Holding phone calls is a key performance feature of telephone networks and systems. Although a telephone system generally used to be required for placing calls on hold, this performance feature is now supported directly by virtually all telephone networks from the various providers. As a rule, the function is provided by the switchboard or telephone system in combination with other performance features, such as toggling or consulting. When a call is placed on hold, the caller is parked, so to speak, and is unable to communicate with the person on the other end of the line. Wait-music or a pre-recorded message is generally played to the waiting caller. The person who has placed the caller on hold is able to consult other subscribers or perform other tasks during the hold time.