When you're on a call using Webex, your desk phone shows that you have a Remote active call. Depending on your setup, you can move the call between the app and your desk phone.
Although the specific information and softkeys that display on your desk phone differ depending on your particular setup, here's how a call might look on Brandon's phone when he uses Webex to talk to Brenda.
You can put a call on hold in Webex or from your desk phone. While on a call in Webex, select More and then select Hold. On your desk phone press Resume. Or, on your phone, press and then press Resume in Webex.