Highly customizable VoIP SDK to accelerate development of H.323 applications
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 you can free download H323 VoIP SDK 1.0 now.