Specifications

December 2008 Page 11–5
Chapter 11. Optical Transceiver Module
11
11.4 Specifications
The Optical Transceiver Module’s technical spec-
ifications are shown in Table 11-1.
Figure 11–4. Optical Transceiver Module
Status Indicators – Main Board.
11.4.1 Status Indicators
There are four sets of status indicators for the
Optical Transceiver Module:
•Main board
•Hot standby auxiliary board
•Four-fiber main board
•Four-fiber hot standby auxiliary board
11.4.1.1 Main Board Status Indicators
The Optical Transceiver Module’s main board
status indicators, are shown in Figure 11-4. The
red/green status LED is green if the module is
functional and red if the module is non-functional.
The remaining LEDs help you to troubleshoot
transmission problems in a network. Beginning at
the top left, they work as follows:
Figure 11–5. Hot-Standby Optical Transceiver
Module Status Indicators – Auxiliary Board.
LSIG-A – (Low signal on A) This red LED, when
lit, indicates that the signal level received on
transceiver A is too low or non-existent.
LSIG-B – (Low signal on B) This red LED, when
lit, indicates that the signal level received on
transceiver B is too low or non-existent.
Note: some older modules may have additional
LEDs which are no longer used.
11.4.1.2 Hot Standby Auxiliary Board
Status Indicators
The hot standby auxiliary module has an addi-
tional six LEDs, as shown in Figure 11-5.
Beginning at the top left, they work as follows:
RCVR-A – (Receiver A active) This green LED,
when lit, indicates that the signal on Receiver A is
the one being processed.
RCVR-C – (Receiver C active) This green LED,
when lit, indicates that the signal on Receiver C is
the one being processed.
LSIGC – (Low signal on C) This red LED, when
lit, indicates that the signal level received on
transceiver C is too low or non-existent.
LSIGD – (Low signal on D) This red LED, when
lit, indicates that the signal level received on
transceiver D is too low or non-existent.
COMPONENT
SIDE
SOLDER
SIDE
LSIG–D
RCVR–A
RCVR–B
RCVR–C
RCVR–D
LSIG–C
COMPONENT
SIDE
SOLDER SIDE
LSIG–BLSIG–A
STATUS LED
INJECT/EJECT
LEVER