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SSIM-T8-04 Token Ring
SmartStack Interface Module
Introduction
The SmartStack SSIM-T8-04 provides four additional Token
Ring ports for the base SmartStack STS16-20RM or FRM
Token Ring Switch. These ports are IEEE 802.5J compliant.
Figure 1. SmartStack SSIM-T8-04 Front Panel
The SSIM-T8-04 ports support Token Ring multimode fiber
media via dual ST-compatible optical receptacles. Each port
provides either shared (half-duplex), 4 or 16 Mbps
connections to 802.5j compliant ports (like TRFOT-2), or full-
duplex 32 Mbps connections to another SmartStack SSIM-T8-
04 Interface Module. In addition to the Token-Ring
connectors, there are ten LEDs on the SSIM-T8-04 front
panel. These LEDs indicate the operational status of the SSIM-
T8-04 and the ports.
SSIM-T8-04 Module Package Contents
Your interface module package contains the following items:
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One SSIM-T8-04 SmartStack Interface Module for the
SmartStack Token Ring Switch
•
One SSIM-T8-04 SmartStack Interface Module
Installation Guide (this document)
Installation
1. Power off the base switch by unplugging it.
2. Remove the plate covering the expansion slot on the front
of the base switch by unscrewing the two retaining
thumbscrews. Keep the plate for use in the event that the
interface module is ever removed.
3. Carefully insert the SSIM-T8-04 into the rails on each side
of the expansion slot, sliding it back until the connector on
the module is seated into the connector at the back of the
slot. When the SSIM-T8-04 is fully seated, its faceplate
will be flush with the front of the base switch.
4. Secure the interface module with the two attached
thumbscrews.
Cabling
For backbone cabling, 62.5/125 micron, multimode optical
fiber cable that meets the ISO/IEC 11801 standard or the EIA/
TIA 568A standard, is recommended. The recommended
maximum cable length is 2000 m (1.2 mi). Each port is
terminated in an ST fiber connection. The correct cable
connection is Fiber Transmitter to Fiber Receiver.
The ST connectors marked TX/RX send/receive 850 nm
infrared light to an attached device.
LEDs
Table 1 lists the two status LEDs on the left front of the
interface module and their meanings. Table 2 lists the port
LEDs on the right of the interface module and their meanings.
Note: Both status LEDs are on for several seconds after a
reset. The LEDs go off before the start of diagnostics.
Table 1. Status LEDs and their Meanings
Table 2. Port LEDs and their Meanings
Testing the Interface Module
1. Power on the base switch to start diagnostics. The
SmartStack Token Ring switch indicates that diagnostics
are in progress by turning on its DIAG LED. After about a
minute, the interface module DIAG LED will also be
turned on.
2. Verify that the base switch diagnostics have been
completed successfully. On the SmartStack Token Ring
switch this is indicated when its DIAG LED is turned off,
and the ERR LED stays turned off. Diagnostics can take up
to four minutes to complete.
3. Verify that the ERR LED on the interface module is off. If
it is off, diagnostics have been successfully completed, and
the SSIM-T8-04 is ready for configuration.
Configuration
The SSIM-T8-04 ports can be configured just like the base
switch ports. They will appear as additional ports on any
configuration panel where ports are listed. The port numbers
will begin where the numbers of the base switch stop.
If for example the base switch has 20 ports and an interface
module in the left front panel slot, the module ports will appear
after Port 20 on the various port configuration panels and be
designated 21, 22, 23 and 24. If the module is in the right front
panel slot, the ports will be designated 25, 26, 27 and 28.
Follow the instructions contained in the SmartStack STS16-
20RM/STS16-20FRM Token Ring Switch, Installation and
User Guide for configuring the interface module ports.
When connecting one STS16-20RM switch to another STS16-
20RM switch using the SSIM-T8-04 Interface Module, one
end of the fiber connection must be manually configured as
“ADAPTER”, and the other end as “PORT”. Use the
SmartStack Token Ring Switch Port Configuration menu.
When connecting ports on the SmartStack SSIM-T8-04
Interface Module to non IEEE 802.5j compliant devices, the
Interface Module fiber ports must be manually set to RI/RO
port mode to ensure that a connection can be established.
When connecting ports on the SmartStack SSIM-T8-04
Interface Module to other fiber equipment that supports FDX
(full-duplex) connections, the interface module fiber ports
1
2
TX
TX
RX
TX
RX
3
RX
TX
RX INS
4
ACT
ACT
ACT
ACT
ERR
INS
INS
INS
DIAG
LED
Position
State
Meaning
DIAG
(green)
Top
On
Diagnostics are in
progress.
Off
The interface module is
working correctly.
ERR
(yellow)
Bottom
On
A interface module
failure has occurred.
Off
The interface module is
working correctly.
LED
Position
State
Meaning
INS
(green)
Top
On
The attached device is
connected to the interface
module port.
ACT
(green)
Bottom
On or
blinking
Data is being transmitted
or received by the port.
