Yeallink has built this small ATA adaptator , distributed in france with the Wengo SIP service , and with a lot of providers arguing it works with skype…..
This USB box acts as a USB sound card and thus is recognized on Linux BUT a command has to be sent to the box via USB so it can be used as a sound card. Then you can find information about how to drive this box for your application on the linux API project page
NEW : an official GPL’ed project is born to fully support those USB-Box ( rapidbox , skypebox , callmebox)
This is based on libUSB and so will work on Windows, MacOSX and Linux and even GFreeBSD I guess
Seems to work for all yealink product Usb-p1k, b1k etc…
For the moment ( may 2005) it works on linux and all functions are supported , binary realease will come Soon , First inté § ²ation will be for linphone , KIAX and gnomemeeting , No skype client planned …..
Software for windows can be found on the providers pages
The USB-P1K works really fine with Counterpath X-Lite and X-TenMate (http://www.yealink.com/en/otherdown.asp) the most stable version is X-Lite build 1103 and XtenMate version 1.0.0.15 since the new versions of both have some problems