Ntak79 Faceplate Leds - Nortel 1000E Maintenance Manual

Table 2
NTAK10 LEDs (Part 2 of 2)
LED
NEA
FEA
LBK
CC

NTAK79 Faceplate LEDs

State
On (Yellow)
Off
On (Yellow)
Off
On (Yellow)
Off
On (Red)
On (Green)
Flashing (Green)
Off
The NTAK79 2 Mbit PRI circuit card has a total of seven faceplate LEDs.
Five of the LEDs are directly associated with the operation of the Primary
Rate interface (PRI). The remaining two LEDs are associated with the
on-board Clock Controller and the on-board D-channel interface (DCHI).
Hardware maintenance tools
Definition
A near-end alarm state has been detected.
No near-end alarm.
A far-end alarm state has been detected.
No far-end alarm
The NTAK10 2 Mbit DTI is in loopback mode.
The NTAK10 2 Mbit DTI is not in loopback mode.
The clock controller is switched on and disabled.
The clock controller is switched on and is either
locked to a reference or is in free-run mode.
The clock controller is switched on and is attempting
to lock (tracking mode) to a reference. If the LED
flashes continuously over an extended period of time,
check the CC STAT in LD 60. If the CC is tracking,
this can be an acceptable state. Check for slips and
related clock controller error conditions. If none exist,
then this state is acceptable, and the flashing is
identifying jitter on the reference.
The clock controller is switched off.
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Maintenance