Patent ID: 6163600
Filing Date: 2000-12-19
Classification: H04N

Abstract:
A communication apparatus using a telephone line for selectively transmitting and receiving a voice signal and an image signal via the telephone line, the communication apparatus comprising:circuit control means for closing and opening the telephone line;voice signal communication means connected to the circuit control means, for transmitting and receiving a voice via the telephone line, the voice signal communication means includes a line length compensating circuit;image signal communications means connected to the circuit control means, for transmitting and receiving an image signal via the telephone line;a termination resistor connected between the image signal communications means and the circuit control means, which said termination resistor servers as a termination for both the voice communication means and the image signal communication means;transmission instruction means for instructing a start of transmitting either the voice signal originated from the voice signal communications device or the image signal originated from the image signal communications device;a controller which responds to an output of the transmission instruction means, and controls the circuit control means to close the telephone line and isolate the image signal communication means from the termination resistor, when an instruction to start transmitting the voice signal is given, or to close the telephone line and isolate the voice signal communication means, when an instruction to start transmitting the image signal from the voice signal communications device is given.