The "Line is not registered" error for WebRTC is almost always related to security certificates or firewall settings. By ensuring the server has a valid Let's Encrypt certificate and that the necessary ports are open, you can resolve the vast majority of WebRTC connectivity issues in 3CX.
Browsers require explicit permission to access the microphone and camera. If permission is denied, the WebRTC client often fails to initialize registration. webrtc line is not registered 3cx
: For v20 users, ensure notifications are allowed. Click the bell icon in the top-left of the Web Client or go to chrome://settings/content/notifications to whitelist your 3CX FQDN. The "Line is not registered" error for WebRTC
Right-click the 3CX icon (blue circle) in your browser's toolbar and select Reload extension . If permission is denied, the WebRTC client often
If the issue affects only specific extensions:
: If you use the browser extension, right-click the blue 3CX icon in your browser toolbar and select Reload extension .