You cannot answer calls and get the error message "WEBRTC line is not registered".

[Jose Suarez]

Hello please help, I have this case with a MacOS user.

The application worked fine for a few days, then it proceeded to not let the user answer the calls. When user attempted to click the green phone button, it would automatically pop up additional 2 calls, for a total of 3 calls, on the dial while still hearing an incoming ring.

Sometimes user get a message: "WEBRTC line is not registered"

 

[OlegR_3CX]

Hello @Jose Suarez
the issue you have: WebRTC line is not registered, this often happens if
1. HTTP protocol is used instead of HTTPS
2. If the server has not yet registered a new device
3. Error on the server and WebRTC device registration is not possible

You need to make sure that your PC NIC does not go to sleep as a result of causing this. You can look into the networking settings for optimization etc.
Additionally, this can be caused when using antivirus/security apps. If your PC uses a VPN, this can also be related as it can be due to the networking connection.