Ntbk50 Faceplate Leds - Nortel Communication Server 1000E Maintenance Manual

Table 11
NTAK79 LEDs
LED State
OOS On (Red)
Off
ACT On (Green)
Off
RED On (Red)
Off
YEL On (Yellow)
Off
LBK On (Green)
Off
CC On (Red)
On (Green)
Flashing (Green)
Off
DCH On (Red)
On (Green)
Off

NTBK50 faceplate LEDs

The NTBK50 circuit card has a total of seven faceplate LEDs. Five of the
LEDs are directly associated with the operation of the PRI. The remaining
two LEDs are associated with the Clock Controller and DCHI/DDCH
daughterboard.
Definition
The NTAK79 2 Mb PRI circuit card is either disabled or
out-of-service state.
The NTAK79 2 Mb PRI is not in disabled state.
The NTAK79 2 Mb PRI circuit card is in active state.
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).
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).
No yellow (remote) alarm.
The NTAK79 2 Mb PRI is in loopback mode.
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.
The clock controller is switched off.
The DCHI is equipped and disabled.
The DCHI is equipped and enabled, but not necessarily
established.
The DCHI is switched off.
Nortel Communication Server 1000
Communication Server 1000E Maintenance
NN43041-700 04.01 4 June 2010
Copyright © 2004-2010 Nortel Networks. All Rights Reserved.
Circuit card features 49