The message means:
: Double-check the URL bar. If it doesn't show a padlock icon, try adding https:// to the start of the address. Troubleshooting for Administrators webrtc line is not registered
WebRTC requires (except localhost ). Your client should connect via wss://your-pbx-domain:8089/ws (WebSocket Secure). The message means: : Double-check the URL bar
Verify these in your WebRTC client settings: webrtc line is not registered
From an administrative perspective, the most effective fix is often disabling on the local router. If the error persists, switching the transport protocol from UDP to TCP or TLS can help bypass restrictive firewalls, as these protocols are more "firewall-friendly" and provide a more stable connection for signaling data. Conclusion
| Platform | Common Fix | |----------|-------------| | | Go to Settings → SIP Account → Re-register. Ensure extension is allowed for WebRTC in 3CX console. | | FusionPBX / FreeSWITCH | Check sip_profile → ws-binding and wss-binding are enabled. | | Asterisk (PJSIP) | Ensure websocket_enabled = yes and transport=wss in pjsip.conf. | | Chrome / Edge | Disable any VPN/proxy extensions. Try Incognito mode. | | Firefox | Check about:config → media.peerconnection.enabled is true . |