Ntbk50 Faceplate Leds - Nortel 1000E Maintenance Manual

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.
The NTBK50 2 Mb PRI circuit card LEDs are described in
"NTBK50 faceplate LEDs" (page
Table 11
NTBK50 faceplate 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)
CC Flashing
(Green)
Off
DCH On (Red)
On (Green)
Off
Definition
The NTBK50 2 Mb PRI circuit card is either disabled or
out-of-service. Also, the state of the card after power-up,
completion of self-test, and exiting remote loopback.
The NTBK50 2 Mb PRI is not in disabled state.
The NTBK50 2 Mb PRI circuit card is in active state.
The NTBK50 2 Mb PRI is 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 NTBK50 2 Mb PRI is in loopback mode.
The NTBK50 2 Mb PRI is not in loopback mode.
The clock controller is software-disabled.
The clock controller is enabled and is either locked to a reference
or is in free-run mode.
The NTAK20 is equipped 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 not equipped.
The DCH is disabled.
The DCH is enabled, but not necessarily established.
The DCH is not equipped.
Nortel Communication Server 1000
Communication Server 1000E Maintenance
NN43041-700 02.07 22 December 2009
Copyright © 2004-2009 Nortel Networks. All Rights Reserved.
Circuit card features 45
45).
Table 11