The Call Park feature allows you to place a call on hold, so it can be retrieved from another phone in the Cisco CallManager system (for example, a phone in another office or in a conference room). If you are on an active call at your phone, you can park the call to a call park extension by pressing the Park softkey or the Call Park button. Someone on another phone in your system can then dial the call park extension to retrieve the call.
For more information on how to use and configure the Call Park feature, refer to the Call Park and Directed Call Park chapter in the Cisco CallManager Features and Services Guide.