User guide

Appendix A—Cable Pinouts
MultiVOIP® Voice/Fax over IP Gateways 145
Voice/Fax Channel Connectors
Pin Functions (E&M Interface)
Pin
Description
Function
1
M
Input
2
E
Output
3
T1
4-Wire Output
4
R
4-Wire Input, 2-Wire Input
5
T
4-Wire Input, 2-Wire Input
6
R1
4-Wire Output
7
SG
Signal Ground (Output)
8
SB
Signal Battery (Output)
Pin Functions (FXS/FXO Interface)
FXS Pin
Description
FXO Pin
Description
2
N/C
2
N/C
3
Ring
3
Tip
4
Tip
4
Ring
5
N/C
5
N/C