NEC NEAX 2000 IVS2 Maintenance Manual page 140

CHAPTER 2 TROUBLESHOOTING
Fault Diagnosis and Troubleshooting
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.
B
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(3) If the trouble remains, replace the
trunk card.
(4) If not, there is a problem with the
distant office.
(1) Trunk card
REPLACE
(2) FP card
(3) MP card
(1) System Data Programming for the
CHECK
trunk: CM35 YY=16
(1) Disconnect the trunk from the line
CHECK
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 card.
(1) Trunk card
REPLACE
(2) FP card
(3) MP card
2
NEAX2000 IVS Maintenance Manual
ND-70926 (E), Issue 3.0