Patent ID: 8358646

Claim:
A temporary connection number management system which connects a first terminal and a second terminal to each other by using a temporary connection number via a communication network that is subject to call control by SIP (Session Initiation Protocol) and capable of transmission-quality reservation, comprising: a temporary connection number issuing device that issues the temporary connection number to the first terminal in response to a request from the first terminal; and a SIP proxy server in which the temporary connection number transmitted from the first terminal is registered, in which the first terminal includes temporary connection number requesting means for requesting the temporary connection number issuing device to issue the temporary connection number, registering means for registering in the SIP proxy server the temporary connection number issued from the temporary connection number issuing device in response to the requesting from the temporary connection number requesting means, notifying means for notifying the second terminal of the temporary connection number, communication control means for performing communication with the second terminal via the SIP proxy server by using the temporary connection number, and unregistering means for unregistering the temporary connection number registered in the SIP proxy server, further comprising condition storing means for storing a number of conditions for connecting to the terminal by using the temporary connection number, in which the first terminal and the second terminal perform communication only when the number of conditions are met, and in which each condition of the number of conditions is set by a user.