NEC UNIVERGE SV8300 System Maintenance Manual page 111

A
Dial Tone is not returned from dis-
tant office.
In case of COT blade
In case of ODT blade
B
CHECK (1) Disconnect the trunk from the line on the
MDF.
(2) Connect a test telephone set to the C.O. line
(distant office side) on the MDF.
SW
TRUNK
(3) If Dial Tone is returned by going off-hook
on the test telephone set, check for trouble
with wiring on the MDF and the trunk
blade.
(4) If not, there is a problem with the distant
office or the C.O. line.
REPLACE
(1) Trunk blade.
CHECK (1) Disconnect the trunk from the line on the
MDF.
(2) To perform a Loopback Test, make a back
to back connection of the trunk blade and
another trunk within the system at the
MDF.
NOTE:
2-43
Chapter 2 TROUBLESHOOTING
FAULT INFORMATION DISPLAY
MDF
To Distant Office
Test Telephone Set
This test only works when the
trunks are assigned for type V
operation.
NWA-033627-001 Rev.4.0
95ch2001.fm