Pri Fault Clearing; Contents; Pri Red Alarm (Local Alarm) - Nortel Communication Server 1000 Maintenance Manual

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PRI fault clearing

Contents

This section contains information on the following topics:
"PRI Red alarm (local alarm)" (page 15)
"PRI Yellow alarm (remote alarm)" (page 17)
"PRI problems" (page 18)
"D-channel problems" (page 19)

PRI Red alarm (local alarm)

A PRI local alarm can indicate:
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•
Under any of these alarm conditions, all 24/30 B-channels are taken out
of service, and:
1.
2.
3.
4.
5.
System software checks every 0-15 minutes (programmable) to see if a
clock-controller or reference-clock error has occurred.
Copyright © 2003-2009 Nortel Networks
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1.5 Mb/2.0 Mb digital transmission problems
a PRI card fault
The PRI local alarm faceplate LED is lit.
Calls on the PRI are disconnected automatically.
All 24/30 B-channels are disabled.
After a pause of 2.5 seconds, the PRI sends a remote-alarm indication
to the far-end switch.
The appropriate Digital Trunk Diagnostic (DTA) message is printed,
and a minor alarm is raised on all attendant consoles within the same
customer group.
Nortel Communication Server 1000
ISDN Primary Rate Interface Maintenance
NN43001-717 03.01
11 May 2009
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