Graphical proxy for less capable terminals

摘要

A voice over IP (VOIP) network 8 includes a graphical proxy server 34 that allows "dumb" terminals ( 32 ) to act as SIP phones or H.323 phones; only the graphical proxy server ( 34 ) needs to support the underlying signaling protocol. The graphical proxy server ( 34 ) includes a graphical server ( 40 ) and a terminal management system ( 42 ). The terminal management system ( 42 ) handles the calls for each associated graphical terminal ( 32 ) and interacts with the graphical server ( 40 ) to provide a customized GUI for each graphical terminal ( 32 ) to display current call status. Each terminal ( 32 ) has a respective instance of a terminal controller program ( 56 ) in the terminal management system ( 42 ). The terminal controller for a terminal ( 32 ) controls the terminal's GUI responsive to incoming SIP messages directed to the terminal and generates SIP messages responsive to user interaction with the terminal's GUI.