We have been looking into purchasing an Obi110. What we need to be able to do is support 6 phones or so over our house wiring (over 100 feet of cable), on the FXS port. Can the Obi support this many phones? I know it should be possible as rental units from the cable co. have been able to do this for us.
The other question is can we configure the Obi to route all calls from the phone port, FXS port, to the PTSN port, the FXO port. What about routing a small block of numbers dialed on the FXS port to an Asterisk server, and sending all other calls out on the FXO? Could it also be possible in such routing to automatically prepend an area code to 7 digit numbers dialed on the phone port, before they are sent out on the PSTN port.
Later on, if I decided to, could both the FXO and FXS ports be configured to connect independantly to Asterisk servers, so that all incoming calls on the FXO would go to Asterisk via SIP, and all outgoing calls on FXS should go to Asterisk.