Below is a listing of open source software having to do with Telephony. For a list of VoIP and business telephone providers please visit Voip-Info.org.
Uranium, is a program which communicates with any commnunication device (such as a Modem) that is plugged in a serial or usb device. It can change the device settings, receive and make calls, receive and send faxes and it is an answering machine too
ham radio repeater software controlled controler run your own repeater without expensive hardware just your computer and transcievers made for linux/unix we need help creating this so please email me at email@example.com to join in.
CaminoTalks is a open source, cross platform videoconferencing system. It is designed to work behind a firewall and can have mutiple connections. It works with all popular Messengers like MSN, AIM, ICQ, GAIM. It overcome Netmeeting/H323.Videoconference.
FreePhone is an easy to use IP phone application. FreePhone supports major platforms and protocols. Features include Conference calling, Voice mail and Chat rooms. A SDK is available for you to make additional features.
This app is a clone of kisdnmon (kisdnmon.sourceforge.net) which will be mainly designed to run under Windows (but under Linux as well). Alongside JIsdnMon there is a server written in java called JIsdnCallServer.
A couple of tools for enhance the capabilites of the \"Movistar TSM100 GSM/GPRS smartphone\". It includes soft for adding your own MIDI melodies, images, and Java applications to the TSM100 telephone.
The PABX project is a complete suite of programs that serve for capturing messages (number called, cost, trunk etc.) from key phone systems (PABX). These messages can be used to calculate the cost of your phone calls.