. "As shown in FIG. 3, the telephone set 1 is made up of a section including a telephone network 13, a microphone 14 and a receiver 15, and another section including a push-button dial 3, a card reader 5, a lamp-key unit 6, a display panel 7, an input/output interface 17, a line interface 18, a memory 19 and a character generator 20, all controlled by a controller 16." . . .