H323 VoIP SDK provides a powerful and highly customizable solution to quickly add H.323 based dial and receive phone calls features in your software applications. It accelerates the development of H.323 compliant soft phone with a fully-customizable user interface and brand name. The Abto LLC VoIP H.323 SDK contains a high performance VoIP conferencing client capable of delivering crystal clear sound even for both low and high-bandwidth users and H.323 compatible devices (hardware and software). It enables a worldwide communication over the internet or intranet networks delivering superior voice quality. It supports DTMF, adaptive silence detection, adaptive jitter buffer! Abto LLC VoIP H.323 SDK is based on IETF standards (H.323, STUN, etc.), so it should be compatible with other standard based products such as Asterisk, GNU Gatekeeper and others. Features of H323 VoIP SDK: * Dynamically loadable codecs * Registrar support * Samples on Delphi, C#, VB, VB.NET, C#, HTML * Bandwidth limiting per URL rule per IP/port * DTFM * Adaptive silence detection * Adaptive jitter buffer * STUN support * Comes as ActiveX control * Royalty free licensing * No Yearly/Monthly fee.