Nortel Networks Circuit Card 311 - Manual (Page 926)

926 NTAK79 2.0 Mb PRI card
Table 377
NTAK79 LEDs
LED State Definition
On (Red) The NTAK79 2MB PRI circuit card is either disabled or
out-of-service. OOS
Off The NTAK79 2MB PRI is not in a disabled state.
ACT On (Green) The NTAK79 2MB PRI circuit card is in an active state.
Off The NTAK79 2MB PRI is not in a disabled state. The OOS
LED turns red.
RED On (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 Multiframe (LMAS).
Off No red (local) alarm.
YEL On (Yellow) 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).
Off No yellow (remote) alarm.
LBK On (Green) 2MB PRI is in loop-back mode.
Off 2MB PRI is not in loop-back mode.
On (Red) The clock controller is switched on and disabled.
On (Green) The clock controller is switched on and is either locked to a
reference or is in free run mode.
CC
Flashing (Green) 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 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.
DCH On (Red) DCH is equipped and disabled.
On (Green) DCH is equipped and enabled, but not necessarily
established.
Off DCH is switched off.
The NTAK79 uses a standard 9.5" by 12.5" multi-layer printed circuit board.
The faceplate is 7/8" wide. The NTAK79 circuit card has a total of seven
faceplate LEDs. Five of the LEDs are directly associated with the operation
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Copyright © 2003-2008, Nortel Networks
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