JP2811509B2 - Remote maintenance method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote maintenance device for ISDN.
(Integrated Services Digital Network) Connects a line, usually operates as a digital office trunk, and at the time of remote control, operates as a remote control device, functions semi-independently to the exchange, and sends or sends a fault when the system goes down. The present invention relates to a remote maintenance system for preventing a line from being a dedicated line for remote control.

[0002]

2. Description of the Related Art FIG. 5 is a block diagram showing a configuration of a conventional remote maintenance system. In FIG. 5, 1 is a remote maintenance device, 2 is a subscriber circuit, 3 is a network, 4 is an office trunk, and 5 is an office line.

The leased line 7 is connected to the network 3 through a leased line trunk 6, and the central processing unit 8 controls connection of the network 3.

Next, the operation will be described. First , a public telephone network (not shown) accommodating the office line 5 from the remote maintenance device 1
A maintenance center (not shown) connected to
Connected to a private telephone network (not shown) that houses service line 7
To send a call to a maintenance center,
Captures the subscriber circuit 2 and dials the telephone number of the maintenance center.
Call me. Then, the central processing unit 8 uses the number to
Call a maintenance center connected to the public telephone network, or
Calls a maintenance center connected to the private telephone network
To analyze. That is, a maintenance center connected to the public telephone network
When calling, the line trunk 4 must be seized.
When calling the maintenance center connected to the telephone network, the dedicated line trunk 6 is captured and called until the maintenance center answers.

[0005] It should be noted that the maintenance center to be called is a public telephone network.
When connected to the body is an office line, directly, a configuration has been drawn to the remote maintenance system, to capture direct office line maintenance
There is also a method of transmitting to the center .

In the case of an incoming call from the remote maintenance device, the remote maintenance device responds to the call and prevents leakage of information by confirming a password from the other party.

[0007]

SUMMARY OF THE INVENTION The above-mentioned prior arts are exchangeable.
If a system failure occurs on the
Cannot send fault information to the maintenance center.
Incoming calls from the maintenance center are sent to the office trunk 4,
Pass through many circuits such as network 3 and subscriber line 2
As a result, there is a problem that it takes time and effort to pass through these circuits , and remote maintenance cannot be performed due to a failure of some of the circuits.

An object of the present invention is to function semi-independently from a switch, usually operate as a digital office trunk of an ISDN line, and operate as a remote maintenance device when an incoming call to an input / output device is made according to setup information. And directly,
By connecting to I / O devices, the circuit used for remote maintenance can be reduced, and in the event of a failure, the exchange can be independently called to multiple pre-registered maintenance centers.
It is an object of the present invention to provide a remote maintenance system capable of promptly transmitting information.

[0009]

SUMMARY OF THE INVENTION A remote maintenance system according to the present invention includes a central control unit and is connected via an ISDN telephone network.
Exchanges that are remotely maintained by the maintenance center
And is connected to the ISDN telephone network.
Remote maintenance equipment with the function of
When the maintenance center remotely maintains the exchange,
Is a remote maintenance device that operates independently of the exchange,
Connecting the central control device and the remote maintenance device,
Remote maintenance from the maintenance center via the ISDN telephone network
Remote maintenance system having an input / output device for performing
Incoming request from the ISDN telephone network to the remote maintenance device
Is received, the setup information
Analyzes the contents of the call information and determines that the incoming call is an incoming call for remote maintenance.
Or a general incoming call other than the remote maintenance incoming call
Discriminating means for discriminating and the discriminating means discriminating a general incoming call
The setup information is sent to the exchange.
And the discriminating means discriminates the incoming call for remote maintenance.
Automatically responds to the setup information
Sending response information to the ISDN telephone network,
A method for connecting the incoming call for remote maintenance to the input / output device.
Receiving fault information from the switch,
Send setup information to the DN telephone network and
Automatically call the specified maintenance center
To send the fault information to the maintenance center.
And harm information sending means .

[0010]

In the remote maintenance system according to the present invention, when the setup information from the network is determined to be a general incoming call, the setup information is transmitted to the exchange to operate as a digital office trunk of an ISDN line.

In the remote maintenance system, when a remote maintenance call is received from a network, the call is connected to an input device.

Further, it operates as a digital office line trunk of the ISDN line and transmits a call from the exchange. When a failure occurs, when the failure information is received from the exchange, the failure information is transmitted to a maintenance center registered in advance independently of the exchange. Thus, even if the failure of the exchange is a serious failure such as a system down, the failure information can be transmitted to the maintenance center, and the ISDN line is prevented from becoming a dedicated line for remote maintenance.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a remote maintenance system according to the present invention. FIG. 1 is a system configuration diagram showing the configuration of one embodiment.

In FIG. 1, the same parts as those in FIG. The network 3 and the central processing unit 8 for setting the communication path in FIG. 1 are the same as those in FIG.

Reference numeral 10 denotes a remote maintenance device connected to the ISDN line 12 of the public telephone network 13;
1 is a maintenance center.

A digital subscriber circuit 14 for interfacing between the maintenance center 18 and the network 3 is connected, and the digital subscriber circuit 14 and the maintenance center 18 are connected.
Are connected by a data communication line 22.

The maintenance terminal 17 is connected to the remote maintenance device 10 via a data line 34, the remote maintenance device 10 and the input / output device 15 are connected via a data line 33, and the system control device 16 and the remote maintenance device are connected. 10 are connected by a data line 35.

The input / output device 15 interfaces the exchange (central processing unit 8) and the remote maintenance device 10, and the system control device 16
This is to detect a failure in the exchange.

The input / output device 15 and the system control device 16 exchange data with the central processing unit 8 via the control system bus 11 of the exchange. The remote maintenance device usually operates as a digital office trunk.

FIG. 2 is a block diagram showing the internal configuration of the remote maintenance device 10. In FIG. 2, 41 is IS
The digital input / output circuit is connected to the DN line 12, and the data of the digital input / output circuit 41 is converted by the speed conversion circuit 30 into the speed of the exchange.

The speed conversion circuit 30 and the interface circuit 36 are switched by a switching circuit 42. The switching circuit 42 further connects the speed conversion circuit 30 and the speed matching circuit 31, and the speed matching circuit 31 and the interface circuit 36. Each is switched.

On the other hand, the speed matching circuit 31 is for transmitting and receiving data of the speed conversion circuit 30 or the interface circuit 36. The speed matching circuit 31 is connected to the input / output device 15 via the data line 33. I have.

A modulation / demodulation circuit 32 is connected to the maintenance terminal 17 via a data line 34. The modulation and demodulation circuit 32 is for transmitting and receiving data to and from the maintenance terminal 17.

Further, the interface circuit 36 is connected to the central processing unit 8 via a data line 40. The interface circuit 36 is connected to the remote maintenance device 10.
And the exchange, that is, the central processing unit 8, to transmit and receive data.

The fault information from the above exchange is sent to the data line 35.
Through the failure detection circuit 37. Reference numeral 39 denotes a storage circuit for storing various data of the program, various control information, and the like. Reference numeral 38 denotes a control circuit for controlling the entire remote control device 10.

FIG. 3 is a functional diagram at the time of transmission. In FIG. 3, reference numeral 18 denotes a maintenance center called first in a storage circuit 39 in the remote maintenance device 10, reference numeral 19 denotes a maintenance center called second, reference numeral 20 denotes a maintenance center called third, and reference numeral 21 denotes a last maintenance center. The maintenance center to call.

FIG. 4 is a functional diagram when a plurality of electronic exchanges are connected by CES (business group telephone). In this figure, 101-1 04 remote maintenance system, 50 is an electronic exchange is connected to a remote maintenance apparatus 101, also, the electronic exchange 51 to 53 are connected to the electronic exchange 50. The digital subscriber circuit 55 includes remote maintenance devices 102 to 104.
Is connected to

Next, the operation of the present invention will be described with reference to FIGS.
The description will be made by dividing into (1) to (7) with reference to FIG. (1) Operation as Digital Office Line Trunk When the exchange operates normally and no failure occurs, the remote maintenance device 10 operates as a digital office trunk connecting the ISDN line 12 and the exchange.

That is, the setup information enters the digital input / output circuit 41 of the remote maintenance device 10 via the ISDN line 12. The control circuit 38 is a digital input / output circuit 4
The setup information is received from 1 and the information is analyzed. If it is a general incoming call (an incoming call other than the incoming call for maintenance) , the setup information is transmitted from the control circuit 38 to the exchange via the interface circuit 36 and the data line 40. Is done.

The control circuit 38 is a speed conversion circuit 3
0 and the interface circuit 36 are connected by the switching circuit 42 to perform communication.

In the transmission from the exchange, the setup information is sent to the control circuit 38 via the interface circuit 36, and the control circuit 38 analyzes the information, and
In the case of the transmission to the ISDN line 12, the transmission to the ISDN line 12 is performed by the digital input / output circuit 41, and the speed conversion circuit 30 and the interface circuit 36 are transmitted by the switching circuit.
And communicate. (2) Remote maintenance from the maintenance center Setup information is transmitted from the maintenance center 19 to the control circuit 38 via the ISDN line 12 and the digital input / output circuit 41.

The control circuit 38 analyzes the information, and if it determines that the call is a connection call for the input / output device 15 (an incoming call for maintenance) , the control circuit 38 and the interface circuit 36 send a line to the exchange. Transmits the blocked information so that no call is transmitted from the exchange.

The control circuit 38 connects the speed conversion circuit 30 and the speed matching circuit 31 by the switching circuit 42,
The response information is transmitted to the line 12 via the digital input / output circuit 41, and the call is automatically answered.

At this time, the calling number of the setup information is stored in the storage circuit 39 of the remote maintenance device 10 as a partner confirmation function.
If the number matches the number of the maintenance center registered in, the connection is made. If the numbers do not match, release completion information can be transmitted. Thereby, the maintenance center 19 and the input / output device 15
Is connected to enable remote maintenance.

Next, when remote maintenance is performed from the maintenance center 18, set amplifier information is transmitted to the control circuit 38 via the data communication line 22, the digital subscriber circuit 14, the network 3, and the interface circuit 36.

The control circuit 38 analyzes the setup information, determines that the call is a remote control call, and stores the calling number in the storage circuit 3.
9, the interface circuit 36 is connected to the speed matching circuit 31 by the switching circuit 42, and response information is sent to the exchange (to the maintenance center 18). Communication between the devices 15 is enabled. (3) Transmission of fault information to the maintenance center The maintenance terminal 17 registers the demodulation circuit 32 from the maintenance terminal 17 via the data communication line 34, and the control circuit 38 registers the numbers of the plurality of maintenance centers in the storage circuit 39. The storage circuit 39 is configured to retain data even when power supply to the remote maintenance device 10 is cut off.

When a failure occurs in the exchange, the telephone number of the maintenance center is read from the failure detection circuit 32. Next, the control circuit 38 analyzes the line transmitted by the telephone number.
Outgoing calls to the office line (to the public telephone network 13).
In this case, the digital input / output circuit 41 sends the setup information added to the fault information to the ISDN
The data is transmitted to the public telephone network 13 via the line 12 .

When the response information is returned from the ISDN line 12, the control circuit 38 connects the speed conversion circuit 30 and the speed matching circuit 31 and connects the input / output device 15 by the switching circuit 42.

Then , the control circuit 38 informs the exchange via the interface circuit 36 that the line has been blocked, so that no call can be made to the line.

A maintenance center is provided at the exchange (own exchange).
Connected and the read maintenance center phone number is
In the case where transmission to the exchange is indicated, the control circuit 38 transmits, via the interface circuit 36, setup information to which the failure information is added to the exchange. The interface circuit 36 and the speed matching circuit 3 from the exchange
1 are connected by the switching circuit 42, and the maintenance center and the input / output device 15 are connected.

The maintenance center is called for a few seconds, and if there is no response, the calling is interrupted, and conversely, an incoming call from the called maintenance center is waited.

The maintenance center knows that a failure has occurred in the exchange of the remote maintenance device 10 based on the calling number of the received setup information and the additional information, and makes a call. The remote maintenance device 10 responds to the call and connects to the input / output device 15. (4) Transmission of Fault Information During Busy When the ISDN line 12 is connected to the exchange and all channels are connected, when the failure information is transmitted from the failure detection circuit 37 to the control circuit 38 in the exchange, the control circuit 38 stores the storage circuit 39
The information from the failure detecting circuit 37 is transmitted to the maintenance center by packet communication using the D channel to the maintenance center capable of performing packet communication registered in. When all the maintenance centers capable of performing packet communication have been called, the line is stopped and another registered maintenance center is called.

The ISDN line 12 is connected to the input / output device 15
Is connected, if a failure occurs, if the maintenance center cannot perform packet communication, the call is disconnected and a new call is issued to notify that a failure has occurred. (5) Transmission of Failure Information to Multiple Maintenance Centers When a failure occurs in the exchange, the remote maintenance device 10 calls the registered maintenance center 18 number from the storage circuit 39 and transmits the failure information. Make a call several times until the other party answers or the call is returned.

Next, the maintenance center 19 is called, the same processing as that of the maintenance center 18 is performed, and a call is made to the maintenance center 21.

When transmission to all the maintenance centers registered in the storage circuit 31 has been completed, the maintenance center to which no response or incoming call has been returned is called, and the call is transmitted again. The remote maintenance device 10 continues to make a call until all the registered maintenance centers answer or receive a call. (6) Registration from the maintenance center to the storage circuit of the remote maintenance device The maintenance center registers in the storage circuit 39 of the remote maintenance device 10 by a D-channel packet. If the number of the maintenance center registered in the storage circuit 39 matches the calling number from the setup information of the maintenance center, and the information indicating that the registration to the remote maintenance device 10 is not possible, a response is sent to the data of the maintenance center. Is stored in the storage circuit 39.

If the calling number does not match the registered telephone number or if no calling number is added, the call is not accepted and a release completion is transmitted. (7) When User Takes CES FIG. 4 shows a configuration in which CES connection is made. Remote maintenance device 101
In each of 保守 to １０４104, a maintenance center where the maintenance is performed or the same maintenance center is registered. For example, when a failure occurs in the electronic exchange 51, the remote maintenance device 102
This is notified to the digital subscriber circuit 55 which connects a plurality of lines, and the maintenance center can be called via the electronic exchange 50 and the remote maintenance device 101. The maintenance center can also call the remote maintenance device by the telephone number provided to the digital subscriber circuit 55.

Electronic exchange 5 connected to electronic exchange 50
When a failure occurs in multiple electronic exchanges among 1 to 53
Requests are issued to the remote maintenance device 101
It is. Even in such a case, the information is transmitted by the packet.
If a packet communication method that transmits information is used, communication
Nell never gets busy. If you have a CES connection
To the maintenance center using the packet communication method
It is desirable to be configured to notify. That is, the packet
With the communication system, all electronic exchanges
Each of the exchanges (multiple electronic exchanges) is connected to another electronic exchange.
Call to maintenance center without being affected by line usage
And promptly notify the maintenance center of the injury information .

As described above, the remote maintenance device that normally (when there is no failure) functions as a digital line trunk.
But, in the event of a failure or remote maintenance, because it acts as a remote maintenance device, it no to a remote control dedicated line, when operating as a remote maintenance system, an exchange
Operates independently, so that failure information can be transmitted even when the system is down.

Also, since the sender can be identified by the ISDN interface, information leakage can be easily prevented.

Conversely, when the maintenance center also receives an incoming call for failure information transmission, it is possible to solve the problem that a call charge is applied to the user by sending the call from the maintenance center instead of answering the call.

[0051]

As described above, according to the present invention, a remote maintenance device is usually used as a digital office trunk of an ISDN line, and operates independently of a switch only when a failure occurs or when a maintenance center arrives. In addition, since it is used as a remote maintenance device, there is no needless circuit and there is no need to make the ISDN line a dedicated line for remote control.

Further, when a failure occurs, the remote maintenance device operates independently of the exchange, so that there is an advantage that information can be transmitted even if the system of the exchange is down.

Further, since the ISDN line is used, the caller number can be known and the information can be protected. On the other hand, in the case of transmission of fault information, the maintenance center determines from the setup information that a fault has occurred. Knowing that the call is received by the remote maintenance device can also solve the problem that the user who owns the exchange receives a call charge.

In the case of CES connection, if an ISDN line is connected to the main electronic exchange, remote maintenance can be performed on other connected electronic exchanges without having to connect the line.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram of an embodiment of a remote maintenance system according to the present invention.

FIG. 2 is a block diagram of the remote maintenance device in FIG.

FIG. 3 is a functional diagram at the time of calling of the remote maintenance device of the present invention.

FIG. 4 is a functional diagram when the present invention is connected to a plurality of electronic exchanges by CES.

FIG. 5 is a block diagram showing a configuration of a conventional remote maintenance system.

[Explanation of symbols]

 Reference Signs List 3 network 8 central processing unit 10 remote maintenance device 12 ISDN line 13 public telephone network 14 digital subscriber line 15 input / output device 16 system control device 17 maintenance terminal 18-21 maintenance center 30 speed conversion circuit 36 interface circuit 37 failure detection circuit 38 Control circuit 39 Storage circuit 41 Digital input / output circuit

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H04M 3/00 H04M 3/08-3/40 H04M 7/00-7/16 H04Q 1/20-1 / 26

Claims (4)

(57) [Claims] A central control unit for controlling an ISDN telephone network;
Exchange that is remotely maintained from a maintenance center connected via
With the ISDN telephone network accommodated in the exchange.
Remote maintenance equipment that has the function of connecting line trunks
Where the maintenance center remotely maintains the exchange.
Remote maintenance equipment that operates independently of the exchange.
If, connects to the central controller and the remote maintenance system, the
Remote maintenance from the maintenance center via the ISDN telephone network
And an input / output device for performing the setup , wherein the setup information for receiving a call request from the ISDN telephone network is provided to the remote maintenance device.
Information, analyze the contents of the setup information
The incoming call is an incoming call for remote maintenance or the remote maintenance
For determining whether the call is a general incoming call other than the incoming call
If, in the case where the determination means has determined that the general incoming call, the cell
Means for transmitting to the exchange, and when the discriminating means determines that the incoming call is for remote maintenance.
Automatically responds to the setup information and the ISDN
Sends response information to the telephone network and
Means for connecting an incoming call for protecting the input device, when receiving the fault information from the exchange, and sends the setup information to the ISDN telephone network, to the maintenance center which is predetermined A remote maintenance system comprising: a fault information transmitting means for automatically calling and transmitting the fault information to the maintenance center. To 2. A front Symbol remote maintenance device, the maintenance center are registered more, the fault information sending means, a response to the previous SL automatically call from one of all the maintenance center, which is the registered 2. The remote maintenance system according to claim 1, wherein the maintenance center is sequentially called until the reception is received. 3. The maintenance center is provided with the remote maintenance device.
Receiving the fault information via the ISDN telephone network,
In case of failure of the exchange, said sending a setup information to the ISDN telephone network, characterized by comprising means for performing outgoing for remote maintenance in pairs to the remote maintenance apparatus The remote maintenance system according to claim 1. 4. The ISDN telephone network according to claim 1,
The setup information including the calling number, which is the telephone number of the
The remote maintenance device transmits the telephone number of the maintenance center to the remote maintenance device.
Storage means for storing the calling number from the ISDN telephone network.
Including the setup information,
Analyze the contents of the information and store it in the storage means
The calling number corresponding to the telephone number is the setup information
It is determined whether or not the incoming call is received from the ISDN telephone network.
2. The remote maintenance system according to claim 1 , wherein the incoming call is determined to be a guard incoming call .