How to do with analogue FXS ports unsing bayonne2?

One card such as OpenSwitch6 of voicetronix having FXS(station) ports
and the FXS port connect to a phone. Here is the flow:
1.Pick up the receiver of the phone, the FXS port will get callin event.
2.Dial the number of callee, the FXS port will get overlapped callin
event with a number of callee.
3.FXS answer the call.