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3. T-Line and R-Line are shorted or mixed up.
Symptom
3-1
3-2
3-3
A can not dial.
Conversation is impossible between stations.
When B dials A , noise will be heard at B
immediately after the calling tone.
LMU Lamps
Brighter than normal.
4. T-Line and R-Line are connected conversely.
Sympton:
4-1
4-2
4-3
A can not make dialing.
Conversation is impossible between stations.
When B dials A , noise will be heard at B .
LMU Lamps
Brighter than normal.
Shorted or mixed up
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