| 摘要 |
PURPOSE:To transmit data and voice information in using a common transmission line by using a means switching a data stored in an RAM and voice information modulated by a transmission signal. CONSTITUTION:An input means 1 has a keyboard processing input data and a key S giving a command whether a digital data or voice information is transmitted. A data transmission interface 7 has a moudlating means transmitting the data of the RAM 4 onto a line L and a democulating means fetching the data. A microphone 8 and an amplifier 9 are input means of the voice information. A voice transmission interface 10 has the modulating means and the demodulating means of the voice informaion. A timer 15 performs measuring of time every time an output of a voice end detecting means 14 is obtained. A switching control means 16 controls by switching the interfaces 7, 10 with a control signal of the CPU. A mode switch 17 selects the operating mode of a terminal device. |
