MicroSIP

MicroSIP is an open-source SIP softphone designed for Windows, utilizing the PJSIP stack to facilitate high-quality VoIP communications. The application is lightweight, with a footprint of over 2.5 MB and minimal RAM usage exceeding 5 MB, making it suitable for various Windows environments.

Key functionalities of MicroSIP include:

- VoIP Calls: Users can make free person-to-person calls and affordably connect internationally using the SIP protocol.
- Audio and Video Support: The software supports both voice and video calls, allowing for flexible communication options.
- Messaging: Users can send and receive messages as part of their communication experience.
- Extensive Codec Compatibility: MicroSIP offers support for a wide array of codecs, ensuring that users can optimize call quality according to their needs.
- Privacy and Security: The application includes configurable encryption options, enhancing user privacy during communications.
- Multilingual Support: MicroSIP is accessible in multiple languages, catering to a diverse user base.

MicroSIP operates without the need for registration with a SIP server, allowing users to manage accounts and contacts directly through the system tray icon. Additionally, it supports various audio codecs to optimize call quality, with recommendations available for best practices. The app also features call transfer capabilities, though compatibility may depend on the PBX system used.

Overall, MicroSIP provides a user-friendly interface and meets the needs of individuals seeking a reliable and efficient SIP softphone solution.