Abstract: A facsimile transmission method according to the present invention is a facsimile transmission method of transferring a color image from a sending station to a receiving station through a communication line; the method including the steps of: reading an image of a colored original, generating a plurality of image data corresponding to predetermined color components respectively, and storing the image data in a memory at the sending station before calling up the receiving station; calling up the receiving station and determining a color printing ability of the receiving station; and sending appropriate image data from the sending station to the receiving station in accordance with the color printing ability of the receiving station.

Abstract: A copying machine executing a processing for connecting a control center and a communication line by activating a modem when a trouble is detected, and transmitting data related to the trouble to the centralized control unit of the control center after the connection of the communication line is made, the machine includes a display apparatus, a communication control apparatus for monitoring the communication state of the modem, a memory in which data for display corresponding to each communication state is stored, display control apparatus for reading data for display corresponding to a communication state monitored by the communication control apparatus from the memory when a trouble is detected, and controlling the display apparatus to display the data.

Abstract: A facsimile machine having a memory reception mode in which image data received from a transmitting facsimile machine during an automatic reception is temporarily stored in a memory, and is provided with a detecting part for detecting a remaining memory region which is usable within the memory. The invention includes a line density switching part for instructing switching of the line density if the remaining memory region detected by the detecting part is less than or equal to a predetermined region, and a control part for making a capability notification to the transmitting facsimile machine in a pre-procedure during the automatic reception. The control part automatically transmits the capability notification again to the transmitting facsimile machine in response to the instruction from the line density switching part so as to receive the image data from the transmitting facsimile machine with a line density which is lower than an initial line density at the time when the automatic reception is started.

Abstract: A communication apparatus has a recording device operable in a first recording mode for effecting a multi- or full-color recording in response to image signals received and a second recording mode for effecting monochromatic recording in accordance with image signals received. A discriminator is used for discriminating that the operation in one of the first and second recording modes becomes incapable, and a device notifies a result of discrimination by the discriminator to the image signal sending station which sends the image signals to be recorded.

Abstract: A facsimile apparatus in a first station with an error correction mode retransmits signal again in response to a request from a section station. The facsimile apparatus includes a CPU to control a transmission speed of the signal transmission circuit so as to transmit operation control signals such as page information signals relating to a document and post message command signals indicating an operation that is to follow a present operation, at a first transmitting speed that corresponds to a transmission speed used to transmit image signals.

Abstract: An abnormality-handling instructing apparatus for use in a facsimile machine where the operator is able to be properly noticed an abnormality so that an appropriate handling can be effected to the abnormality. The apparatus comprises memory for storing abnormality codes and remedies for the abnormalities; an abnormality code generator for generating an abnormality code in accordance with an abnormality; and abnormality-handling instructing device for reading out the data from the memory in accordance with occurred abnormality and for outputting remedy in characters on the basis of the data.

Abstract: A facsimile machine including a reading device for reading an original image to be transmitted, a memory for storing the read image information, a transmission device for transmitting the stored image information to an external device, a timer for detecting the elapse of a prescribed time from completion of a prescribed operation of the facsimile machine, and an erasure device for erasing the stored image information in response to the detection output of the prescribed time by the timer.

Abstract: A facsimile apparatus comprises a communication control unit for establishing a connection, the communication control unit sending station identification data to a calling station and receiving station identification data from a called station for identification of the station, an image data transmission and reception unit, an image reading unit, an image recording unit, a memory for storing the station identification data of selected stations; and a memory control unit for controlling the memory such that, when a call is made to a called station, the station identification data that is returned from the called station is stored in the memory as the station identification data of the selected stations. The communication control unit rejects reception of the image data transmitted from the calling station when the calling station is not included in a list of stations stored in the memory.

Abstract: A facsimile terminal capable of automatically dialing a telephone number of location where a remote operator can make a response to a voice request. In case of the remote operator being away from a remote station, a telephone communication becomes possible to send a voice message in addition to facsimile transmission.

Abstract: In a trunked communication system that has the capabilities of receiving facsimile transmissions from a communication unit, a method to more efficiently utilize communication resources can be achieved by the following. Once a communication resource allocator has allocated a communication resource to a communication unit for a predetermined period of time, that communication unit transmits at least a portion of a multiple transaction data, which may be a facsimile, to the communication resource allocator. Once the communication resource allocator accurately receives the at least a portion of the multiple transaction data, it transmits an acknowledgement signal to the communication unit. From the acknowledgement signal, the communication unit determines the signal strength of the transmission and also the transmission duration.

Abstract: A communication terminal apparatus connected to a communication network through a data channel for transfer of line transaction data or packet transaction data and through a signal channel for control of a call to a communication destination party. Communication terminal apparatuses are connected to the communication network and subscriber numbers are usually previously designated, as identification data, to all subscribers of the communication network and as necessary, address data (referred to as subaddresses) arbitrarily set among some of these subscribers are attached to the subscriber numbers. These subscriber numbers and subaddresses are transmitted and received through the signal channel separately from transaction data transmitted and received through the data channel.

Abstract: A transmission arrangement is disclosed which facilitates compression of modem modulated facsimile signals for transmission on digital facilities. The presence of a facsimile call is detected and facsimile control messages are obtained by demodulating and interpreting the facsimile call control protocol. A controller is responsive to the obtained control messages for controlling a voiceband encoder to encode the control portion of the facsimile call and for controlling a so-called facsimile page demodulator to demodulate any facsimile page portions of the facsimile call to obtain a baseband digital bit stream. The presence of prescribed tone signals, i.e., echo protection tone (EPT) signals, is detected in the facsimile call. EPT control messages representative of the EPT signals are generated. The encoded control portion of the facsimile call and the baseband digital bit stream representative of the demodulated, i.e.

Abstract: A data transmission apparatus includes an NCU for transmitting data, a control circuit for receiving information representing a receivable capacity from a receiver, and a remaining transmissible paper number display circuit for informing a receivable data amount of the receiver on the basis of the information. A data reception apparatus includes an NCU for receiving data, a control circuit for detecting a receivable data amount of the NCU, and a memory control flag, and write and read pointer address memory circuits, these three of which are arranged to transmit information representing the receivable data amount to the transmitter. A method of communicating data is also disclosed.

Abstract: An image communication method and apparatus use full duplex communication, wherein a receiving station sends position data designating where an error has been detected to a transmitting station via a backward channel while receiving the image data. The transmitting station continues to transmit current image data which is being sent when the position data is received and then retransmits the image data designated by the position data.

Abstract: An image data communication system for controlling an image reader and an image recorder has an optical system for reading an image, a signal processor for processing the read image, microprocessors for controlling image reading and image data communication, and serial circuits for supplying control data. The system allows connection of image readers and image recorders of different types.The system also provides modes for transmitting status data from the image recorder in synchronism with either internally or externally generated clock pulses when the status data is requested by an external command or when an error occurs in an image recording operation.

Abstract: In a method for shifting down a data transmission rate at a transmitter in response to a request from a receiver for retransmission of data frames having data errors in a digital transmission system such as a facsimile system, when transmission errors occur, the receiver transmits a request to the transmitter for retransmission of one or more data frames for which one or more data errors have occurred. At the transmitter, the data transmission rate is shifted down from the first data transmission rate to a second data transmission rate which is used for retransmitting the data frames for which one or more data errors have occurred.

Abstract: A circuit switching system for switching a circuit from a telephone to a facsimile. Circuit switching is performed by a signal, designating circuit switching delivered to the circuit. The circuit is monitored. When a signal designating circuit switching is detected from the circuit, the circuit is switched automatically from the telephone to the facsimile and a starting signal is applied to the facsimile.

Abstract: A facsimile apparatus which transmits original image data separately in accordance with size of receiving sheets at a receiving station includes a receiving page counter for counting the number of the receiving sheets on which the original image data is reproduced, and data corresponding to count value of the page counter is transmitted to the receiving station.

Abstract: An image data transmission method in which a transmitter having a document reading system sends image data to a receiver having an image recording system, controls image data transmission as follows. The receiver lets the transmitter know an image recording characteristic of the image recording system provided in the receiver to the transmitter when the receiver is called. The transmitter adjusts a document reading characteristic of the document reading system so as to match the image recording characteristic of the image recording system provided in the receiver. The document is read by the document reading system provided in the transmitter according to the document reading characteristic. Image data obtained by reading the document is sent to the receiver. The image recording system records an image formed by the image data supplied from the transmitter according to the image recording characteristic.

Abstract: A document reading device suitable for use for a personal computer, a facsimile, and a work station or the like, and comprises a reading means for reading the image information provided on a manuscript, a read controlling means for controlling the reading means in such a way that when the reading operation of the reading means is interrupted while reading said manuscript, a predetermined amount of the image information read by the reading means immediately before said interruption occurred, can be reread after the reading operation is restarted, and a processing means for processing both groups of the image information duplicately read by the reading means before and after the interruption thereof, respectively, by modifying them in such a way that a portion of the image information finally output and based upon the image information read by the reading means before the interruption, and another portion of the image information finally output and based upon the image information read by the reading means afte

Abstract: In a facsimile communication method, a receiving facsimile machine receives a training check field signal TCF from a transmitting facsimile machine and sends a confirmation to receive signal CFR or a failure to train signal FTT to the transmitting facsimile machine depending on a result of the reception of the training check field signal TCF so as to determine a modem transmission speed. A number of erroneous bits in the training check field signal TCF which is sent from the transmitting facsimile machine at an initial modem transmission speed and received by the receiving facsimile machine is detected, and the modem transmission speed is set based on the detected number of erroneous bits. A facsimile information bit which indicates the set modem transmission speed is added to the failure to train signal FTT which is sent from the receiving facsimile machine to the transmitting facsimile machine.

Abstract: An image transmission apparatus includes an original reading unit, a memory, a communicating unit, an impressing unit, and a controller. The memory stores an image signal read by the original reading unit. The impressing means impresses a predetermined stamp on an original. The controller controls the impressing unit so that different stamps are impressed when the read image signal is directly transmitted by the communicating unit and when the read image signal is stored in the memory means.