JP2739526B2 - Remote terminal maintenance control method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an integrated service digital
The present invention relates to a remote terminal maintenance control method for a communication terminal device in a network.

[0002]

2. Description of the Related Art In a conventional remote terminal maintenance control device, as described in Japanese Patent Application Laid-Open No. 64-36191, the remote maintenance device requests maintenance information to a user information element of a connection message or requests control. If the additional information of the information setting request is inserted and transmitted, and the terminal device having received the additional information is the maintenance information, the terminal device inserts the collected maintenance information into the user information element of the message. A method is employed in which the information is transmitted to the remote maintenance terminal, and when the additional information is a control information setting request, the control information is set and transmitted.

[0003]

As described above, in the conventional remote terminal maintenance control system, the remote maintenance device adds the additional information of the maintenance information request or the control information setting request to the user / user information element of the connection message. Since the terminal device is configured to insert and transmit the service information and receive it, the maintenance information is inserted into the user information element of the release completion message and transmitted to the remote maintenance device. During the B-channel communication, the maintenance information cannot be transmitted / received. To perform this, the user must wait for the communication to end.

In one call connection process, a request for maintenance information from a remote maintenance device and a transmission of maintenance information from a communication terminal device can be performed only once, respectively. For example, the maintenance information amount is 128
When the number of octets is exceeded, call connection processing is required again, and there is a problem that remote maintenance efficiency is poor.

[0005] The present invention has been made in order to solve the above problems.
Provides a communication terminal maintenance control method that can perform remote maintenance even while the communication terminal device is communicating, and can transmit and receive maintenance information multiple times even with one call connection process, and does not limit the amount of maintenance information It is intended to do so.

[0006]

In order to achieve the above object, a remote terminal maintenance control system according to the present invention comprises a communication terminal device.
A remote maintenance device for maintaining the communication terminal device;
And a sub-address from the remote maintenance device.
Receiving a call request packet that includes
A call setup message storing a dress
Has the function of setting up a data link for communication
Remote terminal maintenance control method consisting of integrated service digital network
In the formula, the remote maintenance system, to set the maintenance communication sub-address for identifying the incoming call for the purpose of maintenance
A setting unit that, maintenance communication set by said setting means
The call request packet including the destination subaddress is
Calling means for sending to a service digital network, and maintenance information of the communication terminal device , wherein the communication terminal
Storage means for transmitting a maintenance communication destination sub-address to the communication terminal device.
When, upon receiving the call setup message, extracts the sub-address of the call setup message, in said storage means
Ri collated with the stored maintenance communication subaddress
To identify whether it is for data communication or maintenance communication
Identification means, and that the identification means
, And establishes a data link for maintenance communication with the integrated service digital network, and maintains the data link based on the maintenance information stored in the received D-channel packet.
Means for performing a protective operation .

[0007]

According to the D-channel packet communication, line switching and packet switching are performed in a state where a plurality of communication terminal devices are connected to one line, and maintenance communication can be performed even during the B-channel communication state.

[0008] Then, the maintenance communication destination sub-address is identified by the maintenance destination sub-address collation means of the communication terminal device provided in addition to the data communication destination sub-address collation means. Erroneous connection of the incoming call and the incoming data communication to the own device are prevented.

When the incoming call is identified as a maintenance incoming call, the call control and the data communication are prevented from being affected by a data link different from the data communication set by the maintenance communication data link setting means. Is done.

[0010] Thus, in the network layer having a line function up to the data link layer, complicated multiplex processing necessary for identifying the incoming call for maintenance communication and data communication by treating data communication and maintenance communication in the same manner. The maintenance communication is performed without setting a new network layer for identifying the data communication and the maintenance communication by avoiding the processing delay.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

FIG. 1 shows a system configuration of the present invention. In the figure, the communication terminal devices 1 to 3 and the remote maintenance device are integrated.
It is connected to a service digital network (hereinafter referred to as ISDN) 4. Further, the remote maintenance device 5 includes a setting unit for setting a destination sub-address for maintenance communication. Then, the maintenance communication is performed by a call from the remote maintenance device 5,
After the SDN 4 is connected to the communication terminals 1 to 3, the communication is performed by D-channel packet communication.

Next, the maintenance communication processing performed in the above system configuration will be described.

FIG. 2 shows a remote maintenance sequence in this embodiment.

This sequence includes communication terminals 1 to 3 at the data link level on the ISDN D channel,
2 shows transmission and reception between the ISDN 4 and the remote maintenance device 5.

In this embodiment, the unnumbered information UI, the extended asynchronous balanced mode setting SABME, and the unnumbered confirmation U
I, information I, and disconnect DISC are specified in CCITT recommendation Q921 . The UI, the call setup message, the response message, the release message, and the release completion message in I are defined in Recommendation Q931, and the call request packet, the incoming packet, the incoming call reception packet, the connection completion packet, and the data packet in I , A recovery request packet, a disconnection instruction packet, a disconnection confirmation packet, and a recovery confirmation packet are defined in CCITT Recommendation X25.

In FIG. 2, the remote maintenance device 5 is an ISD
After sending the SABME to N4 and receiving the UA, it sets up a data link and sends a call request packet I including a maintenance destination subaddress (steps 1 to 3). As a result, the ISDN 4 sends the call setting message to which the maintenance destination sub-address is added to the communication terminals 1 to 3 (step 4). Communication terminals 1 to which this call setup message is received
No. 3 is a SABM in which a maintenance TEI is added to ISDN4.
After transmitting E and receiving the UA, a data link for call setup is established and a response message I is transmitted (steps 5 to 5).
7). Thereafter, ISDN4 sends a release message,
After transmitting the release completion message, the communication terminal devices 1 to 3
DISC is transmitted to receive the UA and disconnect the call control data link (steps 8 to 11).

Next, the ISDN 4 sends out the SABME to which the maintenance TEI is added and receives the UA from the communication terminals 1 to 3, and then sets up the maintenance communication data link and sends out the incoming call packet. (Steps 12-14). The communication terminal devices 1 to 3 which have received the incoming packet receive the incoming call.
The ISDN 4 which has transmitted the attached packet and received it transmits a connection completion packet to the remote maintenance device 5 (steps 15 and 16).

After the above operation, the remote maintenance device 5 sets a maintenance information request in the user data of the data packet and sends it to the communication terminal devices 1 to 3 via the ISDN 4 (steps 17 and 18). The communication terminal devices 1 to 3 which have received the maintenance information request set a maintenance information response to the maintenance information request in the user data of the data packet and transmit the user data (steps 19 and 20). Upon receiving this maintenance information response, the remote maintenance device 5 sends a maintenance information request if other maintenance information is required, and sends a recovery request packet if it is not necessary (step 21).

After that, the ISDN 4 sends a disconnection instruction packet, and the communication terminals 1 to 3 which have received the disconnection instruction packet send out the disconnection confirmation packet and then send out the DISC to receive the UA and disconnect the data link for maintenance communication. I do. Finally, IS
The DN 4 sends a recovery confirmation packet, and the data communication for remote maintenance ends (steps 22 to 26).

Next, the operation of maintenance communication in the communication terminals 1 to 3 will be described.

FIG. 3 shows a control flowchart (1) of the communication terminals 1 to 3, and FIG. 4 shows a control flowchart (2).

In FIG. 3 and FIG.
-3 send the call setup message in step 4 of FIG.
Upon receipt from N4 (step S1), the destination sub-address matching unit checks whether the destination sub-address in the message matches the set destination sub-address (step S2). If the setting value does not match, the process ends without responding to the incoming call (step S3). If the setting value matches the setting value, it is next checked whether the destination sub address is for maintenance communication or data communication (step S4). ).

If the destination sub-address matches the set value for data communication, the flow shifts to data communication processing (step S).
5). Subaddress is not consistent with the maintenance communication setting value
If so , a call control data link is set, a response message is sent, a release complete message is sent in response to the release message from ISDN 4, and the maintenance call control data link is disconnected to enter maintenance communication (step S6). To S11).

With the above processing, the maintenance communication data link is set from the ISDN 4 (step S12). Then, when the incoming call packet is received after the data link for maintenance communication is set, the incoming call reception packet is transmitted (steps S13 and S14). Thereafter, when a maintenance information request is received by a data packet, a maintenance information response is transmitted by a data packet to the request (step S1).
5, S16). When receiving the reset instruction packet, it transmits a reset confirmation packet and a restoration request packet, and receives a restoration confirmation packet (steps S17 to S17).
20). When the restart instruction packet is received, a restart confirmation packet is transmitted (steps S21 and S2).
2). When the disconnection instruction packet is received, a disconnection confirmation packet is transmitted (steps S23 to S24).

After each of these processes, the maintenance communication data link is disconnected, and the remote maintenance communication ends (step S25).

[0027]

According to the present invention, the incoming call for maintenance is identified by comparing the incoming sub-address in the call setup message with the incoming call sub-address for maintenance communication. , And maintenance communication is performed by D-channel packet communication. Therefore, erroneous connection with another device and erroneous connection of data communication to the own device can be prevented without setting a new network.
In addition, maintenance communication can be performed without affecting other communication.

[Brief description of the drawings]

FIG. 1 is a diagram showing a system configuration of the present invention.

FIG. 2 is a diagram showing a remote maintenance sequence in the embodiment.

FIG. 3 is a diagram illustrating a control flowchart (1) of the communication terminal device.

FIG. 4 is a diagram illustrating a control flowchart (2) of the communication terminal device.

[Explanation of symbols]

1-3 Communication terminal device 4 Integrated Services Digital Network (ISDN) 5 Remote maintenance device

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toshimitsu Sasaki 94, Kojiyama-shi, Fukushima Prefecture, within the facility of Hitachi Telecom Technology Inc. (72) Inventor Fumio Akiyama 1-Horiyamashita, Hadano-shi, Kanagawa Prefecture (72) Inventor Junichi Fukui 1-6-1, Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (56) References JP-A-4-77142 (JP, A) JP-A-4-170125 (JP, A) JP-A-4-183047 (JP, A) JP-A-64-22196 (JP, A)

Claims (1)

(57) [Claims] 1. A communication terminal device , and the communication terminal device is maintained.
Remote maintenance devices to accommodate them and
Call request packet including the destination subaddress from the remote maintenance device.
When a call setup message is received, the call setup
Message to the communication terminal device, and the communication data
Service digital network with the function of setting links
In remote terminal maintenance control system consisting of the remote maintenance system, setting means for setting a maintenance communication subaddress that identifies the incoming call for the purpose of maintenance
And the sub-address for maintenance communication set by the setting means.
The call request packet including the address
Calling means for sending to the mobile network, and maintenance information of the communication terminal device .
Information to the communication terminal device by a D-channel packet
And a maintenance communication unit for storing a maintenance communication destination sub-address in the communication terminal device.
Storage means for receiving the call setup message,
Extract the sub-address of the call setting message, the
Compares with the maintenance communication destination sub-address stored in the storage means, and checks whether to receive data communication or maintenance communication.
Identification means for identifying whether or not maintenance communication
When recognizing that there is an incoming call, a data link for maintenance communication is set up with the comprehensive service digital network, and the data link is received.
The maintenance information stored in the D-channel packet
And a means for performing a maintenance operation based on the information .