ABTO Software VoIP Video SIP SDK 4.7
Quick facts about ABTO Software VoIP Video SIP SDK for Windows:
No yearly/monthly fee
No limitation for number of users, channels, or products
SIP, RTP, SDP, TCP/UDP, STUN, ICE
ActiveX, COM, and plain dll files
Encryption on the basis of sRTP, DLS, DTLS, and zRTP
Samples (C#, C++, VB.NET, VB...