Symptom; Trunk Cannot Make Or Receive Calls (No Ovd Message) - Nortel Meridian 1 Planning, Installation And Operating Instructions

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Symptom:

Trunk cannot make or receive calls (no OVD message)

553-3121-210 Standard 3.0
Chapter 25 — Fault locating and clearing
You cannot make or receive calls over a trunk, but there is no overload (OVD)
or other system message showing the TN for this trunk is defective or has
been disabled. Look up all system messages in the Option 11C Compact
software guide and follow the instructions given. If the fault does not clear,
use this procedure.
Manual continuity can be used to isolate faults to Peripheral Equipment. See
"LD 30" in the Option 11C Compact software guide for details on performing
the tests.
Trunk connections from the main frame to the Peripheral Equipment can be
checked with a butt-in set or test set. Check the trunk wiring at the entry point
for dial tone and progress toward the PE.
Constantly observe and look up system messages as you perform this
procedure.
You may need to replace:
• Trunk circuit card: NTMW07
• NTMW01 SSC card
• Trunk equipment (such as music source or paging equipment)
January 1999