I’ve never configured Asterisk to work with analog lines, I’ve always configured PRI lines.
I have an Asterisk server which act as an IVR. It will be connected to another PBX trough a digital to analog converter, like this:
TELCO -------> OTHER PBX ------> digital to analog converter -------> IVR
Now, the IVR should be able to receive 4 simultaneous calls coming from outside and it should also be able to place 4 outgoing calls to the external line.
In addition, it should be able to receive faxes via 2 dedicated lines and redirect them to a Hylafax server.
My problem is that I’m a little bit confused on FXO and FXS.
Which card should I purchase? And with which configuration of FXO/FXS ports?