Nec Corporation

Nec Corporaiton

Hirokazu Mukai

Minoru Nagata

A facsimile machine is provided that can shorten a time period required for a pre-transmission procedure through simple manipulation, thus improving the transmission efficiency. Moreover, a facsimile communications method using the facsimile machine is provided. When initial facsimile transmission is performed to an opposite party of which a number is registered corresponding to at least one of abbreviated dialing and one-touch dialing, a partial step of a pre-communication procedure is stored in correspondence with the registered number. In the second or later communications to the registered number, a stored content is read out. Then, by allocating the stored content to said partial step, a required communication time period is shortened. The facsimile machine has a memory that stores number information on abbreviated dialing and/or one-touch dialing and required information corresponding to the number information.

Facsimile machine and facsimile communications method

A facsimile machine which is provided with functions for executing communication of image data according to ITU-T V.34 mode comprises a communication section, a sequence timer and a control section. The communication section executes a communication sequence for transmitting the image data or receiving the image data. The sequence timer counts a time concerning suspension of the communication sequence according the V.34 mode. The control section changes the communication section into a state for executing communication of image data according to ITU-T V.17 mode, V.29 mode or V.27ter mode, in the case where the sequence timer counted to a predetermined period. Therefore, when the communication sequence according to the V.34 mode stopped for some reasons, the facsimile machine does not wait for recovery of the communication sequence keeping its status until a timeout-period elapses, but monitors the communication sequence until the sequence timer counts to the predetermined period and thereafter changes into the communication sequence according to the V.17 mode, the V.29 mode or the V.27ter mode, thereby communication of fax data can be completed normally even when the sequence according to the V.34 mode stopped, and the sender does not have to be charged with connection charge twice.

Facsimile machine and facsimile communication method

In an image transmission apparatus, image data frames are sequentially received from the source terminal through a connection line at a first transmission rate while checking whether an error occurs in each of the image data frames. When the error occurs in consecutive image data frames whose run length is not smaller than a predetermined value, the transmission rate is changed to a second transmission rate which is smaller than the first transmission rate based on the run length of the consecutive image data frames and the predetermined value. At the second transmission rate, image data frames in which the error occurred are sequentially received from the source terminal through the connection line.

Image data receiving method for receiving retransimitted image data

A communication apparatus, such as a facsimile machine, for transmitting and receiving data to and from a device, includes a transmitter for receiving a first signal from the device and transmitting, in response to the first signal, a second signal for a predetermined time period. The transmitter receives a third signal from the device in response to the second signal, and transmits a fourth signal when the third signal is not received within the predetermined time period and transmits a fifth signal when the third signal is received within the predetermined time period. The transmitter receives a sixth signal from the device in response to the fourth signal. A detector, connected to the transmitter, detects which of the third signal and the sixth signal is received from the device. A controller, connected to the transmitter and the detector, controls a protocol of transmission and receipt of the data.

Facsimile with multiple-protocol capability and method therefor

In a facsimile apparatus capable of executing automatic call termination on detecting a terminating signal, a control device has a frequency detection circuit and a frequency detection control circuit. The frequency detection circuit detects a terminating signal of, e.g., 1300 Hz by monitoring not only the frequency of 1300 Hz but also other frequencies. The frequency detection control circuit accurately determine, based on the output of the frequency detection circuit, whether an input from a network is the terminating signal of 1300 Hz or whether it is noise containing a 1300 Hz component.

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Tokyo, Japan

Hirokazu Mukai