| http://www.w3.org/ns/prov#value | - For example, when setting a communication path between the telephone terminal 70 a and the telephone terminal 70 b, the communication path setting unit 20 b transmits, to the VoIP gateway 50 b, information such as the telephone number of the telephone terminal 70 b, the IP address of the VoIP gateway 50 a, the port number to be used, the RTP profile and other information of the VoIP gateway 50 a o
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