Canon Kabushiki Kaisha

Fumiyuki Takiguchi

Takehiro Yoshida

Motoaki Yoshino

Toshio Kenmochi

Kazutaka Matsueda

Naoji Hayakawa

Hideki Shimizu

Yoshio Yoshiura

Kazuto Yanagisawa

Shigeki Ohno

Sadasuke Kurahayashi

Toru Maeda

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

The invention provides a facsimile apparatus which can perform the re-transmitting operation adapted to receive reception data in a good state on the reception side upon error re-transmission when a both-side document sheet is transmitted. At the time of a facsimile communication, the presence or absence of a both-side reception function is notified from a receiver to a transmitter and the both-side document sheet is designated by a DCS signal from the transmitter to the receiver. When the both-side document sheet is designated by the DCS signal, the front side and the reverse side are sequentially transmitted. When shifting to a one-side document sheet in the middle of the page, the one-side document sheet is designated by the DCS signal by returning to phase B. When the one-side document sheet is designated by the DCS signal and transmitted and the sheet is shifted to the both-side document sheet in the middle of the page, the both-side document sheet is designated by the DCS signal by returning to phase B and, thereafter, the front side and the reverse side are sequentially transmitted. As for the error re-transmission when an error occurs during the communication, the re-transmission from the front side is always performed upon transmission of the both-side document sheet.

Facsimile apparatus

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 communication apparatus (e.g., a facsimile apparatus) having ITU-T V. 8 and V. 34 recommendations, when it is determined that a partner has the V. 8 and V. 34 functions, the apparatus omits detailed determination processing of reception of an ANSam signal in V. 8 communication, and shifts control to transmission of a CM signal in the V. 8 communication, thereby shortening the time required for the V. 8 communication.

Communication apparatus having communication function complying with

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.

Growing community of inventors

Yokohama, Japan

Fumiyuki Takiguchi