| 摘要 |
PURPOSE:To discriminate automatically data communication or not by a terminal equipment or the like to a telephone line automatically when the bell of a telephone rings in case of data communication with acoustic couplers and to report it to a receiver that an ordinary call with voice is desired if a call desiring ordinary speech with voice comes. CONSTITUTION:This device can enter into the transmission state without removing a controller 30 from a telephone set 22 even at the transmission time. Acoustic couplers are used to make automatic incoming similar to MODEMs possible. Since the other party of data communication is a specific person (device), automatic data communication is possible even in a user's absence or the like and persons who desire ordinary calls are not bothered if a time delay is so provided that automatic incoming is permitted only for 10-20 or more calls. Since the output of a signal detector 11 is received by an inverter 13, and AND between the output of the inverter 13 and the output of the second timer 9 is operated to operate a ringer 15, it is reported that ordinary call without a carrier for data communication is desired. In this case, a ringing tone is transmitted to the other party also through a handset. |
