Canon Kabushiki Kaisha

Yoshio Yoshiura

Takehiro Yoshida

Motoaki Yoshino

Toshio Kenmochi

Kazutaka Matsueda

Naoji Hayakawa

Hideki Shimizu

Fumiyuki Takiguchi

Kazuto Yanagisawa

Shigeki Ohno

Sadasuke Kurahayashi

Toru Maeda

Yukio Murata

Takashi Takeda

Shigeo Miura

Daisuke Suga

Yukihiko Ogata

Yoji Kaneko

Shunichi Fujise

Tomoyuki Haganuma

Kosuke Kunishi

When a data communication apparatus as a sender gateway receives instruction information for instructing a communication system via ITU recommendation T.38 or a communication system via ITU recommendation T.37 from a sender facsimile apparatus as an analogue communication terminal, data communication is executed with respect to a recipient connected gateway on the basis of the communication system instructed by the instruction information.

Communication apparatus and communication method

This invention provides a facsimile apparatus having an E-mail transmission/reception function, which can correctly transmit the contents of a file attached to E-mail even when the file cannot be opened on the other party side. A document file as a file attached to E-mail is transmitted from a transmitting facsimile apparatus and received by a receiving facsimile apparatus. If the attached file cannot be normally opened by viewer software or another application of the facsimile apparatus, the apparatus transmits, as a reply to the received E-mail, an error message containing contents representing that the error has occurred, and a facsimile number to be used by the other party for retransmission to the transmitting facsimile apparatus. When the received E-mail contains an error message, the transmitting facsimile apparatus searches for the attached file to be retransmitted by referring to, e.g., the mail title or mail text. The transmitting facsimile apparatus converts the contents of the attached file into an image and retransmits it to the receiving side in accordance with the normal facsimile transmission procedure.

Facsimile apparatus and facsimile system

A communication apparatus receives the identification information of a partner station, and performs a communication operation in accordance with the received identification information. A first detecting unit detects a calling signal. An identification information receiving unit detects the identification information of a calling party upon detection of the calling signal, and a second detecting unit detects whether or not the terminal of the calling party is a data communication terminal. A registration unit registers the identification information of the partner station in a memory, so that whether the partner station is a speech or data communication terminal can be discriminated later. A control unit checks if the identification information receiving unit receives the identification information of the calling party. When the identification information of the calling party is received, the control unit checks if the-received identification information is registered in the memory, and selectively executes a speech communication process and a data communication process in accordance with the checking result and the detection result of the second detecting unit.

Communication apparatus for receiving identification information of partner station, and executing communication operation in accordance with received identification information

A communication system in which when an incoming call has arrived, a communication line having the capability of a high sampling rate is automatically selected without assistance of an exchange operator by transmitting an ultra high speed modem indication signal indicating the capability of data communication at an ultra high speed modem rate among the capabilities of a called terminal, and receiving an ultra high speed modem capability signal indicating the capability of an ultra high speed modem of a calling terminal.

Communication system having the capability of selecting an optimum communication mode from a plurality of modes, depending on the type of equipment at a party to be communicated with

A facsimile communication system and a communication apparatus reduce a loss time due to the synchronization of transmission/reception and shorten a communication time. They also shorten a communication time in a full duplex communication mode and allow proper switching of the full duplex communication at the transmission/reception replacement. DIS-CFR signals, EOP-DCN signals, NSS-TSI signals and TSI-DCS signals of a facsimile communication protocol are connected by synchronization signals so that the synchronization signals are sent even after the sending of the protocol signal. Thus, the sending of the synchronization signal for one second when the next protocol signal is sent is not necessary and a time required for the protocol signal is shortened. An ANSam signal to disable a function of an echo suppressor is sent when a call is detected and a calling station thereafter sends a protocol signal and an image signal in a manner not to cause signal interruption of 50 ms or longer, and at transmission/reception replacement at the end of the image signal from the calling station, a called station sends an ANSam signal and sends a protocol signal.

Data communication apparatus and facsimile apparatus

In a data communication apparatus, the baud rate and the bit rate of a modem thereof are set independently of each other according to the condition of data communication. Thus, optimum data communication suited to the line condition can be performed.

Data communication apparatus for setting the baud rate and bit rate of a

There is provided a data communicating apparatus which can be connected to different communication networks such as a digital network and an analog network, comprising: a digital network communication control unit (digital NCU) to communicate data through a digital communication network; a telephone network communication control unit (TEL NCU) to communicate data through an analog communication network; a selector to select either the digital NCU or the TEL NCU in accordance with the called number of a destination; a circuit to perform an originating call to the communication network selected by the selector; and a switching circuit for discriminating a response signal from the communication network for the originating call by the originating calling circuit and for switching the communication control unit which is selected by the selector when the response signal is a special code. With the apparatus, a line to be used is automatically selected on the basis of the result of the response signal from the network for the originating call.

Data communicating apparatus which selects analog or digital

A data transmitting apapratus has: a plurality of terminals such as image readers, each for reading original image data and transmitting the image data; a memory for storing the image data from the terminals; a frame processor for producing the frame data from the data stored in the memory; and a controller for transmitting the frame data to the line. A data receiving apparatus has: a plurality of terminals such as word processors, work stations, printers, display devices for outputting the reception data; a circuit for setting an identification number (ID) to each terminal; a controller for receiving the data sent from the line; a decoder for decoding the data received by the controller; a memory for storing the decoded data; amd a circuit for outputting the data stored in the memory to the terminal of the designated ID through the line. Each image reader and each ID have a logical channel group number and logical channel number which are set by a table. With this data communication system, the data transmission and reception can be simultaneously performed, the use efficiency of the system can be improved, and wasted or unnecessary communication time can be eliminated.

Facsimile apparatus connected to data communication network having

A facsimile apparatus has a CCU for receiving image data, a decoder for decoding received data, an image memory for storing the decoded data, a CPU for controlling send/receive operation, and a printer for printing received data. High-speed data communication can be performed using a small-capacity memory and a digital transmission line and without data loss.

Growing community of inventors

Kanagawa-ken, Japan

Yoshio Yoshiura