| 摘要 |
PURPOSE:To perform the communication of public data via a dial telephone set by adding an acoustic coupler to a main body which contains a reading function for data stored on a magnetic card and a data input function which is executed by operation of keys. CONSTITUTION:A magnetic reading circuit 21 which reads the information on a magnetic card is provided together with an input means 3 which feeds various data with operation of keys, a circuit 27 which converts the data signals sent from the circuit 21 and the means 3 into a PB signal consisting of two different sound frequencies, and an acoustic coupler 9 which is attached to the transmitter microphone of a telephone. It is possible to both data on the card and data fed by operation of keys. |
