If you're going to be away from your desk but don't want to miss an important phone call, you can forward your calls to another phone number. Or, if you don't want to be interrupted, you can send all your calls to voicemail instead. If you forward your calls to another number, you won't get called in Webex App anymore. So, be sure to turn call forwarding off when you're ready to take calls in the app again.
Turn on Call Forwarding
1) Click on Settings -> Calling.
2) Find the "+" icon under the "Call Forward" heading. Enter a phone number.
3) Click on the dropdown under "Forward calls to" and select the phone number you entered.
Disable Call Forwarding
1) Click on the dropdown under "Forward calls to" and select "Do Not Forward Calls"