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

Possible cause
Defective wiring
Defective backplane

Symptom:

Telephone cannot make or receive calls (no OVD message)

The telephone cannot make or receive calls. There is no OVD message or
other system message indicating the TN for this telephone is defective or
disabled. There may or may not be dial tone when the handset is unhooked.
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.
Constantly observe and look up system messages as you perform this
procedure.
Option 11C Compact
Chapter 25 — Fault locating and clearing
Action
Disable the TN. Disconnect the wiring between the telephone and
the cross-connect terminal.
Re-enable the TN and wait for an OVD message.
If you do not receive an OVD message, replace or repair the wiring
between the telephone and the cross-connect terminal.
If you do not receive an OVD message, replace or repair the wiring
between the telephone and the cross-connect terminal.
If there is still a telephone problem, reconnect all wiring and go to
the next possible cause.
Disable the TN. Unseat the affected PE circuit card.
Re-enable the TN and wait for an OVD message.
If you receive an OVD message, replace the cabinet.
Planning, Installation, Fault Clearing and CCBR Guide
Page 521 of 536