DOCUMENT TRANSMISSION METHOD IN UNIDIRECTIONAL CATV NETWORK, FACSIMILE INTERFACE DEVICE FOR TRANSMISSION/ RECEPTION USING THE DOCUMENT TRANSMISSION METHOD, DATA TRANSMITTER-RECEIVER FOR CATV AND DOCUMENT TRANSMITTER

摘要

PROBLEM TO BE SOLVED: To easily accelerate data transmission and to freely select a document transmission/reception terminal in a document transmission system for transmitting and receiving image data by utilizing a unidirectional CATV network. SOLUTION: A facsimile is used for terminals for transmission and for reception, the signals of a voice band from the FAX 11 for the transmission are converted to digital signals by this FAX interface device 12 for the transmission and the digital signals are modulated by a CATV data transmitter 13 and sent out to the unidirectional CATV network 17. Modulated signals sent out to the unidirectional CATV network are demodulated to the digital signals by a CATV data receiver 14, then converted to the original signals of the voice band by the FAX interface device 15 for the reception and transmitted to the FAX 16 for the reception.