Ntak79 Faceplate Leds - Nortel Meridian 1 Option 11C Manual

Page 98 of 126 PRI Maintenance

NTAK79 Faceplate LEDs

553-3011-315 Standard 13.00
Alarm threshold recommendations for digital trunks
If a digital trunk is present in an IP Expansion cabinet, link outages due to data
network performance degradation between main cabinet and expansion
cabinet will cause alarms on the far end of the digital trunk. If link outages are
frequent, alarm thresholds on the far end may need to be increased to prevent
the trunk from being placed in a state requiring manual intervention to
recover.
The NTAK79 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 on-board Clock
Controller and the on-board D-channel interface (DCHI). Refer to Table 27.
Table 27
NTAK79 faceplate LEDs (Part 1 of 2)
LED State
OOS On (Red)
Off
ACT On (Green)
Off
RED On (Red)
Red Off
YEL On (Yellow)
Off
January 2002
Definition
The NTAK79 2.0 Mb PRI circuit card is
either disabled or out-of-service.
The NTAK79 2.0 Mb PRI is not in a
disabled state.
The NTAK79 2.0 Mb PRI circuit card is in
an active state.
The NTAK79 2.0 Mb PRI is in a 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 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.