JPH0470052A - Facsimile answering equipment - Google Patents

Abstract

PURPOSE:To prevent the misoutput of the data on other circuits by providing an exclusive OR circuit to secure an exclusive OR with a circuit No. to the date transferred to a buffer memory. CONSTITUTION:A facsimile answering equipment is provided with an anti-host device interface part 1 including an exclusive OR circuit, the buffers 2-4, and the facsimile terminal control parts 5-7 containing the exclusive OR circuits. In such a constitution, the exclusive OR is secured between the data and the circuit Nos when the data received from the host device are stored in the buffers 2-4 corresponding to the circuits. Then the same processing is also carried out when the data are read out of the buffers 2-4 respectively. Thus the misoutput of the data on other circuits is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a facsimile machine, more specifically, to input a facsimile image signal, to a facsimile terminal, to
The present invention relates to a facsimile answering device that performs a multiplex operation for image output over multiple lines, and particularly relates to a device that prevents image signals from being erroneously output to other lines.

A conventional facsimile answering device receives a facsimile image signal in the character code information area from a host device, converts the code information into a character stamp, and then performs facsimile encoding; Converts the format, etc. Thereafter, the procedure is carried out with the facsimile terminal connected to the line, and zero or more operations of outputting the above-mentioned image signals are performed by multiplexing over a plurality of lines.

Problems to be Solved by the Invention The above-mentioned facsimile response device is composed of firmware, and a microcomputer controls each part within the device according to a built-in program.

Such a facsimile response device is connected to a host device via a bus such as GPIB, and through this bus, control data, image signal data, etc. are exchanged.For example, the image signal data received from the host device is sent directly to the facsimile terminal. In this case, the facsimile response device receives data in blocks of a certain size (for example, 8 bytes) from the host device via the bus.

This data is temporarily stored in a buffer memory allocated to each line on the internal memory of the device.

Thereafter, the facsimile terminal control section performs procedures with the facsimile terminal, and then reads out the data in the buffer and outputs it to the facsimile terminal.

The above-mentioned buffer is normally allocated in the system memory by dividing addresses into lines. Therefore, if you accidentally store data in the buffer of another line when receiving data from a host device, or read data from the buffer of another line when outputting to a facsimile terminal, the facsimile screen of the contents of the other line may will be output as is, resulting in a serious service problem.

The present invention has been made in view of the above-mentioned conventional situation,
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a new facsimile response device that solves the above-mentioned problems inherent in the conventional technology and can prevent erroneous output of data from other lines.

Means for Solving the Problems In order to achieve the above objects, the facsimile response device according to the present invention includes a high-level interface section for exchanging data between a buffer memory within the device and a high-level device, and a buffer memory and a facsimile terminal. A part that accesses the buffer memory, such as a facsimile terminal control unit that sends and receives data between machines, is equipped with an exclusive OR circuit to perform an exclusive OR with the line number on the data sent and received in the buffer memory. configured.

Embodiment Next, a preferred embodiment of the present invention will be specifically explained with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention.

Referring to FIG. 1, one embodiment of the facsimile response device according to the present invention includes a high-level interface unit 1 equipped with an exclusive OR circuit, buffers (#0 to #n) 2 to 4,
It is provided with facsimile terminal control units <#θ to #n> 5 to 7 each having an exclusive OR circuit.

The facsimile response device receives image signal data from the host device through the host interface section l. At this time,
The upper-level interface unit l, which has a built-in exclusive OR circuit, performs an exclusive OR with the line number for each byte of received data, and stores buffers 2 to 4 corresponding to the line.
Store data in .

When outputting the data in the corresponding buffer to the facsimile terminal, the facsimile terminal controllers 5 to 7 first perform procedures with the facsimile terminal, read and compare the data in the buffer, and transmit the data to the facsimile terminal. Here, facsimile terminal control units 5 to 7 each having an exclusive OR circuit.
performs a 4-alternative OR with the line number for each byte of read data, as was done when storing the data in the buffer, and then sends the data to the facsimile terminal.

FIG. 2 shows an example of the processing at the time of buffer storage and reading described above.

As described in detail, according to the facsimile response device of the present invention, when data received from a higher level is stored in a buffer corresponding to a line, an exclusive OR of the data and the line number is performed,
By performing the same process when reading data from the buffer, even if data is read from the buffer of another line by mistake, the correct data will not be obtained and a screen that can be correctly recognized will be output to the facsimile terminal. This eliminates the problem of erroneous output of data from other lines.

[Brief explanation of the drawing]

FIG. 1 is a block 111I diagram showing one embodiment of a facsimile answering device according to the present invention. 1- IT host device interface section, 2~・1...
Line χ・↑corresponding buffer memory, 5~. 7...Line compatible facsimile control unit Figure 2 shows the data Ha! Figure 5 shows an example of processing when storing and reading 7A.

Claims (2)

[Claims] (1) It takes a facsimile image signal as input, has a facsimile terminal control circuit and a control circuit that controls it, converts the encoding method of the facsimile image signal as necessary, and outputs it to the facsimile terminal over multiple lines. A facsimile response device that performs multiplexing, including a host device interface section that sends and receives data between a buffer memory in the device and a host device, and a facsimile terminal control section that sends and receives data between the buffer memory and a facsimile terminal. A portion of the device that accesses the buffer memory is characterized by having an exclusive OR circuit that receives image signal data and a line number of the data as input and performs an exclusive OR of the input line number and image signal data. facsimile answering device. (2) The facsimile response device according to claim (1), further characterized in that the exclusive OR circuit is built in the upper-level device interface section and each of the facsimile terminal control sections.