ADTRAN 1202300L1, Руководство пользователя

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Appendix B. Signalling States
61202300L1-1 FXS+ Quad Voice Option Module User Manual B-5
The A and B signal bit states on the DS-1 signal are as fol-
lows:
Table B-5. Single Mode
FXS+2W
Input
RX A RX B TX A TX B FXS+ 2W
Output
(Outgoing call from FXS+)
Loop Open X 1 0 0 No Ringing (Idle)
Loop Closed X 1 1 0 No Ringing
Loop Closed 1/0 1/0 1 0 Reverse Battery
(Incoming call to FXS+)
Loop Open X 1 0 0 No Ringing (Idle)
Loop Open X 1/0 0 0 Ringing
Loop Closed X 1 1 0 No Ringing
Signal Means
0 logic 0 is the DS-1 stream
1 logic 1 is the DS-1 stream
1/0 logic 1 followed by logic 0 in each
successive signalling frame
X value is not significant
Loop Open phone on-hook
Loop Closed phone off-hook