User manual

Appendix B. Signaling States Vs. Mode of Operation
32 FXS+ Dual Voice Option Module 61200.080L1-1
Table B-D
FXS+ Mode (Ground Start)
FXS+ FXS+
2W Input RX A RX B TX A TX B 2W Output
(Outgoing call from FXS+)
No Ring Gnd
or
Loop Open 1 1 0 1 Idle
Ring Gnd 1 1 0 0 No Tip Gnd
Ring Gnd
or
Loop Closed 0 1 1 1 Tip Gnd
Loop Open 0 0 0 1 Tip Gnd & No Ringing
Loop Closed 0 0 1 1 Tip Gnd & Ringing
( Incoming call to FXS+)
(IDLE) 1 X - - No Tip Gnd & No Ringing
0 1 - - Tip Gnd & No Ringing
Loop Open 0 0 0 1 Tip Gnd & Ringing
Loop Closed 0 0 1 1 Tip Gnd & 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 = phone on-hook
Loop Closed = phone off-hook