Table of Contents
Advertisement
FXS+2W Input
(Outgoing call from FXS+)
Loop Open
Loop Closed
Loop Closed
(Incoming call to FXS+)
Loop Open
Loop Closed
61202300L1-1
Tables B-3 through B-7 describe various modes for signal-
ling states.
RX A
RX B TX A TX B
X
1
X
1
X
1/0
X
0
X
0
The A and B signal bit states on the DS-1 signal are as fol-
lows:
Signal
0
1
1/0
X
Loop Open
Loop Closed phone off-hook
FXS+ Quad Voice Option Module User Manual
Appendix B. Signalling States
Table B-3. FXS+ Mode (Loop-Start)
0
1
No Ringing (Idle)
1
1
No Ringing
1
1
Reverse Battery
0
1
Ringing
1
1
No Ringing
Means
logic 0 is the DS-1 stream
logic 1 is the DS-1 stream
logic 1 followed by a logic 0 in each
successive signalling frame.
value is not significant
phone on-hook
FXS+2W Output
B-3
Advertisement
Table of Contents
