COMPOSITE RADIO PHONE, PERIPHERAL UNIT FOR COMPOSITE RADIO PHONE AND METHOD FOR DISCRIMINATING TELEPHONE FUNCTION

PROBLEM TO BE SOLVED: To simplify a composite radio phone peripheral unit by using only one external terminal and to enhance the convenience of a user with respect to the composite radio phone peripheral unit composed of a plurality of composite radio phones with a function of a radio phone system and a plurality of radio phone peripheral units. SOLUTION: A composite radio phone 58 composed of a cellular mobile phone 56 and a PHS 57 uses one connector 71, which can be connected to cellular mobile phone connectors 721-723 of the same configuration respectively for a data communication connection unit 50 in common for cellular mobile phone/PHS (A) 511, a data communication connection unit for cellular mobile phone (B) 512 and a data communication connection unit for PHS 52. Furthermore, a data communication connecting unit is automatically discriminated and the connector 71 is logically converted as required in accordance with the data communication connection units 5.