Telepati SIP Phone Freeware allows you to make PC-PC phone-phone calls over the Internet.

Developed using Research Labs VOIP SIP Phone SDK, this free soft phone brings SIP protocol support for ActiveX.

With this phone once you set the gatekeeper proxy with the username and password from your providers, you can connect and start speaking with anyone on the internet.

Now VOIP open source projects have made it easier to implement a customized VOIP Solution eliminating costly PSTN lines.

Though this implementation might turn out fairly complex, our VOIP Implementation Team at Research-Lab will guide you remotely for the same.