Abstract: A voice communication system transfers voice information stored in a protocol data unit under a predetermined communication protocol over a network, and includes end voice terminals for transferring and receiving the voice information, and a management server for managing said end voice terminal. The management server includes a manager for storing subscriber information indicative of whether or not the end voice terminals are provided with the capability of predetermined broadband voice communication. A user is informed, at the latest before the user initiates a call from the end voice terminal, of whether or not a telephone set of a called party is provided with the capability of the broadband voice communication through the end voice terminal based on the subscriber information. running in a network under a predetermined communication. This increases the satisfaction of the user and allows a business model justifying charging customers to be built.

Abstract: In a voice communication system for transferring voice information stored in a protocol data unit under a predetermined communication protocol over a network under the protocol, end voice terminals for transferring and receiving the voice information in the protocol data unit, and a management server for managing said end voice terminal are provided. The management server includes a manager for storing subscriber information indicative of whether or not the end voice terminals are provided with the capability of predetermined broadband voice communication. A user is informed, at the latest before the user initiates a call from the end voice terminal, of whether or not a telephone set of a called party is provided with the capability of the broadband voice communication through the end voice terminal based on the subscriber information. running in a network under a predetermined communication. This increases the satisfaction of the user and allows a business model justifying charging customers to be built.