CHAPTER 2 TROUBLESHOOTING
– 209 – NWA-008847-001 Rev.3.0
a6ch2001.fm
Station Line Fault
(1) At Calling Station
Side Tone cannot be heard. (1) On the MDF, connect a test telephone
set to the faulty station line.
(2) If Side Tone can be heard, check for
trouble with the cabling and telephone
set.
(3) If no Side Tone, check for trouble with
wiring on the MDF and LC card.
(1) LC card
(2) Telephone set
Dial Tone is not returned.
The station telephone set is
DTMF type.
(1) System Data Programming for DTMF
Receiver: CM10/CM14, CM45 Y=0
NOTE: Addition of an RST requires a
system reset.
(2) System Data Programming for the
station: CM10/CM14, CM12 Y=00
System does not receive
any digits dialed by the
station.
(1) MB switch on the FP card is set
downward.
(2) “RUN” lamp on the FP or MP card is
flashing.
(1) FP card
(2) MP card
START
A
CHECK
REPLACE
CHECK
CHECK
REPLACE
FAULT DIAGNOSIS AND TROUBLESHOOTING
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