Appendix A – Cable Pin-Outs
144 MultiVOIP® Voice/Fax over IP Gateways
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
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