JPH07107120A - Communication server - Google Patents

Abstract

PURPOSE:To transmit data to a destination data terminal, even if a sender does not know terminal discriminating information and an LAN address of each data terminal equipment on an incoming side LAN. CONSTITUTION:Plural LANs 7, 8 are connected through a public network 9, and between each LAN and the public network 9, communication servers such as facsimile servers 1, 5, etc., are provided so that a communication can be conducted between data terminal equipments 2-4, and 6 on different LANs. In the facsimile server 1, a corresponding table for showing a corresponding relation of terminal discriminating information and an LAN address of data terminal equipments 2-4 connected onto the LAN 7 is held. When the facsimile server 5 transmits data to the data terminal equipment 2, the facsimile server 5 allows the incoming side facsimile server 1 to transmit the corresponding table, inputs the terminal discriminating information of the data terminal equipment 2, while referring to its table, and designates a transmitting destination.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is arranged between a LAN (local area network) and a public network to provide a LAN.
Between the above data terminal equipment and the terminal on the public network, or
The present invention relates to a communication server such as a facsimile server that enables mutual communication with a data terminal device on another LAN connected via a public network.

[0002]

2. Description of the Related Art FIG. 15 is a block diagram showing an outline of a network including a facsimile server. In FIG. 15, 1 and 3 are facsimile servers, 2 and 4 to 6 are data terminal devices, 7 and 8 are LANs, and 9 is a public network.
In such a network, for example, when transmitting data from the facsimile server 1 to the data terminal device 2, first, the facsimile server 1 transmits the data to the facsimile server 3 via the public network 9 and the data terminal device 2 of the transmission destination. Send with terminal identification information. On the other hand, the facsimile server 3 holds a correspondence table showing the correspondence between the terminal identification information (department name, workstation name, etc.) of each of the data terminal devices 2 to 4 connected to the LAN 8 and the LAN address. ing. And a fax machine
When the data is received from the server 1, the above-mentioned terminal identification information is extracted from the received data and the LA corresponding thereto is extracted.
The N address is obtained from the above correspondence table. Then, the data received from the facsimile server 1 is transferred to the LAN address.

By doing so, even if the LAN addresses of the data terminal devices 2 to 4 on the LAN 8 are unknown, the data can be transmitted to any data terminal device as long as the terminal identification information of each data terminal device is known. You can As a conventional document related to such a communication server such as a facsimile server, there is, for example, Japanese Patent Laid-Open No. 63-5913.
No. 8 and Japanese Patent Laid-Open No. 3-102950.

[0004]

However, in the above-mentioned conventional technique, when transmitting data, the contents of the correspondence table held by the facsimile server on the receiving side cannot be seen on the transmitting side. Therefore, since it is necessary to specify the terminal identification information of the destination data terminal device at the time of data transmission, the sending side also separately creates a terminal identification information list of the data terminal device on the receiving side LAN and holds it in some form. There is a problem that it has to be done and it takes time. Also, if a data terminal device is deleted, added, or the terminal identification information is changed on the other party's LAN, the contents cannot be immediately known, and data is sent to a nonfunctional data terminal device. However, there is a problem in that it becomes impossible to quickly transmit data to a newly established or changed data terminal device.
An object of the present invention is to solve such a problem.

[0005]

In order to solve the above-mentioned problems, according to the present invention, in a communication server provided between a first LAN and a public network, a terminal of a data terminal device on the first LAN is provided. A correspondence table storage unit for storing a correspondence table showing the correspondence between the identification information and the LAN address,
Correspondence table updating means for updating the correspondence table when a change occurs in the data terminal device on the first LAN, and on the second LAN connected to the first LAN via the public network. Correspondence table transmitting means for transmitting the correspondence table in response to a request from the communication server, and a request to the communication server on the second LAN when transmitting data to the data terminal device on the second LAN. Then, the terminal identification information in the correspondence table relating to the data terminal device on the second LAN that has been received is displayed, and the terminal identification information as the destination selected from the table or the LAN corresponding to the terminal identification information. The data transmission means for transmitting data by adding an address is provided. Also, the first
In a communication server provided between the LAN and the public network, the first correspondence table showing the correspondence between the terminal identification information of the data terminal device on the first LAN and the LAN address, and the public network A correspondence table storage unit that stores a second correspondence table indicating a correspondence relationship between the terminal identification information of the data terminal device on the second LAN connected via the LAN and the LAN address, and communication on the second LAN. When the correspondence table regarding the data terminal device on the first LAN, which is held by the communication server on the second LAN, is not updated to the latest content when transmitting / receiving data to / from the server, Correspondence table transmitting means for transmitting the first correspondence table to a communication server on a LAN;
When a change occurs in the data terminal device on the LAN, the first correspondence table is updated, and the second LA is also updated.
When transmitting / receiving data to / from the communication server on N, the second
If the correspondence table of is not updated with the latest contents,
From the communication server on the second LAN to the second LAN
Correspondence table updating means for receiving the correspondence table for the above data terminal device and updating the second correspondence table, and the second correspondence when transmitting data to the data terminal device on the second LAN. The terminal identification information in the table is displayed, and terminal identification information as a destination selected from the terminal identification information, or a data transmission unit for transmitting data by adding a LAN address corresponding to the terminal identification information is provided. I decided. Also, in the communication server provided between the first LAN and the public network, the first L
A first correspondence table showing the correspondence between the terminal identification information of the data terminal equipment on the AN and the LAN address, and the terminal identification information and LAN of the data terminal equipment on the second LAN connected via the public network. A correspondence table storage unit that stores a second correspondence table indicating a correspondence relationship with an address,
When a change occurs in the data terminal device on the first LAN, the first correspondence table updated according to the change or an update signal transmitting unit for sending an update signal indicating the changed contents through the public network, , When the data terminal device on the first LAN is changed, the first correspondence table is updated, and from the communication server on the second LAN to the data terminal on the second LAN. A correspondence table updating unit that updates the second correspondence table on the basis of a correspondence table relating to a device or an update signal indicating a change content of the correspondence table, and the second L
When transmitting data to the data terminal device on the AN, the terminal identification information in the second correspondence table is displayed, and the terminal identification information as the destination selected from the terminal identification information or the terminal identification information is displayed. A data transmitting means for transmitting data by adding a corresponding LAN address is provided. Furthermore, in each of the communication servers, the second
When sending data to the data terminal device on the LAN,
Each terminal identification information of the correspondence table regarding the data terminal device on the second LAN is made to correspond to a predetermined key of the operation unit, and one of the keys is pressed to select the terminal identification information of the transmission destination. I decided to configure it.

[0006]

[Operation] In the correspondence table storage unit of the communication server, a correspondence table indicating the correspondence between the terminal identification information of the data terminal device on the first LAN to which the communication server is connected and the LAN address is stored. The correspondence table is the first
When the data terminal device on the LAN is changed, the correspondence table updating means updates the data terminal device. In addition, the first LA
When there is a transmission request for the correspondence table from the communication server on the second LAN connected to N via the public network, the correspondence table transmitting means transmits the correspondence table. The correspondence table storage section, the correspondence table updating means, and the correspondence table transmitting means also have a communication server on the second LAN. Then, when transmitting data to the communication server on the second LAN, first, the communication server on the second LAN is requested to transmit a correspondence table regarding the data terminal device on the second LAN. When the correspondence table is received, the terminal identification information is taken out of the correspondence table and displayed. When the sender inputs the terminal identification information of the destination while looking at it, the terminal identification information or the LAN address corresponding to the terminal identification information is added and the data is transmitted. In this way, the data transmission side communication server does not need to separately create and maintain a terminal identification information list of data terminal devices on the receiving side LAN, and the data on the receiving side LAN can be saved. It is possible to specify a terminal device and send data. In addition, even if the data terminal device is deleted or added on the partner LAN, or the terminal identification information is changed, when the data is transmitted, the correspondence table updated according to the change is referred to. There is no need to send data to a non-functioning data terminal device, and it is possible to quickly send data to a newly established data terminal device.

Further, in the correspondence table storage section of the communication server, a first correspondence table showing a correspondence relationship between the terminal identification information of the data terminal device on the first LAN to which the communication server is connected and the LAN address, A second correspondence table indicating a correspondence relationship between the terminal identification information of the data terminal device on the second LAN connected to the first LAN via the public network and the LAN address is stored. The second correspondence table is stored in the second LAN by the correspondence table updating means.
When sending / receiving data to / from the above communication server, or
The data terminal device on the second LAN is updated when a change occurs. Then, from the communication server to the second LA
When transmitting data to the communication server on N, the terminal identification information is extracted from the second correspondence table and displayed. When the sender inputs the terminal identification information of the destination while looking at it, the terminal identification information or the LAN address corresponding to the terminal identification information is added and the data is transmitted. By doing so, since the correspondence table is not necessarily transmitted every time data is transmitted, the number of times the correspondence table is transmitted is reduced, and the communication load is reduced accordingly.

Further, in each of the communication servers, the terminal identification information of the correspondence table relating to the data terminal device on the second LAN is made to correspond to a predetermined key of the operation unit, and is transmitted by pressing one of the keys. The terminal identification information is input. By doing so, when the destination data terminal device is designated, complicated key input can be omitted and the operation can be simplified.

[0009]

Embodiments of the present invention will now be described in detail with reference to the drawings. (First Embodiment) FIG. 1 is a block diagram showing an outline of a network to which the present invention is applied. The reference numerals correspond to those in FIG. The facsimile servers 1 and 3 are shown in FIG.
5, the data terminal devices 2 and the data terminal devices 4 to 4 connected to the LANs 7 and 8 respectively.
It holds a correspondence table showing the correspondence between the terminal identification information of No. 6 and the LAN address. However, in the facsimile server of this embodiment, not only the correspondence table is held, but also the correspondence table held by itself is transmitted in response to a request from the transmission side when transmitting data between LANs. I try to send it to a facsimile server.

For example, when transmitting data from the facsimile server 1 to the data terminal device 4, first, the facsimile server 1 sends to the facsimile server 3
Request to send the correspondence table. In response to the request, the facsimile server 3 transmits the correspondence table held by itself to the facsimile server 1. In the facsimile server 1, based on the received correspondence table, all the data terminal devices 4 to 4 connected to the LAN 8
Displays a list of terminal identification information D ₂ to D ₄ of 6, locate the terminal identification information D ₂ of the destination data terminal device 4 therein and inputs the terminal identification information D _2.

FIG. 2 is a block diagram showing an outline of the facsimile server. In FIG. 2, 10 is a CPU (central processing unit) and ROM (read only memory), 10a is a correspondence table transmitting means, 10b is a correspondence table updating means, 10c is a data transmitting means, and 11 is a RAM (random access memory). , 11a is a correspondence table storage unit,
Reference numeral 12 is an image input unit, 13 is an image output unit, 14 is a display operation unit, 15 is a protocol control unit, 16 is a LAN interface, and 17 is a public line control unit.

The CPU and the ROM 10 use the control program stored in the ROM to control input / output, manage files,
Performs memory management, etc. The correspondence table transmitting means 10a
It is realized by the CPU and the ROM 10, and when a correspondence table transmission request is made from the outside through a public line, the correspondence table is taken out from the correspondence table storage unit 11a,
Send to requester. Correspondence table updating means 10b is also realized by CPU and ROM 10, and own LAN
When the above data terminal device is deleted or added, or the terminal identification information or LAN address is changed, the correspondence table is updated according to the contents. The data transmitting means 10c requests the destination facsimile server for the correspondence table on the other side, refers to the received correspondence table, specifies the destination data terminal device, and transmits the data. RAM11 is the work of the control program.
The correspondence table storage unit 11a is used as an area and a buffer area for transmission / reception data.

The image input unit 12 reads image information of a document to be transmitted by facsimile and stores it in the RAM 11.
The image output unit 13 outputs the received image information as needed. The display operation unit 14 displays various kinds of information on a liquid crystal display or the like, and inputs operation information using a data input key. The protocol control unit 15 controls the LAN protocol, and the LAN interface 16
Matches the signal level on the LAN with the signal level of the IC in the facsimile server. Public line control unit 17
Controls the public line protocol.

FIG. 3 is a block diagram showing an outline of the data terminal device. In FIG. 3, 20 is a CPU and 21 is an R
OM, 22 is RAM, 23 is a CRT control unit, 24 is a keyboard, 25 is a protocol control unit, and 26 is a LAN interface. The CPU 20 performs input / output control, file management, memory management and the like. ROM21 is CPU2
It stores the control program and system data executed by 0. The RAM 22 is used as a work area for a control program or the like. Protocol control unit 25 and LAN
The interface 26 is basically the protocol control unit 15 and the LAN interface 1 shown in FIG.
It is the same as 6. The CRT control unit 23 controls the CRT display, and the keyboard 24 is for inputting data.

Next, the operation of the first embodiment will be described with reference to a flow chart by taking the case of transmitting data from the facsimile server 1 to the data terminal device 4 as an example. Figure 6
In the first embodiment, from the facsimile server to another L
6 is a flowchart showing a processing procedure in a sender-side and destination-side facsimile server when communicating with a data terminal on an AN. FIG. 6A shows the processing of the CPU of the transmitting side facsimile server 1, and FIG. 6B shows the processing of the CPU of the receiving side facsimile server 3.

Step T1 ... In the transmission side facsimile server 1, the display operation unit 14 inputs the number (telephone number) of the facsimile server 3 connected to the same LAN as the data terminal device 4 which is the transmission destination. Step T2: The image input section 12 inputs image information of the original to be transmitted. Step T3 ... Calls the facsimile server 3 on the called side. Step R1 ... The receiving side facsimile server 3 determines whether or not an incoming call is received from the facsimile server 1. Step R2, Step T4 ... When there is an incoming call, the line between the facsimile server 1 and the facsimile server 3 is connected.

Step T5: The sending side facsimile server 1 sends a company mode setting request signal to the facsimile server 3 in order to exchange the correspondence table. Step R3 ... In the facsimile server 3 on the receiving side, it is judged whether or not there is a request for setting the company mode from the facsimile server 1. Step R4: If there is no request for setting the company mode, normal reception is performed. Step R5 ... If there is a request for setting the company mode in step R3, the company mode is set.

Step T6 ... The transmitting facsimile server 1 requests the facsimile server 3 to transmit the correspondence table. Step R6 ... In the facsimile server 3 on the receiving side, it is judged whether or not there is a transmission request of the correspondence table from the facsimile server 1. Step R7 ... If there is, the correspondence table is transmitted to the facsimile server 1.

Step T7 ... The transmitting facsimile server 1 determines whether or not the reception of the correspondence table is completed. Step T8 ... Upon completion, the received correspondence table is stored in the correspondence table storage unit 11a. Step T9 ... Takes out the terminal identification information from the correspondence table and displays it on the display operation unit 14. Step T10 ... While referring to the displayed terminal identification information, the terminal identification information of the data terminal device 4 of the data transmission destination is input from the display operation unit 14. Step T11 ... The LAN address corresponding to the input terminal identification information is retrieved from the correspondence table storage unit 11a. Step T12 ... The retrieved LAN address is transmitted to the called facsimile server 3. Step T13: Image information is transmitted.

Step R8 ... At the called facsimile server 3, L
It is determined whether or not the reception of the AN address is completed. Step R9 ... Stores the received LAN address in the RAM 11. Step R10 ... It is determined whether or not the image information has been received. Step R11 ... Stores the received image information in the RAM 11. Step R12, Step T14 ... Disconnect the line.

Step R13 ... The image information stored in the RAM 11 is transferred to the LAN.
Data format for use. Step R14 ... Image information is transmitted to the LAN address stored in the RAM 11.

The above steps R6 and R7 correspond to the correspondence table transmitting means 10a of the facsimile server 3, and steps T6 to T13 correspond to the facsimile server 1.
Of the data transmission means 10c. Further, in the above example, the entire correspondence table is transmitted from the receiving side facsimile server 3 to the transmitting side facsimile server 1, but only the terminal identification information in the correspondence table may be transmitted. In that case, the sending facsimile that received it
The server 1 selects one from the received terminal identification information and sends it to the called facsimile server 3. The facsimile server 1 that has received the request retrieves the LAN address corresponding to the received terminal identification information from the correspondence table.

Next, a case where data is transmitted from the data terminal device 2 to the data terminal device 4 via the facsimile servers 1 and 3 will be described. FIG. 7 is a flowchart showing a processing procedure in the transmitting terminal device and the transmitting side facsimile server when communicating from the data terminal device to the data terminal on another LAN in the first embodiment. FIG. 7A shows the CPU 1 of the sending facsimile server 1.
7 shows the processing of 0, and FIG.
The process of PU20 is shown.

Step D 1 ... In the data terminal device 2, the keyboard 24
Enter the number of the called side facsimile server 3. Step D2: The number of the facsimile server 3 on the receiving side is transmitted to the facsimile server 1 on the transmitting side. Step D3: Image information is transmitted to the transmitting facsimile server 1.

Step S1 ... The transmitting side facsimile server 1 determines whether or not the reception of the number of the receiving side facsimile server 3 from the data terminal device 2 is completed. Step S2 ... When the reception is completed, it is determined whether or not the reception of the image information from the data terminal device 2 is completed. Step S3 ... Make a call to the called facsimile server 3. Step S4: The line with the facsimile server 3 is connected. Step S5: In order to exchange the correspondence table, a setting request signal for the in-house mode is sent to the facsimile server 3. Step S6 ... Transmits a correspondence table transmission request signal to the facsimile server 3 Step S7 ... Determines whether the correspondence table reception from the facsimile server 3 is completed. Step S8 ... When the reception is completed, the received correspondence table is stored in the correspondence table storage unit 11a. Step S9 ... Takes out the terminal identification information from the correspondence table and sends it to the data terminal device 2.

Step D4 ... The data terminal device 2 determines whether or not the reception of the terminal identification information from the sending facsimile server 1 is completed. Step D5 ... When the reception is completed, the terminal identification information is displayed, and the terminal identification information of the data terminal device 4 of the data transmission destination is input from the keyboard 24 while referring to it. Step D6 ... The inputted terminal identification information is transmitted to the transmitting side facsimile server 1.

Step S10 ... At the sending facsimile server 1,
It is determined whether the reception of the terminal identification information of the data terminal device 4 from the data terminal device 2 is completed. Step S11 ... When the reception is completed, the LAN address corresponding to the received terminal identification information is retrieved from the correspondence table storage unit 11a. Step S12: The retrieved LAN address is transmitted to the facsimile server 3 on the receiving side. Step S13 ... Transmits the image information received in step S2 to the facsimile server 3 on the called side. Step S14 ... Disconnects the line to the called facsimile server 3.

The communication between the sending side facsimile server 1 and the receiving side facsimile server 3 is carried out in the same manner as in FIG.

(Second Embodiment) In the first embodiment, the facsimile server has a correspondence table of data terminal devices on its own LAN, and receives a request from the transmitting facsimile server every time data is received. Then, the correspondence table was transmitted. On the other hand, in addition to the correspondence table of the data terminal device on the own LAN, the facsimile server may have the correspondence table of the data terminal device on the other LAN.

FIG. 4 is a diagram showing an example of the contents of the correspondence table storage section in each facsimile server in the second embodiment. Applying the example of FIG. 1 to explain, FIG.
4A shows the contents of the correspondence table storage unit of the facsimile server 3, and FIG. 4B shows the contents of the correspondence table storage unit of the facsimile server 1. Among them,
The correspondence tables T ₁₁ and T ₂₁ are related to the data terminal devices connected to the LAN 8, and the correspondence tables T ₁₂ and T ₂₁ are
Reference numeral ₂₂ relates to a data terminal device connected to the LAN 7. Then, update numbers R _{11 to} R ₂₂ indicating the newness are added to each correspondence table.

In this embodiment, since the facsimile server of each LAN has the correspondence table of the data terminal device on the other LAN, when transmitting the data to the data terminal device 4 on the other LAN, Recipient facsimile ・
There is no need to request a correspondence table from the server. However, each correspondence table needs to be always the latest when referring to it. Therefore, when a change occurs in the data terminal device on the LAN, it is necessary to update the correspondence table before the next reference. As the time to update it,
The time when data is transmitted and the time when a change occurs in the data terminal device can be considered. As an updating method, there are a method of updating the entire table and a method of updating only the changed portion.

Next, an example in which the entire correspondence table is updated at the time of data transmission will be described by taking the case of transmitting data from the facsimile server 1 to the data terminal device 4 as an example. FIG. 8 and FIG. 9 are flowcharts showing a processing procedure in the transmitting side and receiving side facsimile servers when communicating from the facsimile server to another data terminal on the LAN in the second embodiment. Figure 8 (a),
FIG. 9A shows the CPU of the sending side facsimile server 1.
8 (b) and 9 (b) show the processing of the CPU of the called side facsimile server 3. Since steps T1 to T5 and steps R1 to R5 are the same as those in FIG. 6, the description thereof is omitted here.

Step T6: The transmitting side facsimile server 1 transmits the update number R ₂₁ of the correspondence table T ₂₁ regarding the data terminal device on the receiving side LAN which it holds to the receiving side facsimile server 3. To do. Step R6 ... incoming facsimile server 3 determines whether it has received the update number R ₂₁ of the corresponding table T _21. Step R7 ... When you receive, update number R ₂₁ is received,
It is determined whether or not it matches the update number R ₁₁ of the corresponding table T ₁₁ corresponding thereto. In Step R8 ... do not match, the correspondence table T ₂₁ for transmitting facsimile server 1 holds is not up to date, in order to update it, sends the correspondence table T ₁₁ where he is held Send to the side facsimile server 1. Step R9 ... Then, transmits the update number R ₁₁ of that table.

Step T7 ... The transmitting facsimile server 1 determines whether or not the correspondence table T ₁₁ is received. Step T8 ... If there is a reception, the old correspondence table T ₂₁
Instead, the received correspondence table T ₁₁ is stored in the correspondence table storage unit 11a. Step T9 ... It is determined whether or not the update number R ₁₁ of the correspondence table T ₁₁ is received. Step T10 ... Upon reception, the update number R ₂₁ of the correspondence table T ₂₁ is rewritten to the update number R ₁₁ .

Step R10 ... Next, the called side facsimile server 3
Confirms whether or not the correspondence table T ₁₂ regarding the data terminal device on the transmission side LAN that it holds is the latest one, with respect to the transmission side facsimile server 1, the update number of the correspondence table T ₁₂ Send R ₁₂ . Step T11 ... transmitting facsimile server 1 determines whether it has received the update number R ₁₂ correspondence table T _12. Step T12 ... When received, the received update number R
_12, the update number R ₂₂ of the corresponding table T ₂₂ corresponding thereto
It is determined whether or not In step T13 ... it does not match, the correspondence table T ₁₂ the called side facsimile server 3 holds because not current, in order to update it, incoming correspondence table T ₂₂ where he is held Send to the side facsimile server 3. Step T14 ... Then, the update number R _{22 of the} table
To send.

Step R11 ... The called side facsimile server 3
Table T_{twenty two}It is determined whether or not was received. Step R12 ... If there is a reception, the old correspondence table T
₁₂Instead of the received correspondence table T_{twenty two}Corresponding table
It is stored in the storage unit 11a. Step R13 ... Correspondence table T_{twenty two}Update number R_{twenty two}Received
Determine whether or not you believe. Step R14 ... Correspondence table T when received₁₂Update
Number R₁₂Update number R _{twenty two}Rewrite

Hereinafter, steps T15 to T20 and steps R15 to R21 are steps T9 in FIG.
~ T14 and steps R8 to R14 are the same,
The description is omitted here. In addition, the above steps R6 to R
9 and steps T11 to T14 correspond to the corresponding table transmitting means 10a of the facsimile servers 3 and 1, respectively.
The steps R10 to R14 and the steps T6 to T10 correspond to the correspondence table updating means 10b of the facsimile servers 3 and 1, and the steps T15 to T19 correspond to the data transmitting means 10c.
Equivalent to. According to this embodiment, although a large capacity is required for the correspondence table storage unit, transmission of the correspondence table is
Since it is not necessarily performed for each communication, the number of transmissions of the correspondence table is reduced, and the communication load is reduced accordingly.

(Third Embodiment) Next, an embodiment in which the correspondence table is updated at the time when the data terminal device is changed,
The case where the data terminal device connected to the LAN 7 is changed will be described as an example. FIG. 10 is a flowchart showing a processing procedure when updating the correspondence table in the third embodiment. FIG. 10A shows the processing of the CPU of the facsimile server 1, and FIG.
The processing of the CPU of the server 3 is shown.

Step T1: The facsimile server 1 uses the LAN 7 from its own operation panel or from the data terminal device.
A change has occurred in the data terminal equipment connected to the
Also, it is determined whether or not the correspondence table update information indicating the contents has been input. Step T2 ... When there is an input, it updates the corresponding table T ₂₂ in accordance with the correspondence table update information. Step T3 ... Calls the facsimile server 3. Step R1 ... The facsimile server 3 determines whether or not there is an incoming call from the facsimile server 1. Step R2, Step T4 ... When there is an incoming call, the line between the facsimile server 1 and the facsimile server 3 is connected.

Step T5: The facsimile server 1 sends a company mode setting request signal to the facsimile server 3 in order to exchange the correspondence table and the like. Step R3 ... The facsimile server 3 determines whether or not there is a request for setting the company mode from the facsimile server 1. Step R4: If there is no request for setting the company mode, normal reception is performed. Step R5 ... If there is a request for setting the company mode in step R3, the company mode is set.

Step T6: The facsimile server 1 sends an update instruction signal having a predetermined pattern in order to update the correspondence table T ₁₂ in accordance with the update of the correspondence table T _22. Send to. Step T7 ... subsequently, transmits the correspondence table T _22. Step R6 ... The facsimile server 3 receives the update instruction signal. Step R7 ... Subsequently, the correspondence table T ₂₂ is received. Step R8 ... Rewrites the correspondence table T ₁₂ of the correspondence table storage unit 11a to the contents of the correspondence table T ₂₂ . Step R9, Step T8 ... Facsimile server 1
The line between the facsimile server 3 and the facsimile server 3 is disconnected.

In this embodiment, steps T6 and T7 correspond to the table transmitting means 10a of the facsimile server 1, and steps T1 and T2 and steps R6 to R8 respectively. ，
3 corresponds to the table updating means 10b. In this embodiment, since the correspondence table is updated every time the data terminal device is changed, it is not necessary to compare the update numbers of the correspondence tables as in the second embodiment. It is not necessary to hold the update number of each correspondence table.

FIG. 11 is a flow chart showing the processing procedure in the transmitting side and receiving side facsimile servers when communicating from the facsimile server to the data terminal on another LAN in the third embodiment. Figure 11 (a)
Shows the processing of the CPU of the transmitting side facsimile server 1, and FIG. 11B shows the processing of the CPU of the receiving side facsimile server 3. Steps T1 to T5 and steps R1 to R5 are steps T1 in FIG.
~ T5 and steps R1 to R5 are the same, and steps T6 to T11 and steps R6 to R12 are the same as in FIG.
Steps T9 to T14 and Step R8
~ The same as R14. That is, this process is different from that of FIG. 6 in that the process relating to the exchange of the correspondence table is eliminated.

(Fourth Embodiment) Next, the correspondence table is updated when the data terminal device is changed, and
An embodiment in which only the changed portion is updated will be described by taking as an example the case where the data terminal device connected to the LAN 7 is changed. FIG. 5 is a diagram showing a CPU and a ROM in the fourth embodiment. The reference numeral corresponds to that of FIG. 2, and 10d is an update signal transmitting means. When the correspondence table relating to the data terminal device on its own LAN is updated, the update signal sending means 10d sends an update signal indicating the updated content, the terminal identification information, and the LAN address to the facsimile server on the other LAN. FIG. 12 is a flowchart showing the processing procedure when updating the correspondence table in the fourth embodiment. FIG. 12A shows the processing of the CPU of the facsimile server 1, and FIG. 12B shows the processing of the CPU of the facsimile server 3.

Step T1: The facsimile server 1 uses the LAN 7 from its own operation panel or data terminal device.
A change has occurred in the data terminal equipment connected to the
Also, it is determined whether or not the correspondence table update information indicating the contents has been input. Step T2 ... When there is an input, it updates the corresponding table T ₂₂ in accordance with the correspondence table update information. Step T3 ... It is determined whether the update content is deletion or addition of a data terminal device, or change of terminal identification information or LAN address. Step T4 ... In the case of deleting the data terminal device, a signal pattern indicating the deletion of the data terminal device is set in the update signal. Step T5 ... In the case of adding the data terminal device, a signal pattern indicating the addition of the data terminal device is set in the update signal. Step T6 ... In the case of changing the terminal identification information and the LAN address, a signal pattern indicating the change including the terminal identification information and the LAN address to be changed is set in the update signal. Step T7 ... Deleted, added or changed terminal identification information D _{N and} LAN address A _N are added to the update signal pattern.

Step T8: The facsimile server 3 is called. Step R1 ... The facsimile server 3 determines whether or not there is an incoming call from the facsimile server 1. Step R2, Step T9 ... When there is an incoming call, the line between the facsimile server 1 and the facsimile server 3 is connected.

Step T10: In order to exchange the update signal of the correspondence table, a company mode setting request signal is sent to the facsimile server 3. Step R3 ... The facsimile server 3 determines whether or not there is a request for setting the company mode from the facsimile server 1. Step R4: If there is no request for setting the company mode, normal reception is performed. Step R5 ... If there is a request for setting the company mode in step R3, the company mode is set.

Step T11 ... The facsimile server 1 sends an update signal to the facsimile server 3. Step R6 ... The facsimile server 3 receives the update signal. Step R7, Step T12 ... Disconnects the line between the facsimile server 1 and the facsimile server 3.

Step R8 ... Based on the received update information, the facsimile server 3 determines whether the update content is deletion or addition of a data terminal device, or terminal identification information or LAN address change. Step R9 ... In the case of deleting the data terminal device, the terminal identification information and LAN address indicated by the update signal are deleted from the correspondence table T ₁₂ . Step R10 ... When additional data terminal equipment, the terminal identification information and the LAN address indicating the update signal, to add to the association table T _12. Step R11 ... terminal identification information, in the case of LAN address change, change update signal indicates a change target, the terminal identification information or LAN address in the correspondence table T _12, to the new terminal identification information or LAN address indicating the update signal To do.

In this embodiment, the steps T1 and T2 and the steps R6 and R8 to R11 correspond to the correspondence table updating means 10b of the facsimile servers 1 and 3, respectively, and the steps T3 to T11 are the same. Corresponds to the update signal transmitting means 10d of the facsimile server 1. According to this embodiment, the amount of data transmitted for updating the correspondence table can be reduced as compared with the case of transmitting the entire correspondence table.

(Fifth Embodiment) Next, an embodiment will be described in which the delivery destination terminal identification information is input by a one-touch key.
FIG. 13 is a diagram showing an example of the display operation unit of the facsimile server in the fifth embodiment. In FIG. 13, 1
Reference numeral 4a is a display unit, and 14b is an operation unit. Display unit 14a
Is composed of a liquid crystal display or the like, and the operation unit 14b is composed of a group of operation keys such as speed dial keys and display selection keys. In this embodiment, each key of the operation unit 14b is associated with the delivery destination terminal identification information or the LAN address so that the delivery destination terminal identification information or L
Allows you to enter the AN address.

For example, the sending facsimile server
Before sending data, receive the correspondence table of data destination,
When sending data by referring to the corresponding table,
When the correspondence table is received, the terminal identification information in the correspondence table is assigned to each key of the speed dial. Also,
If the destination correspondence table is stored in advance, the terminal identification information in the stored destination correspondence table is stored in each speed dial key when the line number of the called facsimile server is entered. assign. The result is
It is displayed on the display unit 14a as shown in FIG.

Next, a processing procedure for designating a delivery destination in the fifth embodiment will be described. FIG. 14 is a flowchart showing the processing procedure when the delivery destination is designated in the fifth embodiment. Step 1 ... As shown in the upper part of the display unit 14a in FIG.
A comment prompting the key input of the delivery destination is displayed on the display unit 14a of the display operation unit 14. Step 2 ... As shown at the bottom of the display unit 14a in FIG.
A list of terminal identification information of data terminal devices on the destination LAN is displayed. Step 3 ... Receives a key input from the operation unit 14b. Step 4 ... The LAN address corresponding to the input key is retrieved from the correspondence table storage unit 11a.

This process corresponds to the steps T9 to T11 in FIG. 6A.

[0055]

As described above, according to the communication server of the present invention, the sender is required to separately create and hold the terminal identification information list of the data terminal device on the other party's LAN. It is possible to specify a data terminal device on the LAN on the receiving side and transmit data without calling. Further, even if the data terminal device is deleted, added, or the terminal identification information is changed on the partner LAN, the correspondence table can be updated immediately or at the time of data transmission / reception. Since the latest data can be obtained, it is not necessary to send the data to the non-functioning data terminal device, and the data can be quickly sent to the newly established data terminal device. Furthermore, by making the terminal identification information designating the destination data terminal device correspond to a predetermined key of the operation unit and pressing one of the keys to input the destination,
When the destination data terminal device is designated, complicated key input can be omitted and the operation can be simplified.

[Brief description of drawings]

FIG. 1 is a block diagram showing an outline of a network to which the present invention is applied.

FIG. 2 is a block diagram showing an outline of a facsimile server.

FIG. 3 is a block diagram showing an outline of a data terminal device.

FIG. 4 is a diagram showing an example of contents of a correspondence table storage section in each facsimile server in the second embodiment.

FIG. 5 is a diagram showing a CPU and a ROM in the fourth embodiment.

FIG. 6 is a flowchart showing a processing procedure in a transmitting side and a receiving side facsimile server when a facsimile server communicates with a data terminal on another LAN in the first embodiment.

FIG. 7 is a flowchart showing a processing procedure in the transmitting terminal device and the transmitting side facsimile server when communicating from the data terminal device to the data terminal on another LAN in the first embodiment.

FIG. 8 is a flowchart (No. 1) showing a processing procedure in a transmitting side and a receiving side facsimile server when a facsimile server communicates with a data terminal on another LAN in the second embodiment.

FIG. 9 is a flowchart showing a processing procedure in the transmitting side and receiving side facsimile servers when communicating from the facsimile server to a data terminal on another LAN in the second embodiment (No. 2).

FIG. 10 is a flowchart showing a processing procedure for updating a correspondence table in the third embodiment.

FIG. 11 is a flowchart showing a processing procedure in a transmitting side and a receiving side facsimile server when a facsimile server communicates with a data terminal on another LAN in the third embodiment.

FIG. 12 is a flowchart showing a processing procedure when updating a correspondence table in the fourth embodiment.

FIG. 13 is a diagram showing an example of a display operation unit of the facsimile server according to the fifth embodiment.

FIG. 14 is a flowchart showing a processing procedure when a delivery destination is designated in the fifth embodiment.

FIG. 15 is a block diagram showing an outline of a network including a facsimile server.

[Explanation of symbols]

1, 3 ... Facsimile server, 2, 4-6 ... Data terminal device, 7, 8 ... LAN, 9 ... Public network, 10 ... CPU and ROM, 10a ... Corresponding table transmitting unit, 10b ... Corresponding table updating unit, 10c ... data transmitting means, 10d ... update signal transmitting means 11,22 ... RAM, 11a ... corresponding table storage section, 12 ... image input section, 13 ... image output section, 14 ... display operation section, 14a ... display section, 14b ...
Operating unit, 15, 25 ... Protocol control unit, 16, 26 ...
LAN interface, 17 ... Public line control unit, 20
... CPU, 21 ... ROM, 23 ... CRT control section, 24 ...
keyboard

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Internal reference number FI Technical indication location H04L 12/28 H04N 1/00 104 Z (72) Inventor Fumio Koizumi 3-7, Iwatsuki City, Saitama Prefecture No. 1 within Fuji Xerox Co., Ltd. (72) Inventor Makoto Kimura 3-7-1 Fuchu, Iwatsuki City, Saitama Prefecture Within Fuji Xerox Co., Ltd.

Claims (4)

[Claims] 1. A communication server provided between a first LAN and a public network, storing a correspondence table showing a correspondence between terminal identification information of a data terminal device on the first LAN and a LAN address. And a correspondence table updating unit that updates the correspondence table when a change occurs in the correspondence table storage unit and the data terminal device on the first LAN, and is connected to the first LAN via the public network. Second
Correspondence table transmitting means for transmitting the correspondence table in response to a request from a communication server on the second LAN, and on the second LAN when transmitting data to the data terminal device on the second LAN. The terminal identification information in the correspondence table relating to the data terminal device on the second LAN received by the communication server is displayed, and the terminal identification information as the transmission destination selected from the terminal identification information, or the terminal identification A communication server, comprising: a data transmitting means for transmitting data by adding a LAN address corresponding to information. 2. A communication server provided between a first LAN and a public network, the first correspondence indicating a correspondence between terminal identification information of a data terminal device on the first LAN and a LAN address. A correspondence table storage unit for storing a table, and a second correspondence table showing a correspondence relationship between the terminal identification information of the data terminal device on the second LAN connected via the public network and the LAN address; When transmitting / receiving data to / from the communication server on the second LAN, the correspondence table regarding the data terminal device on the first LAN, which is held by the communication server on the second LAN, is updated to the latest contents. If not, the second LA
The correspondence table transmitting means for transmitting the first correspondence table to the communication server on N and the first correspondence table are updated when a change occurs in the data terminal device on the first LAN, and If the second correspondence table is not updated to the latest contents when transmitting / receiving data to / from the communication server on the second LAN, the communication server on the second LAN may change to the second LAN. Correspondence table updating means for receiving a correspondence table concerning the above data terminal device and updating the second correspondence table, and the second correspondence when transmitting data to the data terminal device on the second LAN. The terminal identification information in the table is displayed, and the terminal identification information as the transmission destination selected from the table or the LAN address corresponding to the terminal identification information is added and the data is transmitted. Communication server, characterized in that it comprises a chromatography data transmission means. 3. A communication server provided between a first LAN and a public network, the first correspondence indicating a correspondence between terminal identification information of a data terminal device on the first LAN and a LAN address. A correspondence table storage unit for storing a table, and a second correspondence table showing a correspondence relationship between the terminal identification information of the data terminal device on the second LAN connected via the public network and the LAN address; When a change occurs in the data terminal device on the first LAN, the first correspondence table updated according to the change or an update signal indicating the contents of the change is transmitted through the public network, When a change occurs in the data terminal device on the first LAN, the first correspondence table is updated, and the communication server on the second LAN changes the data terminal device on the second LAN. Correspondence table relating to the device, or a correspondence table updating means for updating the second correspondence table on the basis of an update signal indicating a change content of the correspondence table; and a data terminal device on the second LAN. When transmitting data to the terminal, the terminal identification information in the second correspondence table is displayed, and the terminal identification information as the transmission destination selected from the terminal identification information or the LAN address corresponding to the terminal identification information is added. And a data transmitting means for transmitting data. 4. When transmitting data to a data terminal device on the second LAN, each terminal identification information of a correspondence table relating to the data terminal device on the second LAN is stored in a predetermined key of the operation unit. 4. The communication server according to claim 1, wherein the terminal identification information of the transmission destination is selected by pressing one of the keys.