Voice over IP H323 SDK - Version 2.1 Our brand-new VoIP H.323 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 intern networks either by speaking and delivers 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 other.