| http://www.w3.org/ns/prov#value | - As shown in FIG. 2, the telephone set 2 comprises a CPU 24 for controlling a communication operation, a random access memory (RAM) 25 for storing data and other information being transmitted and received between it and the central station 3 and other communication parties, a network control unit (NCU) 27 used for connection with communication lines, a control input section 29 comprising pushbutton
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