363-206-295
Operations Interfaces
6-12 Issue 1 December 1997
Equipment Indicators 6
FAULT Indicators 6
Red FAULT indicators are provided on all circuit packs. Retainer cards and the
BBF5 JMPR circuit pack do not have LEDs. The circuit pack FAULT indicator is lit
whenever a failure has been isolated to that pack.
Common failures (for example, power, synchronization, control, etc.) do not cause
the FAULT indicators on all circuit packs affected by the failure to be lit; only the
FAULT indicator on the failed pack is lit.
FAULT indicators on high- and low-speed transmission interface and timing circuit
packs are flashed when a failure of the incoming signal is detected (for example,
LOS, LOF, LOP, or crossing of the signal fail or signal degrade threshold).
The FAULT LED on the BBG9 OHCTL blinks when a failure of the DCC from a far-
end shelf is detected.
ACTIVE Indicators 6
A green ACTIVE indicator is provided on each 1x1, 0x1, and 1+1 protected circuit
pack. It indicates which circuit packs, "service" and/or "protection," are active
(carrying service) at any given time.
Although there is no ACTIVE LED on each low-speed circuit pack to indicate it is
carrying service, the status of the circuit packs can normally be determined
without the CIT. If a service DS1 circuit pack FAULT LED is lit and the DS1
protection circuit pack FAULT LED is not lit, then the protection circuit pack is
carrying service and the failed circuit pack can be removed. The exception to this
rule is if a manual protection switch has been executed. In this case, the ABN LED
on the user panel will be lit and the user will have to use a CIT to check the status
of the system.
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