Circuit Pack Descriptions
Issue 8.0 July 2002
7-87
Faceplate LED 7
The OC48 RCVR A/D circuit pack has a red FAULT LED on its faceplate
(Figure 7-26).
Figure 7-26. OC48 RCVR A/D (839B2, 839B4B, 839B5, and 839E5)
Circuit Pack
The red FAULT LED is continuously lighted when a circuit pack failure is detected
or when the circuit pack loses power. If the circuit pack loses power, a separate
path is provided for power from the Line Controller (LNCTL) circuit pack to light
the FAULT LED on the OC48 RCVR A/D circuit pack.
The board controller on the OC48 RCVR A/D circuit pack detects hardware and
software faults on the circuit pack. When a fault occurs, the board controller is
FAULT
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839B4
RCVR
Optical
Connector
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