.35 interface is most commonly used in the United States and throughout Europe, and is
recommended for speeds up to 48 kbps. The X.21 interface uses a 15-pin connection for balanced
circuits and is commonly used in the United Kingdom to connect public data networks. X.21
relocates some of the logic functions to the data terminal equipment (DTE) and data
communications equipment (DCE) interfaces and, as a result, requires fewer circuits and a smaller
connector than EIA/TIA-232.
All interface types except EIA-530 can be individually configured for operation with either external
(DTE mode) or internal (DCE mode) timing signals; EIA-530 operates with external timing only. In
addition, all VIP2 serial interface types support nonreturn to zero (NRZ) and nonreturn to zero
inverted (NRZI) format, and both 16-bit and 32-bit cyclic redundancy checks (CRCs). The default
configuration is for NRZ format and 16-bit CRC. You can change the default settings with software
commands. (For more information, see the Chapter 8, “Configuring the PA-4T+ Interfaces.”)
There is no default mode or clock rate set on the VIP2 serial ports, although an internal clock signal
is present on all ports for DCE support. The internal clock also allows you to perform local loopback
tests without having to terminate the port or connect a cable. (All interface types except X.21 DTE
support loopback.) To use the port as a DCE interface, you must set the clock rate and connect a DCE
adapter cable. To use the port as a DTE interface, you need only connect a DTE adapter cable to the
port. Because the serial adapter cables determine the mode and interface type, the PA-4T+ interface
becomes a DTE when a DTE cable is connected to it.
If a DTE cable is connected to a port with a clock rate set, the DTE ignores the clock rate and uses
the external clock signal that is sent from the remote DCE. For a brief description of the clockrate
command, see Chapter 8, “Configuring the PA-4T+ Interfaces.” For complete command descriptions
and instructions, see the publications listed in the section “Related Documentation” section on
page vi.
Serial Interface Specifications
The PA-4T+ provides up to four synchronous serial interfaces. Each interface allows a maximum
bandwidth of 2.048 Mbps; the speed depends on the type of electrical interface used. Use
EIA/TIA-232 for speeds of 64 kilobits per second (kbps) and below, and use X.21, EIA/TIA-449,
V.35, or EIA-530 for higher speeds.
Serial signals can travel a limited distance at any given bit rate; generally, the slower the baud rate,
the greater the distance. All serial signals are subject to distance limits beyond which a signal
degrades significantly or is completely lost.
Table 1-1 lists the recommended (standard) maximum speeds and distances for each PA-4T+ serial
interface type. The recommended maximum rate for V.35 is 2.048 Mbps.
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Cables and Pinouts
Table 1-1
Standards for Transmission Speed Versus Distance
EIA/TIA-232
Distances
EIA/TIA-449, X.21, V.35, EIA-530
Distances
Rate (bps)
2400
Feet
200
100
50
Meters
Feet
4,100
2,050
1,025
513
Meters
1,250
625
312
156
78
60
30
15
7.6
3.7
2.6
–
4800
9600
19200
25
38400
12
256
56000
8.6
–
102
31
1544000 (T1)
50
15
Balanced drivers allow EIA/TIA-449 signals to travel greater distances than EIA/TIA-232. The
recommended distance limits for EIA/TIA-449 shown in Table 1-1 are also valid for V.35, X.21, and
EIA-530. EIA/TIA-449 and EIA-530 support 2.048-Mbps rates, and V.35 supports 2.048-Mbps
rates without any problems; we do not recommend exceeding published specifications for
transmission speed versus distance. Do so at your own risk.
Cables and Pinouts
The following sections describe the serial receptacles on the PA-4T+, and the cables and pinouts for
the various serial interface cables.
PA-4T+ Receptacles and Cables
The PA-4T+ and adapter cables allow a high density of interface ports, regardless of the size of the
connectors typically used with each electrical interface type. All ports use an identical 60-pin D-shell
receptacle that supports all interface types: EIA/TIA-232, V.35, EIA/TIA-449, X.21, and EIA-530.
Each port requires a serial adapter cable, which provides the interface between the high-density
serial port and the standard connectors that are commonly used for each electrical interface type.
Note The adapter cable determines the electrical interface type and mode of the port (DTE or DCE)
to which it is connected.
The network end of the cable is an industry-standard connector for the type of electrical interface
that the cable supports. For most interface types, the adapter cable for DTE mode uses a plug at the
network end, and the cable for DCE mode uses a receptacle at the network end. Exceptions are V.35
adapter cables, which are available with either a V.35 plug or a receptacle for either mode, and the
EIA-530 adapter cable, which is available only in DTE mode with a DB-25 plug at the network end.
The mode is labeled on the molded plastic connector shell at the ends of all cables except V.35
(which uses the standard Winchester block-type connector instead of a molded plastic D shell).
Following are the available interface cable options (and product numbers) for the mode and
network-end connectors for each cable:
• EIA/TIA-232: DTE mode with a DB-25 plug (CAB-232MT=); DCE mode with a DB-25
receptacle (CAB-232FC=).
Overview 1-5
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Cables and Pinouts
• EIA/TIA-449: DTE mode with a 37-pin D-shell plug (CAB-449MT=); DCE mode with a 37-pin
D-shell receptacle (CAB-449C=).
• V.35: DTE mode or DCE mode with a 34-pin Winchester-type V.35 plug (CAB-V35MT= or
CAB-V35MC=); DTE mode or DCE mode with a 34-pin Winchester-type V.35 receptacle
(CAB-V35FT= or CAB-V35FC=). Also available is a cable with a male DB-60 plug on the router
end and a male DB-34 shielded plug on the network end (CAB-V35MTS=).
• X.21: DTE mode with a DB-15 plug (CAB-X21MT=); DCE mode with a DB-25 receptacle
(CAB-X21FC=).
• EIA-530: DTE mode with a DB-25 plug (CAB-530MT=).
Note For cable pinouts, see the “PA-4T+ Port Adapter Cable Pinouts” section on page 1-9.
Figure 1-3 shows the serial port adapter cables for connection from the PA-4T+ port adapters to your
network.
Figure 1-3
Serial Port Adapter Cables
(PA-4T+ port adapter)
Router connections
EIA/TIA-232
EIA/TIA-449
V.35
X.21
EIA-530
Network connections at the modem or CSU/DSU
Metric (M3) thumbscrews are included with each port adapter cable to allow connections to devices
that use metric hardware. Because the PA-4T+ uses a special, high-density port that requires special
adapter cables for each electrical interface type, we recommend that you obtain serial interface
cables from the factory.
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PA-4T+ Receptacles and Cables
EIA/TIA-232 Connections
The router end of all EIA/TIA-232 adapter cables is a high-density 60-pin plug. The network end of
the adapter cable is a standard 25-pin D-shell connector (known as a DB-25) that is commonly used
for EIA/TIA-232 connections. Figure 1-4 shows the connectors at the network end of the adapter
cable.
Note The system console and auxiliary ports on the Route Switch Processor (RSP) in the
Cisco 7500 series also use EIA/TIA-232 connections; however, the PA-4T+ interfaces support
synchronous serial connections, and the console and auxiliary ports only support asynchronous
connections. Use caution when connecting EIA/TIA-232 cables to the PA-4T+ receptacles.
Note Do not use the Cisco Systems-provided EIA/TIA-232 adapter cable CAB-232MT= to
connect a PA-4T+ interface that is configured for DTE mode directly to an NEC - NEXTSTAR 1E
model C4969 MD/SAC unit interface that is configured for DCE mode. Doing so will keep transmit
and receive data signals from being properly exchanged between the two interfaces.
Instead, you must connect an additional, intermediate adapter cable—with standard EIA/TIA-232
DB-25 connectors at both ends—from the network end of CAB-232MT= to the standard
EIA/TIA-232 DB-25 connector (the DCE interface) on the NEC - NEXTSTAR 1E model C4969
MD/SAC unit. Cisco Systems does not provide this additional cable; however, its signals and pin
assignments are listed in Table 1-3.
Note You can use the Cisco Systems-provided EIA/TIA-232 adapter cable CAB-232FC= to
connect a PA-4T+ interface that is configured for DCE mode directly to an NEC - NEXTSTAR 1E
model C4969 MD/SAC unit interface that is configured for DTE mode.
Figure 1-4
EIA/TIA-232 Adapter Cable Connectors
DTE
DCE
Overview 1-7
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Cables and Pinouts
EIA/TIA-449 Connections
The router end of all EIA/TIA-449 adapter cables is a high-density 60-pin plug. The network end of
the adapter cable provides a standard 37-pin D-shell connector, which is commonly used for
EIA/TIA-449 connections. Figure 1-5 shows the connectors at the network end of the adapter cable.
EIA/TIA-449 cables are available as either DTE (DB-37 plug) or DCE (DB-37 receptacle).
Figure 1-5
EIA/TIA-449 Adapter Cable Connectors
DTE
DCE
V.35 Connections
The router end of all V.35 adapter cables is a high-density 60-pin plug. The network end of the
adapter cable provides a standard 34-pin Winchester-type connector commonly used for V.35
connections. Figure 1-6 shows the connectors at the network end of the V.35 adapter cable. V.35
cables are available with a standard V.35 plug for DTE mode (CAB-V35MT=) or a V.35 receptacle
for DCE mode (CAB-V35FC=).
Figure 1-6
V.35 Adapter Cable Connectors
DTE
DCE
Note Also available, but not shown in Figure 1-6, are CAB-V35MC=, a V.35 cable with a plug on
the network end for DCE mode, and CAB-V35FT=, a V.35 cable with a receptacle on the network
end for DTE mode. These cables are used for connecting V.35-equipped systems back to back.
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PA-4T+ Port Adapter Cable Pinouts
X.21 Connections
The router end of all X.21 adapter cables is a high-density 60-pin plug. The network end of the
adapter cable is a standard DB-15 connector. Figure 1-7 shows the connectors at the network end of
the X.21 adapter cable. X.21 cables are available as either DTE (DB-15 plug) or DCE (DB-15
receptacle).
Figure 1-7
X.21 Adapter Cable Connectors
DTE
1
8
DCE
9
15
EIA-530 Connections
The EIA-530 adapter cable is available in DTE mode only. The router end of the EIA-530 adapter
cable is a high-density 60-pin plug. The network end of the adapter cable is a standard DB-25 plug
commonly used for EIA/TIA-232 connections. Figure 1-8 shows the DB-25 connector at the
network end of the adapter cable.
Figure 1-8
EIA-530 Adapter Cable Connector
DTE
PA-4T+ Port Adapter Cable Pinouts
The PA-4T+ supports EIA/TIA-232, EIA/TIA-449, X.21, V.35, and EIA-530 serial interfaces. All
PA-4T+ ports use a a 60-pin receptacle that supports all available interface types. A special serial
adapter cable determines the electrical interface type and mode of the interface. The router end of all
of the adapter cables has a 60-pin plug; the connectors at the network end are the standard connectors
used for the respective interfaces. All interface types except EIA-530 are available in DTE or DCE
format: DTE with a plug at the network end and DCE with a receptacle at the network end. V.35 is
available in either mode with either gender at the network end. EIA-530 is available in DTE only.
The tables that follow list the signal pinouts for both the DTE and DCE mode serial port adapter
cables, for each of the following PA-4T+ interface types:
• EIA/TIA-232 pinouts, Table 1-2
• EIA/TIA-449 pinouts, Table 1-4
• EIA-530 pinouts, Table 1-5
• V.35 pinouts, Table 1-6
• X.21 pinouts, Table 1-7
Overview 1-9
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Cables and Pinouts
Table 1-2
EIA/TIA-232 Adapter Cable Signals
DTE Cable (CAB-232MT=)
DCE Cable (CAB-232FC=)
1
Router End, HD
Network End,
DB-25 Plug
Router End, HD
60-Position Plug
Network End,
DB-25 Receptacle
60-Position Plug
Signal
Pin
46
41
36
42
35
34
45
33
37
38
44
43
39
Pin Signal
Signal
Pin
46
36
41
35
42
43
45
44
39
40
33
34
38
Pin Signal
Shield ground
TxD/RxD
RxD/TxD
RTS/CTS
CTS/RTS
DSR/DTR
Circuit ground
DCD/LL
1
2
3
4
5
6
7
8
Shield ground
TxD
Shield ground
RxD/TxD
TxD/RxD
CTS/RTS
RTS/CTS
DTR/DSR
Circuit ground
LL/DCD
1
2
3
4
5
6
7
8
Shield ground
TxD
—>
<—
—>
<—
<—
<—
—>
<—
—>
—>
RxD
RxD
RTS
RTS
CTS
CTS
DSR
DSR
Circuit ground
DCD
Circuit ground
DCD
<—
—>
TxC/NIL
<— 15
<— 17
—> 18
—> 20
—> 24
TxC
TxCE/TxC
NIL/RxC
—> 15
—> 17
<— 18
<— 20
<— 24
TxC
RxC/TxCE
LL/DCD
RxC
RxC
LTST
DCD/LL
LTST
DTR/DSR
TxCE/TxC
DTR
DSR/DTR
RxC/TxCE
DTR
TxCE
TxCE
Mode 0
Ground
Mode_DCE
50
51
52
Mode 0
Ground
50
51
Shorting group
Shorting group
1
HD = high density.
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PA-4T+ Port Adapter Cable Pinouts
Table 1-3
Intermediate Adapter Cable Signals (for Connecting a PA-4T+ to a
NEC - NEXTSTAR 1E Model C4969 MD/SAC Unit)
Router (DTE) End,
DB-25 Receptacle
Network (DCE) End,
DB-25 Plug
Signal
Shield ground
TxD
Pin
1
Pin Signal
1
2
3
4
5
6
7
8
Shield ground
TxD
2
—>
<—
—>
<—
<—
RxD
3
RxD
RTS
4
RTS
CTS
5
CTS
DSR
6
DSR
Circuit ground
DCD
7
Circuit ground
DCD
8
<—
TxC, RxC
–
15, 17 <— 15
TxC
–
<— 17
—> 18
—> 20
—> 24
RxC
LTST
18
20
24
LTST
DTR
DTR
TxCE
TxCE
Shorting group
Shorting group
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Cables and Pinouts
Table 1-4
EIA/TIA-449 Adapter Cable Signals
DTE Cable (CAB-449MT=)
DCE Cable (CAB-449C=)
1
Router End, HD
Network End,
DB-37 Plug
Router End, HD
60-Position Plug
Network End,
DB-37 Receptacle
60-Position Plug
Signal
Pin
46
11
12
24
23
28
27
9
Pin Signal
Signal
Pin
46
28
27
13
14
11
12
1
Pin Signal
Shield ground
TxD/RxD+
TxD/RxD–
TxC/RxC+
TxC/RxC–
RxD/TxD+
RxD/TxD–
RTS/CTS+
RTS/CTS–
RxC/TxCE+
RxC/TxCE–
CTS/RTS+
CTS/RTS–
LL/DCD
1
4
Shield ground
SD+
Shield ground
RxD/TxD+
RxD/TxD–
TxCE/TxC+
TxCE/TxC–
TxD/RxD+
TxD/RxD–
CTS/RTS+
CTS/RTS–
TxC/RxC+
TxC/RxC–
RTS/CTS+
RTS/CTS–
NIL/LL
1
4
Shield ground
SD+
—>
<—
—> 22
<—
<— 23
<—
<— 24
—>
—> 25
<—
<— 26
<—
SD–
<— 22
—>
—> 23
—>
—> 24
<—
<— 25
—>
—> 26
—>
SD–
5
ST+
5
ST+
ST–
ST–
6
RD+
RD–
RS+
6
RD+
RD–
RS+
7
7
10
26
25
1
RS–
2
RS–
8
RT+
24
23
9
8
RT+
RT–
RT–
9
CS+
9
CS+
2
<— 27
—> 10
37
CS–
10
29
30
7
—> 27
—> 10
37
CS–
44
45
3
LL
LL
Circuit ground
DSR/DTR+
DSR/DTR–
DTR/DSR+
DTR/DSR–
DCD/DCD+
DCD/DCD–
TxCE/TxC+
TxCE/TxC–
Circuit ground
Circuit ground
SC
Circuit ground
DTR/DSR+
DTR/DSR–
DSR/DTR+
DSR/DTR–
DCD/DCD+
DCD/DCD–
RxC/TxCE+
RxC/TxCE–
Circuit ground
Circuit ground
SC
<— 11
<— 29
—> 12
—> 30
<— 13
<— 31
—> 17
—> 35
19
ON+
ON–
TR+
—> 11
—> 29
<— 12
<— 30
—> 13
—> 31
<— 17
<— 35
19
ON+
ON–
TR+
4
8
7
3
8
TR–
4
TR–
5
RR+
RR–
5
RR+
RR–
6
6
13
14
15
16
TT+
26
25
15
16
TT+
TT–
TT–
SG
SG
20
RC
20
RC
Mode 1
Ground
49
48
Shorting group
Mode 1
Ground
49
48
Shorting group
Ground
Mode_DCE
51
52
Shorting group
1
HD = high density.
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PA-4T+ Port Adapter Cable Pinouts
Table 1-5
EIA-530 DTE Adapter Cable Signals (CAB-530MT=)
1
Router End, HD
60-Position Plug
Network End,
DB-25 Plug
Signal
Pin
46
11
12
28
27
9
Pin Signal
Shield ground
TxD/RxD+
TxD/RxD–
RxD/TxD+
RxD/TxD–
RTS/CTS+
RTS/CTS–
CTS/RTS+
CTS/RTS–
DSR/DTR+
DSR/DTR–
DCD/DCD+
DCD/DCD–
TxC/RxC+
TxC/RxC–
RxC/TxCE+
RxC/TxCE–
LL/DCD
1
2
Shield ground
TxD+
—>
—> 14
<—
<— 16
—>
—> 19
<—
<— 13
<—
<— 22
<—
TxD–
3
RxD+
RxC–
4
RTS+
10
1
RTS–
5
CTS+
2
CTS–
3
6
DSR+
DSR–
4
5
8
DCD+
DCD–
TxC+
6
<— 10
<— 15
<— 12
<— 17
24
23
26
25
44
45
7
TxC–
RxC+
<—
9
RxC–
—> 18
7
LL
Circuit ground
DTR/DSR+
DTR/DSR–
TxCE/TxC+
TxCE/TxC–
Circuit ground
DTR+
DTR–
TxCE+
TxCE–
—> 20
—> 23
—> 24
—> 11
8
13
14
Mode_1
Ground
Mode_2
49
48
47
Shorting group
Shorting group
Ground
Mode_DCE
51
52
1
HD = high density.
Overview 1-13
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Cables and Pinouts
Table 1-6
V.35 Adapter Cable Signals
DTE Cable (CAB-V35FT= or CAB-V35MT=)
DCE Cable (CAB-V35FC= or CAB-V35MC=)
Network End,
1
Router End, HD
60-Position Plug
Network End,
34-Position Plug
Router End, HD
60-Position Plug
34-Position
Receptacle
Signal
Pin
46
45
42
35
34
33
43
44
18
17
28
27
20
19
26
25
24
23
Pin Signal
Signal
Pin
46
45
35
42
43
44
34
33
28
27
18
17
26
25
22
21
20
19
Pin
A
B
C
D
E
Signal
Frame ground
Circuit ground
RTS
Shield ground
Circuit ground
RTS/CTS
A
B
C
D
E
Frame ground
Circuit ground
RTS
Shield ground
Circuit ground
CTS/RTS
—>
<—
<—
<—
—>
—>
—>
—>
<—
<—
—>
—>
<—
<—
<—
<—
—>
—>
—>
<—
<—
<—
<—
—>
—>
<—
<—
—>
—>
—>
CTS/RTS
CTS
RTS/CTS
CTS
DSR/DTR
DCD/LL
DSR
DTR/DSR
LL/DCD
DSR
F
RLSD
DTR
F
RLSD
DTR
DTR/DSR
LL/DCD
H
K
P
DSR/DTR
DCD/LL
H
K
P
LT
LT
TxD/RxD+
TxD/RxD–
RxD/TxD+
RxD/TxD–
TxCE/TxC+
TxCE/TxC–
RxC/TxCE+
RxC/TxCE–
TxC/RxC+
TxC/RxC–
SD+
RxD/TxD+
RxD/TxD–
TxD/RxD+
TxD/RxD–
RxC/TxCE+
RxC/TxCE–
NIL/RxC+
NIL/RxC–
TxCE/TxC+
TxCE/TxC–
SD+
S
SD–
S
SD–
R
T
RD+
R
T
RD+
RD–
RD–
U
W
V
X
Y
SCTE+
SCTE–
SCR+
U
W
V
x
SCTE+
SCTE–
SCR+
SCR–
SCR–
SCT+
Y
SCT+
<— AA
SCT–
—> AA
SCT–
Mode 1
Ground
49
48
Shorting group
Mode 1
Ground
49
48
Shorting group
Mode 0
Ground
Mode_DCE
50
51
52
Shorting group
Shorting group
Mode 0
Ground
50
51
Shorting group
Shorting group
TxC/NIL
RxC/TxCE
RxC/TxD
Ground
53
54
55
56
TxC/NIL
RxC/TxCE
RxC/TxD
Ground
53
54
55
56
1
HD = high density.
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LEDs
Table 1-7
X.21 Adapter Cable Signals
DTE Cable (CAB-X21MT=)
DCE Cable (CAB-X21FC=)
1
Router End, HD
Network End,
DB-15 Plug
Router End, HD
60-Position Plug
Network End,
DB-15 Receptacle
60-Position Plug
Signal
Pin
46
11
12
9
Pin Signal
Signal
Pin
46
11
12
9
Pin Signal
Shield ground
TxD/RxD+
TxD/RxD–
RTS/CTS+
RTS/CTS –
RxD/TxD+
RxD/TxD–
CTS/RTS+
CTS/RTS –
RxC/TxCE+
RxC/TxCE–
Circuit ground
1
Shield ground
Transmit+
Transmit–
Control+
Shield ground
RxD/TxD+
RxD/TxD–
CTS/RTS+
CTS/RTS –
TxD/RxD+
TxD/RxD–
RTS/CTS+
RTS/CTS–
TxC/RxC+
TxC/RxC –
Circuit ground
1
Shield ground
Transmit+
Transmit–
Control+
—>
—>
—>
—>
<—
<—
<—
<—
<—
<—
2
—>
—>
—>
—>
<—
<—
<—
<—
<—
<—
2
9
9
3
3
10
28
27
1
10
4
Control–
10
28
27
1
10
4
Control–
Receive+
Receive+
11
5
Receive–
11
5
Receive–
Indication+
Indication–
Timing+
Indication+
Indication–
Timing+
2
12
6
2
12
6
26
25
15
26
25
15
13
8
Timing–
13
8
Timing–
Circuit ground
Shorting group
Circuit ground
Ground
Mode_2
48
47
Ground
Mode_2
48
47
Shorting
group
Ground
Mode_DCE
51
52
Shorting group
Ground
Mode_DCE
51
52
1
HD = high density.
LEDs
The PA-4T+ contains the enabled LED, standard on all port adapters, and one status LED for each
port. After system initialization, the enabled LED goes on to indicate that the PA-4T+ has been
enabled for operation. (The LEDs are shown in Figure 1-9.)
Figure 1-9
LEDs on the PA-4T+—Horizontal Orientation
The following conditions must be met before the PA-4T+ is enabled:
• The port adapter is correctly connected to the backplane midplane and receiving power.
• A valid system software image for the port adapter has been downloaded successfully.
• The system software recognizes the port adapter or VIP2 with an installed PA-4T+.
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LEDs
If any of the above conditions are not met, or if the initialization fails for other reasons, the enabled
LED will not go on. Table 1-8 lists port LED status indications.
Table 1-8
PA-4T+ Port LEDs
LED Label Color
State
On
Function
EN
TD
Green
Green
Indicates ports are ready.
DTE—Transmit data out.
DCE—Transmit data in.
DTE—Transmit clock in.
DCE—Transmit clock in (TXCE).
DTE—Receive data in.
On
TC
Green
Green
Green
On
On
On
RD
DCE—Receive data out.
DTE—Receive clock in.
DCE—Receive clock out.
Indicates DTR, DSR, RTS, CTS, or DCD is active.
RC
LB/CD
Green
Green
On
Flashing
Indicates RTS, CTS, or DCD is sending and receiving
data in half-duplex mode.
Yellow
On
Indicates local loop or internal loop active.
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Preface
This preface describes the objectives and organization of this document and explains how to find
additional information on the PA-4T+ port adapter and other Cisco products and services. This
preface contains the following sections:
• Objectives, page v
• Document Organization, page vi
• Related Documentation, page vi
• Cisco Connection Online, page vii
• Documentation CD-ROM, page viii
Objectives
This document describes how to install and configure the PA-4T+ synchronous serial port adapter
(PA-4T+[=]), which is used in the following platforms:
• Second-generation Versatile Interface Processor (VIP2) in Cisco 7500 series routers and
Cisco 7000 series routers with the Cisco 7000 Series Route Switch Processor (RSP7000) and
Cisco 7000 Series Chassis Interface (RSP7000CI)
• Cisco 7200 series routers—which consist of the two-slot Cisco 7202, the four-slot Cisco 7204
and Cisco 7204VXR, and the six-slot Cisco 7206 and Cisco 7206VXR
• Cisco uBR7200 series universal broadband routers—which consist of the six-slot Cisco
uBR7246 and the three-slot Cisco uBR7223
• Cisco 7100 series routers—which consist of the Cisco 7120 series and Cisco 7140 series
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Document Organization
Document Organization
This document is organized into the following chapters:
Section
Chapter 1
Title
Overview
Description
Describes the PA-4T+ port adapter, illustrates their
location in the supported hardware platforms, and
describes its LED displays, cables, and receptacles.
Chapter 2
Chapter 3
Preparing for Installation
Describes safety considerations, tools required, and
procedures you should perform before the actual
installation.
VIP2 and the
PA-4T+ Port Adapter
Provides instructions for installing the PA-4T+ port
adapter on a VIP2 interface processor installed in a
Cisco 7500 or Cisco 7000 series router.
Chapter 4
Chapter 5
Cisco 7200 Series and the
PA-4T+ Port Adapter
Provides instructions for installing the PA-4T+ port
adapter in a Cisco 7200 series router.
Cisco uBR7200 Series and the
PA-4T+ Port Adapter
Provides instructions for installing the PA-4T+ port
adapter in a Cisco uBR7200 series universal
broadband router.
Chapter 6
Chapter 7
Chapter 8
Cisco 7100 Series and the
PA-4T+ Port Adapter
Provides instructions for installing the PA-4T+ port
adapter in Cisco 7100 series routers.
Installing the PA-4T+ Interface
Cables
Provides instructions for installing port adapter
cables on the supported platforms.
Configuring the PA-4T+
Interfaces
Provides instructions for configuring your port
adapter on the supported platforms. The instructions
given in this chapter apply to all supported platforms
described in this document.
Related Documentation
Your router and the Cisco IOS software running on it contain extensive features and functionality,
which are documented in the following resources:
• For Cisco IOS software configuration information and support, refer to the modular
configuration and modular command reference publications in the Cisco IOS software
configuration documentation set that corresponds to the software release installed on your
Cisco hardware.
Note You can access Cisco IOS software configuration and hardware installation and
• For hardware installation and maintenance information on the Cisco 7000 series and Cisco 7500
series routers, and the VIP2, refer to the following publications:
— The installation and configuration guide that shipped with your Cisco 7000 series or
Cisco 7500 series router
— Second-Generation Versatile Interface Processor (VIP2) Installation and Configuration (for
VIP2 users only)
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Cisco Connection Online
• For hardware installation and maintenance information on the Cisco 7100 series routers, refer to
the Cisco 7100 Series VPN Router Configuration Guide publication that shipped with your
Cisco 7100 series router
• For information on setting up a Virtual Private Network, see the Cisco 7100 Series VPN
Configuration Guide.
• For hardware installation and maintenance information on the Cisco 7200 series routers, refer to
the Cisco 7200 Series Installation and Configuration Guide that shipped with your
Cisco 7200 series router.
• For hardware installation and maintenance information on the Cisco 7200 VXR routers, refer to
the Cisco 7200 VXR Installation and Configuration Guide publication that shipped with your
Cisco 7200 VXR router.
• For hardware installation and maintenance information on the Cisco uBR7200 series, refer to the
Cisco uBR72xx Series Universal Broadband Router Installation and Configuration Guide that
shipped with your Cisco uBR7200 series universal broadband router.
• For international agency compliance, safety, and statutory information for WAN interfaces for
the Cisco 7500 series, Cisco 7000 series, Cisco 7200 series, Cisco uBR7200 series universal
broadband routers, and the Cisco 7100 series routers, refer to the following publications:
— Regulatory Compliance and Safety Information for the Cisco 7500 Series Routers.
— Regulatory Compliance and Safety Information for the Cisco 7000 Series Routers.
— Regulatory Compliance and Safety Information for the Cisco 7200 Series Routers.
— Regulatory Compliance and Safety Information for the Cisco uBR72xx Series Universal
Broadband Router
— Regulatory Compliance and Safety Information for the Cisco 7100 Series VPN Routers
• To view Cisco documentation or obtain general information about the documentation, see the
“Documentation CD-ROM” section on page vi, the next section “Cisco Connection Online”, or
call customer service at 800 553-6387 or 408 526-7208. Customer service hours are 5:00 a.m. to
6:00 p.m. Pacific time, Monday through Friday (excluding Cisco-observed holidays). You can
also send e-mail to [email protected].
Cisco Connection Online
Cisco Connection Online (CCO) is Cisco Systems’ primary, real-time support channel. Maintenance
customers and partners can self-register on CCO to obtain additional information and services.
Available 24 hours a day, 7 days a week, CCO provides a wealth of standard and value-added
services to Cisco’s customers and business partners. CCO services include product information,
product documentation, software updates, release notes, technical tips, the Bug Navigator,
configuration notes, brochures, descriptions of service offerings, and download access to public and
authorized files.
CCO serves a wide variety of users through two interfaces that are updated and enhanced
simultaneously: a character-based version and a multimedia version that resides on the World Wide
Web (WWW). The character-based CCO supports Zmodem, Kermit, Xmodem, FTP, and Internet
e-mail, and it is excellent for quick access to information over lower bandwidths. The WWW version
of CCO provides richly formatted documents with photographs, figures, graphics, and video, as well
as hyperlinks to related information.
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Documentation CD-ROM
You can access CCO in the following ways:
Telnet: cco.cisco.com
Modem: From North America, 408 526-8070; from Europe, 33 1 64 46 40 82. Use the following
terminal settings: VT100 emulation; databits: 8; parity: none; stop bits: 1; and connection rates up
to 28.8 kbps.
For a copy of CCO’s Frequently Asked Questions (FAQ), contact [email protected]. For
additional information, contact [email protected].
If you are a network administrator and need personal technical assistance with a Cisco product that
is under warranty or covered by a maintenance contract, contact Cisco’s Technical Assistance Center
Cisco Systems, Cisco products, or upgrades, contact 800 553-6387, 408 526-7208, or
Documentation CD-ROM
Cisco documentation and additional literature are available in a CD-ROM package, which ships with
your product. The Documentation CD-ROM, a member of the Cisco Connection Family, is updated
monthly. Therefore, it might be more current than printed documentation. To order additional copies
of the Documentation CD-ROM, contact your local sales representative or call customer service.
The CD-ROM package is available as a single package or as an annual subscription. You can also
If you are reading Cisco product documentation on the World Wide Web, you can submit comments
electronically. Click Feedback in the toolbar and select Documentation. After you complete the
form, click Submit to send it to Cisco. We appreciate your comments.
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C H A P T E R 2
Preparing for Installation
This chapter describes the general equipment, safety, and site preparation requirements for installing
the PA-4T+ port adapter.
• Tools and Parts Required, page 2-1
• Software and Hardware Requirements, page 2-2
• Safety Guidelines, page 2-3
• FCC Class B Compliance, page 2-5
Tools and Parts Required
You need the following tools and parts to install a port adapter. If you need additional equipment,
contact a service representative for ordering information.
• PA-4T+(=) port adapter and one of the following:
— VIP2-15(=) if you are installing only one PA-4T+; otherwise, we recommend a VIP2-40(=)
or VIP2-50(=)
— Cisco 7200 series router with at least one available port adapter slot
— Cisco uBR7200 series router with at least one available port adapter slot
— Cisco 7100 series router with at least one available port adapter slot
• Serial cables appropriate for the desired port adapter interface types and the desired modes. (See
the “LEDs” section on page 1-15.)
• Number 1 Phillips and a 3/16-inch, flat-blade screwdriver.
• Your own electrostatic discharge (ESD)-prevention equipment or the disposable grounding wrist
strap included with all upgrade kits, field-replaceable units (FRUs), and spares.
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Software and Hardware Requirements
Software and Hardware Requirements
lists the minimum Cisco IOS software release required to use the PA-4T+ port adapter in supported
router platforms.
Table 2-1
PA-4T+ Software Requirements
Router Platform
Recommended Minimum Cisco IOS Release
Cisco 7000 series and Cisco 7500 series
• With VIP2-15(=) or VIP2-40(=)
• With VIP2-50(=)
Cisco IOS Release 11.1(8)CA or a later release of Cisco IOS Release 11.1 CA
Cisco IOS Release 11.1(14)CA or a later release of Cisco IOS Release 11.1 CA
Cisco 7200 series
• Cisco 7204VXR and Cisco 7206VXR
Cisco IOS Release 12.0(3)T or a later release of Cisco IOS Release 12.0 T
Cisco IOS Release 12.0(2)XE2 or a later release of Cisco IOS Release 12.0 XE
1
• Cisco 7204 and Cisco 7206
• Cisco 7202
Cisco IOS Release 11.1(6)CA or a later release of Cisco IOS Release 11.1 CA
Cisco IOS Release 11.1(19)CC1 or a later release of Cisco IOS Release 11.1 CC
Cisco IOS Release 11.3(4)AA or a later release of Cisco IOS Release 11.3 AA
Cisco uBR7200 series router
Cisco 7100 series
Cisco IOS Release 11.3(6)NA or a later release of Cisco IOS Release 11.3 NA
• Cisco 7120 series and Cisco 7140 series Cisco IOS Release 12.0(4)XE or a later release of Cisco IOS Release 12.0 XE
Cisco IOS Release 12.0(5)T or a later release of Cisco IOS Release 12.0 T
1
For PA-4T+ port adapters installed in Cisco 7200 series routers, Cisco IOS Release 11.1(6)CA, or later, is required; however, we recommend Cisco IOS
Release 11.1(8)CA or later.
Note Cisco IOS Release 11.2(7a)P or later supports half-duplex and binary synchronous
communications (Bisync) operation on PA-4T+ port adapters in Cisco 7200 series routers.
Also refer to the Cisco IOS software release notes for the Cisco IOS software version you are
running.
In Cisco 7000 series or Cisco 7500 series routers, the PA-4T+ requires the following VIP2 models:
• VIP2-15(=) (1 MB of SRAM, 8 MB of DRAM)
• VIP2-20(=) (1 MB of SRAM and 16 MB of DRAM)
• VIP2-40(=) (2 MB of SRAM, 32 MB of DRAM)
• VIP2-50(=) (4 to 8 MB of SRAM, 32 to 128 MB of DRAM)
Note The PA-4T+ can be installed in port adapter slot 0 or slot 1 on the VIP2 motherboard, or in
any available port adapter slot in a Cisco 7200 series chassis.
Caution To prevent system problems, the VIP2 requires that Cisco 7000 series routers have the
RSP7000 and RSP7000CI installed. The VIP2 will not operate properly with the Route Processor
(RP), Switch Processor (SP), or Silicon Switch Processor (SSP) installed in a Cisco 7000 series
router.
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Software and Hardware Requirements
Note The minimum recommended VIP2 model is a VIP2-15.
Preparing for Installation 2-3
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Safety Guidelines
Safety Guidelines
This section provides safety guidelines that you should follow when working with any equipment
that connects to electrical power or telephone wiring.
Safety Warnings
Safety warnings appear throughout this publication in procedures that, if performed incorrectly,
might harm you. A warning symbol precedes each warning statement.
Warning This warning symbol means danger. You are in a situation that could cause bodily injury.
Before you work on any equipment, be aware of the hazards involved with electrical circuitry and
be familiar with standard practices for preventing accidents. To see translations of the warnings that
appear in this publication, refer to the Regulatory Compliance and Safety Information document that
accompanied this device.
Waarschuwing Dit waarschuwingssymbool betekent gevaar. U verkeert in een situatie die
lichamelijk letsel kan veroorzaken. Voordat u aan enige apparatuur gaat werken, dient u zich bewust
te zijn van de bij elektrische schakelingen betrokken risico's en dient u op de hoogte te zijn van
standaard maatregelen om ongelukken te voorkomen. Voor vertalingen van de waarschuwingen die
in deze publicatie verschijnen, kunt u het document Regulatory Compliance and Safety Information
(Informatie over naleving van veiligheids- en andere voorschriften) raadplegen dat bij dit toestel is
ingesloten.
Varoitus Tämä varoitusmerkki merkitsee vaaraa. Olet tilanteessa, joka voi johtaa ruumiinvammaan.
Ennen kuin työskentelet minkään laitteiston parissa, ota selvää sähkökytkentöihin liittyvistä
vaaroista ja tavanomaisista onnettomuuksien ehkäisykeinoista. Tässä julkaisussa esiintyvien
varoitusten käännökset löydät laitteen mukana olevasta Regulatory Compliance and Safety
Information -kirjasesta (määräysten noudattaminen ja tietoa turvallisuudesta).
Attention Ce symbole d'avertissement indique un danger. Vous vous trouvez dans une situation
pouvant causer des blessures ou des dommages corporels. Avant de travailler sur un équipement,
soyez conscient des dangers posés par les circuits électriques et familiarisez-vous avec les
procédures couramment utilisées pour éviter les accidents. Pour prendre connaissance des
traductions d’avertissements figurant dans cette publication, consultez le document Regulatory
Compliance and Safety Information (Conformité aux règlements et consignes de sécurité) qui
accompagne cet appareil.
Warnung Dieses Warnsymbol bedeutet Gefahr. Sie befinden sich in einer Situation, die zu einer
Körperverletzung führen könnte. Bevor Sie mit der Arbeit an irgendeinem Gerät beginnen, seien Sie
sich der mit elektrischen Stromkreisen verbundenen Gefahren und der Standardpraktiken zur
Vermeidung von Unfällen bewußt. Übersetzungen der in dieser Veröffentlichung enthaltenen
Warnhinweise finden Sie im Dokument Regulatory Compliance and Safety Information
(Informationen zu behördlichen Vorschriften und Sicherheit), das zusammen mit diesem Gerät
geliefert wurde.
Avvertenza Questo simbolo di avvertenza indica un pericolo. La situazione potrebbe causare
infortuni alle persone. Prima di lavorare su qualsiasi apparecchiatura, occorre conoscere i pericoli
relativi ai circuiti elettrici ed essere al corrente delle pratiche standard per la prevenzione di incidenti.
La traduzione delle avvertenze riportate in questa pubblicazione si trova nel documento Regulatory
Compliance and Safety Information (Conformità alle norme e informazioni sulla sicurezza) che
accompagna questo dispositivo.
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Electrical Equipment Guidelines
Advarsel Dette varselsymbolet betyr fare. Du befinner deg i en situasjon som kan føre til
personskade. Før du utfører arbeid på utstyr, må du vare oppmerksom på de faremomentene som
elektriske kretser innebærer, samt gjøre deg kjent med vanlig praksis når det gjelder å unngå ulykker.
Hvis du vil se oversettelser av de advarslene som finnes i denne publikasjonen, kan du se i
dokumentet Regulatory Compliance and Safety Information (Overholdelse av forskrifter og
sikkerhetsinformasjon) som ble levert med denne enheten.
Aviso Este símbolo de aviso indica perigo. Encontra-se numa situação que lhe poderá causar danos
físicos. Antes de começar a trabalhar com qualquer equipamento, familiarize-se com os perigos
relacionados com circuitos eléctricos, e com quaisquer práticas comuns que possam prevenir
possíveis acidentes. Para ver as traduções dos avisos que constam desta publicação, consulte o
documento Regulatory Compliance and Safety Information (Informação de Segurança e Disposições
Reguladoras) que acompanha este dispositivo.
¡Advertencia! Este símbolo de aviso significa peligro. Existe riesgo para su integridad física.
Antes de manipular cualquier equipo, considerar los riesgos que entraña la corriente eléctrica y
familiarizarse con los procedimientos estándar de prevención de accidentes. Para ver una traducción
de las advertencias que aparecen en esta publicación, consultar el documento titulado Regulatory
Compliance and Safety Information (Información sobre seguridad y conformidad con las
disposiciones reglamentarias) que se acompaña con este dispositivo.
Varning! Denna varningssymbol signalerar fara. Du befinner dig i en situation som kan leda till
personskada. Innan du utför arbete på någon utrustning måste du vara medveten om farorna med
elkretsar och känna till vanligt förfarande för att förebygga skador. Se förklaringar av de varningar
som förkommer i denna publikation i dokumentet Regulatory Compliance and Safety Information
(Efterrättelse av föreskrifter och säkerhetsinformation), vilket medföljer denna anordning.
Electrical Equipment Guidelines
Follow these basic guidelines when working with any electrical equipment:
• Before beginning any procedures requiring access to the chassis interior, locate the emergency
power-off switch for the room in which you are working.
• Disconnect all power and external cables before moving a chassis; Do not work alone when
potentially hazardous conditions exist.
• Never assume that power has been disconnected from a circuit; always check.
• Do not perform any action that creates a potential hazard to people or makes the equipment
unsafe; carefully examine your work area for possible hazards such as moist floors, ungrounded
power extension cables, and missing safety grounds.
Telephone Wiring Guidelines
Use the following guidelines when working with any equipment that is connected to telephone
wiring or to other network cabling:
• Never install telephone wiring during a lightning storm.
• Never install telephone jacks in wet locations unless the jack is specifically designed for wet
locations.
• Never touch uninsulated telephone wires or terminals unless the telephone line has been
disconnected at the network interface.
• Use caution when installing or modifying telephone lines.
Preparing for Installation 2-5
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FCC Class B Compliance
Preventing Electrostatic Discharge Damage
Electrostatic discharge (ESD) damage, which can occur when electronic cards or components are
improperly handled, results in complete or intermittent failures. Port adapters and processor modules
comprise printed circuit boards that are fixed in metal carriers. Electromagnetic interference (EMI)
shielding and connectors are integral components of the carrier. Although the metal carrier helps to
protect the board from ESD, use a preventive antistatic strap during handling.
Following are guidelines for preventing ESD damage:
• Always use an ESD wrist or ankle strap and ensure that it makes good skin contact.
• Connect the equipment end of the strap to an unfinished chassis surface.
• When installing a component, use any available ejector levers or captive installation screws to
properly seat the bus connectors in the backplane or midplane. These devices prevent accidental
removal, provide proper grounding for the system, and help to ensure that bus connectors are
properly seated.
• When removing a component, use any available ejector levers or captive installation screws to
release the bus connectors from the backplane or midplane.
• Handle carriers by available handles or edges only; avoid touching the printed circuit boards or
connectors.
• Place a removed component board-side-up on an antistatic surface or in a static shielding
container. If you plan to return the component to the factory, immediately place it in a static
shielding container.
• Avoid contact between the printed circuit boards and clothing. The wrist strap only protects
components from ESD voltages on the body; ESD voltages on clothing can still cause damage.
• Never attempt to remove the printed circuit board from the metal carrier.
For safety, periodically check the resistance value of the antistatic strap. The measurement should
be between 1 and 10 megohms.
FCC Class B Compliance
The equipment described in this manual generates and may radiate radio-frequency energy. If it is
not installed in accordance with Cisco’s installation instructions, it may cause interference with radio
and television reception. This equipment has been tested and found to comply with the limits for a
Class B digital device in accordance with the specifications in part 15 of the FCC rules. These
specifications are designed to provide reasonable protection against such interference in a residential
installation. However, there is no guarantee that interference will not occur in a particular
installation.
You can determine whether your equipment is causing interference by turning it off. If the
interference stops, it was probably caused by the Cisco equipment or one of its peripheral devices.
If the equipment causes interference to radio or television reception, try to correct the interference
by using one or more of the following measures:
• Turn the television or radio antenna until the interference stops.
• Move the equipment to one side or the other of the television or radio.
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FCC Class B Compliance
• Move the equipment farther away from the television or radio.
• Plug the equipment into an outlet that is on a different circuit from the television or radio. (That
is, make certain the equipment and the television or radio are on circuits controlled by different
circuit breakers or fuses.)
Modifications to this product not authorized by Cisco Systems, Inc. could void the FCC approval and
negate your authority to operate the product.
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FCC Class B Compliance
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C H A P T E R 3
VIP2 and the PA-4T+ Port Adapter
This chapter provides information on the PA-4T+ port adapter and its use in the VIP2 in Cisco 7000
series and Cisco 7500 series routers. This chapter contains the following sections:
• Installation Overview, page 3-1
• Removing a Port Adapter, page 3-3
• Installing a Port Adapter, page 3-4
In the Cisco 7000 series or Cisco 7500 series routers, the PA-4T+ requires the following VIP2
models:
• VIP2-15(=) (1 MB of SRAM, 8 MB of DRAM)
• VIP2-20= (1 MB of DRAM, 16 MB of SRAM)
• VIP2-40(=) (2 MB of SRAM, 32 MB of DRAM)
• VIP2-50(=) (4 to 8 MB of SRAM, 32 to 128 MB of DRAM)
Note The PA-4T+ can be installed in port adapter slot 0 or slot 1 on the VIP2 motherboard, or in
any available port adapter slot in a Cisco 7200 series, Cisco uBR7200 series, or Cisco 7100 series
chassis.
Caution To prevent system problems, the VIP2 requires that Cisco 7000 series routers have the
RSP7000 and RSP7000CI installed. The VIP2 will not operate properly with the Route Processor
(RP), Switch Processor (SP), or Silicon Switch Processor (SSP) installed in a Cisco 7000 series
router.
Note The minimum recommended VIP2 model is a VIP2-15.
Installation Overview
The PA-4T+ used on the VIP2 can be installed in either port adapter slot 0 or port adapter slot 1.
Figure 3-1 shows the PA-4T+ installed in port adapter slot 1, on a VIP2-15 or VIP2-40.
VIP2 and the PA-4T+ Port Adapter 3-1
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Installation Overview
Figure 3-1
VIP2-15 or VIP2-40 with a PA-4T+ in Port Adapter Slot 1
CPU
Boot ROM
Bus connector
U6
DRAM
SIMMs
U2
U4
SRAM
DIMM U5
PA-4E in port
PA-4T+ in port
adapter slot 1
adapter
slot 0
FAST SERIAL, ENHANCED
ETHERNET-10BT
EN
TD
TC
RD
RC
L
B
C
D
TD
TC
RD
RC
L
B
C
D
TD
TC
RD
RC
L
B
C
D
TD
TC
RD
RC
L
B
C
D
Port adapter
handles not
shown
Note Port adapters have a handle attached, but this handle is not shown to allow a full view of detail
on each port adapter’s faceplate.
Figure 3-2 shows two PA-4T+ port adapters installed in port adapter slots 0 and 1, on a VIP2-50.
Figure 3-2
VIP2-50 with Two PA-4T+ Port Adapters in Port Adapter Slots 0 and 1
CPU
Boot ROM
Bus connector
SRAM
daughter
card
SDRAM DIMM
PA-4T+ in port
PA-4T+ in port
adapter
slot 0
adapter
slot 1
FAST SERIAL, ENHANCED
FAST SERIAL, ENHANCED
EN
EN
TD
TC
RD
RC
LB CD
TD
TC
RD
RC
LB CD
TD
TC
RD
RC
LB CD
TD
TC
RD
RC
LB CD
TD
TC
RD
RC
LB CD
TD
TC
RD
RC
LB CD
TD
TC
RD
RC
LB CD
TD
TC
RD
RC
LB CD
Port adapter handles not shown
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Removing a Port Adapter
Removing a Port Adapter
This section provides the standard procedures for removing a port adapter on the VIP2.
Depending on the circumstances, you might need to install a new port adapter on a VIP2
motherboard or replace a failed port adapter in the field. In either case, you need a number 1 Phillips
screwdriver, an antistatic mat onto which you can place the removed interface processor, and an
antistatic container into which you can place a failed port adapter for shipment back to the factory.
Caution To prevent system problems, do not remove port adapters from the VIP2 motherboard, or
attempt to install other port adapters on the VIP2 motherboard, while the system is operating. To
install or replace port adapters, first remove the VIP2 from its interface processor slot.
Note Each port adapter circuit board is mounted to a metal carrier and is sensitive to ESD damage.
Each port adapter has one Phillips-head screw that secures it to its port adapter slot. We strongly
recommend that the following procedures be performed by a Cisco-certified service provider;
however, this is not a requirement.
While the VIP2 supports online insertion and removal (OIR), individual port adapters do not. To
replace port adapters, you must first remove the VIP2 from the chassis, then install or replace port
adapters as required. If a blank port adapter is installed on the VIP2 in which you want to install a
new port adapter, you must first remove the VIP2 from the chassis, then remove the blank port
adapter.
Caution To prevent interface reconfiguration requirements, you should replace a port adapter with
the same type of port adapter you removed, but this is not a requirement.
When only one port adapter is installed on a VIP2, a blank port adapter must fill the empty slot to
allow the VIP2 and router chassis to conform to electromagnetic interference (EMI) emissions
requirements, and so that air flows through the chassis properly. If you plan to install a new port
adapter, you must first remove the blank port adapter.
Use the following standard procedure to remove and replace any type of port adapter on a VIP2:
Step 1
Attach an ESD-preventive wrist strap between you and an unfinished chassis surface.
Note If you want to install a new port adapter on a VIP2 with a single port adapter, you
must first remove the blank port adapter from the port adapter slot in which you want to
install the new port adapter.
Step 2
Step 3
For a new port adapter installation or a port adapter replacement, disconnect any interface
cables from the ports on the front of the port adapter, although, this is not required. You
can remove VIP2s with cables attached; however, we do not recommend it.
Remove the VIP2 from the system. (Follow the steps in the section “Removing a VIP2”
in the configuration note Second-Generation Versatile Interface Processor (VIP2)
Installation and Configuration, which shipped with your VIP2.) Place the removed VIP2
on an antistatic mat.
Step 4
Locate the screw at the rear of the port adapter (or blank port adapter) to be replaced. (See
Figure 3-3.) This screw secures the port adapter (or blank port adapter) to its slot.
VIP2 and the PA-4T+ Port Adapter 3-3
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Installing a Port Adapter
Figure 3-3
Location of Port Adapter Screw—Partial Port Adapter View
Screw
Step 5
Step 6
Remove the screw that secures the port adapter (or blank port adapter).
With the screw removed, grasp the handle on the front of the port adapter (or blank port
adapter) and carefully pull it out of its slot, away from the edge connector at the rear of
the slot. (See Figure 3-4.)
Figure 3-4
Pulling a Port Adapter Out of a Slot—Partial Port Adapter View
Step 7
If you removed a port adapter, place it in an antistatic container for safe storage or
shipment back to the factory. If you removed a blank port adapter, no special handling is
required; however, store the blank port adapter for potential future use.
This completes the procedure for removing a port adapter from a VIP2.
Installing a Port Adapter
Step 1
Remove the new port adapter from its antistatic container and position it at the opening
of the slot. (See Figure 3-5.)
Caution To prevent jamming the carrier between the upper and lower edges of the port adapter slot,
and to assure that the edge connector at the rear of the port adapter mates with the connector at the
rear of the port adapter slot, make certain that the leading edges of the carrier are between the upper
and lower slot edges, as shown in the cutaway in Figure 3-5.
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Installing a Port Adapter
Figure 3-5
Aligning a Port Adapter in a Port Adapter Slot
Carrier
Upper edge
Lower edge
Step 2
Before you insert the new port adapter in its slot, verify that the port adapter carrier is
between the upper and lower slot edges, as shown in Figure 3-5. Do not jam the carrier
between the slot edges.
Caution To ensure a positive ground attachment between the port adapter carrier and the VIP2
motherboard and port adapter slot, and to ensure that the connectors at the rear of the port adapter
and slot mate properly, the carrier must be between the upper and lower slot edges. (See Figure 3-5.)
Step 3
Carefully slide the new port adapter into the port adapter slot until the connector on the
port adapter is completely mated with the connector on the motherboard. (See
Figure 3-6.)
VIP2 and the PA-4T+ Port Adapter 3-5
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Installing a Port Adapter
Figure 3-6
Port Adapter Installed in a Port Adapter Slot—Partial Port Adapter View
Step 4
Step 5
Replace the screw in the rear of the port adapter slot. (See Figure 3-3 for its location.)
Do not overtighten this screw.
Reinstall the VIP2 in the system. (Follow the steps in the section “Installing a VIP2” in
the configuration note Second-Generation Versatile Interface Processor (VIP2)
Installation and Configuration, which shipped with your VIP2.)
Step 6
If disconnected, reconnect the interface cables to the port adapters.
This completes the procedure for installing a port adapter on a VIP2. Proceed to Chapter 7,
“Installing the PA-4T+ Interface Cables,” to connect the necessary cables to your port adapter.
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C H A P T E R 4
Cisco 7200 Series and the
PA-4T+ Port Adapter
This chapter provides information on the PA-4T+ and its use in the Cisco 7200 series routers. This
chapter contains the following sections:
• Installation Overview, page 4-1
• Removing a Port Adapter, page 4-2
• Installing a Port Adapter, page 4-3
Installation Overview
Figure 4-1 shows a PA-4T+ installed in port adapter slot 1 of the Cisco 7206. The PA-4T+ is used in
Cisco 7200 series routers and can be installed in any of the available port adapter slots.
Figure 4-1
Cisco 7206 with a PA-4T+ Installed
TOKEN RING
FAST ETHERNET
ETHERNET 10BT
ETHERNET-10BFL
AST SERIAL, ENHANCED
EN
TX
RX
RX
TX
RX
X
RX
TX
RX
4
3
1
0
PA-4T+
port
adapter
FAST ETHERNET INPUT/OUTPUT CONTROLLER
Cisco 7200
Series
Depending on your circumstances, you might need to install a new port adapter in a Cisco 7200
series router or replace a failed port adapter in the field. In either case, no tools are necessary; all port
adapters available for the Cisco 7200 series connect directly to the router midplane and are locked
into position by a port adapter lever. When removing and replacing a port adapter, you will need an
antistatic mat onto which you can place a removed port adapter and an antistatic container into which
you can place a failed port adapter for shipment back to the factory.
Note Cisco 7200 series routers support online insertion and removal (OIR); therefore, you do not
have to power down Cisco 7200 series routers when removing and replacing a PA-4T+.
Cisco 7200 Series and the PA-4T+ Port Adapter 4-1
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Removing a Port Adapter
When a port adapter slot is not in use, a blank port adapter must fill the empty slot to allow the router
to conform to EMI emissions requirements and to allow proper air flow across the port adapters. If
you plan to install a new port adapter in a slot that is not in use, you must first remove a blank port
adapter.
Removing a Port Adapter
Take the following steps to remove a port adapter from a Cisco 7200 series router:
Step 1
Step 2
Attach an ESD-preventive wrist strap between you and an unfinished chassis surface.
Place the port adapter lever for the desired port adapter slot in the unlocked position. The
port adapter lever remains in the unlocked position. (See Figure 4-2.)
Figure 4-2
Placing the Port Adapter Lever in the Unlocked Position—Cisco 7206
TOKEN RING
FAST ETHERNET
ETHERNET 10BT
FAST SERIAL
FAST ETHERNET INPUT/OUTPUT CONTROLLER
Port adapter
handle
Port adapter
Note: This adapter removal
applies to any port or service
adapter.
lever (unlocked
position)
Step 3
Grasp the handle on the port adapter and pull the port adapter from the midplane, about
halfway out of its slot. If you are removing a blank port adapter, pull the blank port
adapter completely out of the chassis slot.
Note As you disengage the port adapter from the router midplane, OIR administratively
shuts down all active interfaces on the port adapter.
Step 4
Step 5
With the port adapter halfway out of the slot, disconnect all cables from the port adapter.
After disconnecting the cables, pull the port adapter from its chassis slot.
Caution Always handle the port adapter by the carrier edges and handle; never touch the port
adapter’s components or connector pins. (See Figure 4-3.)
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Installing a Port Adapter
Figure 4-3
Handling a Port Adapter
Metal carrier
Printed circuit board
Step 6
Place the port adapter on an antistatic surface with its components facing upward, or in a
static shielding bag. If the port adapter will be returned to the factory, immediately place
it in a static shielding bag.
This completes the procedure for removing a port adapter from a Cisco 7200 series router.
Installing a Port Adapter
Take the following steps to install a new port adapter in a Cisco 7200 series router:
Step 1
Step 2
Attach an ESD-preventive wrist strap between you and an unfinished chassis surface.
Use both hands to grasp the port adapter by its metal carrier edges and position the port
adapter so that its components are downward. (See Figure 4-3.)
Step 3
Align the left and right edge of the port adapter metal carrier between the guides in the
port adapter slot. (See Figure 4-4.)
Figure 4-4
Aligning the Port Adapter Metal Carrier Between the Slot Guides—Cisco 7206
TOKEN RING
Slot
guide
FAST ETHERNET
ETHERNET 10BT
Note: This adapter alignment
applies to any port or service
adapter.
Step 4
With the metal carrier aligned in the slot guides, gently slide the port adapter halfway into
the slot.
Caution Do not slide the port adapter all the way into the slot until you have connected all required
cables. Trying to do so will disrupt normal operation of the router.
Cisco 7200 Series and the PA-4T+ Port Adapter 4-3
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Installing a Port Adapter
Step 5
With the port adapter halfway in the slot, connect all required cables to the port adapter.
Step 6
After connecting all required cables, carefully slide the port adapter all the way into the
slot until the port adapter is seated in the router midplane.
Step 7
After seating the port adapter in the router midplane, move the port adapter lever to the
locked position. Figure 4-5 shows the port adapter lever in the locked position.
Note If the port adapter lever does not move to the locked position, the port adapter is
not completely seated in the midplane. Carefully pull the port adapter halfway out of the
slot, reinsert it, and move the port adapter lever to the locked position.
Figure 4-5
Placing the Port Adapter Lever in the Locked Position—Cisco 7206
TOKEN RING
FAST ETHERNET
ETHERNET 10BT
FAST SERIAL
FAST ETHERNET INPUT/OUTPUT CONTROLLER
Port adapter
handle
Port adapter
lever (locked
position)
Note: This adapter installation
applies to any port or service
adapter.
This completes the procedure for installing a new port adapter in a Cisco 7200 series router. Proceed
to Chapter 7, “Installing the PA-4T+ Interface Cables,” to connect the necessary cables to your port
adapter.
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C H A P T E R 5
Cisco uBR7200 Series and the
PA-4T+ Port Adapter
This chapter provides information on the PA-4T+ port adapter and its use on Cisco uBR7200 series
universal broadband routers. This chapter includes the following sections:
• Installation Overview, page 5-1
• Removing a Port Adapter, page 5-2
• Installing a Port Adapter, page 5-4
Installation Overview
The PA-4T+ can be installed in any of the available port adapter slots in the Cisco uBR7200 series.
Figure 5-1 shows a PA-4T+ installed in port adapter slot 2 of the Cisco uBR7246.
Figure 5-1
PA-4T+ in Port Adapter Slot 2—Cisco uBR7246
PA-4T+ port adapter
Depending on the circumstances, you might need to install a new port adapter or replace a failed port
adapter in the Cisco uBR7200 series. In either case, no tools are necessary; all port adapters available
for the Cisco uBR7200 series connect directly to the router midplane and are locked into position by
a port adapter lever (Cisco uBR7223) or retention clip (Cisco uBR7246). When removing and
replacing a port adapter, you will need an antistatic mat onto which you can place a removed port
adapter and an antistatic container into which you can place a failed port adapter for shipment back
to the factory.
Cisco uBR7200 Series and the PA-4T+ Port Adapter 5-1
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Removing a Port Adapter
Note The Cisco uBR7200 series supports online insertion and removal (OIR); therefore, you do not
have to power down the router when removing and replacing a PA-4T+.
When a port adapter slot is not in use, blank port adapters must fill empty slots to allow the router to
conform to EMI emissions requirements and to allow proper air flow across the port adapters. If you
plan to install a new port adapter in a slot that is not in use, you must first remove the blank port
adapter.
Removing a Port Adapter
Take the following steps to remove a port adapter from a Cisco uBR7200 series:
Step 1
Step 2
Attach an ESD-preventive wrist strap between you and an unfinished chassis surface.
Place the port adapter in the unlocked position.
• For the Cisco uBR7246, place the port adapter retention clip for the desired port
adapter slot in the unlocked position. The port adapter retention clip remains in the
unlocked position. (See Figure 5-2.)
Figure 5-2
Placing the Port Adapter Retention Clip in the Unlocked
Position—Cisco uBR7246
Port adapters
Port adapter
retention clip in
unlocked position
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Removing a Port Adapter
• For the Cisco uBR7223, place the port adapter lever in the unlocked position. (See
Figure 5-3.)
Figure 5-3
Placing the Port Adapter Lever in the Unlocked Position—Cisco uBR7223
Port adapters
Port adapter
lever in unlocked
position
Step 3
Grasp the handle on the port adapter and pull the port adapter from the router midplane,
about halfway out of its slot. If you are removing a blank port adapter, pull the blank port
adapter completely out of the chassis slot.
Note As you disengage the port adapter from the midplane, OIR administratively shuts
down all active interfaces on the port adapter.
Step 4
Step 5
With the port adapter halfway out of the slot, disconnect all cables from the port adapter.
After disconnecting the cables, pull the port adapter from its chassis slot.
Caution Always handle the port adapter by the carrier edges and handle; never touch the port
adapter’s components or connector pins. (See Figure 5-4.)
Figure 5-4
Handling a Port Adapter
Metal carrier
Printed circuit board
Cisco uBR7200 Series and the PA-4T+ Port Adapter 5-3
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Installing a Port Adapter
Step 6
Place the port adapter on an antistatic surface with its components facing upward, or in a
static shielding bag. If the port adapter will be returned to the factory, immediately place
it in a static shielding bag.
This completes the procedure for removing a port adapter from a Cisco uBR7200 series router.
Installing a Port Adapter
Take the following steps to install a single-width port adapter in a Cisco uBR7200 series router:
Step 1
Step 2
Attach an ESD-preventive wrist strap between you and an unfinished chassis surface.
Use both hands to grasp the port adapter by its metal carrier edges and position the port
adapter so that its components are downward. (See Figure 5-4.)
Step 3
Align the left and right edge of the port adapter metal carrier between the guides in the
port adapter slot. (See Figure 5-5.)
Figure 5-5
Aligning the Port Adapter Metal Carrier Between the Slot Guides
Metal carrier
Inside
slot guide
PC board
Step 4
With the metal carrier aligned in the slot guides, gently slide the port adapter halfway into
the slot.
Caution Do not slide the port adapter all the way into the slot until you have connected all required
cables. Trying to do so will disrupt normal operation of the router.
Step 5
Step 6
With the port adapter halfway in the slot, connect all required cables to the port adapter.
After connecting the cables, carefully slide the port adapter all the way into the slot until
the port adapter is seated in the router midplane.
Step 7
Place the port adapter in the locked position.
• For the Cisco uBR7246, slide the port adapter retention clip up to the locked position.
(See Figure 5-6.)
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Installing a Port Adapter
Note If the retention clip does not slide up to the locked position, the port adapter is not
completely seated in the midplane. Carefully pull the port adapter halfway out of the slot,
reinsert it, and slide the port adapter lever up to the locked position.
Figure 5-6
Placing the Port Adapter Lever in the Locked Position
Port adapters
Port adapter
retention clip in
locked position
• For the Cisco uBR7223, place the port adapter lever in the locked position. (See
Figure 5-7.)
Figure 5-7
Placing the Port Adapter Lever in the Locked Position—Cisco uBR7223
Port adapters
Port adapter
lever in locked
position
Note If the port adapter lever does not move to the locked position, the port adapter is
not completely seated in the midplane. Carefully pull the port adapter halfway out of the
slot, reinsert it, and move the port adapter lever to the locked position.
Cisco uBR7200 Series and the PA-4T+ Port Adapter 5-5
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Installing a Port Adapter
This completes the procedure for installing a port adapter in a Cisco uBR7200 series router. Proceed
to Chapter 7, “Installing the PA-4T+ Interface Cables,” to connect the necessary cables to your port
adapter.
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C H A P T E R 6
Cisco 7100 Series and the
PA-4T+ Port Adapter
This chapter provides information on the PA-4T+ port adapter and its use in the Cisco 7100 series
routers. This chapter contains the following sections:
• Installation Overview, page 6-1
• Removing a Port Adapter, page 6-2
• Installing a Port Adapter, page 6-3
Installation Overview
The PA-4T+ can be installed in port adapter slot 3 in the Cisco 7120 series, and in port adapter slot
4 in the Cisco 7140 series. Figure 6-1 shows port adapter slot 3 of a Cisco 7120 series router.
Figure 6-2 shows port adapter slot 4 of a Cisco 7140 series router.
Figure 6-1
Cisco 7120 Series Router—Port Adapter Slot 3 Location
Locked
Unlocked
ESD plug
Slot 3
SLOT
0
SLOT
1
PWR
ACT ACT
LNK LNK
0
2
5
SYS
RDY
0
1
FE
0
/
0
FE
0
/
1
CONS
AUX
E3
TX
RX
I
RX
EN
CEL CAR ALM
7120
-
AE3
Cisco 7100 Series and the PA-4T+ Port Adapter 6-1
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Removing a Port Adapter
Figure 6-2
Cisco 7140 Series Router—Port Adapter Slot 4 Location
Locked
Unlocked
ESD plug
Slot 4
SLOT
0
SLOT
1
PWR
ACT ACT
LNK LNK
0
2
5
SYS
RDY
0
1
FE
0
/
0
FE
RX
0
/
1
CONS
AUX
155
-
MM
155
-
MM
TX
RX
RX
TX
I
RX
EN
EN
CEL CAR ALM
CEL CAR ALM
7140
-
2MM3
Depending on your circumstances, you might need to install a new port adapter in a Cisco 7100
series router or replace a failed port adapter in the field. All port adapters available for the Cisco 7100
series connect directly to the router and are locked into position by a locking tab with two screws
(seeFigure 6-1 orFigure 6-2.) You need a number 2 Phillips screwdriver to loosen the screws.
Note Cisco 7100 series routers support online insertion and removal (OIR); therefore, you do not
have to power down the router when removing and replacing a port adapter.
When a port adapter slot is not in use, a blank port adapter must fill the empty slot to allow the router
to conform to EMI emissions requirements and to allow proper airflow across the port adapters. If
you plan to install a new port adapter in a slot that is not in use, you must first remove a blank port
adapter.
Removing a Port Adapter
Take the following steps to remove a port adapter from a Cisco 7100 series router:
Step 1
Step 2
Step 3
Attach an ESD-preventive wrist strap between you and the chassis. (See Figure 6-1 or
Figure 6-2 for the location of the ESD plug.)
Use a number 2 Phillips screwdriver to loosen the screws on the locking tab; then slide
the tab down to the unlocked position. (See Figure 6-1 or Figure 6-2.)
Grasp the handle on the port adapter and pull the port adapter from the router, about
halfway out of its slot. If you are removing a blank port adapter, pull the blank port
adapter completely out of the chassis slot.
Note As you disengage the port adapter from the router, OIR administratively shuts
down all active interfaces on the port adapter.
Step 4
Step 5
With the port adapter halfway out of the slot, disconnect all cables from the port adapter.
After disconnecting the cables, pull the port adapter from its chassis slot.
Caution Always handle the port adapter by the carrier edges and handle; never touch the port adapter’s
components or connector pins. (See Figure 6-3.)
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Installing a Port Adapter
Figure 6-3
Handling a Port Adapter
Metal carrier
Printed circuit board
Step 6
Step 7
Place the port adapter on an antistatic surface with its components facing upward, or in a
static shielding bag. If the port adapter will be returned to the factory, immediately place
it in a static shielding bag.
Install a blank port adapter or replacement port adapter to maintain proper flow of cooling
air across the internal components and move the port adapter lever to the locked position
and secure. For procedures on how to install a port adapter, see the next section,
“Installing a Port Adapter.”
Note The blank port adapter is available from Cisco Systems as a spare. The blank port
adapter product number is MAS-7100-PABLANK.
This completes the procedure for removing a port adapter from a Cisco 7100 series router.
Installing a Port Adapter
Follow these steps to install a new port adapter in a Cisco 7100 series router:
Step 1
Attach an ESD-preventive wrist strap between you and the chassis. (See Figure 6-1 or
Figure 6-2 for the location of the ESD plug.)
Step 2
Ensure that the locking tab is down in the unlocked position. If it is locked, use a number 2
Phillips screwdriver to loosen the screws; then slide the tab down to the unlocked
position. (See Figure 6-1 or Figure 6-2.)
Step 3
Step 4
Step 5
Step 6
Remove the new port adapter from its antistatic container and position it at the opening
of the slot.
Use both hands to grasp the port adapter by its metal carrier edges, and position the port
adapter so that its components face downward. (See Figure 6-3.)
Align the left and right edge of the port adapter metal carrier between the guides in the
port adapter slot. (See Figure 6-4.)
With the metal carrier aligned in the slot guides, gently slide the port adapter halfway into
the slot.
Caution Do not slide the port adapter all the way into the slot until you have connected all required cables.
Trying to do so disrupts normal operation of the router.
Cisco 7100 Series and the PA-4T+ Port Adapter 6-3
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Installing a Port Adapter
Figure 6-4
Aligning the Single-Width Port Adapter Between the Slot Guides
Guides
I
RCVR
XMTR
RCLK
AIS
FERF
OOF
FE
EN
RL
0
/
LL
Step 7
Step 8
With the port adapter halfway in the slot, connect all required cables to the port adapter.
After connecting all required cables, carefully slide the port adapter all the way into the
slot until the port adapter is seated in the router.
Step 9
After seating the port adapter in the router, slide the locking tab to the locked position and
tighten the screws. (Figure 6-1 and Figure 6-2 show the locking tab in the locked
position.)
This completes the procedure for installing a new port adapter in a Cisco 7100 series router. Proceed
to Chapter 8, “Configuring the PA-4T+ Interfaces,” to connect the necessary cables to your port
adapter.
6-4
PA-4T+ Synchronous Serial Port Adapter Installation and Configuration
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C H A P T E R 7
Installing the PA-4T+ Interface Cables
To continue your PA-4T+ port adapter installation, you must install the port adapter cables and
configure the PA-4T+ interfaces. The instructions that follow apply to all supported platforms. Minor
differences between the platforms are noted. This chapter contains the following sections:
• Attaching PA-4T+ Port Adapter Interface Cables, page 7-1
• Replacing PA-4T+ Port Adapter Cables, page 7-2
Attaching PA-4T+ Port Adapter Interface Cables
On a single PA-4T+, you can use up to four synchronous serial connections. Use the following
procedure to connect a serial cable to the PA-4T+:
Step 1
Attach the appropriate serial cable directly to the receptacle on the PA-4T+ and tighten
the strain-relief screws. (See Figure 7-1.)
Note Port adapters have a handle attached, but this handle is not shown to allow a
detailed view of each port adapter’s faceplate.
Figure 7-1
Connecting PA-4T+ Serial Cables—Horizontal Orientation (Shown Without
Handles)
FAST SERIAL, ENHANCED
Strain-relief screws
To CSU, DSU, or external
synchronous serial equipment
Installing the PA-4T+ Interface Cables 7-1
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Replacing PA-4T+ Port Adapter Cables
Caution Serial interface cables must be attached correctly or damage to the cable plug will result.
Attempting to force a cable plug on the 60-pin receptacle can damage the plug. (See Figure 7-2.)
Figure 7-2
Connecting Serial Port Adapter Cables
Correct
PA-4T+ in port adapter
interface cable
Router port
Incorrect, cable upside down
PA-4T+ in port adapter
interface cable
Router port
Step 2
Attach the network end of the serial cable to your DSU, CSU, DTE, or other external
synchronous serial equipment and tighten the strain-relief screws.
This completes the procedure for attaching serial interface cables to the PA-4T+.
Replacing PA-4T+ Port Adapter Cables
The port adapter cable connected to each port determines the electrical interface type and mode of
the port. The default mode of the ports is DCE, which allows you to perform a loopback test on any
port without having to attach a port adapter cable. Although DCE is the default, there is no default
clock rate set on the interfaces. When there is no cable attached to a port, the software actually
identifies the port as Universal (cable unattached) rather than either a DTE or DCE interface.
Following is an example of the show controllers command for Cisco 7100 series, Cisco 7200 series
or Cisco uBR7200 series routers that shows an interface port (1/0) that has an EIA/TIA-232 DCE
cable attached:
Router# show controllers serial 1/0
M4T: show controller:
PAS unit 8, subunit 0, f/w version 1-25, rev ID 0x2800001, version 2
idb = 0x60B83B40, ds = 0x60B858B8, ssb=0x60B85FFC
Clock mux=0x0, ucmd_ctrl=0x1C, port_status=0x3E
Serial config=0x0, line config=0x200
maxdgram=1524, bufpool=48Kb, 96 particles
DCD=up DSR=up DTR=up RTS=up CTS=up
line state: up
cable type : V.24 (RS-232) DCE cable, received clockrate 9600
[display text omitted]
Note In the above output from the show controllers command, the PA-4T+ is displayed as M4T.
7-2
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Replacing PA-4T+ Port Adapter Cables
Following is an example of the show controllers cbus command for a VIP2 that shows an interface
port (3/1/0) that has an EIA/TIA-232 DTE cable attached:
Router# show controllers cbus 3/1/0
slot3: VIP2, hw 2.3, sw 21.40, ccb 5800FF30, cmdq 48000088, vps 8192
software loaded from system
IOS (tm) VIP Software (SVIP-DW-M), Version 11.1(8)CA, RELEASED SOFTWARE
ROM Monitor version 17.0
Mx Serial(4), HW Revision 0x2, FW Revision 1.25
Serial3/1/0, applique is RS-232 DTE
gfreeq 48000140, lfreeq 480001D0 (1536 bytes), throttled 0
rxlo 4, rxhi 81, rxcurr 1, maxrxcurr 2
txq 48001A00, txacc 48001A02 (value 6), txlimit 6
To change the mode of a port online, use software commands to shut down the interface, replace the
compact serial cable, restart the interface and, if necessary, reconfigure the port for the new interface.
At system startup or restart, the system polls the interfaces and determines the electrical interface
type of each port (according to the type of compact serial cable attached). However, the system does
not necessarily repoll an interface when you change the adapter cable online. To ensure that the
system recognizes the new interface type, shut down and reenable the interface after changing the
cable.
If you are replacing a cable with a cable that has the same mode, these steps are not necessary
(simply replace the cable without interrupting operation).
Step 1
Enter configuration mode and at the privileged level of the EXEC (also called enable
mode), specify the port address, shut down the interface, and write the configuration to
nonvolatile random-access memory (NVRAM). (See the “Using the EXEC Command
Interpreter” section on page 8-1 for an explanation of the privileged level of the EXEC.)
Add additional configuration commands, as needed, before you exit from configuration
mode (before you press Ctrl-Z or enter end).
For a Cisco 7200 series, Cisco uBR7200 series, or Cisco 7100 series router, use the
following commands:
Router> enable
Password:
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)# interface serial 1/0
Router(config-if)# shutdown
Ctrl-Z
Router#
For a VIP2, use the following commands:
Router> enable
Password:
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)# interface serial 3/1/0
Router(config-if)# shutdown
Ctrl-Z
Router#
Step 2
Step 3
Locate and remove the adapter cable to be replaced.
Connect the new cable between the PA-4T+ and the network connection. Tighten the
thumbscrews at both ends of the cable to secure it in the ports.
Step 4
Enter configuration mode again, bring the port back up, and save the running
configuration to NVRAM.
Installing the PA-4T+ Interface Cables 7-3
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Replacing PA-4T+ Port Adapter Cables
For a Cisco 7100 series, Cisco 7200 series, or Cisco uBR7200 series router, use the
following commands:
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)# interface serial 1/0
Router(config-if)# no shutdown
Ctrl-Z
Router#
Router# copy running-config startup-config
For a VIP2, use the following commands:
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)# interface serial 3/1/0
Router(config-if)# no shutdown
Ctrl-Z
Router#
Router# copy running-config startup-config
These steps will prompt the system to poll the interface and recognize new interface immediately.
When you configure a port for a DCE interface for the first time, or when you set up a loopback test,
you must set the clock rate for the port. When you connect a DCE cable to a port, the interface will
remain down, the clock LEDs will remain off, and the interface will not function until you set a clock
rate (regardless of the DCE mode default).
If you are changing the mode of the interface from DCE to DTE, you do not need to change the clock
rate for the port. After you replace the DCE cable with a DTE cable and the system recognizes the
interface as a DTE, it will use the external clock signal from the remote DCE device and ignore the
internal clock signal that the DCE interface normally uses. Therefore, after you configure the clock
rate on a port for either a DCE interface or loopback, you can leave the clock rate configured and
still use that port as a DTE interface.
This completes the procedure for replacing a port adapter cable on the PA-4T+. Proceed to
Chapter 8, “Configuring the PA-4T+ Interfaces,” to configure the interfaces on your PA-4T+.
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C H A P T E R 8
Configuring the PA-4T+ Interfaces
To continue your PA-4T+ port adapter installation, you must install the port adapter cables and
configure the PA-4T+ interfaces. The instructions that follow apply to all supported platforms. Minor
differences between the platforms are noted. This chapter contains the following sections:
• Using the EXEC Command Interpreter, page 8-1
• Identifying Port Adapter Slot and PA-4T+ Interface Port Numbers, page 8-2
• Shutting Down an Interface, page 8-5
• Performing a Basic Configuration, page 8-8
• Configuring Timing (Clock) Signals, page 8-9
• Configuring Half-Duplex and Binary Synchronous Communications, page 8-12
• Checking the Configuration, page 8-14
If you installed a new PA-4T+ or if you want to change the configuration of an existing interface,
you must enter configuration mode using the configure command. If you replaced a PA-4T+ that
was previously configured, the system will recognize the new PA-4T+ interfaces and bring each of
them up in their existing configuration.
After you verify that the new PA-4T+ is installed correctly (the enabled LED goes on), use the
privileged-level configure command to configure the new interfaces. Be prepared with the
information you will need, such as the following:
• Protocols you plan to route on each new interface
• IP addresses if you will configure the interfaces for IP routing
• Whether or not the new interfaces will use bridging
• Timing source for each new interface and clock speeds for external timing
For a summary of the configuration options available and instructions for configuring interfaces on
the PA-4T+, refer to the appropriate configuration publications listed in the “Related
Documentation” section on page vi.
Using the EXEC Command Interpreter
You modify the configuration of your router through the software command interpreter called the
EXEC (also called enable mode). You must enter the privileged level of the EXEC command
interpreter with the enable command before you can use the configure command to configure a new
interface or to change the existing configuration of an interface. The system prompts you for a
password if one is set.
Configuring the PA-4T+ Interfaces 8-1
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Identifying Port Adapter Slot and PA-4T+ Interface Port Numbers
The system prompt for the privileged level ends with a pound sign (#) instead of an angle bracket
(>). At the console terminal, use the following procedure to enter the privileged level:
Step 1
At the user-level EXEC prompt, enter the enable command. The EXEC prompts you for
a privileged-level password as follows:
Router> enable
Password:
Step 2
Enter the password (the password is case-sensitive). For security purposes, the password
is not displayed.
When you enter the correct password, the system displays the privileged-level system
prompt (#):
Router#
Identifying Port Adapter Slot and PA-4T+ Interface Port Numbers
This section describes how to identify port adapter slot and PA-4T+ interface port numbers for the
Cisco 7100 series, Cisco 7200 series, the Cisco uBR7200 series routers, and the VIP2.
Cisco 7200 Series and Cisco uBR7200 Series Ports
Physical port addresses specify the actual physical location of each interface port on a Cisco 7200
series router (see Figure 8-1) or a Cisco uBR7200 series router (see Figure 8-2). This address is
composed of a two-part number in the format port adapter slot number/interface port number, as
follows:
• The first number identifies the chassis slot in which the PA-4T+ is installed.
• The second number identifies the interface ports on each PA-4T+, which are always numbered in
sequence as interface 0 through 3.
Interface ports on the PA-4T+ maintain the same address regardless of whether other port adapters
are installed or removed. However, when you move a port adapter to a different slot, the first number
in the address changes to reflect the new slot number.
In Cisco 7200 series routers, port adapter slots are numbered from the lower left to the upper right,
beginning with port adapter slot 1 and continuing through port adapter slot 2 for the Cisco 7202,
slot 4 for the Cisco 7204 and Cisco 7204VXR, and slot 6 for the Cisco 7206 and Cisco 7206VXR.
Port adapter slot 0 is reserved for the optional Fast Ethernet port on the I/O controller—if present.
Figure 8-1 shows the interface ports of a PA-4T+ in slot 1 of a Cisco uBR7246 router.
For example, the addresses of the interface ports on the PA-4T+ in chassis slot 1 are 1/0 through 1/3
(chassis slot 1 and interface ports 0 through 3). If the PA-4T+ was in port adapter slot 4, these same
interface ports would be numbered 4/0 through 4/3.
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Cisco 7200 Series and Cisco uBR7200 Series Ports
Figure 8-1
PA-4T+ Interface Port Address Example—Cisco uBR7246
TOERING
FAST ETHERNET
ETHERNET 10BT
ETHERNET-10BFL
FAST SERIAL, ENHANCED
EN
TX
RX
RX
TX
RX
RX
TX
RX
4
1
0
FAST ETHERNET INPUT/OUTPUT CONTROLLER
PA-4T+ port adapter
(interface port addresses 1/0, 1/1, 1/2,
1/3 from left to right)
Figure 8-2 shows the interface ports of a PA-4T+ in slot 2 of the Cisco uBR7200 series. The port
adapter slot are numbered slot 1 and slot 2 (slot 0 is always reserved for the Fast Ethernet port on the
I/O controller—if present). The individual interface port numbers always begin with 0. The number
of additional ports depends on the number of ports on a port adapter. Port adapters can occupy any
port adapter slot; there are no restrictions.
For example, the addresses of the interface ports on the PA-4T+ in chassis slot 2 are 2/0 through 2/3
(chassis slot 2 and interface ports 0 through 3). If the PA-4T+ was in port adapter slot 1, these same
interface ports would be numbered 1/0 through 1/3.
Figure 8-2
PA-4T+ Interface Port Address Example—Cisco uBR7200 Series
PA-4T+ port adapter
(interface port addresses 2/0,
2/1, 2/2, 2/3 from left to right)
You can identify interface ports by physically checking the slot/port adapter/interface port location
on the back of the router or by using software commands to display information about a specific
interface or all interfaces in the router.
Configuring the PA-4T+ Interfaces 8-3
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Identifying Port Adapter Slot and PA-4T+ Interface Port Numbers
VIP2 Ports
In the router, physical port addresses specify the actual physical location of each interface port on
the router interface processor end. (See Figure 8-3.) This address is composed of a three-part number
in the format interface processor slot number/port adapter number/interface port number.
Note Although the processor slots in the 7-slot Cisco 7000 and Cisco 7507 and 13-slot Cisco 7513
are vertically oriented and those in the 5-slot Cisco 7010 and Cisco 7505 are horizontally oriented,
all models use the same method for slot and port numbering.
• The first number identifies the interface processor slot in which the VIP2 is installed.
• The second number identifies the port adapter slot on the VIP2, and is either 0 or 1.
• The third number identifies the interface ports on each PA-4T+, which are always numbered in
sequence as interface 0 through 3.
Interface ports on a PA-4T+ that is installed in a VIP2 maintain the same address regardless of
whether other interface processors are installed or removed. However, when you move a VIP2 to a
different slot, the first number in the address changes to reflect the new slot number.
Figure 8-3 shows some of the port adapter slot and interface ports of a sample Cisco 7505 router.
The interface port addresses for the installed PA-4T+ are 3/1/0 through 3/1/3 (interface processor
slot 3, port adapter slot 1, and interface ports 0 through 3). If the PA-4T+ was in port adapter slot 0,
these same interface ports would be numbered 3/0/0 through 3/0/3.
Note If you remove the VIP2 (shown in Figure 8-3) from interface processor slot 3 and install it in
interface processor slot 2, the addresses of those same PA-4T+ ports become 2/1/0 through 2/1/3.
Figure 8-3
PA-4T+ Interface Port Address Example—Cisco 7505
PA-4T+ port adapter
(interface port addresses 3/1/0,
3/1/1, 3/1/2, 3/1/3 from left to right)
ROUTE SWITCH PROCESSOR
EJECT
CPU HALT RESET
SLOT
1
SLOT
0
CONSOLE
NORMAL
FAST SERIAL, ENHANCED
ETHERNET 10BT
3
LINK
3
2
0
1
Slot 3
Slot 2
Slot 1
1
0
2
Interface
processor
slots
Slot 0
You can identify interface ports by physically checking the slot/port adapter/interface port location
on the back of the router or by using show commands to display information about a specific
interface or all interfaces in the router.
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Cisco 7100 Series Ports
Cisco 7100 Series Ports
In Cisco 7100 series routers, the slot number is the location in the chassis where the interface resides and the port
number is the physical port. Interfaces in the Cisco IOS software are identified by a type, slot number, and port
number. For example, serial 3/1 indicates port 1 on the serial port adapter in slot 3.
Slots in Cisco 7120 series routers are numbered as shown in Figure 8-4. The fixed LAN interface is slot 0, the
fixed WAN interface is slot 1, and the modular port adapter interface is slot 3. On the Cisco 7120 series, slots 2
and 4 are not used. Slot 5 is the service adapter.
Figure 8-4
Port Adapter Slot Numbering—Cisco 7120 Series
Slot 5
Slot 3
SLOT
0
SLOT
1
PWR
ACT ACT
LNK LNK
0
2
5
SYS
RDY
0
1
FE
0
/
0
FE
0
/
1
CONS
AUX
E3
TX
RX
I
RX
EN
CEL CAR ALM
7120
-
AE3
Slot 1
Slot 0
Slots in the Cisco 7140 series are numbered as shown Figure 8-5. The fixed LAN interface is slot 0, the fixed WAN
interfaces are slots 1 and 2, and the modular port adapter interface is slot 4. Slot 3 is not used. Slot 5 is the service
adapter.
Figure 8-5
Port Adapter Slot Numbering—Cisco 7140 Series
Slot 5
Slot 4
SLOT
0
SLOT
1
BOOT
PWR
ACT ACT
LNK LNK
SM-EC-DS
RESET
ERROR
EN
0
2
5
SYS
RDY
0
1
FE
0
/
0
FE
RX
0
/
1
CONS
AUX
155
-
MM
155
-
MM
TX
RX
RX
TX
I
RX
EN
EN
CEL CAR ALM
CEL CAR ALM
7140
-
2MM3
Slot 1
Slot 0 Slot 2
Shutting Down an Interface
Before you replace an interface cable, replace port adapters, or remove an interface that you will not
replace, use the shutdown command to shut down (disable) the interfaces. Doing so prevents
anomalies from occurring when you reinstall the new or reconfigured port adapter. When you shut
down an interface, it is designated administratively down in the show command displays.
Follow these steps to shut down an interface:
Step 1
Enter the privileged level of the EXEC command interpreter. (See the “Using the EXEC
Command Interpreter” section on page 8-1 for instructions.)
Configuring the PA-4T+ Interfaces 8-5
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Shutting Down an Interface
Step 2
At the privileged-level prompt, enter configuration mode and specify that the console
terminal will be the source of the configuration subcommands as follows:
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#
Step 3
For a Cisco 7200 series, Cisco uBR7200 series, or Cisco 7100 series router, specify the
slot/port address of the first interface that you want shut down by entering the
subcommand interface, followed by the type (serial) and slot/port (port adapter
slot number/0). The example that follows is for a port adapter in slot 1:
Router(config)# interfaceserial 1/0
For a VIP2, specify the slot/port address of the first interface that you want shut down by
entering the subcommand interface, followed by the type (serial) and slot/port (interface
processor slot number/0). The example that follows is for a VIP2 in interface processor
slot 3:
Router(config)# interface serial 3/0
Step 4
Step 5
Enter the shutdown command as follows:
Router(config-if)# shutdown
To shut down additional interfaces, enter the slot/port address of each additional interface
followed by the shutdown command. When you have entered all the interfaces to be shut
down, press Ctrl-Z (hold down the Control key while you press Z) or enter end to exit
configuration mode and return to the EXEC command interpreter prompt.
For a Cisco 7100 series, Cisco 7200 series or Cisco uBR7200 series router, use the
following example:
Router(config-if)# interface serial 1/0
Router(config-if)# shutdown
Router(config-if)# interface serial 1/1
Router(config-if)# shutdown
Ctrl-Z
Router#
For a VIP2, use the following example:
Router(config-if)# interface serial 3/0
Router(config-if)# shutdown
Router(config-if)# interface serial 3/0
Router(config-if)# shutdown
Ctrl-Z
Router#
Step 6
Step 7
Write the new configuration to memory as follows:
Router# copy running-config startup-config
[OK]
Router#
The system displays an OK message when the configuration has been stored.
Verify that new interfaces are now in the correct state (shutdown). To do so, use the show
interfaces serial slot/port command to display the specific interface, or use the show
interfaces command, without variables, to display the status of all interfaces in the
system.
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Shutting Down an Interface
For a Cisco 7200 series, Cisco uBR7200 series, or Cisco 7100 series router, use the
following example:
Router# show interfaces serial 1/0
Serial 1/0 is administratively down, line protocol is down
Hardware is M4T
[display text omitted]
For a VIP2, use the following example:
Router# show interfaces serial 3/1/0
Serial 1/1/0 is administratively down, line protocol is down
Hardware is cyBus Serial
[display text omitted]
Step 8
Reenable the interfaces. To do so, repeat the previous steps, but use the no shutdown
command in Step 4; then write the new configuration to memory.
For a Cisco 7200 series, Cisco uBR7200 series, or a Cisco 7100 series router, use the
following example:
Router(config)# interface serial 1/0
Router(config-if)# no shutdown
Ctrl-Z
Router#
Router# copy running-config startup-config
[OK]
Router# show interfaces serial 1/0
Serial 1/0 is up, line protocol is up
Hardware is M4T
[display text omitted]
Note In the above output from the show interfaces command, the PA-4T+ is displayed
as M4T.
For a VIP2, use the following example:
Router(config)# interface serial 3/1/0
Router(config-if)# no shutdown
Ctrl-Z
Router#
Router# copy running-config startup-config
[OK]
Router# show interfaces serial 3/1/0
Serial 3/1/0 is up, line protocol is up
Hardware is cxBus VIP2
[display text omitted]
For complete descriptions of software configuration commands, refer to the publications listed in the
“Related Documentation” section on page vi. Proceed to the following section to configure the new
interfaces.
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Performing a Basic Configuration
Performing a Basic Configuration
Following are instructions for a basic interface configuration: enabling an interface, specifying IP
routing, and setting up external timing on a DCE interface. You might also need to enter other
configuration subcommands, depending on the requirements for your system configuration and the
protocols you plan to route on the interface. For complete descriptions of configuration
subcommands and the configuration options available for serial interfaces, refer to the appropriate
software documentation.
In the following procedure, press the Return key after each step unless otherwise noted. At any time
you can exit the privileged level and return to the user level by entering disable at the prompt as
follows:
Router# disable
Router>
Step 1
Step 2
At the privileged-level prompt, enter configuration mode and specify that the console
terminal will be the source of the configuration subcommands as follows:
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#
For a Cisco 7200 series, Cisco uBR7200 series or a Cisco 7100 series router, specify the
first interface to configure by entering the subcommand interface, followed by the type
(serial) and slot/interface (port adapter slot number and interface number). The example
that follows is for the first interface of the port adapter on a Cisco 7200 series, Cisco 7100
series, or Cisco uBR7200 series router in slot 1:
Router(config)# interface serial 1/0
For a VIP2, specify the first interface to configure by entering the subcommand interface,
followed by the type (serial) and slot/port (interface processor slot number/0). The
example that follows is for the first interface of the first port adapter on a VIP2 in interface
processor slot 3:
Router(config)# interface serial 3/0
Step 3
If IP routing is enabled on the system, you can assign an IP address and subnet mask to
the interface with the ip address configuration subcommand, as in the following
example:
Router(config-if)# ip address 10.10.10.10 255.255.255.255
Step 4
Step 5
Step 6
Add any additional configuration subcommands required to enable routing protocols and
set the interface characteristics.
If you are configuring a DTE interface, proceed to Step 7. If you are configuring a DCE
interface, you need to configure the external clock signal, as described in the next step.
Set the clock rate with the clock rate command. (See the next section, “Configuring
Timing (Clock) Signals.”)
Router(config-if)# clockrate 7200
Step 7
Step 8
Change the shutdown state to up and enable the interface as follows:
Router(config-if)# no shutdown
Configure additional interfaces as required.
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Configuring Timing (Clock) Signals
Step 9
When you have included all of the configuration subcommands to complete the
configuration, press Ctrl-Z (hold down the Control key while you press Z) or enter end
to exit configuration mode and return to the EXEC command interpreter prompt.
Step 10 Write the new configuration to nonvolatile memory as follows:
Router# copy running-config startup-config
[OK]
Router#
This completes the procedure for creating a basic configuration. Proceed to the following section
“Configuring Timing (Clock) Signals.”
The following sections describe the commands for configuring an external clock signal for a DCE
interface and for configuring a port for NRZI encoding or 32-bit CRC. Configuration commands are
executed from the privileged level of the EXEC command interpreter, which usually requires
password access. Contact your system administrator, if necessary, to obtain access. (See the “Using
the EXEC Command Interpreter” section on page 8-1 for an explanation of the privileged level of
the EXEC.)
Configuring Timing (Clock) Signals
All PA-4T+ interfaces support both DTE and DCE mode, depending on the mode of the interface
cable attached to the port. To use a port as a DTE interface, you need only connect a DTE cable to
the port. When the system detects the DTE mode cable, it automatically uses the external timing
signal. To use a port in DCE mode, you must connect a DCE interface cable and set the clock speed
with the clock rate configuration command. You must also set the clock rate to perform a loopback
test. This section describes how to set the clock rate on a DCE port and, if necessary, how to invert
the clock to correct a phase shift between the data and clock signals.
Setting the Clock Rate
The default operation on a PA-4T+ DCE interface is for the DCE device to generate its own clock
signal (TxC) and send it to the remote DTE. The remote DTE device returns the clock signal to the
DCE (PA-4T+). The clock rate command specifies the rate as a bits-per-second value. In the
following example for a Cisco 7100 series, Cisco 7200 series or Cisco uBR7200 series router, the
clock rate for the serial interface on a PA-4T+ in slot 1 (1/0) is specified as 72 kbps:
Router(config)# interface serial 1/0
Router(config-if)# clock rate 72000
In the following example, the clock rate for the serial interface on a PA-4T+ on a VIP2 in interface
processor slot 3 (3/1/0) is specified as 72 kbps:
Router(config)# interface serial 3/1/0
Router(config-if)# clock rate 72000
Use the no clock rate command to remove the clock rate.
Following are the standard clock rates:
1200, 2400, 4800, 9600, 19200 38400, 56000, 64000,
72000, 125000 148000, 250000, 500000, 800000, 1000000,
1300000, 2000000, 4000000, 8000000
Configuring the PA-4T+ Interfaces 8-9
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Configuring Timing (Clock) Signals
Note Cisco IOS Release 11.2(7a)P or later, or 11.1(10)CA or later loaded on your Cisco 7200
series, Cisco 7000 series, or Cisco 7500 series router with a VIP2-40(=) support nonstandard clock
rates (any value from 1200 to 8000000) on PA-4T+ interfaces.
Cisco IOS Release 12.0(3)T or later, or 12.0(1)XE or later support nonstandard clock rates on
PA-4T+ interfaces installed in Cisco 7204VXR and Cisco 7206VXR routers.
Cisco IOS Release 11.3(6)NA or later loaded on your Cisco uBR7200 series router supports
nonstandard clock rates (any value from 1200 to 8000000) on PA-4T+ interfaces.
Nonstandard clock rates are rounded (if necessary) to the nearest clock rate that the hardware can
support
The following example shows how to configure a nonstandard clock rate on a PA-4T+ interface in
port adapter slot 1 (1/0) on a Cisco 7200 series, Cisco uBR7200 series, or Cisco 7100 series router:
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)# interface serial 1/0
Router(config-if)# clock rate 1234567
%Clockrate rounded to nearest value that your hardware can support.
%Use Exec Command ‘show running-config’ to see the value rounded to.
Router(config-if)# exit
Router(config)#
The following example shows how to configure a nonstandard clock rate on a PA-4T+ interface in
interface processor slot 3 (3/1/0) on a VIP2:
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)# interface serial 3/1/0
Router(config-if)# clock rate 1234567
%Clockrate rounded to nearest value that your hardware can support.
%Use Exec Command ‘show running-config’ to see the value rounded to.
Router(config-if)# exit
Router(config)#
The following example shows how to determine the exact clock rate that the interface was rounded
to by using the show running-config command (only the relevant output from the show
running-config command is included in the example; other information has been omitted).
Router# show running-config
Building configuration...
...
!
interface Serial 1/0
no ip address
clockrate 1151526
!
...
Inverting the Clock Signal
Systems that use long cables or cables that are not transmitting the TxC (clock) signal might
experience high error rates when operating at higher transmission speeds. If a PA-4T+ DCE port is
reporting a high number of error packets, a phase shift might be the problem. Inverting the clock
might correct this shift.
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Setting the Clock Rate
When the PA-4T+ interface is a DTE, the invert-txc command inverts the TxC signal it receives
from the remote DCE. When the PA-4T+ interface is a DCE, this command inverts the clock signal
to the remote DTE port. Use the no invert-txc command to change the clock signal back to its
original phase.
Inverting the Data Signal
If the interface on the PA-4T+ synchronous serial port adapter is used to drive a dedicated T1 line
that does not have B8ZS encoding (a method to avoid 15 zeros), the data stream must be inverted
(both TxD and RxD) either in the connecting CSU/DSU or the interface. To invert the data stream
coming out of the PA-4T+, use the invert data command.
By inverting the HDLC data stream, the HDLC zero insertion algorithm becomes a ones insertion
algorithm that satisfies the T1 requirements. Be careful not to invert data both on the interface and
on the CSU/DSU because two data inversions will cancel each other out.
Configuring NRZI Format
All PA-4T+ interfaces support nonreturn-to-zero (NRZ) and nonreturn-to-zero inverted (NRZI)
formats. Both formats use two different voltage levels for transmission. NRZ signals maintain
constant voltage levels with no signal transitions (no return to a zero voltage level) during a bit
interval and are decoded using absolute values (0 and 1). NRZI uses the same constant signal levels
but interprets the absence of data (a space) at the beginning of a bit interval as a signal transition and
the presence of data (a mark) as no transition. NRZI uses relational encoding to decode signals rather
than determining absolute values.
NRZ format, the factory default on all interfaces, is most common. NRZI format, which is
configured with a software command, is commonly used with EIA/TIA-232 connections in IBM
environments.
To enable NRZI encoding on any interface, specify the slot and port address of the interface followed
by the command nrzi-encoding [mark]. When you have finished with the configuration change,
press Ctrl-Z (hold down the Control key while you press Z) or enter end to exit configuration mode
and return to the EXEC command interpreter prompt. In the example that follows, the first serial port
on a PA-4T+ in port adapter slot 1 of a Cisco 7200 series, Cisco uBR7200 series, or Cisco 7100
series router is configured for NRZI encoding:
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)# interface serial 1/0
Router(config-if)# nrzi-encoding
Ctrl-Z
Router#
In the example that follows, the first serial port on a PA-4T+ in interface processor slot 3 of a VIP2
is configured for NRZI encoding:
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)# interface serial 3/1/0
Router(config-if)# nrzi-encoding
Ctrl-Z
Router#
To disable NRZI encoding on a port, specify the slot and port address and use the no nrzi-encoding
command. For complete command descriptions and instructions, refer to the Configuration
Fundamentals Configuration Guide publication. If you need more information, see the “Cisco
Connection Online” section on page vii and the “Related Documentation” section on page vi.
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Configuring Half-Duplex and Binary Synchronous Communications
Configuring CRCs
Cyclic redundancy check (CRC) is an error-checking technique that uses a calculated numeric value
to detect errors in transmitted data. All interfaces use a 16-bit CRC (CRC-CITT) by default, but also
support a 32-bit CRC. The sender of a data frame calculates the frame check sequence (FCS). Before
it sends a frame, the sender appends the FCS value to the message. The receiver recalculates the FCS
and compares its calculation to the FCS from the sender. If there is a difference between the two
calculations, the receiver assumes that a transmission error occurred and sends a request to the
sender to resend the frame.
To enable 32-bit CRC on an interface, specify the slot and port address of the interface followed by
the command crc 32. In the example that follows, the first serial port on a PA-4T+ in port adapter
slot 1 of a Cisco 7200 series, Cisco uBR7200 series, or Cisco 7100 series router is configured for
32-bit CRC:
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)# interface serial 1/0
Router(config-if)# crc 32
Ctrl-Z
Router#
In the example that follows, the first serial port on a PA-4T+ on a VIP2 in interface processor slot 3
is configured for 32-bit CRC:
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)# interface serial 3/1/0
Router(config-if)# crc 32
Ctrl-Z
Router#
To disable CRC-32 and return to the default CRC-16 (CRC-CITT) setting, specify the slot and port
address and use the no crc 32 command. For command descriptions, refer to the Configuration
Fundamentals Configuration Guide publication. If you need more information, see the “Cisco
Connection Online” section on page vii and the “Related Documentation” section on page vi.
If you are configuring a PA-4T+ installed on the Cisco 7200 series router, proceed to the following
section “Configuring Half-Duplex and Binary Synchronous Communications,” otherwise, proceed
to the “Checking the Configuration” section on page 8-14.
Configuring Half-Duplex and Binary Synchronous Communications
This section explains how to configure PA-4T+ interfaces for half-duplex and Bisync operation in
Cisco 7100 series and Cisco 7200 series routers.
Note Cisco IOS Release 11.2(7a)P or later supports half-duplex and bisync operation on PA-4T+
port adapters in Cisco 7200 series router.
Cisco IOS Release 12.0(3)T or later, or 12.0(1)XE or later support nonstandard clock rates on
PA-4T+ interfaces installed in Cisco 7204VXR and Cisco 7206VXR routers.
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Configuring Half-Duplex
Configuring Half-Duplex
Use the half-duplex command to configure PA-4T+ interfaces for half-duplex mode; full-duplex
mode is the default for low-speed serial interfaces. Serial DCE interfaces in half-duplex mode can
be configured for controlled-carrier mode or constant-carrier mode; constant-carrier mode is the
default. Use the half-duplex controlled-carrier command to configure a PA-4T+ interface for
controlled-carrier mode. Use the no half-duplex controlled-carrier command to return the
interface to constant-carrier mode.
Controlled-carrier mode sets the PA-4T+ interface to deactivate data carrier detect (DCD) until a
transmission is sent to the interface. After a transmission is received, DCD is activated and the
interface waits a user-configured amount of time, then transmits the data. After the transmission, the
interface waits a user-configured amount of time and then deactivates DCD.
Constant-carrier mode activates DCD at all times.
Follow these steps to configure controlled-carrier mode on a PA-4T+ interface:
Step 1
At the privileged-level prompt, enter configuration mode and specify that the console
terminal will be the source of the configuration subcommands, as follows:
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#
Step 2
Specify the interface to configure for controlled-carrier mode (using the subcommand
interface, followed by the type [serial] and slot/port [port adapter slot number and
interface number] and then the subcommand half-duplex controlled-carrier). The
following example is for the first interface of the port adapter in slot 1:
Router(config)# interface serial 1/0
Router(config-if)# half-duplex controlled-carrier
Step 3
Specify the time that the interface delays when configured for controlled-carrier mode by
entering the half-duplex timer {cts-delay value | cts-drop-timeout value |
dcd-drop-delay value | dcd-txstart-delay value | rts-drop-delay value |
rts-timeout value | transmit-delay value} command. The following example configures
the DCD drop delay on the first interface of the port adapter in slot 1 for 100 milliseconds:
Router(config)# interfaceserial 1/0
Router(config-if)# half-duplex timer dcd-drop-delay 100 ms
Note Table 8-1 lists the default settings for each half-duplex timer.
Step 4
Step 5
After including all of the configuration subcommands, to complete the configuration,
enter Ctrl-Z (hold down the Control key while you press Z) or enter end to exit
configuration mode and return to the EXEC command interpreter prompt.
Write the new configuration to nonvolatile memory as follows:
Router# copy running-config startup-config
[OK]
Router#
This completes the procedure for configuring controlled-carrier mode on a PA-4T+ interface. For
additional information on configuring half-duplex operation on low-speed serial interfaces, refer to
the chapter “Configuring Interfaces” of the Configuration Fundamentals Configuration Guide
publication. If you need more information, see the “Cisco Connection Online” section on page vii
and the “Related Documentation” section on page vi.
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Checking the Configuration
Table 8-1
Half-Duplex Timer Default Settings
Default Settings
(Milliseconds)
Timer
Command Syntax
CTS delay
half-duplex timer cts-delay
0
CTS drop timeout
DCD drop delay
half-duplex timer cts-drop-timeout 250
half-duplex timer dcd-drop-delay
100
DCD transmission start delay half-duplex timer dcd-txstart-delay 100
RTS drop delay
RTS timeout
half-duplex timer rts-drop-delay
half-duplex timer rts-timeout
half-duplex transmit-delay
3
3
0
Transmit delay
Configuring Bisync
To configure PA-4T+ interfaces for Bisync operation in Cisco 7200 series routers, refer to the “Block
Serial Tunneling (BSTUN)” section of the “Configuring Serial Tunnel (STUN) and Block Serial
Tunnel (BSTUN)” chapter of the Bridging and IBM Networking Configuration Guide.
Checking the Configuration
After configuring the new interface, use the show commands to display the status of the new
interface or all interfaces and the ping and loopback commands to check connectivity.
Using show Commands to Verify the New Interface Status
Use the following steps tiuse verify that the new interfaces are configured and operating correctly:
Step 1
Step 2
Step 3
Use the show version command to display the system hardware configuration. Ensure
that the list includes the new serial interfaces.
Display all the current interface processors and their interfaces with the show controllers
command. Verify that the new PA-4T+ appears in the correct slot.
Specify one of the new interfaces:
• Cisco 7100 series, Cisco 7200 series or Cisco uBR7200 series routers—Use the
show interfaces [type slot/port] command.
• VIP2—Use the show interfaces type slot/port-adapter/port command.
Verify that the first line of the display specifies the interface with the correct slot number.
Also verify that the interface and line protocol are in the correct state: up or down.
Step 4
Step 5
Display the protocols configured for the entire system and specific interfaces with the
show protocols command. If necessary, return to configuration mode to add or remove
protocol routing on the system or specific interfaces.
Display the running configuration file with the show running-config command. Display
the configuration stored in NVRAM using the show startup-config command. Verify
that the configuration is accurate for the system and each interface.
If the interface is down and you configured it as up, or if the displays indicate that the hardware is
not functioning properly, ensure that the network interface is properly connected and terminated. If
you still have problems bringing the interface up, contact a service representative for assistance.
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Using show Commands to Display Interface Information
Using show Commands to Display Interface Information
To display information about a specific interface, use the show interfaces command with the
interface type and port address in the format show interfaces [type slot/port] on a Cisco 7200 series,
Cisco uBR7200 series, or Cisco 7100 series router, or show interfaces [type slot/port-adapter/port]
on a VIP2.
Note Output from the show interfaces command displays the PA-4T+ as M4T.
Cisco 7200 Series, Cisco uBR7200 Series, and Cisco 7100 Series show interfaces Command
Following are examples of how the show interfaces [type slot/port] command on a Cisco 7200
series, Cisco 7100 series or a Cisco uBR7200 series router displays status information (including the
physical slot and port address) for the interface you specify. The four PA-4T+ interfaces (0–3) are in
port adapter slot 1.
Router# show interfaces serial 1/0
Serial1/0 is up, line protocol is up
Hardware is M4T
Internet address is 10.10.10.1
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255
Encapsulation PPP, loopback not set, keepalive set (10 sec)
(display text omitted]
Router# show interfaces serial 1/1
Serial1/1 is up, line protocol is up
Hardware is M4T
Internet address is 10.10.10.2
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255
Encapsulation PPP, loopback not set, keepalive set (10 sec)
(display text omitted]
Router# show interfaces serial 1/2
Serial1/2 is up, line protocol is up
Hardware is M4T
Internet address is 10.10.10.3
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255
Encapsulation PPP, loopback not set, keepalive set (10 sec)
(display text omitted]
Router# show interfaces serial 1/3
Serial1/3 is up, line protocol is up
Hardware is M4T
Internet address is 10.10.10.4
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255
Encapsulation PPP, loopback not set, keepalive set (10 sec)
(display text omitted]
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Checking the Configuration
The following example of the show interfaces serial slot/port command on a Cisco 7200 series,
Cisco uBR7200 series, or Cisco 7100 series router shows all of the information specific to the first
PA-4T+ interface port (interface port 0) in port adapter slot 1:
Router# show interfaces serial 1/0
Serial1/0 is up, line protocol is up
Hardware is M4T
Internet address is 10.10.10.1
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255
Encapsulation PPP, loopback not set, keepalive set (10 sec)
LCP Open
Open: ipcp
Last input 00:00:09, output 00:00:09, output hang never
Last clearing of “show interface” counters never
Input queue: 0/75/0 (size/max/drops); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/64/0 (size/threshold/drops)
Conversations 0/1 (active/max active)
Reserved Conversations 0/0 (allocated/max allocated)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
1675 packets input, 26792 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
1676 packets output, 26806 bytes, 0 underruns
0 output errors, 0 collisions, 3 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
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Using show Commands to Display Interface Information
The show version (or show hardware) command displays the configuration of the system hardware
(the number of each port adapter type installed), the software version, the names and sources of
configuration files, and the boot images. Following is an example of the show version command:
Router# show version
Cisco Internetwork Operating System Software
IOS (tm) 7200 Software (C7200-J-M), RELEASED VERSION 11.1(8)CA [sglee 108]
Synced to mainline version: 11.1
Copyright (c) 1986-1997 by cisco Systems, Inc.
Compiled Thu 27-Feb-97 23:54 by sglee
Image text-base: 0x600088F0, data-base: 0x6072C000
ROM: System Bootstrap, Version 11.1(5) RELEASED SOFTWARE
ROM: 7200 Software (software-image), Released Version 11.1(8)CA [sglee 101]
pulp uptime is 2 hours, 19 minutes
System restarted by reload
System image file is “image-name”, booted via tftp from 10.10.10.1
cisco 7206 (NPE150) processor with 26624K/6144K bytes of memory.
R4700 processor, Implementation 33, Revision 1.0 (512KB Level 2 Cache)
Last reset from power-on
Bridging software.
SuperLAT software copyright 1990 by Meridian Technology Corp).
X.25 software, Version 2.0, NET2, BFE and GOSIP compliant.
TN3270 Emulation software (copyright 1994 by TGV Inc).
Chassis Interface.
3 Ethernet/IEEE 802.3 interfaces.
1 FastEthernet/IEEE 802.3 interface.
4 Serial interfaces.
125K bytes of non-volatile configuration memory.
1024K bytes of packet SRAM memory.
8192K bytes of Flash PCMCIA card at slot 0 (Sector size 128K).
4096K bytes of Flash internal SIMM (Sector size 256K).
Configuration register is 0x0
Use the show diag command to view all the port adapter types installed in your system. Use the
show diag slot command to view information about a port adapter installed in a specific port adapter
slot. In the following example, a PA-4T+ in port adapter slot 1 is used:
Router# show diag 1
Slot 1:
Mx serial port adapter, 4 ports
Port adapter is analyzed
Port adapter insertion time 02:19:52 ago
Hardware revision 1.0
Board revision UNKNOWN
Serial number
Test history
3701161
0x0
Part number
RMA number
73-1577-03
00-00-00
EEPROM format version 1
EEPROM contents (hex):
0x20: 01 0C 01 00 00 38 79 A9 49 06 29 03 00 00 00 00
0x30: 05 00 00 00 FF FF FF 00 FF FF FF FF FF FF FF FF
For command descriptions and examples for Cisco 7200 series, Cisco 7100 series or
Cisco uBR7200 routers, refer to the publications listed in the “Related Documentation” section on
page vi. Proceed to the “Using ping and loopback Commands” section on page 8-21.
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Checking the Configuration
VIP2 show interfaces Command
Following are examples of how the show interfaces [type slot/port-adapter/port] command displays
status information (including the physical slot and port address) for the interfaces you specify. The
four PA-4T+ interfaces (0–3) are in interface processor slot 3, in port adapter slot 1.
Router# show interfaces serial 3/1/0
Serial3/1/0 is up, line protocol is up
Hardware is cyBus Serial
Internet address is 10.10.10.1
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255
Encapsulation PPP, loopback not set, keepalive set (10 sec)
[display text omitted]
Router# show interfaces serial 3/1/1
Serial3/1/1 is up, line protocol is up
Hardware is cyBus Serial
Internet address is 10.10.10.2
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255
Encapsulation PPP, loopback not set, keepalive set (10 sec)
[display text omitted]
Router# show interfaces serial 3/1/2
Serial3/1/2 is up, line protocol is up
Hardware is cyBus Serial
Internet address is 10.10.10.3
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255
Encapsulation PPP, loopback not set, keepalive set (10 sec)
[display text omitted]
Router# show interfaces serial 3/1/3
Serial3/1/3 is up, line protocol is up
Hardware is cyBus Serial
Internet address is 10.10.10.3
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255
Encapsulation PPP, loopback not set, keepalive set (10 sec)
[display text omitted]
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Using show Commands to Display Interface Information
The following example of the show interfaces serial slot/port-adapter/port command shows all of
the information specific to the first PA-4T+ interface port (interface port 0) in port adapter slot 1:
Router# show interfaces serial 3/1/0
Serial3/1/0 is up, line protocol is up
Hardware is cyBus Serial
Internet address is 10.10.10.1
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255
Encapsulation PPP, loopback not set, keepalive set (10 sec)
LCP Open
Open: ipcp
Last input 00:00:08, output 00:00:08, output hang never
Last clearing of “show interface” counters never
Input queue: 0/75/0 (size/max/drops); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/64/0 (size/threshold/drops)
Conversations 0/1 (active/max active)
Reserved Conversations 0/0 (allocated/max allocated)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
14 packets input, 216 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
14 packets output, 216 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
1 carrier transitions
RTS up, CTS up, DTR up, DCD up, DSR up
Configuring the PA-4T+ Interfaces 8-19
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Checking the Configuration
The show version (or show hardware) command displays the configuration of the system hardware
(the number of each interface processor type installed), the software version, the names and sources
of configuration files, and the boot images. Following is an example of the show version command
used with a Cisco 7500 series router:
Router# show version
Cisco Internetwork Operating System Software
IOS (tm) GS Software (image-name), Version 11.1(8)CA, RELEASED SOFTWARE
Synced to mainline version: 11.1(8)
Copyright (c) 1986-1997 by cisco Systems, Inc.
Compiled Thu 23-Jan-97 18:14 by bellb
Image text-base: 0x60010900, data-base: 0x609EE000
ROM: System Bootstrap, Version 11.5 [kmac 3.2], RELEASED SOFTWARE
ROM: GS Software (image-name), Released version 11.1(5) [sglee 112]
GEN1 uptime is 2 minutes
System restarted by reload
System image file is “image-name”, booted via tftp from 10.10.10.1
cisco RSP2 (R4600) processor with 32768K bytes of memory.
R4600 processor, Implementation 32, Revision 2.0
Last reset from power-on
G.703/E1 software, Version 1.0.
SuperLAT software copyright 1990 by Meridian Technology Corp).
Bridging software.
X.25 software, Version 2.0, NET2, BFE and GOSIP compliant.
TN3270 Emulation software (copyright 1994 by TGV Inc).
Chassis Interface.
1 VIP2 controller (4 Ethernet)(4 Serial).
4 Ethernet/IEEE 802.3 interfaces.
4 Network Serial interfaces.
125K bytes of non-volatile configuration memory.
16384K bytes of Flash PCMCIA card at slot 1 (Sector size 128K).
8192K bytes of Flash internal SIMM (Sector size 256K).
Configuration register is 0x0
8-20
PA-4T+ Synchronous Serial Port Adapter Installation and Configuration
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Using ping and loopback Commands
Use the show diag command to view all the interface types installed in your system. Use the show
diag slot command to view information about port adapters on a VIP2 that is installed in your
system, as shown in the following example of a PA-4T+ on a VIP2 that is in interface processor
slot 3:
Router# show diag 3
Slot 3:
Physical slot 3, ~physical slot 0x6, logical slot 3, CBus 0
Microcode Status 0xC
Master Enable, LED, WCS Loaded
Board is analyzed
Pending I/O Status: Console I/O
EEPROM format version 1
VIP2 controller, HW rev 2.2, board revision UNKNOWN
Serial number: 03517093 Part number: 73-1684-03
Test history: 0x00
RMA number: 00-00-00
Flags: cisco 7000 board; 7500 compatible
EEPROM contents (hex):
0x20: 01 15 02 03 00 35 AA A5 49 06 94 03 00 00 00 00
0x30: 50 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Slot database information:
Flags: 0x4
Insertion time: 0x5314 (01:20:55 ago)
Controller Memory Size: 8 MBytes DRAM, 1024 KBytes SRAM
PA Bay 0 Information:
Mx Serial PA, 4 ports
EEPROM format version 1
HW rev 1.0, Board revision 154
Serial number: 03699540 Part number: 73-1577-03
PA Bay 1 Information:
Ethernet PA, 4 ports
EEPROM format version 1
HW rev 1.0, Board revision 160
Serial number: 02023164 Part number: 73-1556-03
For complete VIP2 command descriptions and examples, refer to the publications listed in the
“Related Documentation” section on page vi. Proceed to the following section “Using ping and
loopback Commands.”
Using ping and loopback Commands
The packet internet groper (ping) and loopback commands allow you to verify that an interface port
is functioning properly and to check the path between a specific port and connected devices at
various locations on the network. This section provides brief descriptions of these commands. After
you verify that the system has booted successfully and is operational, you can use these commands
to verify the status of interface ports. Refer to the publications listed in the “Related Documentation”
section on page vi for detailed command descriptions and examples.
The ping command sends an echo request out to a remote device at an IP address that you specify.
After sending a series of signals, the command waits a specified time for the remote device to echo
the signals. Each returned signal is displayed as an exclamation point (!) on the console terminal;
each signal that is not returned before the specified time-out is displayed as a period (.). A series of
exclamation points (!!!!!) indicates a good connection; a series of periods (.....) or the messages
[timed out] or [failed] indicate that the connection failed.
Configuring the PA-4T+ Interfaces 8-21
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Checking the Configuration
Following is an example of a successful ping command to a remote server with the address
10.10.10.10:
Router# ping 10.10.10.10 <Return>
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echoes to 10.10.10.10, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/15/64 ms
Router#
If the connection fails, verify that you have the correct IP address for the server and that the server
is active (powered on), and repeat the ping command.
The loopback test allows you to detect and isolate equipment malfunctions by testing the connection
between the PA-4T+ interface and a remote device such as modems or CSU/DSUs. The loopback
subcommand sends a series of packets out to and through the device (or cable), and back to the
PA-4T+ interface. If the packets complete the loop, the connection is good. If not, you can isolate a
fault to the remote device or interface cable in the path of the loopback test.
Note You must configure a clock rate on the port before performing a loopback test. However, if no
cable is attached to the port, the port is administratively up, and the port is in loopback mode, you
do not have to configure a clock rate on the port before performing a loopback test.
Depending on the mode of the port, issuing the loopback command checks the following path:
• When no interface cable is attached to the PA-4T+ interface, or if a DCE cable is attached to a
port that is configured as line protocol up, the loopback command tests the path between the
network processing engine and the interface port only (without leaving the network processing
engine and port adapter).
• When a DTE cable is attached to the port, the loopback command tests the path between the
network processing engine and the near (network processing engine) side of the DSU or modem
to test the PA-4T+ interface and interface cable.
For complete descriptions of interface subcommands and the configuration options available for
Cisco 7200 series routers, Cisco uBR7200 series, and Cisco 7100 series routers, and VIP2
interfaces, refer to the publications listed in the“Related Documentation” section on page vi.
Note The X.21 interface definition does not include a loopback definition. On the PA-4T+, the X.21
DTE interface does not support the loopback function. Because of the internal clock signal present
on the PA-4T+ interfaces, loopback will function on an X.21 DCE interface.
8-22
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