Canon Kabushiki Kaisha

Koichiro Ohtsuka

Makoto Kobayashi

Shinichiro Kohri

Hitoshi Saito

Toru Maeda

Masanori Momose

Masashi Kimura

Satoshi Imai

Naoki Sugawara

Seiji Ohmori

Shinichiro Kori

Takaaki Hashimoto

A facsimile apparatus using a selective polling signal includes a holding unit for holding a polling image, a receiving unit for receiving the selective polling signal, an extraction unit for extracting a process command for the image held in the holding unit from the selective polling signal received by the receiving unit, and an execution unit for executing the process command extracted by the extraction unit.

Facsimile apparatus using a selective polling signal

In a recording apparatus with plural sheet cassettes of different sizes, a cassette selecting method consists of calculating cassette information for each cassette based on the length and width of the image to be recorded, comparing the cassette information for the different cassettes and selecting an optimum cassette according to the comparison. The cassette information becomes larger in magnitude as the priority for selection becomes higher, represent various image forming modes.

Facsimile apparatus

A communication device includes a storage medium for storing a program and information used to detect any error in the program, to prevent the communication device from further abnormal operation when an error occurs in the stored program. The occurrence of an error in the program is detected by performing a calculation based on the stored program, and comparing the result of the calculation with the above-described information stored in the storage medium. A predetermined operation is further performed depending on the result of the comparison.

Communication device provided with a storage medium for storing a

A facsimile apparatus and a facsimile communication method prevent the termination of communication in error due to memory capacity shortage when confidential communication or relay designation communication is effected by using a sub-address additionally recommended by the CCITT/T.30. When a remaining capacity of an image memory is smaller than a preset threshold, sub-address control information representing the invalidity of the sub-address is stored in sub-address control memory means. As a result, when an initial identification signal or a send command signal is sent to a destination station, a bit indicating that the sub-address is valid is sent without being set. Namely, the invalidity of the sub-address function is informed to the destination station. Thus, the confidential reception or the relay designation reception using the sub-address is not accepted and the termination of the communication in error due to the memory capacity shortage is avoided.

Communication apparatus

Growing community of inventors

Kawasaki, Japan

Koichiro Ohtsuka