| http://www.w3.org/ns/prov#value | - On the other hand as shown in FIG. 2, the dedicated telephone 21 accommodated in this key telephone apparatus comprises a communication interface 22 for establishing a control channel and an information channel between the main unit 1, a controller 23 for controlling the operations of the dedicated telephone 21, a display 24 for displaying various information such as a dialing number, a speaker 25
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