JPS6023536B2 - On-premises fax system - Google Patents

Description

Detailed Description of the Invention The present invention involves connecting a high-speed digital line (4 bits or more) to a private branch exchange facility, installing a plurality of facsimile machines in the premises, and installing a device for accumulating and controlling facsimile image signals. The present invention relates to a system that uses a simple facsimile machine and effectively uses a high-speed digital line.

An example of a conventional in-house facsimile system is shown in FIG. When the facsimile device 1 (la, lb) is connected to the in-house telephone line and communicates with other facsimile devices within the machine or via the general telephone line, the telephone 2 is used to communicate with the in-house communication machine 3 and even the central office communication. The facsimile machine is activated, calls the other party, and then switches to the facsimile machine 1 for communication.
Therefore, in the case of high-speed facsimile communication, each facsimile transmitter la includes a bond number reading section 11, a sub-scanning interlude control 12, an image signal compression section 13, a digital modulation section 14, and a telephone line switching section. Each facsimile receiver lb has a digital modulator section 16, an image signal expansion decoder section 17, and a control section 15.
A sub-scan interlude control 12, an image signal print fixing section 18, a telephone line switching control section 15, etc. are required. Therefore, these facsimile machines 1 are quite expensive, and if the function of the other party's digital modem is slightly different or the information compression method is different, mutual communication becomes impossible. In addition, when performing broadcast communication to multiple parties, a device for storing and reproducing the box signal once is installed as shown at 4 in Fig. 1, and the output of the modulator 14 of the transmitter la is stored once. , this has to be played back and transmitted after connecting to the other party, which becomes expensive. The present invention has been made to solve these drawbacks, and involves introducing a high-speed digital line of 4 bits or more into the premises, using this line to connect to similar premises equipment of the other party, and installing a facsimile machine within the premises. A storage control device for the image signals necessary for sending or receiving calls is installed, and all facsimile communications go through this storage control device to communicate with the other party at high speed. Information compression is used between the facsimile transmitter and receiver. It is characterized by communicating at a constant speed, and its purpose is to economize on multiple installed facsimile groups and to economize on communication charges, which will be explained in detail below. As mentioned above, the present invention
A high-speed digital line with a speed higher than Hinabit is used, and the overall configuration of the network is shown in Figure 2. In the same figure, 5
is a high-speed digital line, which is a four-way bit switched network or dedicated line (hereinafter referred to as high-speed line network). Further, 6 is a terminal device for controlling this, which includes a connection control function of the high-speed line network 5, and 7 connected to this is a storage control device necessary for the present invention, which is used for normal in-flight automatic switching. It is housed in several aircraft 3. Furthermore, numerals 8 and 9 are the transmitter and receiver of the simplified facsimile machine OX (referred to as simple fax) necessary for the present invention, which is composed only of extremely simple parts such as an image reading section or an image printing section and an operation section. ing. FIG. 3 is a diagram showing a first embodiment of the storage control device 7 of the present invention, in which four sets of simple fax transmitters 8 and four sets of simple fax receivers 9 are connected, and the transmitter 8
Two sets of buffer memories are provided for one line each of the original image information, and after one line has been accumulated, the necessary information is compressed and each line is written in a large capacity memo such as a disk memory. These steps are performed one after another, and when one page of compressed image information is stored in the large capacity memory, it is sent out to the high-speed line network 5 whose connection is controlled in advance. Incoming calls are connected in the reverse order. A detailed explanation will be given below with reference to FIG. First, the case of receiving a call will be explained.

Reference numeral 711 is a byte buffer for reception, which is driven by a clock received from the termination device 6 via the lead 61.

This lead 61 is an IJ card for controlling the connection from the terminal device 6 to the high-speed line network 5. Further, a signal arriving at the private branch exchange 3 to control the connection is included in a several-byte designation section (hereinafter referred to as a header section) at the beginning of the box information, and the image information continues from this header section. The received image information is still compressed, but the microprocessor (hereinafter referred to as the microcomputer) 721 processes it according to instructions from the read-only memory and internal random access memory (hereinafter referred to as the internal memory), and sequentially processes the information. Random access memory (RAM)
)741. RAM741 is 12 & 2
It has two areas, and information is stored alternately in these areas. When 12 & 8 pieces of information is accumulated in one area, the write control circuit 751 is immediately driven, and the large capacity memory (hereinafter referred to as disk memory) 75 at a predetermined address. This disk memory 75 has separate write and output heads for reception and transmission, and can process transmission and reception in parallel. Also,
The disk memory 75 is not limited to an ordinary magnetic disk, but can be realized by any type of memory such as a collopy memory, a bubble memory, or a CCD (charge coupled device) memory. The above operation is repeated until image information for one page is accumulated in the disk memory 75. When the storage is completed, the subsequent processing is to read the contents of the disk memory 75 into the temporary memory 761 in 128-byte units under the control of the microcomputer 722 according to instructions from the internal memory 732, and decode the local line connection information from the header part. As a result, the private branch exchange 3
is connected to a predetermined simple facsimile receiver 9, and the information of the remaining header section is transmitted. For example, if the header section has a total of 10 bits, the rest is image information, and the microcontroller 7
22 checks the synchronization information, decodes the compressed information,
The information expanded to the original image information is stored in the buffer memory 771. The unit of this buffer memory 771 is one line, and two lines correspond to each simple fax transmitter 9.
Capacity for the line is allocated. Furthermore, although the stored content is complete original image information, if the receiver 9 uses a method other than electrostatic printing, for example, a thermal printing method, only the part of the matrix that has been printed in advance may be omitted. You can also do it. At the same time as the image information in the buffer memory 771 is sent to the receiver, a clock is passed through the clock distributor 781. By sending out the clock in common to all, the configuration of the receiver 9 is simplified. The speed of the clock varies depending on the printing method, and is set to a speed that allows printing and does not fall below the minimum time of the transmitter 8. In addition, temporary memory 761
is provided for each receiver 9 and decoded by the microcomputer 721.
When the disk processing is completed and the disk becomes empty, it is removed from the disk memory 75 again. Next, the operation for sending will be explained.

When an attempt is made to make a call from the transmitter 8, a loop of the exchange 3 is created and the call is automatically connected to the transmission route 32. Subsequently, when a dial is made from the simple facsimile transmitter 8, the dial is received and analyzed by the microcomputer 723 via the route 33. This analysis process is performed with the help of the internal memory 733, as described above, and as a result, if an external connection is requested, the destination address is encoded and the header section 1
Write within 6 bytes, and at the same time write your name, fax type, etc. in this header section. Next, image information is output from the simple fax transmitter 8. If the minimum accumulation time for one line is, for example, 10 seconds due to the characteristics of the sensor, image information for one line is output every low sec, so approximately The image signal speed is 100 to 20 b/s, so a clock pulse is commonly sent to each transmitter 8 via the microcomputer 723 and clock circuit 782, and in synchronization with this, the line synchronization signal and image information are transmitted. It is sent directly from the sensor circuit of the transmitter 8. This signal is transferred via route 32 to buffer memory 772 and stored therein. When the storage for one line is completed, it is converted into compressed information by the action of the microcomputer 723, and it is compressed into one line along with the first header part.
The time memo IJ762 is written at the appropriate location.

When the temporary memory 762 becomes full of 128 bytes, the data is immediately written to the disk memory 75. Disk memory 7
If one page's worth of image information and the header section are stored in 5, the information for 12 &
The information is written into M742, and the next 12&ite information is also written into another area. Here, RAM74
2 is horizontally formed in the same way as the RAM 741 described above. Further, according to an analysis instruction from the microcomputer 721, the header section is looked at and a signal is sent to the high-speed line network 5 via the route 61. If the check on the receiving side is OK, information is transmitted from the terminal device 6 via the byte buffer 712 under the control of the microcomputer 721. Also, if the connection request from the transmitter 8 is to another receiver 8 within the premises, the microcomputer 723 sends a connection request to the microcomputer 72.
2, the contents of the buffer memory 772 are transferred to the buffer memory 771, and under the control of the microcomputer 722, the receiver 9 of the desired incoming simple fax is called and the image information is sent out. If the same image information is to be sent to many other locations, the receiving destination should be determined in advance or the receiving number should be written in the header section.

The microcomputer 721 looks at the header section, reads data from the disk memory 75 one after another until all destinations are completed, and drives the terminal device 6 according to the normal transmission route. In addition, if it is necessary to send the same facsimile information to a certain area, the local center receives the broadcast information under the control of the microcomputer 721, and sends this information separately from general incoming messages to 12
The data is directly written from the RAM 741 of the &item through the write circuit 751 to not only the incoming part but also the outgoing part of the disk memory 75, and then a kind of relay exchange is performed as normal outgoing broadcast communication of the local center. Next, a simple fax applied to this method will be explained.

FIG. 4 is a block diagram showing an example of the transmitter 8,
In the figure, 81 is a mechanism for discussion, and the rotation of the drum is driven by a drive circuit 82 using a pulse motor or a constant speed motor. Reference numeral 83 denotes a line sensor including a readout lens, which is driven by a clock coming from the clock pulse distribution circuit 782 of the storage control device 7.

The output information of this line sensor 83 is detected by a detector 84 and sent to the in-flight communication station 3 as image information via a switching circuit 85. Reference numeral 86 denotes a dial used when this transmitter 8 makes a call, and at the same time operates the exchange 3, the dial 86 is sent to the microcomputer 88 as a signal to control the high-speed line network 5 from the termination device 6 via the conversion circuit 87. Create a header section.

881 is an internal memory of the microcomputer 88, and 89 is an operation button and a display lamp.

FIG. 5 is a block diagram showing an example of a simple fax receiver 9. When an incoming call is received, it is sent to the microcomputer 92 via the changeover switch 91 along with a synchronizing signal from the clock distribution circuit 781 of the storage control device 7. The header section and image section (information that has already been decoded and can be printed as is if received) arrive.

The microcomputer 92 analyzes the received header, adjusts the line density, image width, etc., and prints one line at a time while identifying the synchronization signal in the image information. Here, 921 is an internal memory of the microcomputer 92. FIG. 5 shows an example of thermal printing. Therefore, 93 represents a driver for one of the 32 mouse dots in the group, 94 represents a selection circuit for the group, and 95 represents a V-thermal head. Furthermore, when all of a group is white, it is common practice to add a signal of "1" or "0" to the head of the group information so that that group is skipped and printed. When the next synchronization is detected, the paper drive motor circuit 96 is driven to feed the print paper 97 by one line, and this is performed one after another. When requesting information from the receiver 9, the operation is as follows. Reference numeral 98 denotes an outgoing dial, and the dial information is transmitted to the microcomputer 92 via a conversion circuit 981, and a link to connection information is created.

Once the connection is completed, this circuit switches to the incoming call route via a header, and the rest is the same as normal incoming calls. Further, 99 is an operation button and a display lamp. As explained above, the present invention provides the following advantages: 4) installing a high-speed digital line of 4 or more speeds into an aircraft; Class b or 9. By connecting several high-speed facsimile lines with speeds corresponding to Iso B's line, line usage fees can be reduced, and expensive 9. Gundam b, 4. Eliminates the need for Koi b modem,
The transmitter and receiver of facsimile machines have been thoroughly simplified.
It is smaller and cheaper. In the first embodiment, a 4-b high-transmission line network was connected to the private branch exchange as a high-speed digital line, but as a modification of this system, 4
4. Not only for class B network but also for general telephone lines for destinations where the number of communications is not large. Thigh b or 9. Connect the modem on the side B and let the three microcontrollers shown in Figure 3 control all of them at the same time.
If the disk memory 41 is used, it is also possible to use it in combination with 4 axes and a line network.

Furthermore, if the frequency of use of the facsimile transmitter or receiver is relatively low, the buffer memories 45 and 46 may have memory for four sets, or four or more facsimile sets can be set. As explained above, the present invention is extremely effective when several or more high-speed facsimile machines (1 minute or less) are used in the same premises and the communication destinations cover various areas, and the transmitter and receiver thereof are small. , it is inexpensive, and line charges can also be significantly reduced. Brief Explanation of Figures Fig. 1 is a block diagram showing an example of a subordinate in-house facsimile system, Fig. 2 is a block diagram showing the overall configuration of the in-house facsimile system of the present invention, and Fig. 3 is an accumulation control of the present invention. FIGS. 4 and 5 are block diagrams showing an example of a simple fax transmitter and receiver of the present invention.

3...Yokonai switchboard, 5...High speed line network, 6...Terminal device, 7...Storage control device, 8...Simple fax transmitter, 9...Simple fax receiver, 721, 722, 7
23,88,92...Microcomputer, 741,742...RAM
, 75...Disk memory, 761,762...Temporary memory, 771,772. ．．・Buffer memory, 781,
782...Clock distribution circuit, 83...Line sensor,
93...Dot driver, 94...Selection circuit, 95...Thermal head.

Blind drawing Figure 2 *4 boxes Fin diagram 5 box n *

Claims (1)

[Claims] 1. A facsimile device consisting of a simple configuration of an image reading section, an image printing section, and an operation section and housed in multiple units in a private branch exchange;
A large-capacity memory for storing compressed data for one page of image information, a buffer memory for reading and writing data to the large-capacity memory, and a buffer memory for storing compressed data received from an off-premises line and stored in the large-capacity memory. Decompressing the original image information and transmitting it to the receiving section of the facsimile device via the buffer memory, compressing the original image information sent from the transmitting section of the facsimile device via the buffer memory, and storing it in the large capacity memory. a processor for transmitting original image information to an off-premises line and further transferring original image information between facsimile devices housed in the private branch exchange via the buffer memory; and a storage control unit for drawing the off-premises line into the private branch exchange. What is claimed is an on-premises facsimile system, characterized in that it is capable of communicating not only between on-premises and off-premises facsimile machines, but also between on-premises facsimile machines.