Ntak79 Faceplate Leds - Nortel 1000E Maintenance Manual

46 Hardware maintenance tools

NTAK79 faceplate LEDs

The NTAK79 2 Mb 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 onboard
Clock Controller and the onboard D-channel interface (DCHI).
The NTAK79 faceplate LEDs are described in
(page
Table 10
NTAK79 LEDs
LED
State
OOS On (Red)
ACT On (Green)
RED On (Red)
YEL On (Yellow)
LBK On (Green)
CC On (Red)
On (Green)
Flashing (Green)
Copyright © 2007, Nortel Networks
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46).
Definition
The NTAK79 2 Mb PRI circuit card is either disabled or
out-of-service state.
Off The NTAK79 2 Mb PRI is not in disabled state.
The NTAK79 2 Mb PRI circuit card is in active state.
Off NTAK79 2 Mb PRI is not in disabled state. The OOS LED is red.
A red alarm state has been detected. This represents a local
alarm state of:
Loss of Carrier (LOS)
Loss of Frame (LFAS), or
Loss of CRC Multi-frame (LMAS).
Off No red (local) alarm.
A yellow-alarm state has been detected. This represents a
remote alarm indication from the far end. The alarm can be
either Alarm Indication (AIS) or Remote Alarm (RAI).
Off No yellow (remote) alarm.
The NTAK79 2 Mb PRI is in loopback mode.
Off The NTAK79 2 Mb PRI 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,
this state is acceptable, and the flashing identifies jitter on the
reference.
Off The clock controller is switched off.
Nortel Communication Server 1000
Communication Server 1000E Maintenance
NN43041-700 01.02 Standard
Release 5.0 20 June 2007
Table 10 "NTAK79 LEDs"