VoIP SIP SDK - Version 3.5 VoIP SIP SDK is a sip soft phone solution to quickly build voip softphone to dial and receive phone calls or add voip chat features in your software application.VoIP SDK provides a powerful and highly customizable solution (SDK includes such features: SIP activeX control, Dynamically loadable codecs, DTMF, STUN support, IM interface, Adaptive silence detection and many more) to quickly add SIP based dial and receive phone calls (to make a long story short - voip client) features in your software applications. It accelerates the development of SIP compliant softphone with a fully-customizable user interface and brand name.The VoIP soft phone sdk contains a high performance VoIP conferencing client capable of delivering crystal clear sound even for both low and high-bandwidth users and SIP compatible devices (hardware and software). It enables a worldwide communication over the internet or intern networks either by speaking and delivers superior voice quality by voip soft phone. It supports