Table of Contents
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CN20
Pin No.
Signal Name
3
L2(T)
4
L1(R)
CN21
Pin No.
Signal Name
3
T1
4
T2
CN25
Refer to FCB PCB CN8.
Destination
Telephone Line
Telephone Line
Destination
External Telephone
External Telephone
Maintenance, Adjustments and Checkpoints
Signal Waveform
Line Signal
Line Signal
Signal Waveform
Line Signal for the External Telephone
Line Signal for the External Telephone
Function
Function
3–37
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Table of Contents
Troubleshooting
