Table B-6. Uvg Mode: Loop Start Provisioning On T-Span - ADTRAN FXS+ User Manual

Appendix B. Signalling States
B-6

Table B-6. UVG Mode: Loop Start Provisioning on T-Span

FXS+2W RX A
Input
(Outgoing call from FXS)
Loop Open X
Loop X
Closed
Loop 1/0
Closed
(Incoming call to FXS+)
Loop Open 0
Loop Open 0
Loop 0
Closed
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
RX B TX A TX B
1/0 0 0
1/0 1 0
1/0 1 0
1/0 0 0
1/0 0 0
1/0 1 0
Means
logic 0 is the DS-1 stream
logic 1 is the DS-1 stream
logic 1 followed by logic 0 in each
successive signalling frame
value is not significant
phone on-hook
FXS+2W
Output
No Ringing
(Idle)
No Ringing
Reverse
Battery
No Ringing
(Idle)
Ringing
No Ringing
61202300L1-1