JPH0690253A - Communication controller - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a communication control device that automatically transfers data to a device that receives a proxy when the device of the data transmission destination cannot receive the data. [Structure] 101 is a control means for controlling the entire processing associated with data transmission and data reception, 102 is a data receiving means for receiving data, 103 is a data saving means for saving data, and 104 is another data on the network. Data transmission means for transmitting to the device, 105 is a transmission possibility determination means for determining whether or not the destination device can receive the data, and 106 is an address of the transmission destination device and an address of the device which receives the data by proxy when this cannot be received. Data is stored in association with each other, and a data transfer means is provided for transferring data to the substitute reception address when the device of the original transmission destination cannot receive the data. [Effect] The efficiency of data transmission work is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication control device, and more particularly to a data transfer control device between devices connected to a network.

[0002]

2. Description of the Related Art In recent years, with the progress of network technology,
A technique of exchanging data such as electronic mail between devices connected to a network is widely used. An example of this communication control device will be described below with reference to the drawings. FIG. 4 shows the configuration of a communication control device according to this conventional technique. In the figure, reference numeral 401 is a control means for recognizing various data transmission requests and data reception notifications and processing the entire data transmission / reception. Reference numeral 402 is a data receiving means for receiving the transmitted data. A data storage unit 403 temporarily stores the received data. 40
Reference numeral 4 is a data transmission means for transmitting data based on management information such as an address of a device to which the transmission data is transmitted.

The operation of the communication control device configured as described above will be described below. The control unit 401 determines a data transmission request and a data reception notification. Then, in the case of the data reception notification, the data receiving means 402 is activated. Then, the data receiving means 402 receives the data. The data receiving means 402 activates the data storing means 403 at the same time when the receiving work is started to temporarily store the received data contents and management information.

The data storage means 403 additionally stores the data content to be temporarily stored at the end of the entry in the data storage area. In the case of a data transmission request from the user, the data transmission means 404 is activated. Data transmission means 404
Transmits the data to the address of the transmission destination device based on the management information of the transmission data. Note that the address here is an identification code that identifies the destination and destination devices,
It corresponds to a telephone number or a facsimile number in a telephone or a facsimile machine. However, the present invention is not limited to telephones and facsimiles and is intended for a broader concept of electronic mail, and thus is not limited to a string of numbers and includes characters, symbols and the like.

[0005]

However, in such a communication control device, whether or not data can be transmitted by the sender depends on whether or not this process is successfully transmitted after the line connection process for actual transmission is performed. On the contrary, by checking the signal from the transmission destination indicating that the transmission destination cannot be received because the transmission destination is just receiving etc. because the line connection with the transmission destination cannot be established within the predetermined time. It is judged for the first time.

Therefore, in order to know whether or not the transmission is actually performed, the sender needs to actually perform the transmission work. Further, if the transmission is impossible, it is necessary to perform the transmission work separately. Furthermore, if a large business establishment is equipped with multiple receiving devices, even if devices other than the original destination address can be received, as long as they do not perform transmission work to those devices that can receive the data again. I can't send. And in this case, when each company starts communication at the end of lunch break etc. or the communication line is congested due to an accident such as an earthquake, even if it is possible to acquire a communication line to a business office with a large destination, If transmission to the device having the original destination address is impossible, the connection itself of the communication line is automatically cut off, so that a situation may occur in which transmission is impossible until the connection itself of the communication line is newly acquired. For this reason, not only the efficiency of the transmission work itself is lowered, but also the efficiency of the work such as information processing that the sender is originally engaged in is reduced.

In view of the above problems, the present invention has been made for the purpose of providing an extremely convenient communication control device capable of effectively performing data communication even if a device that receives data cannot receive the data. Is.

[0008]

In order to achieve the above object, in the invention of claim 1, the entire communication process is performed by determining the data transmission request and the data reception notification and controlling the necessary operation of each device. Communication having a control means for controlling the message, a data receiving means for receiving message data composed of a transmission destination address, a transmission source address, and original transmission data, and a data transmission means for transmitting the message data to the transmission destination address. In the control device, a transmission permission / inhibition determining unit that determines whether or not the device of the transmission destination address can receive the data, a correspondence table of the address of the device of the original transmission destination and the address of the device that is received by the proxy when the device is unreceivable The proxy receiving address information indicating that the device of the original transmission destination cannot be received by the notification from the transmission permission / inhibition determination means. Is a communication control apparatus characterized by having a data transfer means for instructing said data transmission means to transfer the message data to the address of the proxy receiving device when.

According to the second aspect of the present invention, transfer permission / inhibition information storage means for determining whether or not transfer is possible to the proxy receiving device by a predetermined procedure or storing information about transfer permission / inhibition, and the device of the original transmission destination are data In the case of unreceivable, to the address of the proxy receiving device only when the transfer to the proxy receiver is enabled based on the information on the transfer availability of the message data from the transfer availability information storage means. 3. A transfer permission / inhibition determining means for instructing the data transfer means to transfer the data.
The communication control device is described.

According to the third aspect of the present invention, the terminal is connected to an exchange that controls the exchange of a plurality of terminals that communicate with an external terminal through a communication line, as one of the terminals, and after determining a data transmission request and a data reception notification, Control means for controlling the entire communication process by controlling the necessary operation of the device,
In a communication control device having a data receiving means for receiving message data composed of a destination address, a source address, and original transmission text data, and a data transmitting means for similarly transmitting the message data to the destination address,
It has a reception possibility judgment means for judging whether data can be received, and proxy reception address information indicating the address of a device to be received by a proxy when the reception is impossible, and the reception is impossible due to the notification from the reception possibility judgment means. If it detects that there is a message transfer instruction means for instructing the exchange to transfer the message data that should be originally received to the address of the proxy receiving device, and when the device of the original destination address cannot receive. Is a communication control device characterized in that it has a proxy receiving means for proxy receiving under the instruction of the exchange which has received a notification to that effect from the device.

According to another aspect of the present invention, the control means for controlling the entire communication processing by determining the data transmission request and the data reception notification and controlling the necessary operation of each device, the destination address and the transmission. Communication having data receiving means for receiving message data composed of original address and original transmission data, data transmitting means for transmitting message data to destination address, and received data storing means for storing received message data In the control device, the received message data received by the control device as a proxy receiving device and a reception data judging means for judging whether the message data received by the device itself is the original destination or the proxy receiving device. In this case, a data resending instruction means for instructing resending this message data to the original destination Is a communication control apparatus characterized by having.

[0012] According to the invention of claim 5, there is provided a transfer notifying means for notifying the device of the message data source that the proxy received message data has been received by the original receiver. The communication control device according to claim 4 is used.

[0013]

With the above structure, in the invention of claim 1,
If the device that is the original data destination cannot receive the data, the data transfer unit that detects this from the information from the transmission permission / inhibition determination unit sends message data to the address of the proxy receiving device based on the built-in proxy reception information. Forward.

According to the second aspect of the present invention, when the transmission to the original destination is impossible, the transfer permission / inhibition information storage means sends information on the transfer permission / inhibition to the proxy receiving device to the data transfer means. The data transfer means transfers the message data only when the transfer to the proxy receiving device is possible. According to the third aspect of the invention, when the user is unable to receive, the notification of the receivability determining means that detects this is
The data transfer instructing means instructs the exchange to transfer the message data originally transmitted to itself to the address of the proxy receiving device which is stored in advance.

Further, under the instruction of the exchange, the proxy receiving means receives the message data transferred to itself by proxy. In the invention of claim 4, the reception data determination means of the device that has received the message data by proxy detects whether or not this message data is the proxy reception. And
If it is proxy reception, this message data is retransmitted to the original destination.

In the fifth aspect of the present invention, after the proxy-received message data is retransmitted to the original destination, the transfer notifying means notifies the original (first) source of this fact.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) An embodiment of the present invention will be described below with reference to the drawings. In the present embodiment, the technical text created by the operator referring to the display on the CRT by operating the keyboard or the like, which is composed of characters, symbols, expressions, etc., is created if the receiving side can receive it in the same format. It is an electronic mail device that transmits in the same format and lacks the ability to receive in the same format, or if it is a facsimile machine, it is encoded once as image information and then transmitted.

FIG. 1 is a block diagram of this embodiment. In the figure, 101 is a control means having a microcomputer (not shown) built therein, 102 is a data receiving means, 103 is a data storing means composed of a high-speed semiconductor memory, 104 is a data transmitting means, 105 is a transmission permission / inhibition determining means, and 106. Is a data transfer means. Further, 107 is a destination device, 10
Reference numeral 8 is a proxy receiving device, and 109 is a communication line. Note that the communication line 109 is shown as a separate line for transmission and reception for convenience of understanding of the present invention, but it is actually a single line.

In addition to the above, the communication protocol necessary for performing communication processing according to the present invention as well as normal transmission / reception (for example,
CCITT30 for fax machines such as the International Telegraph and Telephone Consultative Committee, R for other e-mails
FC821, etc.) and ROM for storing basic programs,
A RAM for temporarily storing message data to be transmitted, an NCU for connecting to a public communication line, an auto dialer for dial reception, a modulation / demodulation device, and further, an operator to perform transmission work and register a substitute reception address. It has a CRT, a keyboard, a printing means, a storage device for a floppy disk, a clock with a calendar, etc., which are necessary not only for the direct operation but also for the original operation as an information processing apparatus. However, these are not shown because they are obvious techniques and facts and are not directly related to the gist of the present invention.

Furthermore, the source and destination addresses are added to the original transmission data, the work of confirming whether or not the transmission is possible between the source and destination devices, and the transmitted message data. The constituent elements of the communication processing according to the present invention, such as reading the original transmission destination, the constituent requirements, and the processing that is the prerequisite are not only ordinary facsimile machines but also cell communication, ISDN and cellular telephones. It is a technology that has been adopted even in extremely everyday equipment.

For example, the transmission destination address and the transmission source address in the message data can be electromagnetically recognized by adding a predetermined identification signal and storage position information according to the communication protocol. More specifically, for example, a symbol similar to [] in a patent application using an electronic information processing system or EOL in facsimile transmission / reception
It is a well-known technique that is widely adopted such as signals and multi-page signals. For details on facsimile transmission / reception, refer to Yasuhiko Yasuda, "Basics and Applications of New Facsimile," published by The Institute of Electronics and Communication Engineers, especially Chapter 6. Therefore, their description is also omitted. And these things are the same also in other Examples.

The operation of this embodiment will be described below with reference to FIG. The control means 101 determines the type of data transmission request and data reception notification. In the case of the data reception notification, the data reception means 102 is activated and the data reception means 102 is activated.
Receives the sent message data. The data receiving means 102 stores the message data received at the same time when the data receiving means 102 starts the receiving operation so as to temporarily store the received message data.
Start 3. The data storage unit 103 additionally stores the content of the received data in the entry at the end of the temporary storage area of the data.

In the case of a data transmission request from the user, the data transmission means 104 is activated. The data transmission unit 104 sends the transmission address of the message data to the transmission permission / inhibition determination unit 105, and the transmission destination device 107 (called terminal).
Inquires whether or not can be received. Transmission availability determination means 1
Reference numeral 05 denotes communication between the called terminal identification signal, the standard function identification signal, and the calling terminal identification signal according to the communication protocol with the device 107 of the received address, and the size, density, and accuracy of the image transmitted by the calling side device. Whether or not transmission is possible is performed after transmission of information regarding the reception of information, transmission of a signal indicating acceptance / rejection after confirming the image forming capability of the destination device 107, memory capacity, presence / absence of recording paper, and the like. Then, if transmission is possible, the encoded message data is transmitted together with the EOL signal and the MPS signal while the line connection is maintained. If the transmission is impossible or the communication is impossible because the communication line itself is not connected, the data transfer means 10
Start 6. As conceptually shown in FIG. 5, the data transfer means 106 receives the address 501 of the transmission destination device registered in advance by the operator and the data on behalf of the device when the device cannot receive the data. The device has the proxy reception address information consisting of the address 502 of the device to which the data is to be transferred. Transfer to 108. (In FIG. 5, a plurality of proxy receiving addresses are registered in order of priority in some of the sending addresses.) (Second Embodiment) Next, an embodiment of the invention of claim 2 will be described. Will be described with reference to.

FIG. 2 is a block diagram of this embodiment. In the figure, 201 is control means, 202 is data reception means,
203 is a data storage means, 204 is a data transmission means, 2
Reference numeral 05 is a transmission permission / inhibition determining means and 206 is a data transfer means, which are the same as those in the first embodiment. The difference from the first embodiment is that, as shown in FIG. 5, transfer permission information 503 indicating whether transfer of message data to a proxy receiving device is possible or not is stored, and whether transfer of message data is possible is determined by this information. The point is to have a transfer permission / inhibition determination means 207 for instructing transfer to the proxy reception address only when transfer is possible. In this case, the transfer availability determination unit 20
In the present embodiment, the transfer permission / denial information is stored in No. 7 by the installer (sender) of this communication control device registering in advance by a separate operation. This is done, for example, by the sender, who has been notified by the customer of the summer holidays at all business establishments, deactivates the search for the address of the proxy receiving device for the address of the device of the customer during the period. .

The operation of the communication control device configured as described above will be described below. The data receiving operation is the same as in the first embodiment. In the case of a data transmission request from the user, the data transmission means 204 is activated. The data transmission means 204 sends the transmission address of the message data to the transmission permission / inhibition determination means 205, and inquires whether or not the transmission destination device can receive. The transmission permission / inhibition determination unit 205 determines the reception permission / inhibition of the device of the received address, and if reception is possible, restarts the data transmission unit 204 and transmits the data. If it cannot be received, the transfer permission / inhibition determination means 207 is activated. The transfer availability determination unit 207
Whether or not the transfer to the proxy receiving device is possible is determined using the transfer availability information that is held, and if the transfer is possible, the data transfer means 2
Start 06. The data transfer unit 206 obtains the address of the device of the data transfer destination from the proxy reception information including the address of the device that cannot receive the data and the address of the device that receives the data by proxy, and transfers the message data to the address. If the transfer possibility determination unit 207 determines that the transfer is impossible or the transfer is impossible because the proxy receiving device address is not registered, the data transmitting unit is notified that the data transfer is impossible. (Third Embodiment) Next, the invention of claim 3 will be described.

Reference numerals 600a and 600b in FIG. 6 are communication control devices according to the present invention, which are installed in the same business.
In the figure, reference numerals 601a and 601b denote reception availability determination means,
Reference numerals 602a and 602b denote data transfer instruction means, and 603a and 603a.
Reference numeral 603b is a proxy receiving unit, 604 is an exchange, and 605 is a communication line communicating with an external terminal. Note that the communication control devices 600a and 600b also include a control unit, a data receiving unit,
Although it is also equipped with data transmission means, RAM, ROM, NCU, etc., these are not shown because they are self-evident and do not directly relate to the gist of the invention of this claim. Now, it is assumed that the communication control device 600a has transmitted message data from outside the business office, but this device is already receiving message data from a third party, and therefore cannot receive the message data. In this case, the transmission propriety determination unit 601a, which has detected that it cannot receive, notifies the data transfer instruction unit 602a of itself, not the transmission destination terminal. Upon receiving this notification, the data transfer instructing means 602a keeps holding the connection request for the external communication line from the new destination,
The exchange 604 is so arranged as to connect this connection request to the pre-registered proxy receiving device 600b and then connect.
Give instructions to. At this time, a frequency different from the frequency used separately for communication with the exchange 604 and currently used for reception of transmission from a third party is used, and the exchange 60 is used.
Use the line connected to 4. Upon receiving this instruction, the exchange 604 holds the connection request for a new communication line from the outside, and determines the connection destination in the office as the communication control device 6.
Switch from 00a to the communication control device 600b. Then, the proxy receiving means 603b in the proxy receiving device 600b
However, under the instruction of the exchange 604, the message data newly transmitted from the outside is received on behalf of the 600a. At this time, by the proxy receiving device 600b,
The transmission and reception of a predetermined signal according to the communication protocol prior to the reception of the message data with the device of the transmission destination is performed by misrepresenting the original transmission destination 600a. (Fourth Embodiment) Next, an embodiment of the invention of claim 4 and the invention of claim 5 will be described with reference to the drawings. FIG. 3 is a configuration diagram of this embodiment. In the figure, 301 is a control means, 302 is a data receiving means, 303 is a data storing means, 304 is a data transmitting means, 305 is a transmission permission / inhibition determining means, and 306 is a data transferring means.
And the same as the second embodiment. However, a reception data determination unit 307 that determines whether the received message data has been sent to itself as the original transmission destination or has been transmitted as proxy reception data because the original transmission destination cannot receive the message data. If it is received by proxy, it is re-transferred with the data re-sending instruction means 308 that periodically gives an instruction of re-transferring this message data to the original destination under the action of the built-in timing means (not shown). The difference is that a data transfer notifying means 309 is added to notify the original (original) source device of the message data that the message data was received at the original destination.

The operation of the present embodiment configured as described above will be described below. The control unit 301 determines the type of data transmission request and data reception notification. In the case of the data reception notification, the data receiving means 302 is activated, and the data receiving means 302 receives the message data. The data receiving unit 302 stores the received message data in the temporary storage. The data storage means 303 adds the contents of the temporary storage to the end of the entry of the data storage area,
Then, the reception data determination means 307 is activated. The reception data determination means 307 determines whether the received message data is sent to itself as the original transmission destination or is transmitted as the proxy reception data according to the communication protocol in the message data. It is determined by reading from the address of the transmission destination device marked with and comparing it with its own address. If the received message data is sent as proxy reception data, the data resend instruction means 308 is activated. The data resending instruction unit 308 periodically activates the data sending unit 304 to resend the temporarily stored message data to the original destination. Then, when the device of the original transmission destination becomes receivable, after confirming the receivability by communication according to the communication protocol with the device, the proxy-received message data is transferred. After the completion of this transfer process, the data transfer notifying means 309 notifies the source device that the message data received by proxy has been transmitted to the original destination. The address of the source device is read from the message data in the same manner as the address of the destination device.

The data transmission process in this embodiment is the same as that in the first embodiment except that the data transmission means 304 is activated not only by the control means 301 but also by the data retransmission instruction means 308. is there. As described above, in the present embodiment, when the original destination of the data becomes receivable, the proxy receiving device can automatically retransfer the data to the original destination, and further The sender can be automatically notified that the data has been retransmitted to the destination.

Although the present invention has been described above based on the embodiments, it goes without saying that the present invention is not limited to the above embodiments. That is, the following is also included in the present invention. According to the first aspect of the present invention, it does not have the received data storage means because it has the received data storage means for temporarily storing the received mail or only visually displays the received mail by printing or the like. . Alternatively, it has both temporary storage means and visual display means.

According to the first aspect of the present invention, the fact that proxy reception is used for displaying on the CRT of the device that received the proxy, printing by the printing means, and the original destination address call the attention of the operator of the proxy receiving device. It has the function of adding in the form. In the invention of claim 1, the data to be transmitted is personnel,
This is an important content such as a business report. Therefore, when there is a strong request for confidential transmission, a function is added to prevent proxy transmission to the proxy receiving device under a separate operation of the sender.

In the embodiment of the invention of claim 2, it is explained that the content of the transfer permission / inhibition judgment information storage means is due to the storage of the transfer permission / inhibition information, and the registration reason is due to the simultaneous suspension of the transmission destination. The reason for the determination depends on the processing capability of the received information of the device of the proxy transmission destination. Therefore, the nature of the data to be transmitted (image coarseness,
Whether or not transfer is possible is automatically determined by the size of the screen, whether it is a still image or a moving image.

In the invention of claim 3, each communication control device (terminal) has a built-in exchange and is directly connected to an external communication line. In the embodiment of the invention of claim 4, the resend instruction is made periodically under the action of the built-in timing means. However, if the person himself / herself is making or receiving a call at that time, the resend instruction is given. Is added after the work is completed.

In the invention of claim 4, when transferring the proxy-received data to the original destination, the address of the proxy-received device is also added, and the storage of the proxy-received data is automatically erased at the end of the transfer. The functions such as RU are added. In the invention of claim 5, the fact that the intermediate proxy receiving device has transferred is notified to the original sender, but the original receiver also has a function of notifying the original sender of this separately. ing. Further, the transmission data, which was temporarily stored at the transmission source for transmission, is automatically deleted after receiving these notifications.

In the fifth aspect of the invention, when the transfer to the original destination is impossible within a predetermined time, a function of notifying the sender of the fact is added.

[0035]

As described above, according to the first aspect of the invention, the proxy receiving device can receive the data when the device of the original transmission destination cannot receive the data. As a result, the efficiency of the transmission work can be directly achieved, and the efficiency of the sender's original work can be indirectly achieved. According to the invention of claim 2, in addition to the invention of claim 1, the sender can further specify whether or not to transfer the data to the proxy receiving device. As a result, claim 1 can be applied to the transmission data and the individual circumstances of the transmission destination.
The invention can be dealt with flexibly.

According to the invention of claim 3, even if the source device does not have the transmission capability to the proxy receiver according to the invention of claim 1, it is possible to effectively utilize the device by proxy reception within the same office. In addition, it becomes easy for the sender to acquire a transmission line for transmission. According to the invention of claim 4, when the original destination of the data becomes receivable, the re-transfer is automatically performed instead of the original sender. As a result, the effect of the invention of claim 1 is increased, and when the proxy receiving device address is the same office, it becomes possible to deal with the congestion of the external communication line.

According to the invention of claim 5, in addition to the effect of the invention of claim 4, the sender can be automatically notified that the data has been retransferred to the original destination. As a result, the original caller can easily confirm the transmission.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of a communication control apparatus according to the inventions of claims 1 and 3. FIG.

FIG. 2 is a configuration diagram of an embodiment of a communication control device according to the invention of claim 2;

FIG. 3 is a configuration diagram of an embodiment of a communication control device according to the invention of claim 4 and the invention of claim 5;

FIG. 4 is a configuration diagram of a communication control device according to a conventional technique.

FIG. 5 is a conceptual diagram of transfer permission / inhibition information in the invention of claim 2;

FIG. 6 is a configuration diagram of an embodiment of a communication control device according to the invention of claim 3;

[Explanation of symbols]

 101, 201, 301 Control means 102, 202, 302 Data reception means 103, 203, 303 Data storage means 104, 204, 304 Data transmission means 105, 205, 305 Transmission availability determination means 106, 206, 306 Data transfer means 107a, 107b Communication control device (Claim 3) 107 Destination device 108 Proxy receiving device 109 Communication line 207 Transferability determining means 307 Received data determining means 308 Data resending instruction means 309 Data transfer notifying means 501 Address of destination device 502 Proxy receiving destination Device address 503 Transfer availability information 600a, 600b Communication control device (Claim 3) 601a, 601b Reception availability determination means 602a, 602b Data transfer instruction means 603a, 603b Proxy reception means 604 Exchange 605 Communication times

Continuation of the front page (51) Int.Cl. ⁵ Identification number Office reference number FI Technical display location H04M 3/42 Z H04N 1/00 104 B 7046-5C 1/32 J 2109-5C

Claims (5)

[Claims] 1. A control means for controlling the entire communication processing by determining a data transmission request and a data reception notification and controlling necessary operations of each device, a destination address, a source address and an original transmission. In a communication control device having a data receiving means for receiving message data composed of textual data and a data transmitting means for transmitting the message data to a destination address as well, it is possible to determine whether or not the device at the destination address can receive the data. It has a judging means and proxy reception address information indicating the correspondence between the address of the device of the original transmission destination and the address of the device to be received by the proxy when the device cannot receive, by the notification from the transmission propriety judging means. When it detects that the original destination device cannot receive, it transfers the message data to the address of the proxy receiving device. Communication control apparatus characterized by having a data transfer means for instructing said data transmission means. 2. A transfer availability determination information storage means for determining whether transfer to a proxy receiving device is possible by a predetermined procedure or storing information about transfer availability, and when the device of the original transmission destination cannot receive data. , It is possible to transfer to the proxy receiver based on the information or the information from the transmission permission / inhibition determination means, and based on the determination or the information on the transmission permission / inhibition of the message data from the transfer permission / inhibition determination information storage means. 2. The communication control apparatus according to claim 1, further comprising a transfer permission / inhibition determining unit for instructing the data transfer unit to transfer to the address of the proxy receiving device only when the transmission is in progress. 3. An external terminal is connected as a terminal to an exchange that controls the exchange of a plurality of terminals that communicate with each other through a communication line, and after determining a data transmission request and a data reception notification, the necessary operation of each device is confirmed. Control means for controlling the entire communication process by controlling, data receiving means for receiving message data consisting of a destination address, a source address, and data that is the original transmission text, and also sending message data to the destination address In the communication control device having the data transmission means, the reception possibility determination means for determining whether or not the data reception is possible, and the proxy reception address information indicating the address of the device to be received by the proxy when the own terminal cannot receive the data are included. When it is detected that the data cannot be received by the notification from the receivability judging means, the message data to be originally received is displayed. Under the instruction of the exchange, the data transfer instructing means for instructing the exchange to transfer to the address of the proxy receiving device and the instruction of the exchange receiving the notification from the device when the device of the original destination address cannot receive A communication control device, comprising: a proxy receiving means for receiving by proxy. 4. A control means for controlling the entire communication processing by determining a data transmission request and a data reception notification and controlling necessary operations of each device, a destination address, a source address and the original transmission. In a communication control device having data receiving means for receiving message data composed of sentence data, data transmitting means for similarly transmitting message data to a destination address, and received data storing means for storing received message data, Received data determination means for determining whether the received message data was originally sent to itself or sent as a proxy receiving device, and this message when received as a proxy receiving device. And a data resending instruction means for instructing the data sending means to resend the data to the original destination A communication control apparatus according to claim and. 5. The communication according to claim 4, further comprising transfer notifying means for notifying a device of a message data source that the proxy-received message data has been received by an original receiver. Control device.