C • Port pin-outs Model 4520 & 4110 Series Getting Started Guide
78 FXO port
FXO port
The FXO ports use an RJ-11 connector with 6 positions. The midle two positions 3 and 4 are used according
to table 13.
Note Pins not listed are not used.
Table 13. RJ-11 socket
Pin Signal
3 Ring (-)
4 Tip (+)
