| 摘要 |
PURPOSE: To perform the control operation of ordinary electro-static copying in parallel with data communication with the outside by incorporating a modem in an electrostatic copying device. CONSTITUTION: A modem 356 is considered to operate as a physical interface between a marking/imaging board 306 and an external telephone line to a host system. Besides a representative RS-232 interface, a control line 354A includes a reset line by which the modem is reset by hardware. This hardware function is provided to be able to reset the modem interface through a communication controller chip(CCC) 352 without turning off the power source at the time of the occurrence of a fault in the modem or communication. Consequently, the electrostatic copying function of the system is not damaged at all. Thus, the electrostatic copying machine and the modem incorporated in the electrostatic copying system can simultaneously communicate with a remote system while completely maintaining the copying function. |
