| http://www.w3.org/ns/prov#value | - The control unit 301 executes a program which stores processes of the Internet telephone system. [0283] The memory unit 302 includes a memory such as a RAM or a ROM, and stores the program to be executed by the control unit 301 and the data obtained in the process of execution. [0284] The display unit 303 is implemented by a CRT or an LCD (liquid crystal display panel) to display various informati
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