We just purchased a Toshiba CTX670 with the VOIP card. Our provider isn't much help at all. Like others have said, they claim you just plug it in and it should work.

I'm curious as to where you change the codec. We have the WinAdmin software but I haven't seen that setting anywhere for the VOIP card. Is there another way to configure the card?

We connect our VPN via Windows XP. How would you use the phone over a VPN connection?