Abstract: An apparatus and method for performing a protocol upon receiving a ring signal to thereby receive facsimile transmitted image data, storing the received image data in a memory, and when image data read out from the memory is black data over a predetermined number of lines, stopping a print operation and displaying a print stop message.

Abstract: A method of stopping a printing operation in a facsimile system includes detecting a ring signal, receiving image data to be printed in the printing operation after detecting the ring signal, and stopping the printing operation and displaying an error message when the image data is determined to contain a predetermined number of consecutive black data lines. The predetermined number of consecutive black data lines represent a length on a recording sheet that is greater than or equal to a selected millimeters.

Abstract: A power saving facsimile includes a power supply circuit for supplying a plurality of voltage levels. A switch disconnects and connects the plurality of voltage levels from and to corresponding circuits in response to first and second states of a switching control signal, respectively. A driving signal output circuit outputs a driving signal in response to sensing a speech forming signal applied from a central office line. A power controller generates the switching control signal in the first state to interrupt the voltages when the facsimile device has not been used for a predetermined time period, and generates the switching control signal in the second state to provide the voltages in response to the driving signal.