JPH0666996B2 - Button telephone device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention connects a communication terminal device such as an image terminal device and a data terminal device to a main device via a two-line communication line, and is housed in the main device. The present invention relates to a button telephone device for performing non-telephone communication with a station line.

[Conventional technology]

G1 and G
There are two or more types of communication modes according to CCITT recommendation such as 2, G3, and G1 facsimile is tired of G1 facsimile, G2 facsimile is tired of G2 facsimile, and so on. ing.

Similarly, in the case of a data terminal device that can convert character code data into image data, when transmitting the converted image data, the image data is sent only to a facsimile machine having the same communication mode as its own communication mode. Can be sent.

It has been possible to connect such a facsimile device or data terminal device to a key telephone device.

[Problems to be solved by the invention]

However, the conventional key telephone device can only connect the facsimile device and the data terminal device, and can communicate with the destination facsimile device having a communication mode different from the communication mode of the connected facsimile device or the data terminal device. It wasn't possible.

[Means for solving problems]

The key telephone device of the present invention has been made in view of the above problems, and includes a terminal communication unit that performs local communication in a predetermined data form with a communication terminal device such as an image terminal device or a data terminal device, and a local line. Station line communication unit for performing trunk communication of image data between the communication units, means for transmitting and receiving data between these communication units through the image data memory in the form of compressed image data, and image data to this image data memory Image data compression / decompression means for respectively compressing and decompressing image data based on the communication mode of the partner terminal device at the time of writing / reading, and between the terminal communication unit and the communication terminal device and the station based on predetermined conditions. It is provided with a line communication unit and a control means for controlling the connection between the line communication unit.

[Action]

The image data from the communication terminal device passes through the terminal communication unit, is compressed in the image data compression / decompression means as needed, and is temporarily stored in the image data memory. Thereafter, the compressed image data stored in the image data memory is read according to the communication mode of the partner terminal device and transmitted via the station line communication unit.

〔Example〕

 Hereinafter, the present invention will be described in detail with reference to Examples.

FIG. 1 is a block diagram showing an embodiment of the present invention. Key telephones 2a to 2c as slaves are connected to the main device 1, and a facsimile device 3 and data terminal devices 4a and 4b are further connected to the main device 1.

The office line interface units 5a to 5c are connected to the central office switch via subscriber lines 6a to 6c, respectively. These station line interface units 5a to 5c are analog
Through a network 7 composed of devices such as a cross point switch, the facsimile interface unit 8, the key telephone interface unit 9 and the communication mode conversion unit 10 are connected in correspondence with various states.

The facsimile interface unit 8 is CCITT G
This is a part for connecting a facsimile machine conforming to 1 to G3 through a two-line communication line, and interfaces with the facsimile machine 3 by a function substantially similar to the subscriber circuit of the central office switch. The key telephone interface unit 9 performs data transmission with the key telephones 2a to 2c and formation of a voice path. The communication mode conversion unit 10 is a block that converts the transmission mode, and the details of the internal configuration will be described later.

Each of these blocks is comprehensively controlled by the central control unit 11, and the main storage unit 12 is composed of a memory for the central control unit 11 and a RAM necessary for the system. It should be noted that the central control unit 11 includes, in addition to the main processor that controls the system, a clock device managed by the main processor.

Next, the communication mode conversion unit 10 will be described.

The modems 13a to 13c have CCITT and G3 transmission capabilities, respectively, and the asynchronous communication interface devices (ACIA) 14a to 14c connected to these modems 13a to 13c,
It is a means for mediating data with the controller 15. The modem 13a is for controlling transmission with the facsimile apparatus 3 connected to the facsimile interface unit 8 and for transmitting / receiving image data. Modems 13b, 13
c is used for transmission control from the station line interface units 5a to 5c via the public lines 6a to 6c and transmission / reception of image data.

The image compression / decompression-only processors 16a and 16b compress two types of data representing an image and encode the data in a G3 compatible manner.
On the contrary, the compressed data is expanded (decompressed) to the original two kinds of data. The two sets of compression / decompression processors 16a and 16b are randomly accessed by the controller 15. Image data RAM 17a, 17
b is used for temporary storage of compressed data.
The ROMs 20a and 20b are read-only memories for the compression / expansion dedicated processors 16a and 16b, respectively.

Data terminals 4a and 4b typified by personal computers and word processors are connected to the terminal control blocks 18a and 18b, respectively, to perform data transmission with the data terminals 4a and 4b and, if necessary, to send character data. To image data and image data to character data. Each of these terminal control blocks 18a and 18b includes a dedicated processor and is controlled by the controller 15.

The voice synthesizer 19 includes a facsimile device 3 and a data terminal 4.
It is used when it is necessary to send a voice message to limit the connection when a connection request from the outside occurs when a and 4b cannot be used.

Each unit in the communication mode conversion unit 10 described above is controlled by the processor in the controller 15. Further, the processor in the controller 15 controls the communication interfaces 14a to 14c to perform a transmission control procedure with respect to the facsimile. The controller 1
The processor in 5 is controlled by the central control unit 11.

Next, the operation of this embodiment thus constructed will be described with reference to the partial block diagrams of FIGS. 2 to 7.

2 and 3 show the basic operation of transmission mode conversion. In FIG. 2, the facsimile interface unit 8 is connected to the CCITT-recommended facsimile machines 3 of G1 and G2, and the facsimile machine 3 is shown in FIG. Uses a key telephone without connecting a single telephone. The image signal from the facsimile apparatus 3 is sent to the modem 13a in the communication mode conversion unit 10 without being sent directly to the public line by the key input data from the key telephone 2c. Under the control of the controller 15, the modem 13a transmits the image signal sent from the facsimile device 3 after the control transmission to and from the facsimile device 3 is completed.
Convert value to image data. The binary image data is encoded by the compression / decompression dedicated processor 16a and stored in the image data RAM 17a.

FIG. 3 shows the next operation. That is, it indicates that the image data stored in the image data RAM 17a by the above-described procedure is sent to the public line 6c through the station line interface unit 5c by key input from any of the key telephones 2a to 2c. In this case, the modem 13a, the interface 14b, and the controller 15 perform control transmission and the like with the facsimile device on the other side (reception side). The central line control unit 11 controls the central line control unit 11 to send out a local line acquisition dial and the like.

The dial telephone number of the receiving side facsimile device is keyed in from the key telephone 2a (2b, 2c) to complete the connection, and a key tone as a response signal is transmitted to the key telephone 2a.
After the reception at (2b, 2c), the transmission for control and the transmission of the image signal by the modem 13a, the interface 14b and the controller 15 are performed by a predetermined key input. At this time, if the facsimile apparatus on the receiving side is G3, the data stored in the image data RAM 17a is sent as it is, and if it is G1 or G2,
Decoding (decompression) by the compression / decompression processor 16a
And then send it out. As described above, according to the present embodiment, the transmission mode of image data can be appropriately converted according to the mode of the other party.

Further, when a call is once made by a key input from the key telephone 2a (2b, 2c) and the facsimile apparatus on the receiving side is busy, the key telephone 2a (2b, 2c) is automatically called at a predetermined interval. It is also possible to transmit after confirming the key tone using the speaker receiving function of).

The advantage of this embodiment is that, in addition to the variable transmission mode, the same image data can be retransmitted without being set in the facsimile apparatus 3 each time, or when the receiving side is busy. In addition, it is possible to issue a resend command from any key telephone.

Next, the same three-to-ground communication operation at the same time will be described with reference to FIG. That is, this figure shows that image signals are transmitted / received to / from one facsimile machine 3 simultaneously with three ground points A, B and C.
c is respectively connected to the ground A to C via a central office switch. The image signal transmitted from the ground A is directly received by the facsimile apparatus 3 from the office line interface unit 5a via the facsimile interface unit 7. The image signal transmitted from the ground B is the local line interface unit 5b.
Further, it is received via the modem 13b of the communication mode converter 10, encoded, and stored in the image data RAM 17a. For the transmission to the ground C, the image data stored in advance in the image data RAM 17b is transmitted by the same method as that described with reference to FIG. 2, and the key telephones 2a to 2c are used. The set transmission start time is managed by using the clock in the central control unit 11, and the transmission is performed when the set time arrives. In this case, the reception side response monitors the polarity reversal at the time of response at the station line interface unit 5c.

The image data received via the station line interface unit 5b is stored in the RAM 17a until the facsimile image signal reception through the station line interface unit 5a is completed. Facsimile device 3 from section 8
Start and send the stored data. in this case,
The transmission is performed using the modem 13a shown in FIG. Further, since the facsimile apparatus 3 is G1 and G2, the data to be transmitted is transmitted after the image data is decoded by the compression / decompression dedicated processor 16a. If the facsimile device 3 is G3, it is transmitted without being decrypted.

As described above, by using this key telephone device, it is possible to communicate with one facsimile device and three facsimile devices substantially at the same time, and to improve the use efficiency of the facsimile device 3. You can

Next, data communication (personal computer communication) between data terminals such as personal computers using a public line will be described with reference to FIG. The data terminal 4a uses the key telephone 2a, and the data terminal 4b uses the key telephone 2b.
Use to communicate. The connection to the other party is performed by a dial input from the key telephone set 2a or 2b and a predetermined operation necessary for capturing a local line. The analogization for outputting the digital data output by each data terminal 4a or 4b to the public line is performed by the modem 1 of the communication mode conversion unit 10.
3b and 13c are used. For baud rate settings,
Button telephones 2a, 2b or data terminals 4a, 4b
Enter by. Since the baud rate also serves as a modem for facsimile, the value within that range (for example, 0.3k,
2.4k, 4.8k, 7.2k, 9.6k per sec.). In this case also, the transmission is controlled by the controller 15.

FIG. 6 shows that the character data transmitted from the data terminal 4a is received by the terminal control block 18a, converted into image data, encoded by the compression / decompression processor 16a (data compression), and temporarily stored in the image data RAM 17a. The image data stored in the image data RAM 17a is transmitted after connecting to the receiving side facsimile via the station line interface unit 5c by operating the key telephone 2a. The dialing for connecting to the receiving side and the operation for capturing the office line can be performed by key-in from the data terminal 4a, but in this figure, a case where these operations are performed by key-in of the key telephone 2a is shown. The transmission is performed according to the communication mode of the facsimile machine on the other side. That is, since the communication mode conversion unit 10 has the capability of G3, it can be transmitted as G3.
In the case of, the processor 16a dedicated to compressing and expanding image data
Decrypt with and send.

FIG. 7 shows two personal computers 4a and 4b and one facsimile device 3 for the key telephone device.
It shows a composite operation when the are connected. The facsimile apparatus 3 transmits an image signal to the modem 13a via the facsimile interface unit 8. The image data received by the modem 13a is encoded by the compression / decompression dedicated processor 16a, and then the image data R
It is stored in the AM 17a. The personal computer 4a, which is a data terminal, uses the key telephone 2a to acquire a local line and dial in to access the public line network. As a procedure, the character code data of the personal computer 4a is transmitted to the terminal control block 18a in the communication mode conversion unit 10 in advance before accessing the public line, and the image data conversion of the character code data and the compression / decompression processor 16b are used. After encoding, R for image data
It is stored in the AM 17b. Access to the public circuit by the key telephone 2a is made after the above procedure is completed. The personal computer 4b uses the key telephone 2b to
Accessing the public line by capturing office lines and dialing in. The data transmitted by the personal computer 4b via the public line is the character code data modulated by the modem 13b, and is not an image signal. As for the image data (encoded data) from the facsimile apparatus 3 stored in the image data RAM 17a, the data transmission to the public line by the personal computer 4a or 4b is completed, and the modem 13b or 13c is empty (not in use). ), The modem 13b or 13
Send using c.

Other operations of the apparatus of this embodiment will be described.

When the facsimile device 3 connected to the facsimile interface unit 8 is unusable (for example, out of paper, repairing, power failure, etc.), image signal communication is impossible due to insufficient remaining storage capacity of the image RAM. In this case, by keying in as system data from the key telephones 2a to 2c, the voice synthesizing unit 1 can be used when receiving an incoming call from a public line or when requesting a temporary storage from a facsimile machine.
A voice message to that effect is transmitted from 9.

In addition, the image signal sent from the facsimile apparatus 3 is transferred to the image data RAM 17a in the communication mode converter 10,
The image signal R stored in the communication mode converter 10 is stored in the communication line converter 17b or when the image signal sent from the public line side is stored.
When the data is stored in the AMs 17a and 17b, how much capacity (for example, how many sheets in terms of A4, etc.) is left in the image data RAMs 17a and 17b becomes a problem. Therefore, in this embodiment, the remaining amount can be confirmed using the data terminals 4a and 4b connected to the terminal control blocks 18a and 18b.
If it is determined that the image data cannot be stored as a result of confirmation, an appropriate voice message can be issued by inputting system data corresponding to the voice message from the key telephone. ing.

Furthermore, when an incoming call for the facsimile apparatus 3 is generated by the station line interface unit 5b while the facsimile apparatus 3 is receiving the image signal directly by the station line interface unit 5a, the station line 6a and the station lines 6b, 6c are set to three. If the station line 6a is registered as a representative line of the line and the pilot line (representative number) is set as the dedicated line for the facsimile at that time, the station line 6 is set in the facsimile machine on the sending side.
By dialing the telephone number (subscriber number) corresponding to a, that is, the representative number, to the office line 6b when the office line 6a is in use, or to the office line 6c when the office lines 6a and 6b are in use. The station exchange automatically slips and receives the call. Therefore, when a facsimile is used by the station line 6a or the station line 6b, even if an incoming call request to the facsimile apparatus 3 is made from another destination, the station exchange side does not keep busy, and Receive a call on an available line.

〔The invention's effect〕

As described above, according to the button telephone device of the present invention,
The image data from the communication terminal device passes through the terminal communication unit, is compressed in the image data compression / expansion means as needed, and is temporarily stored in the image data memory.
After that, the compressed image data stored in the image data memory is read according to the communication mode of the partner terminal device and transmitted via the station line communication unit. It is possible to communicate with a partner terminal device having a communication mode different from the communication mode.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIGS. 2 to 7 are partial block diagrams for explaining the operation of the present embodiment. 1 ... Main device, 2a-2c ... Button telephone, 3 ... Facsimile device, 4a, 4b ... Data terminal, 5a-5
c ... station line interface section, 6a to 6c ... station line,
7 ... Network, 8 ... Facsimile interface section, 9 ... Button telephone interface section, 10
...... Communication mode conversion unit, 11 ...... Central control unit, 12 ......
Main storage unit, 13a to 13c ... Modem, 14a to 14c
... communication interface, 15 ... controller, 16a, 16b ... image compression / decompression processor, 17a, 17b ... image data RAM, 1
8a, 18b ... Terminal control block, 19 ... Voice synthesizer, 20a, 20b ... ROM, 21 ... RAM.

Claims (1)

[Claims] 1. A communication terminal device such as an image terminal device or a data terminal device having a plurality of communication modes is connected to a main device via a two-line communication line, and the communication terminal device is a station via the main device. In a button telephone device for performing image communication with a line, a terminal communication unit for performing local communication with the communication terminal device in a predetermined data form, and a station line communication unit for performing trunk communication of image data with a station line And means for performing data transfer between these communication units via the image data memory in the form of compressed image data, and a communication mode of the partner terminal device at the time of writing / reading the image data to / from the image data memory. Image data compression / decompression means for respectively performing compression and decompression based on a predetermined condition, and between the terminal communication unit and the communication terminal device and the local line communication unit based on a predetermined condition. Key telephone system comprising a control means for performing connection control between Tsu bets and the station line.