DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
LED Interpretation
7-3Circuit Pack LEDs
7
Circuit Pack LEDs
Each circuit pack typically has three LEDs on the front panel visible at the front of
the carrier, there are some exceptions to this (for example DS1CONV circuit
pack) that are covered later in this section. On most circuit packs, the LEDs
indicate the following when lit. Exceptions to these indications are explained in
subsequent sections.
LED Alarms without Alarm Log Entry or with
Error Type 1
Whenever the system or a part of the system is reset, all affected circuit packs
will briefly light their red and green LEDs as they are initialized. Upon power-up of
a newly installed system, several alarm indicators may remain lit until the circuit
packs are administered. These alarms should be ignored until administration is
completed.
During routine or demand testing of Mass Storage System components, the red,
green and yellow LEDs on the MSSNET, TAPE, and DISK circuit packs all light
temporarily. This is normal and does not indicate a problem.
After a circuit pack has been initialized, a lit red LED should be accompanied by
an alarm in the Alarm Log. A single fault can sometimes light alarm LEDs on
several circuit packs, as in the following examples.
■ A TDM bus problem may cause several port circuit packs to display red
LEDS.
■ An EPN Maintenance circuit pack can prevent an Expansion Interface
circuit pack from initializing.
■ Extensive interactions in the Center Stage Switch can cause multiple
alarms from single faults in DS1C, SNI and SNC circuit packs and fiber
links.
■ Tone/clock problems may cause other circuit packs to report alarms.
Red Alarm The system has detected a fault in this circuit pack.
The Alarm Log should contain an on-board alarm for
this circuit pack or one of the maintenance objects
associated with it. The red LED is also lit briefly when a
circuit pack is inserted or reset. If the circuit pack
passes its initialization tests, the LED is extinguished. If
a fault is detected, it remains lit.
Green Testing The system is currently running tests on this circuit
pack as part of background maintenance or demand
testing. This LED is also lit briefly during initialization
tests when a circuit pack is inserted or reset.
Yellow Busy The circuit pack is currently in use by the system.
