Chapter 2 TROUBLESHOOTING
2-50 NWA-033627-001 Rev.4.0
95ch2001.fm
FAULT INFORMATION DISPLAY
Call is dropped (This condition
excludes the Line Fault detected
within a system).
When the station user
flashes the switch-hook.
(1) System Data Programming for the trunk:
CM35 Y=016
The failure occurs suddenly. (1)
(2)
(3)
(4)
Disconnect the trunk from the line on the
MDF.
Connect a test telephone set to the line on
the MDF, and check if the failure reoccurs.
If the failure recurs, there is a problem with
the distant office.
If not, replace the trunk blade.
(1)
(2)
Trunk blade
CPU blade
Transmission quality is not accept-
able.
Noise/Distortion (1) Cabling between the PBX and the MDF or
between the MDF and the lines is properly
run to avoid induction from an AC Power
Cable, motor or power supply equipment.
(1)
(2)
Trunk blade
CPU blade
Low Voice Level (1) Loose connection of cables on the MDF.
(1)
(2)
Trunk blade
CPU blade
Cross Talk (1) Wiring on the MDF is properly.
(1)
(2)
Trunk blade
CPU blade
A
CHECK
CHECK
REPLACE
CHECK
REPLACE
CHECK
REPLACE
CHECK
REPLACE
END
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