Clearing Mg 1000T Faults - Nortel 1000E Maintenance Manual

Condition
System message indicates
conference loop is
defective.
Defective conference loop
with no system message

Clearing MG 1000T faults

The MG 1000T platform provides the interface between network switching
and digital trunks. MG 1000T faults can disable network equipment.
An OVD message indicates a network loop is disabled and all connections
on the loop are disabled. The network loop number corresponds to a
specific card number in the MG 1000T. System messages can also indicate
that one or more cards are defective or disabled without producing an
OVD message. In either case, look up all system messages in Software
Input/Output Reference – System Messages (NN43001-712) and follow
the instructions given.
Manual continuity tests can be used to isolate faults. See LD 30 in Software
Input/Output Reference – Maintenance (NN43001-711) for details on
performing the tests.
Copyright © 2007, Nortel Networks
.
Possible cause
Defective SSC circuit card
Defective IP daughterboard
or SSC circuit card
Defective NTDK20 SSC
card
Nortel Communication Server 1000
Communication Server 1000E Maintenance
NN43041-700 01.02 Standard
Release 5.0 20 June 2007
Clearing MG 1000T faults 87
Action
If a fault is indicated on conference
loop, replace the NTDK20 SSC circuit
card.
Reuse the daughterboards and
security device installed on the
original NTDK20 SSC circuit card.
If there are no messages indicating
a fault on any conference loop, test
each conference loop in the system
by entering:
LD 38
CNFC loop ("loop" represents the
conference loop number)
If the conference loop is disabled, try
to enable it by entering:
LD 38
ENLL loop ("loop" represents the
conference loop number)
Install a new NTDK20 SSC circuit
card.
Reuse the daughterboards and
security device attached to the
original NTDK20 SSC circuit card.
If the card tests "OK", the NTDK20
SSC circuit card was defective.
If after a few minutes the problem
reoccurs, replace the Media Gateway.