NEC NEAX 2000 IVS2 Maintenance Manual page 137

A
No Dial Tone Connection on
Tie Line Incoming Call (only for
the 2nd dial tone system)
In case of ODT card
B
2
NEAX2000 IVS Maintenance Manual
ND-70926 (E), Issue 3.0
CHAPTER 2 TROUBLESHOOTING
(1) In case all Tie Line Trunks fail, check
CHECK
if DTMF Receivers for Tie Line
Incoming Call are installed (only
when the signal kind of the trunk is
DTMF).
(1) System Data Programming for the
CHECK
trunk: CM35 YY=00, 09, 10
(2) Disconnect trunk from the line on
the MDF.
(3) To perform a Loop Back 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 terminated 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 card.
(1) Trunk card
REPLACE
Fault Diagnosis and Troubleshooting
MDF
ODT
E
M
ODT
E
M
Page 129