CallExchange SIP Phone is a browser extension designed to transform Chrome into a robust WebRTC SIP softphone specifically for the CallExchange PBX platform. It allows users to make and receive calls directly from their browser without the need for additional software or hardware. The extension supports features like ChanSpy whisper mode for real-time coaching, DTMF support for navigating IVR menus, and a full audio experience with customizable ringtones and volume control.

This tool prioritizes security and privacy, with all signaling conducted over encrypted connections to ensure the safety of user data. It remembers user settings for convenience, storing credentials locally within Chrome's secure storage. To use the extension, users must have an active CallExchange PBX account and a registered PJSIP extension with WebSocket transport enabled, along with microphone access for audio calls.