With the right permissions, you can have your own party-line switchboard at your fingertips!  Peer into your Call Dashboard 

Listen Live = Pop in and listen along to the call, without disturbing the flow of the sale

Whisper = aka "Coaching", allows you to listen in on the call, and speak only to your sales rep team member 

Barge In = Create your own invite and jump into the call to chat with the sales rep and the lead like life-long friends