JPH09247266A - Call back requesting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a telephone charge without data communication at the time of requesting call back by writing a pattern showing a call back request within the user and user information frame of ISDN and sending it. SOLUTION: In order to start communication with an inter-LAN connector 2 on the side of executing call back, an inter-LAN connector 1 on the side of requesting call back issues a call setting 6 to the connector 2. At this time, the connector 1 writes a fixed pattern showing a previously fixed call back request within the user and user information frame 5 of ISDN 3 and sends it toward the connector 2. In addition, the connector 1 sends a caller's number 4 to the connector 2 by the caller's number information service of ISDN 3. In addition the caller's number 4 can be sent by writing within the user and user information frame 5 of ISDN 3. Thereby a cost necessary for a call back request is remarkably reduced.

Description

Detailed Description of the Invention

TECHNICAL FIELD The present invention relates to a plurality of devices and LAs.
The present invention relates to a method for requesting a callback from a device or an inter-LAN connecting device in a system in which N is connected via an ISDN network.

[0001]

2. Description of the Related Art A local area network (hereinafter referred to as LA
Write N. When a terminal device connected to (1) communicates with a device connected to another LAN, the inter-LAN connecting device of its own LAN may be connected to another LAN via the ISDN network. Also, from an individual terminal device to another device (such as a host computer) or L via the ISDN network.
May be connected to AN. In these cases, a method called callback is performed in order to ensure security in the device that has received the connection request or the LAN-to-LAN connecting device.

In this method, for example, when the requested device or the LAN-to-LAN connecting device receives the call setting, the call back request information and the caller ID information, the communication is temporarily cut off,
This is a method in which the device itself makes a call again and reconnects.

In this case, data communication is performed to notify the call back request information and the sender ID information.
Call setup and disconnection operations are being performed for that purpose.

[0004]

Therefore, the line is connected only for a call back request, and the charge for one data communication is charged. Therefore, this is one of the causes of the increase in the communication charge on the side making the callback request.

An object of the present invention is to provide a method capable of reducing communication charges without performing data communication when requesting a callback.

[0006]

According to the present invention, for the above-mentioned purpose, a device requesting a callback or an inter-LAN connecting device writes a pattern indicating a callback request in a user user information frame of an ISDN network and sends it out. .

When the pattern is sent, the caller number of the requester is sent by using the caller number notification service of ISDN or written in the user information frame.

A device or LA on the callback execution side
The N-to-N connecting device may include a step of confirming the call back request pattern and comparing the received caller number of the requester with a number of a call back number list registered in advance.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Next, specific examples of the present invention will be described with reference to the drawings.

FIG. 1 shows an example of the configuration of a system in which the present invention is implemented. The LAN-to-LAN connection device 1 to which many terminal devices are connected has a callback request function, and the LAN-to-LAN connection device 2 has a callback execution function and a callback number list. Both LAN connecting devices are connected via an ISDN network 3. Of course, the inter-LAN connecting device 2 can also be configured so that a callback request can be issued. Further, an individual device may directly connect to another device or LAN by ISDN.

FIG. 2 is a sequence outline diagram showing an outline of the execution of the callback request and the callback of the present invention. The inter-LAN connecting device 1 on the callback request side issues the call setting 6 to the inter-LAN connecting device 2 in order to start communication with the inter-LAN connecting device 2 on the callback executing side. At this time, the LAN-to-LAN connecting device 1 also writes a predetermined pattern indicating a predetermined callback request in the user / user information frame 5 of the ISDN and sends it to the LAN-to-LAN connecting device 2.

The LAN connection device 1 has a caller number 4
Is sent to the inter-LAN connecting device 2 by the caller number notification service of ISDN3. However, caller number 4 is ISD
N3 user It is also possible to write it in the user information and send it.

On the other hand, when the LAN connection device 2 on the callback execution side receives the call setting 6, the callback request pattern, and the caller number 4, it subsequently issues an opening sequence 7 to disconnect the communication. Subsequently, the inter-LAN connecting device 2 recognizes the call back request pattern sent by the inter-LAN connecting device 1 in addition to the call setting 6, and further, the caller number 4 of the call back requester is registered in advance for the call. After comparing with the numbers in the back number list and confirming that there is a matching number, a call setup sequence 8 for callback is issued to the call back requester. The callback requester issues a response sequence 9 followed by both L
Communication 10 is started between the AN connection devices.

LAN-to-LAN connection device 2 on the callback execution side
However, the timing for issuing the release sequence 7 and once disconnecting the communication may be after comparing with the numbers in the callback number list.

FIG. 6 shows the user user information frame structure. The user user information frame includes a user user information element identifier 11 (01111110) of one octet length,
It is composed of a user content length 12 of 1 octet length, a protocol identifier 13 of 1 octet length, and user information 14 of arbitrary octet length. Callback requesting LA
The N-to-N connection device 1 stores the pattern indicating the callback request in the user information 14 and issues it. The LAN-to-LAN connecting device 2 on the callback executing side reads the user information 14 and recognizes that the call setting is a callback request.

Next, the execution of the callback will be described with reference to the flowchart of FIG. The LAN-to-LAN connection device 2 on the callback execution side receives the user / user information data addressed to itself from the ISDN network 3. After that, the communication line is once disconnected. Then, if the received user-user information frame contains a pattern that indicates a call back request, the caller's number obtained from the caller ID service or from the user-user information frame is in the callback number list. Check if it matches the number in.

User If the user information frame does not contain a pattern indicating a call back request or the caller's number does not match the number in the list,
Return to the state of waiting for a callback request. If the caller's number matches the registered number in the list, the call-back operation starts and communication is started.

The flowchart of FIG. 4 shows an example in which the communication line is disconnected after the presence or absence of a pattern indicating a call back request and after comparing the received caller number with the numbers in the call back number list. User If the user information frame does not contain a pattern that requests a callback, or if the caller's number does not match the number in the list, disconnect the communication line and wait for a callback request. Return.

When the number of the sender matches the registered number in the list, the communication line is disconnected, the call back operation is started, and the communication is started. If the user information frame does not contain a pattern indicating a call back request, or if the caller's number does not match the number in the call-back number list, a predetermined signal is sent to the caller. For example, it is possible to shift to another incoming operation flow such as “new registration application processing” for a new registrant and enable processing required for registration (FIG. 5). Alternatively, if a pattern different from the callback request is identified in the user information frame, it is possible to start communication without a callback. It is also possible to use a flow for transferring to another LAN-to-LAN connecting device.

As described above, the LAN-to-LAN connecting device or the terminal equipment constituting the LAN can have both functions of requesting and executing the callback.

As described above, a pattern indicating the call back request information, which is a pattern for issuing a command (subsequent processing execution request), is written in the low-charge ISDN user user information frame, and the caller number ( By using the method of transmitting the (address information) by the caller ID notification service of ISDN without charge, the communication charge can be significantly reduced in the call back request. Further, technically, the call back request information can also be transmitted by the caller ID notification service of ISDN.

[0022]

INDUSTRIAL APPLICABILITY According to the present invention, the callback request data is IS
DN user Write in user information frame and send out,
Since the caller number is sent using the caller number notification service, the cost required for the callback request can be significantly reduced.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration example of a system in which the present invention is implemented.

FIG. 2 is a sequence outline diagram showing an operation example of a callback request and a callback execution.

FIG. 3 is an operation flowchart showing an example of callback execution.

FIG. 4 is an operation flowchart showing another example of callback execution.

FIG. 5 is an operation flowchart showing another example of callback execution.

FIG. 6 is a diagram showing a structure of a user user information frame of an ISDN user user information service.

[Explanation of symbols]

 1 Callback request-side LAN connection device 2 Callback execution-side LAN connection device 3 ISDN network 4 Caller number 5 User user information frame 6 Call setup information 7 Release sequence 8 Call setup sequence 9 Response sequence 10 Communication

Claims (9)

[Claims] 1. A pattern for indicating a callback request from a device on the callback request side or an inter-LAN connecting device is ISDN.
A method for requesting a callback, characterized by writing and sending in a user information frame. 2. The call back request method according to claim 1, wherein the caller number of the requester is sent together with the pattern by the caller number notification service of ISDN. 3. The call back request method according to claim 1, wherein the caller number of the requester together with the pattern is written and transmitted in a user user information frame of the ISDN. 4. The callback execution side device or the LAN-to-LAN connecting device confirms the pattern indicating the callback request and sets the caller number of the received requester as a number in a callback number list registered in advance. Claim 1 for comparison,
The callback request method described in 2 or 3. 5. The call back request method according to claim 4, which is executed in a system in which a plurality of LAN connecting devices are connected to an ISDN network. 6. The call back request method according to claim 4, which is executed in a system in which a terminal device and a computer are connected via an ISDN network. 7. The device according to claim 1, wherein the device on the callback side or the LAN-to-LAN connecting device sends a predetermined signal to the callback request side when the pattern indicating the callback request is not confirmed. Callback request method. 8. The callback request method according to claim 4, wherein the device on the callback execution side or the LAN-to-LAN connecting device disconnects communication when receiving data from the device on the callback request side or the LAN-to-LAN connecting device. 9. The device on the callback execution side or the LAN-to-LAN connecting device confirms the callback request pattern,
The call back request method according to claim 4, wherein after the caller number of the requester received is compared with the numbers in the call back number list registered in advance, the communication is disconnected.