Disabled Loop Indicated By Ovd Message (Nt7R51 Local Carrier Interface Card) - Nortel Meridian 1 Manual

Symptom:
Disabled loop indicated by OVD message
(NT7R51 Local Carrier Interface Card)
An overload (OVD) system message indicates that a loop on an NT7R51
Local Carrier Interface Card is disabled. All terminal connections on the loop
are disabled. A red LED on the card may be lit or flashing. Look up all system
messages and maintenance display codes in the X11 system messages guide
and follow the instructions given. If the fault does not clear, use this
procedure.
Manual continuity tests can be used to isolate superloop network card and IPE
faults. See "LD 45" in the X11 input/output guide for details on performing
the tests.
Replace equipment as described in Meridian 1 hardware replacement
(553-3001-520). You may need to replace one of the following:
— Remote Carrier Interface card: NT7R52
— Local Carrier Interface card: NT7R51
— IPE card
— Cable between superloop network card and controller card
Possible cause
Defective Local
Carrier Interface
card
Clearing network equipment faults
Note: Continually observe and look up system messages as you perform
this procedure.
Action
Hardware disable, then reenable, the superloop network card to initiate a
self-test. If the test fails, replace the card. If the test passes, follow the
procedure below.
Check the status of the Local Carrier Interface card:
LD 32
STAT sl "sl" represents the loop number.
Check the display and take steps to resolve the problem indicated is the
status report.
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Meridian 1 Fault clearing