Nortel Passport 4400 Series Hardware Installation Manual page 114

Passport 4400 Hardware Installation Manual
Indicator Function
AT System Status
1A E1 Line 1
interface alarm
status
1T E1 Line 1
interface test
status
2A, 2T, D1 Reserved for
and D2 future use
11-4
Table 11-5. E1 Operational States
State Status
Off Initialization mode – see Table 11-4.
Green Operational mode – see Table 11-4.
Flashing green Download active.
Off Interface not active.
Flashing red IFAS (Frame Alignment Signal) loss.
Flashing amber FAS distant alarm.
Fast flashing TS16 AIS (Time Slot 16 Alarm Indication Signal).
green
Green Interface operational.
Fast flashing red CRC4 loss or MFAS loss.
Flashing green AIS (Alarm Indication Signal).
Fast flashing MFAS distant alarm.
amber
Red Line loopback test in progress – 1A shows test
status.
Flashing red Channel loopback or pattern test in progress.
Off No test.
Indicators