
Description: unxsVZ uSIPSwitch is an open-source SIP proxy and registrar server for VoIP networks. It handles SIP signaling and registration and can route calls between IP phones, softphones, and VoIP providers. Useful for building multi-tenant VoIP platforms.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Yate is an open-source telephony engine and server for VoIP and legacy telephone infrastructure. It supports multiple protocols and interfaces for building communications solutions.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API