Table C-Afxo+ Loop Start Mode; Table C-B Fxo+ Ground Start Mode - ADTRAN FXO+ DUAL VOICE User Manual

SIGNALING STATES VERSUS MODE OF OPERATION
FXO+
2W OUTPUT
Outgoing call from 2W port
Loop Open
Loop Open
Loop Closed
Incoming call to 2W port
Loop Open
Loop Closed
61200.103L2-1
The three tables in this appendix describe the signal-
ing states for the FXO card and the DS-1 PCM stream.
RXA
0
0
1
0
1
The A and B signal bit states on the DS-1 signal are as
follows:
0 = logic 0 is the DS-1 stream
1 = logic 1 is the DS-1 stream
X = value is not significant
Loop Open = telephone on-hook
Loop Closed = telephone off-hook
FXO+ Dual Voice Option Module User Manual
Appendix C. Signaling States
Appendix C
Signaling States
FXO+ Loop Start Mode
RXB TXA TXB
X 0 1
X 0 0
X 0 1
X 0 1
X 0 1
Table C-A
FXO+
2W Output
No ringing (idle)
Ringing
No ringing
No ringing (idle)
No ringing
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