User's Manual

NDA-24300 CHAPTER 5
Page 313
Issue 1
FAULT REPAIR PROCEDURES
1.3 Line Fault - When Dial Tone (DT) Cannot Be Heard
Note:
If a circuit card is replaced because only one line is
faulty, no other lines in that circuit card can be used
until the replacement is complete.
When OPE lamp on the LC circuit card
does not illuminate
Confirm MB switch of the LC circuit card is in
ON position (UP).
Use ASDT command to confirm that station
data in the LC circuit card is assigned.
Replace the LC circuit card with a spare.
When BL lamp for each line is flashing or
illuminating on the LC circuit card
Confirm MB switch of the LC circuit card is in
ON position (UP side).
Use MBST command to confirm LC circuit
card has not been placed into make-busy state.
Use ASDT command to check the station data
assignment.
Replace the LC circuit card with a spare.
ATTENTION
Contents
Static Sensitive
Handling
Precautions Required
START
A