VaxVoIP SIP Recording SDK

VaxSoftCommunication & Messaging ToolsWindows DLL
Version v8.6 (Sep 10, 2025)

Develop customizable SIPREC-based VoIP call recording solutions.

  • Build SIPREC-compliant servers to record SIP-based VoIP calls.
  • Access live PCM audio streams for storage or analytics processing.
  • Use event-driven APIs and sample code to build recording services.
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Build a SIP-based call recording server (using the SIP REC extension) within your existing VoIP network.
VaxVoIP SIP Recording SDK provides a comprehensive toolkit for creating SIPREC-compatible VoIP call recording servers on Windows. It supports real-time audio capture, integration with SIPREC protocol clients, and offers ready-to-use samples. Developers can implement encrypted storage for secure handling of sensitive call data, suitable for call centers and compliant applications.

SIPREC Recording Server Implementation

The SDK enables developers to build SIP recording servers based on the SIPREC, Session Initiation Protocol Recording, standard. Applications can receive recording sessions from SIP infrastructure such as PBX systems or session border controllers and capture audio streams for archiving, compliance, or analytics systems.

Real Time PCM Audio Access

Applications can access decoded PCM audio during active recording sessions. This allows developers to implement custom processing logic such as file recording, speech analysis, transcription services, or integration with external media processing systems that require direct audio data.

SIP Session Event Management

The component exposes events and methods for handling the SIP recording lifecycle, including incoming recording sessions, call connection, media reception, and session termination.

RTP Media Stream Processing

The SDK receives RTP, Real-time Transport Protocol, media streams associated with SIP recording sessions and delivers decoded audio data to the application layer. Developers can use these streams to create recording files or route audio into other processing systems.

Support for Common VoIP Codecs

The component supports commonly used VoIP codecs including G711 u Law, G711 a Law, GSM, iLBC, and G729. This compatibility allows recording servers built with the SDK to operate with a range of SIP based communication systems and network environments.

Custom Recording Storage

Developers can implement their own storage logic for captured call audio. The SDK provides access to the media streams while the application determines how recordings are stored, archived, or forwarded to databases, file systems, or external storage services.

Windows Platform Deployment

The SDK is designed for Microsoft Windows desktop and server operating systems. This allows recording servers built with the component to run in Windows based VoIP infrastructure environments where telephony applications and management systems are deployed.

Product Compatibility

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

Component Type

  • Windows DLL