Nortel Communication Server 1000E Maintenance Manual page 98

98 Clearing faults
If the fault does not clear, manual continuity tests can be used to isolate
faults to peripheral equipment, such as E&M or Universal Trunk circuit
cards. See Software Input/Output Reference – MaintenanceNN43001-711
for details on performing the tests in LD 30.
Trunk connections from the main frame to the trunk cards can be checked
with a butt telephone or test telephone. Check the trunk wiring at the entry
point for dial tone and progress toward the Media Gateway.
Constantly observe and look up system messages as you replace
equipment.
You may need to replace:
•
E&M Trunk circuit card: NT8D15
•
Universal Trunk circuit card: NT8D14
•
any other trunk circuit card
•
NTAK03 TDS/DTR circuit card
•
trunk equipment (such as music source or paging equipment)
Table 35 "Trunk cannot make or receive calls(OVD message may be
received)" (page 98)
faults in an MG 1000E.
Table 35
Trunk cannot make or receive calls
(OVD message may be received)
Possible cause
Excessive traffic in the
system
Defective trunk circuit
card
provides additional instructions for isolating trunk
Action
Additional trunk circuit cards may be required to handle the traffic in the
system.
If the indicated circuit card is an E&M or Universal Trunk circuit card,
hardware-disable it and then reenable to initiate a self-test.
If the test fails, replace the circuit card. If the test passes, disconnect the
wiring between the circuit card and the cross-connect terminal.
Nortel Communication Server 1000
Communication Server 1000E Maintenance
NN43041-700 04.01 4 June 2010
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