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LED
State
RED
On (Red)
Off
YEL
On (Yellow)
Off
LBK
On (Green)
Off
On (Red)
CC
On (Green)
Flashing
(Green)
Off
DCH
On (Red)
On (Green)
Off
The NTBK50 uses a standard 9.5" by 12.5" multi-layer printed circuit
board. The faceplate is 7/8" wide and contains seven LEDs. The LEDs are
described in
Table 404
NTBK50 faceplate LEDs
LED
State
OOS
On (Red)
Off
On (Green)
ACT
Off
Copyright © 2003-2008, Nortel Networks
.
Definition
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
Multiframe (LMAS).
No red (local) alarm.
A yellow alarm state has been detected. This represents a remote
alarm indication from the far end. The alarm may be either Alarm
Indication (AIS) or Remote Alarm (RAI).
No yellow (remote) alarm.
2.0 Mb PRI is in loop-back mode.
2.0 Mb PRI is not in loop-back 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
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 LD60. If the CC is tracking this may
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 not equipped.
DCH is disabled.
DCH is enabled, but not necessarily established.
DCH is not equipped.
Table 403 "NTBK50 faceplate LEDs" (page
Definition
The NTBK50 2.0 Mb PRI circuit card is disabled or out-of-service.
Also, the state of the card after power-up, completion of self test, and
exiting remote loopback.
The NTBK50 2.0 Mb PRI is not in a disabled state.
The NTBK50 2.0 Mb PRI circuit card is in an active state.
The NTBK50 2.0 Mb PRI is in a disabled state. The OOS LED is red.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Physical description 971
970).
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