NEC UNIVERGE SV8300 System Maintenance Manual page 118

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