inTEL(IP)hone SDK Personal Edition

Develop VoIP applications for .NET in minutes, not months. The inTEL(IP)hone SDK is a full-featured SIP/RTP based VoIP stack for .NET. With support for most major audio codecs and features like STUN and UPnP NAT Traversal, audio record/playback, in-band and out-of-band DTMF tones, visual SIP tracing, and speech synthesis and recognition, you'll have everything you need to start developing VoIP applications today.
LicenseFree to try
File Size6.08 MB
Operating System Windows Windows XP Windows 2000
System RequirementsWindows 2000/XP/2003 Server