User's Manual

NDA-24300 CHAPTER 5
Page 325
Issue 1
FAULT REPAIR PROCEDURES
2.4 Trunk (COT, TLT, DTI) Fault
Note 1:
If a circuit card is replaced because only one line
is faulty, any other lines in that circuit card cannot
be used until the replacement is complete.
Note 2:
If the polarities of the external line is reversed, it
is detected in the form of Trunk Ineffective Hold.
When OPE lamp on the trunk circuit card
does not illuminate
Confirm that MB switch of the trunk circuit
card is in ON position (UP side).
Confirm that trunk data (ATRK command) in
the trunk circuit card is assigned.
Replace trunk circuit card with a spare.
When BL lamp is flashing or illuminating
on the trunk circuit card
Confirm that MB switch of trunk circuit card
is in ON position (UP side).
Use MBTK command to confirm that trunk
circuit card has not been placed into make-
busy state.
Check trunk data (ATRK command)
assignment.
Replace trunk circuit card with a spare.
ATTENTION
Contents
Static Sensitive
Handling
Precautions Required
START
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