Symptom; Trunk Cannot Make Or Receive Calls (Ovd Message Received) - Nortel Meridian 1 Planning, Installation And Operating Instructions

Symptom:

Trunk cannot make or receive calls (OVD message received)

You cannot make or receive calls over a trunk and an overload (OVD) system
message is received. The message indicates only this trunk 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 tests 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.
Constantly observe and look up system messages as you perform this
procedure.
You may need to replace:
• Universal Trunk circuit card: NTMW07
• NTMW01 SSC card
• Trunk equipment (such as music source or paging equipment)
Option 11C Compact
Chapter 25 — Fault locating and clearing
Planning, Installation, Fault Clearing and CCBR Guide
Page 505 of 536