NEC NEAX 2000 IVS2 Maintenance Manual page 136

CHAPTER 2 TROUBLESHOOTING
Fault Diagnosis and Troubleshooting
(2) On Incoming Call
START
C.O. Incoming Call is not
terminated to ATTCON Station,
DIT or TAS Buzzer.
"BL" Lamp on the trunk
card is not turned on.
The "BL" Lamp is
turned on.
A
Page 128
(1) Disconnect the trunk from the line
CHECK
on the MDF.
(2) Connect a test telephone set to the
line on the MDF.
TRUNK
ATTCON
(3) If the telephone rings, check for
trouble with wiring on the MDF and
the trunk card.
(4) If not, there is a problem with the
distant office or the line.
(1) Trunk card
REPLACE
(1) System Data Programming for the
CHECK
trunk
• In case of Termination to DIT
station: CM30 YY=02, 03, 04, 05,
13, 14, 17, CM35 YY=09
• In case of Termination to TAS
Buzzer: CM30 YY=02, 03
MDF
TO C.O. LINE
TEST TELEPHONE SET
2
NEAX2000 IVS Maintenance Manual
ND-70926 (E), Issue 3.0