ADTRAN 1200103L2, Руководство пользователя

Страница: 40 / 43

Appendix C. Signaling States
61200.103L2-1 FXO+ Dual Voice Option Module User Manual
29
Appendix C
Signaling States
SIGNALING STATES VERSUS MODE OF OPERATION
The three tables in this appendix describe the signal-
ing states for the FXO card and the DS-1 PCM stream.
Table C-A
FXO+ Loop Start Mode
FXO+ FXO+
2W OUTPUT RXA RXB TXA TXB 2W Output
Outgoing call from 2W port
Loop Open 0 X 0 1 No ringing (idle)
Loop Open 0 X 0 0 Ringing
Loop Closed 1 X 0 1 No ringing
Incoming call to 2W port
Loop Open 0 X 0 1 No ringing (idle)
Loop Closed 1 X 0 1 No ringing
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