If your phones support multiple calls, you can configure your extensions to reject or redirect additional incoming calls when an extension is already busy with a call. Kerio Operator now handles incoming calls using the configuration set in the Ringing Rules dialog box.
- In the Administration interface, navigate to Configuration > Users.
- Select an account and click on Edit. The Edit User dialog box opens.
- Navigate to Extensions.
- Select an extension and click on Ringing Rules.
- Enable the Allow only one incoming call option.
- Click on OK.
Conduct a test call on that specific extension and verify if the calls are being rejected when the extension number is in use.