NEC UNIVERGE SV8300 System Maintenance Manual page 115

A
No Dial Tone Connection on Tie
Line Incoming Call (only for the
2nd dial tone system)
In case of ODT blade
B
CHECK (1) In case all Tie Line Trunks fail, check if
DTMF Receivers for Tie Line Incoming
Call are installed (only when the signal kind
of the trunk is DTMF).
CHECK (1) System Data Programming for the trunk:
CM35 Y=001, 009, 010
(2) Disconnect trunk from the line on the MDF.
(3) To perform a Loopback Test, make a back
to back connect of the trunk and another
trunk within the system at the MDF.
DT
~
(4) If Dial Tone is returned when the call is ter-
minated to the original trunk, there is a
problem with the distant office, the Carrier
Equipment, or the line.
(5) If not, check for trouble with wiring on the
MDF and the trunk blade.
REPLACE (1) Trunk blade
2-47
Chapter 2 TROUBLESHOOTING
FAULT INFORMATION DISPLAY
ODT
E
M
ODT
E
M
NWA-033627-001 Rev.4.0
NOVEMBER/21/2008
MDF
95ch2001.fm