Nlynx Network Card GEMINI EXPRESS MULTIPLEXER User Manual

GEMINI EXPRESS MULTIPLEXER  
User’s Guide  
Document # 400-2601-01  
Rev. C  
October, 2002  
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Active data pins  
Configurable per customer requirement  
12 dB (typical)  
Optical Specifications  
Fiber optic budget (point to  
point)  
Fiber optic budget (ring)  
3 unit ring  
4 unit ring  
Peak power wavelength  
Fiber optic connectors  
Classification of LED Transmitter Device Important:  
The optical transmitter contains an LED system and is classified “CLASS 1 LED  
PRODUCT” per EN60825-1 (+A11), Safety of Laser Products. Contact NLynx  
Technologies for repair if your GEMINI EXPRESS MULTIPLEXER ever  
requires maintenance.  
SPECIFICATIONS  
Protocol  
5250  
1 & 2Mbps (transparent)  
8
Data rate  
Number of ports  
Port connector types  
Cable Distances  
Shielded RJ45 or DB25  
Cable Type  
Category 3  
Category 3  
Category 3  
Category 3  
Category 3  
Category 3  
Category 5  
Category 5  
Category 5  
Category 5  
Category 5  
Category 5  
Data Rate  
1X  
1X  
1X  
2X  
2X  
2X  
1X  
1X  
1X  
2X  
2X  
2X  
Location  
Host to GXM  
GXM to Device  
GXM to GEMINI HUB up to 1000 ft  
Host to GXM  
GXM to Device  
GXM to GEMINI HUB up to 500 ft  
Host to GXM  
GXM to Device  
GXM to GEMINI HUB up to 1200 ft  
Host to GXM  
GXM to Device  
GXM to GEMINI HUB up to 900 ft  
Distance  
up to 2000 ft  
up to 1800 ft  
up to 1000 ft  
up to 900 ft  
up to 2000 ft  
up to 2200 ft  
up to 1500 ft  
up to 1650 ft  
·
Note: Distances must be  
derated as follows:  
62 ft per category  
interconnect for 1X.  
38 ft per category  
interconnect for 2X.  
16 ft per category  
interconnect for 1X.  
11 ft per category  
interconnect for 2X.  
Cable distances over 1000’  
·
3
3
5
5
·
·
·
·
must be derated by 25% for  
ring applications.  
Distance (fiber optic backbone)  
62.5 micron multimode fiber  
up to 2 Kilometers  
Point to Point  
Ring (3 Units)  
up to 1.5 Kilometers between units and up  
to 4.5 Kilometers overall.  
up to 1 Kilometers between units and up  
to 4 Kilometers overall.  
Ring (4 Units)  
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·
Verify that the host work station controller’s (WSC) capacity has not  
been exceeded.  
INTRODUCTION  
This user's manual presents the GEMINI EXPRESS MULTIPLEXER for use with  
the IBM 5250 protocol. The 5250 family of products consists of the IBM's  
System 34, 36, 38, and the AS/400 along with many supporting devices  
manufactured by IBM and other companies. The GEMINI EXPRESS  
MULTIPLEXER works with all supporting devices that are designed within the  
5250 specifications.  
·
Verify that the device is properly terminated. A peripheral is terminated  
when its twiaxial port has two 54.9 ohm resistors located between the “A”  
phase pin & earth ground and the “B” phase pin & earth ground. Termination  
is provided by a “Y” or “T” cable assembly or by a terminating balun (i.e.  
ASFT series).  
Verify that there are no polarity reversals in the cable.  
Verify that the cable distance does not exceed the GEMINI EXPRESS  
MULTIPLEXER specification.  
·
·
GEMINI EXPRESS MULTIPLEXER  
·
·
·
·
Verify that the cable is data grade.  
Verify that the wiring uses natural pairs.  
Decision Data’s MULTIPLEXER Gemini Eight-Port Express Fiber Optic  
Multiplexer offers the unique ability to allow multiple AS/400 controller polling  
groups to be transmitted over a single fiber optic pair. This feature allows all new  
AS/400e controllers to provide their maximum throughput potential, in either  
1Mbps Optimized or 2Mbps Express mode, by transparently multiplexing the  
"split-polling" feature without requiring performance robbing PTF's. All new  
IBM controllers support the "split-polling" feature as a means of achieving higher  
throughput rates, even when connected to standard legacy devices. The Gemini  
Express Multiplexer allows the "split-polling" feature to remain "enabled" with  
performance of up to 4 times greater than standard legacy 1Mbps 5250 protocol.  
The Gemini Express Multiplexer has 8 Shielded RJ45 port connections as well as  
a DB25 "direct-connection" eliminating the need for the twinax "brick" and  
associated twinaxial cabling. Link connectivity is via ST fiber optic multi-mode  
connection with ability to operate in both point-to-point and multi-point "ring"  
topologies, reducing hardware requirements by up to 50%. Other features include  
Advanced Noise Filtering, LED Port Diagnostics, Configurable UTP Pin  
Assignments, and a Field Replaceable wide-ranging Power Supply.  
Verify that the wiring avoids sources of environmental noise.  
Verify that the balun’s pinout matches the GEMINI EXPRESS  
MULTIPLEXER ’s pinout.  
Verify that the host side balun’s pinout/polarity match the device side balun’s  
pinout/polarity.  
·
Devices interfere with each other!  
·
Verify that there is one host-polling group per GEMINI EXPRESS  
MULTIPLEXER polling group.  
Verify that devices on star segments have unique addresses.  
Verify that all devices are properly terminated.  
·
·
Devices cannot operate in Express mode!  
·
·
·
·
·
Verify that the host and the device are capable of Express mode.  
Verify that all interconnecting components support the Express mode.  
Verify that all devices on the port are Express ready.  
Verify that all cable distances are within the Express specification.  
The controller may have down shifted to 1MBPS due to errors during  
installation. The controller will retry the Express mode in approximately one  
hour.  
Flashing Express LEDs!  
·
Determine the number of Express devices on the port. If there are less than  
seven devices, the flashing Express LED is normal.  
Express LED on without data activity!  
·
If the host is disconnected during an express connection, the express LED  
remains on.  
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UNPACKING  
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Remove the packing material and check for the items below:  
If problems are encountered with the GEMINI EXPRESS MULTIPLEXER, the  
following guideline is intended to provide a quick resolution.  
1.) Collect all information relevant to this application.  
·
·
·
·
·
·
GEMINI EXPRESS MULTIPLEXER serial numbers  
Host type and operating system software level.  
Quantity, and type of peripheral devices.  
Interconnecting cable types and distances.  
Equipment environment.  
GEMINI EXPRESS MULTIPLEXER  
A (100-240 VAC) input external power supply is attached on the rear panel.  
Interconnection diagrams.  
USER'S MANUAL  
AC POWER CORD  
2.) Setup the application with all Multiplexers in one room interconnected with  
fiber optic jumpers. Verify the application with a host port and a terminal.  
Gemini Multiplexer  
Users Guide  
3.) Search through the common problems and possible causes provided below.  
The GEMINI EXPRESS MULTIPLEXER front panel power LED is off!  
·
·
Verify that the AC & DC connections are proper.  
Verify that the AC outlet is functioning correctly.  
If the problem persists, observe the status of the external power supply’s LED and  
contact Decision Data’s technical support.  
NLynx  
(North American units only)  
The GEMINI EXPRESS MULTIPLEXER RX LED is off or flashing!  
·
·
Verify that the fiber optic connectors are properly connected.  
Verify that the fiber optic budget and distance has not been exceeded.  
Visually inspect all items for damage. If any component is damaged, contact  
NLynx Technologies for a replacement.  
The GEMINI EXPRESS MULTIPLEXER TX LED is off!  
Contact DECISION DATA technical support.  
DO NOT APPLY POWER TO ANY DAMAGED COMPONENT!  
·
If problems persists, Contact DECISION DATA technical support.  
A device is down or unstable!  
·
Verify that there is one host polling group per GEMINI EXPRESS  
MULTIPLEXER polling group.  
·
Verify that the host’s device type matches the device.  
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1. The external power supply is mounted on the rear panel of the  
GEMINI EXPRESS MULTIPLEXER. The AC power cord must be  
firmly inserted into the external power supply and strained relieved.  
ACTIVE PAIR SETUP  
All GEMINI EXPRESS MULTIPLEXERS can be factory configured per  
customer request. The factory default setting is Pins 4 & 5. Different  
configurations will be indicated on the label on the bottom of the unit.  
2. Insert the male end of the AC power cord into a properly wired  
receptacle. All data & mode LED’s on the GEMINI EXPRESS  
MULTIPLEXER will activate for two seconds and fade off. The  
amber power LED on the front panel, the green power LED on the  
top of the external power supply, and the “TX & RX” LEDs will  
activate and remain on. If any terminals are on, the data activity  
LEDs will activate. If express devices and an express host, are  
attached, the port status LEDs (upper green LEDs) will activate.  
Devices in a ring application will not show a sign on screen until the  
ring is complete.  
MODEL GXM8-45  
PINS  
S/N  
4/5 3/6 1/2  
xxxxxxxxxx  
IDENTIFICATION LABEL  
The active pair may be re-configured by performing the following procedure:  
·
·
·
·
Disconnect all power to the unit.  
Remove the two top cover screws located on the rear panel.  
Gently slide the top cover back one inch.  
Hold the top cover and tilt it up.  
Reconfigure the jumpers located behind the RJ45 connectors as required. Settings  
for polarity and active pair assignment are shown below:  
ACTIVE PAIR JUMPER SETTINGS  
It should be noted that connections to the DB25 and the RJ45s are mutually  
exclusive. If any of the three pairs of the RJ45 are selected, the DB25 is  
disconnected. If the DB25 is selected, the RJ45s are disconnected. All jumper  
settings must be identical. To reinstall the top cover, tilt the top cover down, and  
slide the top cover forward until it mates completely with the bottom cover.  
Install the 2 top cover screws.  
RJ45  
RJ45  
RJ45  
RJ45  
DB25  
RJ45 (4/5) RJ45 (3/6) RJ45 (1/2)  
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MULTIPLEXER will activate for two seconds and fade off. The  
amber power LED on the front panel, the green power led on the top of  
the external power supply, and the TX LED will activate and remain on.  
At this time the data activity LEDs will flash at the host’s polling rate.  
The RX LED will be off until the remote Multiplexer is installed.  
DESCRIPTION  
The GEMINI EXPRESS MULTIPLEXER’s indicators and connections are  
described below.  
Device side Multiplexer installation.  
1) Set the configuration switches on the rear panel of the device side  
GEMINI EXPRESS MULTIPLEXER as follows:  
Polling  
Group 1  
Polling  
Group 2  
Power  
LED  
SWITCH 1 OFFSWITCH 2 ON for a point to point application  
Fiber  
Status  
LEDs  
or  
SWITCH 1 OFFSWITCH 2 OFF for a ring application.  
2) The MULTIPLEXER is designed for a 19” rack. The unit should be  
properly installed using all four mounting holes. Rack hardware is not  
provided. It is recommended that plastic or nylon washers be used under  
mounting screws to protect the star’s finish.  
Power LED Amber LED activates when the GEMINI EXPRESS  
MULTIPLEXER is powered up.  
TX Activity LED Green LED activates when a signal is transmitted to the fiber  
optic aggregate link.  
WARNING  
DO NOT LOOK INTO ANY FIBER OPTIC  
RX Activity LED Green LED activates when a signal is received from the fiber  
optic aggregate link and the MULTIPLEXER synchronizes to it.  
Polling Group Status LEDs The upper green LEDs are express mode indicators.  
These LEDs activate when an express signal is detected and remain on until a  
1MBPS signal is detected or a system reset occurs. The lower green LEDs are  
data activity indicators. These LEDs activate when a signal is present.  
Polling Group Connectors There are two polling groups. Each polling group has  
been divided into two port groups. Polling group #1 consists of ports 0 - 3 (port  
groups A & B) and Polling group #2 consists of ports 4 - 7 (port groups C & D).  
Ports within a polling group must be connected to ports from a common  
controller.  
CONNECTOR OR FIBER OPTIC CABLE!  
3. The GEMINI EXPRESS MULTIPLEXER has ST style fiber optic  
connectors. For point to point applications, connect the multimode fiber  
optic cable attached to the host side Multiplexer ’s ”TX” to the device  
side multiplexer ’s ”RX” optical link connector located on the rear panel  
of the GEMINI EXPRESS MULTIPLEXER , and connect the  
multimode fiber optic cable attached to the host side Multiplexer ’s ”RX”  
to the device side Multiplexer ’s ”TX” optical link connector located on  
the rear panel of the GEMINI EXPRESS MULTIPLEXER. For ring  
applications, connect the fiber optic TX of a Multiplexer to the fiber optic  
RX of the next multiplexer down stream in the ring until the ring is  
complete. Ensure that the cables are properly strained relieved and  
labeled.  
4. Connect the GEMINI EXPRESS MULTIPLEXER ports to the host ports  
of the GEMINI active or passive star and follow the installation  
procedure for the star.  
F I B E R  
P
R
O
D
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C
T
D
B 2 5  
O
P T I C  
I D E N T I F I C A T I O  
L A B E L  
N
L I N  
K
F C C L A B E L  
E X T E R  
N
A
L
P
O
W
E R  
S
U
P
P
L Y  
C O  
N
F I G U R A T I O  
E S  
N
D
C
C
O
P
O
W
E R  
S
W
I
T
C
H
N
N
E C  
T
I
O
N
R E A R V I E W  
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INSTALLATION  
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Host side Multiplexer installation.  
The configuration switch settings are shown below.  
1. Set the configuration switches on the rear panel of the host side  
GEMINI EXPRESS MULTIPLEXER as follows:  
POINT TO POINT MODE  
HOST SIDE MULTIPLEXER  
ON  
SWITCH 1 ON SWITCH 2 ON for a point to point application  
or  
SWITCH 1 ON SWITCH 2 OFF for a ring application.  
1
2
LEGEND  
2. The GEMINI EXPRESS MULTIPLEXER is designed for a 19”  
rack. The unit should be properly installed using all four mounting  
holes. Rack hardware is not provided. It is recommended that  
plastic or nylon washers be used under mounting screws to protect  
the chassis’s finish.  
SWITCH 1: ON  
SWITCH 2: ON  
CONFIGURATION SWITCHES  
HOST SIDE MULTIPLEXER  
ON  
3. A polling group is a group of ports which have one port active at a  
time. The new AS/400 work station controllers (WSC) have two  
polling groups. Ports 0-3 and ports 4-7 constitute the two groups.  
The GEMINI EXPRESS MULTIPLEXER can accommodate two  
RING MODE  
1
2
LEGEND  
SWITCH 1: ON  
SWITCH 2: OFF  
CONFIGURATION SWITCHES  
polling in the same fashion.  
The GEMINI EXPRESS  
MULTIPLEXER polling group #1 consists of ports 0-3 and  
GEMINI EXPRESS MULTIPLEXER polling group #2 consists of  
ports 4-7. Do not connect more than one host polling group to a  
GEMINI EXPRESS MULTIPLEXER polling group. Connect the  
host ports to the GEMINI EXPRESS MULTIPLEXER ports.  
POINT TO POINT MODE  
ON  
DEVICE SIDE  
MULTIPLEXER  
WARNING  
DO NOT LOOK INTO ANY FIBER OPTIC  
1
2
CONNECTOR OR FIBER OPTIC CABLE!  
LEGEND  
SWITCH 1: OFF  
SWITCH 2: ON  
CONFIGURATION SWITCHES  
4. The GEMINI EXPRESS MULTIPLEXER has ST style fiber optic  
connectors. Connect the multimode fiber optic cables to the optical  
link connectors located on the rear panel of the MULTIPLEXER.  
Note the fiber color or number on the “TX’ & “RX” to ensure proper  
connection at the remote multiplexer location. Strain relieve and  
label all cables.  
ON  
DEVICE SIDE  
MULTIPLEXER  
RING MODE  
5. The external power supply is mounted on the rear panel of the  
GEMINI EXPRESS MULTIPLEXER. The AC power cord must be  
firmly inserted into the external power supply and strained relieved.  
1
2
LEGEND  
SWITCH 1: OFF  
SWITCH 2: OFF  
CONFIGURATION SWITCHES  
6. Insert the male end of the AC power cord into a properly wired  
receptacle. All data & mode LED’s on the GEMINI EXPRESS  
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MODE DESCRIPTION  
A “POINT TO POINT” link is comprised of two Multiplexer s connected by a  
single backbone. A diagram of a “POINT TO POINT” link is provided below.  
62.5 micron multimode fiber  
GXM8  
STAR  
GXM8  
SYSTEM 3X  
UTP cabling  
PATCH  
PANEL  
Mul  
tiple Multiplexers which are connected in series with fiber optic transmit to fiber  
optic receive constitute a “RING” topology. A diagram of a “RING”application is  
provided below.  
Balun & T cable  
Up to 8 Twinax Ports  
& ASF Baluns  
WALL  
PLATE  
Typical System 3X Installation  
HHOOSSTTPPOORRTT  
CONNECTIONS  
FIBER OPTIC BACKBONE  
FIBER OPTIC BACKBONE  
DEVICE  
DEVICE  
CONNECTIONS  
CONNECTIONS  
MULTIPLEXER  
MULTIPLEXER  
MULTIPLEXER  
MULTIPLEXER  
62.5 micron multimode fiber  
COLLAPSED RINGS  
The Ring mode is seldom implemented as depicted in the previous section.  
Typically, fiber optic cables star out from a central location. Therefore, a ring is  
created by interconnecting the fiber optic star segments at the central location.  
This technique is known as a collapsed ring.  
Remote  
Controller  
GXM8  
GXM8  
STARS  
UTP cabling  
M D F  
F I B E R O P T I C  
P A T C H P A N E L  
PATCH  
PANEL  
F I B E R  
O P T I C  
Balun & T cable  
J U M P E R S  
Two 4 Port Twinax  
WALL  
PLATE  
Bricks & ASF Baluns  
H
O
S
T
M
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T
I
P
L
E
X
E R  
T X R X  
Typical Remote Controller Installation  
(WSC) and the older WSCs is the number of polling groups. The older WSCs had  
one polling group for all eight ports. The newer WSCs have two polling groups.  
Divide the TWINAX brick in two. Ports 0-3 comprise one polling group and  
ports 4-7 make up the other polling group. The TWINAX Brick Detail illustrates  
a proper connection.  
I D F  
R
E
M
O
T
E
M
U
L
T
I
P
L
E
X
E
R
# 1  
T X R X  
I D F  
R
E
M
O
T
E
M
U
L
T
I
P
L
E
X
E
R
#
2
T X R X  
I D F  
R
E
M
O
T
E
M
U
L
T
I
P
L
E
X
E
R
#
3
T X R X  
COLLAPSED RING  
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CONNECTIONS  
62.5 micron multimode  
GXM  
62.5 micron multimode  
GXM  
UTP cabling  
STAR  
GXM  
GXM  
STARS  
PATCH  
UTP cabling  
PANEL  
AS/400  
PATCH  
PANEL  
Balun & T cable  
AS/400  
DB25 to DB25  
STP CABLE  
Balun & T cable  
8 Port Twinax Brick  
ASF Baluns. See  
below for  
WALL  
PLATE  
WALL  
PLATE  
Typical AS/400 Installation  
TO AS/400 WSC  
POLLING GROUP# 1  
POLLING GROUP# 2  
TO GXM  
PORT# 0  
TO GXM  
PORT# 4  
ASF BALUN  
0
1
ASF BALUN  
ASF BALUN  
4
5
ASF BALUN  
ASF BALUN  
PORT# 1  
PORT# 2  
PORT# 3  
PORT# 5  
PORT# 6  
PORT# 7  
2
3
ASF BALUN  
ASF BALUN  
6
7
ASF BALUN  
PORT & POLLING GROUP ASSIGNMENTS  
ON THE TWINAX BRICK FOR THE NEW AS/400 WSC  
WITH SPLIT POLLING FEATURE  
FRONT VIEW  
AS/400 TWINAX Brick Detail  
A major difference between the newer AS/400 work station controllers  
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