[Asterisk-Users] Interface analogue exchange line to VOIP phone?

[Rich Adamson]

> I have a potential customer who has an existing PBX with analogue FXS
> ports connected to phones. He wants to allow a single remote worker
> to be connected to one of the analogue extension ports using VOIP.
> 
> I know I could do it using Asterisk with an X100P card, but that seems
> a bit overkill. Does anyone know of an analogue->VOIP adapter that has
> an FXO port in it instead of just an FXS port? i.e. designed to connect
> to an exchange line instead of a phone? The VOIP port on the adaptor
> would then be made available over the internet, for the remote worker
> to connect his VOIP phone to.

A pair of Sipura spa-3000's (see forum at voxilla.com for configs). Also,
some combo of spa-1000 and spa-3000 is likely to handle it.

Lots of other vendors out there doing the same thing. Most of those
products have been sold in the past as "toll bypass" products, but they
are doing exactly what you want.