Avaya Definity SI Maintenance Manual page 248

LED Interpretation
2. Green (test)
3. Yellow (busy)
Packet circuit packs such as the TN556 ISDN BRI-Line and TN570
Expansion Interface perform extensive initialization tests and light both the
red and green LEDs during that testing.
During the various states of operation (start-up testing, normal operation,
circuit failure, and so forth) circuit pack status LED indications appear as
shown in
Table 7-1. Circuit Pack Status LEDs
Equipment
Type LED
Red
Green
Port Circuit
Packs
Yellow
7-8 Issue 4 May 2002
If the system seems to be functioning correctly, but the circuit pack
does not start communicating with the system, replace the circuit
pack.
—
the system is running tests on this circuit pack.
—
indicates that the circuit pack is in use.
NOTE:
A port circuit pack also lights its red LED when it performs
initialization tests (for example, when the circuit pack is initially
inserted into the system). If all initialization tests pass, the red LED is
turned off. If any initialization tests fail, the red LED remains lighted
and the circuit pack is not placed into service.
Table 7-1.
On briefly during power up, circuit pack reseating, resetting, and system
reset. Steadily on if circuit pack fails start-up test or fails while in use. Off
during normal operation.
Briefly on during circuit pack testing following power up, circuit pack
reseating, and system reset. On during periodic, scheduled, and system
technician demanded testing. Off during normal operation.
On when any port in the circuit pack is in use, otherwise, off.
The yellow LED on the TN771 Maintenance/Test circuit pack may blink.
This has special meaning for systems using Packet Bus. Refer to "Packet
Bus" for more information.
Description
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