Unfiltered Grounds

Here is an example of where project paperclip may have gone…

Using an Internet Connection and VoIP Phones you can make direct IP calls without signing up or paying for any telephone service. Placing a call like this is usually done by technicians on PBX networked phones to test the connection between phones. This can be done with a soft phone or any type of VoIP compatible handset; as well as a POTS-to-IP bridge if you have an investment in your POTS phone. Faxing also works if the bridge support T.30 (Grandstream has support).

If you have a headset, speaks/mic for your computer then there is no additional hardware needed. But there is also support for audio over most IM clients, which you would likely be using.
Direct IP Calling does not allow one to call ma-bell phone numbers. This technology uses SIP Protocol.

To place a direct IP free call attach your phone to your network. Typically the phone is attached behind a router/firewall NATed in which case your router has a public IP address and your phone has a private IP. Soft-Phones will do this Read more…