| Symptom | Most Likely Fix | | :--- | :--- | | Works on Web Client, fails on Desktop App | Clear AppData config or reinstall app | | Works at home, fails at office | Corporate firewall blocking port 443/5090 | | Fails after Antivirus update | Whitelist app or disable SSL scanning | | Fails when VPN is ON | Disable VPN or enable split tunneling | | Shows "Certificate Error" | Install 3CX SSL cert locally |
The "WebRTC Line is not registered" error typically occurs when the 3CX Desktop App is unable to register the user's extension with the WebRTC service. This can be caused by several factors:
The "WebRTC line is not registered" error in the 3CX Desktop App typically indicates a disconnection between the application and the 3CX server, often triggered by network changes or system sleep cycles . Immediate Workarounds webrtc line is not registered 3cx desktop app
: Click the bell icon in the top-left of the web client and allow notifications. You can also manually allow them in Chrome by navigating to chrome://settings/content/notifications and adding your 3CX FQDN. 4. Firewall & Port Issues
: Go to your computer's Power Options and disable "Allow the computer to turn off this device to save power" for your network adapter. 3. Browser Notification Permissions (v20 Specific) | Symptom | Most Likely Fix | |
: Ensure both your 3CX Server and the Desktop App are updated to the latest versions. In some cases, a full uninstall and reinstall of the Desktop App from the Web Client's "Apps" section is required.
: If a computer enters sleep or hibernation mode, the network adapter may disconnect, causing the app to lose its "registered" status upon waking. Browser/App Outages : Since the Desktop App You can also manually allow them in Chrome
This issue typically stems from network transitions, system power settings, or browser-based notification restrictions.
: Verify that your firewall allows UDP ports 10500 - 10999 . A common mistake is only opening a partial range (e.g., 10600+), which causes intermittent registration failures. 5. Antivirus & VPN Interference
To resolve the "WebRTC Line is not registered" error, try the following troubleshooting steps:
: Moving from a wired connection to Wi-Fi or connecting to a VPN can break the WebRTC registration. Ensure your network is stable before launching the app.