Pin occupancy (wireing) at the FXO's


Hi, we have a UCM6102, with our two FXOs there is no input signal.
How does the pin assignment look at the FXO’s connections?
Here is a Vodafone PlusBox 340 to connect.
The plusBox has the following pin assignment to the PBX:
Pin1-Receive A (+) incoming
Pin2-TransmitA (+) outgoing
Pin3 Transmit B (-) outgoing
Pin4-Receive B (-) incoming

Thanks for the support


It is a standard USOC rj11 4 pin connector and supports pins 2&3 as the single line input. It will always be the middle two pins.