Patent ID: 7778195

Claim:
A network comprising: Internet protocol terminals for establishing communication using an initiation protocol used in connection-oriented communication in which connection to a destination is confirmed over an IP network for the communication; and a server apparatus constituting the network along with the Internet protocol terminals, the server apparatus comprising: a detecting unit for detecting a speech quality between the Internet protocol terminals; a calculating unit for calculating an optimal speech quality based on the detected speech quality information; and a notifying unit for notifying the Internet protocol terminals establishing communication of the calculated optimal speech quality, wherein the Internet protocol terminals establish communication with the speech quality being set to the optimal speech quality, which the server apparatus notifies to the Internet protocol terminals, wherein the speech quality is detected during the establishing of communications between the Internet protocol terminals, wherein the calculating unit determines an audio level based on signals transmitted from the Internet protocol terminals establishing communication to calculate an optimal audio level based on the determined audio level, wherein each of the Internet protocol terminals includes a notifying unit for notifying the server apparatus of a list of the types of CODECs and bandwidth information being used in the communication and being available in the Internet protocol terminal, and wherein the calculating unit calculates an optimal bandwidth based on the list of the types of CODECs and bandwidth information supplied from the Internet protocol terminals establishing communication.