Conference call
（重定向自Audio Conferencing）
![A Polycom phone made specifically for conference calls.](/Images/godic/202412/22/Conferencecallphone3013.jpg")
A conference call is a telephone call in which someone talks to several people at the same time. The conference calls may be designed to allow the called party to participate during the call, or the call may be set up so that the called party merely listens into the call and cannot speak. It is sometimes called ATC (audio tele-conference).