
Description: 3CX is an open-source IP PBX software solution that works with popular SIP phone systems. It offers unified communications features like auto attendants, call routing, voicemail, video conferencing, and more.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: OpenSIPS is an open source SIP proxy and B2BUA server used to build and deploy SIP platforms and VoIP infrastructures. It provides advanced routing, signaling, and session management capabilities for building large scale SIP networks.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API