Specifications

Page 11–6
FOCUS System Manual
RCVR-B – (Receiver B active) This green LED,
when lit, indicates that the signal on Receiver B is
the one being processed.
Figure 11–6. Optical Transceiver Module
Status Indicators – Four-Fiber Main Board.
RCVR-D – (Receiver D active) This green LED,
when lit, indicates that the signal on Receiver D is
the one being processed.
11.4.1.3 Four-Fiber Main Board Status
Indicators
The main board for the Optical Transceiver
Module’s four-fiber version has five status indica-
tors, as shown in Figure 11-6. The red/green status
LED is green if the module is functional and red if
the module is non-functional. The remaining two
LEDs, which are both red, work as follows:
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.
Figure 11–7. Four-Fiber Hot Standby Optical
Transceiver Module Status Indicators – Four-
Fiber Auxiliary Board.
11.4.1.4 Four-Fiber Auxiliary Board Status
Indicators
The four-fiber hot standby auxiliary module has
an additional six LEDs, as shown in Figure 11-7.
Beginning at the top left, they work as follows:
HSBOK-C – (Hot standby okay on C) This green
LED, when lit, indicates that the receiver portion
of transceiver C is operational and available for
hot standby, and a receiver signal is present.
SWTCH-C – (Switched to C) This red LED,
when lit, indicates that the signal normally on
transceiver B has been switched to the C trans-
ceiver.
LSIG-C – (Low signal on C) This red LED, when
lit, indicates that the signal level received on
transceiver C is too low or non-existent.
LSIG-D – (Low signal on D) This red LED, when
lit, indicates that the signal level received on
transceiver D is too low or non-existent.
HSBOK-D – (Hot standby okay on D) This green
LED, when lit, indicates that the receiver portion
of transceiver D is operational and available for
hot standby, and a receiver signal is present.
SWTCH-D – (Switched to D) This red LED,
when lit, indicates that the signal normally on
transceiver A has been switched to the D trans-
ceiver.
COMPONENT
SIDE
SOLDER SIDE
LSIG–BLSIG–A
STATUS LED
INJECT/EJECT
LEVER