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 a new one from scratch. It accelerates the development of a 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 supports DTMF, adaptive silence detection, adaptive jitter buffer! Also using our voice conversation SIP API you can work through a 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 the latest evaluation version (evaluation version includes C++, Delphi, C# and other languages examples, so you can see our sip DLL in work).

System Requirements: WinXP/2k/Vista/7.
Keywords: VoIP Server SDK, SIP registrar SDK, softphone server.

The new Version 2.1 comes now with:

  • IM interface added
  • fixed issue with RFC4566
  • Codec disabling
  • Help updated
  • Samples updated
  • Playback of different formats of WAV files
  • Software volume control
  • The new Version 2.0 comes now with:
  • Noise Reduction option
  • Auto Gain Control option
  • Added local number parameter
  • Jitter buffer parameters
  • No forms event rising problem fixed
  • Samples updated
  • Help updated

The new Version 1.6 comes now with:

  • FAX recognition
  • Conference support introduced
  • Added new VC6 sample
  • Samples updated
  • The new Version 1.5 comes now with:
  • fixed STUN support
  • added support of Authorization Id

The new Version 1.4 comes now with:

  • Mute Sound
  • VPN support
  • Fixed VB6 compilation issue

The new Version 1.3 comes now with:

  • Call transfer support
  • Added status code on call reject
  • Added Unauthorized and Trying events for user registration
  • Fixed bug with default sound device
  • Fixed to be recognized as a valid ActiveX component
  • Samples updated

The new Version 1.2 comes now with:

  • Added Hold/Retrieve
  • Added Record conversation into WAV
  • Delphi sample updated
  • VB sample updated
  • HTML Javascript sample updated
  • Extended OnIncomingCall event arguments

The new Version 1.1 comes now with:

  • Added ability to play wav files into conversation
  • New event OnPlayFinished to know when play is finished

Quick Facts:

  • Registrar
  • Highly customizable
  • SIP client authentication
  • PC to Phone call services.
  • PC to PC call services.
  • VPN support
  • DTMF support
  • specific optimizations to offer high performances
  • Samples on Delphi, C#, VB, VB.NET, C++ 2005, C++ 6.0
  • Windowless samples on C++ and .NET
  • Royalty-free licensing
  • No Yearly/Monthly fee
LicensePrice / Buy
Full Version, no support includedContact [email protected] for details.
Full Version, 30 days supportContact [email protected] for details.
Full Version, 1-year supportContact [email protected] for details.
Full Version, lifetime supportContact [email protected] for details.

Nowadays we offer a really GOOD DISCOUNT allowing you TO SAVE considerably. For further information please contact us at [email protected]

Terms Of Use

By using this product you agree with the terms and conditions expressed in the License Agreement.

Have a question?

For more details check our dedicated site link to If you have any questions regarding the product, purchasing, licenses etc, please don’t hesitate to contact us at В [email protected] with the subject “VoIP SIP Server SDK”.

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