Patent ID: 8386583

Claim:
An information distribution system comprising: a Session Initiation Protocol (SIP) server; and a plurality of terminals registered to the SIP server, wherein each of the plurality of terminals is capable of functioning as a distribution source terminal and/or a distribution destination terminal, the SIP server includes: a storage section to store first terminal information concerning all of the plurality of terminals; an obtaining section to obtain second terminal information of the distribution destination terminal regarding the predetermined information from the first terminal information stored in the storage section when the distribution source terminal requests first distribution destination information concerning the distribution destination terminal; a producing section to produce the first distribution destination information based on the second terminal information obtained by the obtaining section; and a sending section to send the first distribution destination information produced by the producing section to the distribution source terminal, the distribution source terminal functions as a first distribution source terminal and/or a second distribution source terminal, the distribution source terminal generating predetermined information based on a predetermined detecting signal, the first distribution source terminal including, a requesting section to request to the SIP server to send the first distribution destination information; and a distributing section to connect to the distribution destination terminal based on the first distribution destination information, and to distribute the predetermined information to the connected distribution destination terminal by peer-to-peer communication, and the second distribution source terminal including a distributing section to connect to the distribution destination terminal based on the first distribution destination information sent from the SIP server by the request from the first distribution source, and to distribute the predetermined information to the connected distribution destination terminal by peer-to-peer communication, and the predetermined information is distributed by peer-to-peer communication from the distribution source terminal to the distribution destination terminal, between which terminals a connection has been established.