When a prospect returns your call, a green bar will appear at the bottom of the Outreach platform. If you're using VOIP, the call will appear on your browser window. If using bridge, you'll have the option to accept the call either on your bridge number or within Outreach. If the number is associated with a prospect, their name will appear. Otherwise we'll show the number of the incoming call.
You'll have the option to accept or reject the incoming call by clicking on the appropriate option on the page.