System for communicating call status information in an internet protocol network

摘要

A communication terminal includes a controller to, when a call set up between the communication terminal and a second communication terminal in an internet protocol network is released, encapsulate in a call release request message call status information relating to at least one status of the call and transmit the call release request message. The communication terminal further includes an output element coupled to the controller to transmit the call release request message. The call release request message includes the call status information and information indicating the call release.