Planet Technology Internet Telephony PBX System IPX-1900 - Manual (Page 81)

FXO Port Pin Assignments
The FXO Telephony Interface has 2 RJ-11C/W modular jacks. The following diagram and
table show the assignments of the pin for the R-J11 port.
81
RJ-11pin Signal
1
2 Tip
3 Ring
4
1 2 3 4
FXS Port Pin Assignments
The FXS Telephony Interface has 4 RJ-11C/W modular jacks. The following diagram and
table show the assignments of the pin for the RJ-11 port.
RJ-11 pin Signal
1 Not connected
2 Tip
3 Ring
4 Not connected
1 2 3 4