VoIP SIP Server SDK provides a powerful and highly customizable API solution Based on the Session Initiation Protocol (SIP) to quickly add SIP based server features to your application or to build new one from scratch. It accelerates the development of Session Initiation Protocol compliant server (registrar) with a fully-customizable user interface and brand name. SIP Server SDK in company with our client VoIP SIP Software Development Kit will give you a solution that support DTMF, adaptive silence detection, adaptive jitter buffer! Also using our voice conversation SIP API you can work through firewall or NAT. Our product based on IETF standards (Session Initiation Protocol, STUN, etc.), so it should be compatible with other standard based products such as Asterisk, OpenSER other. Please check Features for more details about our voice internet phone sdk. Also you can download latest evaluation version (evaluation version includes C++, Delphi, C# and other languages examples, so you can see our sip dll in work).

The new Version 2.1 comes now with:

The new Version 2.0 comes now with:

The new Version 1.6 comes now with:

The new Version 1.5 comes now with:

The new Version 1.4 comes now with:

The new Version 1.3 comes now with:

The new Version 1.2 comes now with:

The new Version 1.1 comes now with:

System Requirements: WinXP/2k/Vista/7.

Key words: VoIP Server SDK, SIP registrar SDK, soft phone server.