Abstract: A telephone that is capable of information processing using plural instruction codes. An instruction code discrimination circuit compares an instruction code received by an information receiving circuit with first and second instruction codes stored in an instruction code storage circuit to output a first control signal when the received instruction code corresponds to the first instruction code and a second control signal when the received instruction code corresponds to the second instruction code. An ID code discrimination circuit compares a received ID code with an ID code stored in an ID code storage circuit to provide an ID code coincidence signal when a coincidence occurs therebetween. A system control data storage circuit receives the first control signal and the ID code coincidence signal to store system control data. A parameter storage circuit receives the second control signal and the ID code coincidence signal to store parameter information.