Can anyone recommend a solution for the following:
I need to be able to pick up a phone at Location B and get a dialtone from a POTS line located at Location A
Both locations have broadband. Location A has a cable modem and Location B has a T1 connection.
Both locations are behind a firewall and or NAT, but I have full control over the firewall at A (but no control at all at B, I assume it will pass most anything going out that originates inside the firewall, so far I've found no protocols it will not pass).
Location B does not need to be able to receive calls, only originate calls, the calls must be made from the phone line at A (ANI has to match A's number).
It needs to allow a modem connection across the link. Its probably
2400bps, but I have no way to be sure.
My other requirement is that it needs to be really cheap. My first thought was Asterisk with a FXO card at A and some sort of FXS device at B (maybe an iAXy or similar). Asterisk seems like overkill for this and I don't want to dedicate a PC for this unless I really have to. Seems like there should be some sort of cheap box out there that can take a single FXO line and link up to an FXS device using SIP or some similar protocol across the public internet. If such a thing exists I have yet to locate it.
This is going to be very low traffic, maybe a couple calls a month at random times.
Any pointers to get me started are much appreciated.