Table B-7. Uvg Mode: Ground Start Provisioning On T-Span - ADTRAN FXS+ Quad User Manual

Appendix B. Signalling States
61200300L1-1

Table B-7. UVG Mode: Ground Start Provisioning on T-Span

FXS+
2W Input RX A RX B TX A TX B
(Outgoing call from FXS+)
Loop Open 0
Ring Ground 0
Loop Closed 0
Loop Closed 1/0
(Incoming call to FXS+)
Ground Start 0
Loop Open 1
Loop Open 0
Loop Closed 0
The A and B signal bit states on the DS-1 signal are as
follows:
Signal
0
1
1/0
X
Loop Open
Loop Closed
FXS+ Quad and Dual Voice Option Module User Manual
0 0 0
0 0 1
1/0 1 0
1/0 1 0
0 0 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 succes-
sive signalling frame
value is not significant
phone on-hook
phone off-hook
FXS+
2W Output
No Ringing (Ground Start)
No Tip Ground
Tip Ground
Reverse Battery
No Ringing
Tip Ground & Ringing
Tip Ground & No Ringing
Tip Ground & No Ringing
B-7