VaxVoIP SIP Server SDK

VaxSoftCommunication & Messaging ToolsWindows DLL
Version v8.6 (Jul 27, 2025)

SDK for building SIP based VoIP server and telephony services.

  • Develop SIP based VoIP servers and telephony infrastructure applications.
  • Handle SIP signaling, call sessions, and RTP audio streams.
  • Integrate VoIP capabilities into custom Windows server software.
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Build secure VoIP servers, IP-PBX, call centers, and multilingual AI voice agents.
VaxVoIP SIP Server SDK provides a software development kit for creating SIP based VoIP server applications. It allows developers to implement SIP signaling, manage call sessions, and process RTP media streams within custom server software designed for telephony services, communication platforms, and VoIP infrastructure running on Windows systems.

SIP Server Application Development

The SDK enables developers to build server side VoIP applications that implement the Session Initiation Protocol, SIP. Applications can act as communication servers that receive and manage SIP messages, establish call sessions, and coordinate real time voice communication between connected clients or network systems.

SIP Signaling Management

The component processes SIP signaling messages including registration, call setup, session negotiation, and termination. Developers can implement server logic that handles incoming requests, maintains call state, and coordinates communication between SIP endpoints and other telephony infrastructure.

Call Session Handling

The SDK provides functions and events for managing the lifecycle of voice sessions. Applications can detect incoming calls, accept or reject requests, monitor session status, and control call termination while integrating these operations into server side communication services.

Support for Common VoIP Codecs

The SDK supports several widely used voice codecs including G711 u Law, G711 a Law, GSM, iLBC, and G729. This compatibility allows server applications to interoperate with many SIP based phones, gateways, and communication platforms.

Windows Based Deployment

The SDK is designed for Microsoft Windows desktop and server operating systems. This allows VoIP server applications built with the component to operate within Windows based infrastructure environments used for telephony services and communications platforms.

Product Compatibility

Review the details below to ensure this product is supported within your environment.

Component Type

  • Windows DLL