Webrtc Line Is Not — Registered

: Switching from Wi-Fi to Ethernet, docking a laptop, or waking a computer from sleep can break the existing connection.

Try registering the with a standard SIP client (e.g., Linphone, Zoiper) on the same network.

| 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 . | webrtc line is not registered

The error is rarely a single hardware failure; instead, it usually stems from software or network interruptions:

In your WebRTC client, look for a or Refresh button. If absent, restart the client or browser. : Switching from Wi-Fi to Ethernet, docking a

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

: Occasionally, the browser extension or the desktop app's background process stops responding properly. Ensure extension is allowed for WebRTC in 3CX console

// Handle errors pc.onerror = (event) => console.log("WebRTC line registration failed"); ;

To make or receive calls, a WebRTC client must first "register" with a SIP (Session Initiation Protocol) registrar or a signaling server. This process is like checking into a hotel; the server needs to know your "room number" (IP address and port) to route incoming traffic to you. When the line fails to register, it means the "check-in" handshake was never completed or was rejected. Common Culprits