JP2880699B2 - Communication terminal device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication terminal device connected to an ISDN (Integrated Services Digital Communication Network) or the like and having a terminal remote maintenance control function.

[0002]

2. Description of the Related Art In a company or the like, for example, when important information is transmitted between parts spread over a wide area in the same business office, the information is transferred via a public switched network or a private branch exchange network. Data exchange systems are often used.

[0003] This is because, from the viewpoint of realizing quick and reliable transmission of information, it is very advantageous over other information transmission methods. In recent years, following the start of ISDN services,
In many cases, a digital data exchange system based on ISDN or the like that performs higher-speed and higher-density information transfer is adopted.

In a data exchange system connected to a public switched network or a private switched network as described above, a maintenance test function of a terminal device belonging to each of the terminal devices belonging to the system is provided. Centralized management on the network side via the subscriber line to which each of those terminal devices is connected,
Specifically, a maintenance test system device provided on the network side
A centralized maintenance method is adopted in which a maintenance test performed periodically or when a failure occurs, that is, a result of a failure diagnosis test is centrally managed in all terminal devices belonging to the system.

On the other hand, in a digital data exchange system based on ISDN or the like, each terminal device and each exchange are
Since the functions are enhanced in accordance with the level of the SDN, if the quality management of the own terminal device is performed in each terminal device, the maintenance information including the data and the like is collected by each terminal device. It is possible.

[0006] The maintenance information of the own terminal device collected by each of the terminal devices is displayed using the display function of each terminal device, or is connected to the above-mentioned public telephone network or private branch exchange network. Using a maintenance management device similar to the maintenance test system device in the data exchange system, the maintenance information of each terminal device is intensively collected by a maintenance management function on the digital data exchange network side such as ISDN, and the terminal device of the entire network is collected. It can be managed comprehensively.

[0007]

For example, the above-mentioned ISDN
A user who uses a plurality of terminal devices accommodated in a digital data exchange network to transmit information between one another in the same business establishment can use all of the terminal devices located in that business establishment. It is desirable to confirm the normality.

[0008] This is because when a user who uses the data exchange system operates such that important information is frequently exchanged between the terminal devices, a trouble occurs in the transmission of the data, so that the data is quickly transmitted. The purpose of this is to prevent the intended purpose of the proper transmission from becoming unachievable, and also to make it possible to resolve the trouble immediately if any trouble occurs.

As described above, in a conventional digital data exchange system based on ISDN or the like, maintenance information relating to quality management and the like is provided to its own terminal device implemented for each terminal device, and the maintenance management device and the like on the network side. , Can be collectively and remotely managed over the entire network.

However, in the above-mentioned conventional digital data exchange system based on ISDN or the like, when the maintenance information on the terminal devices is centrally managed remotely, all the terminal devices belonging to the digital data exchange system are provided on the network side. Is to be centrally managed.

[0011] For this reason, maintenance information on each user who is transmitting data using the above-mentioned system, that is, for example, a plurality of terminal devices used in each business office is provided for each user (business office). There is no means for individual management, and there is a problem that it is difficult to take measures corresponding to the actual situation when a trouble occurs.

The problem is not limited to the collection of maintenance information, but also the collection of results related to a failure diagnosis test performed periodically or when a failure occurs in each terminal device, for example, an attribute set for each terminal device. This is also a common problem with regard to setting of control information such as changing of the control information.

[0013] Accordingly, an object of the present invention is to collect maintenance information and failure diagnosis tests on all terminal devices used by each user using the digital data exchange system, and to set control information. Communication terminal equipped with a terminal remote maintenance control function, which can centrally perform maintenance control of the terminal remotely, and thus can centrally manage all terminal devices used by each user. It is to provide a device.

[0014]

According to the present invention, in order to achieve the above object, maintenance control information for a destination communication terminal of the call setup message is inserted into a destination subaddress information element of the call setup message. A communication terminal device for communicating via a digital exchange network with a remote maintenance terminal device for transmitting the same, wherein a call setup in which the maintenance control information is inserted in a destination subaddress information element from the remote maintenance terminal device. Diagnosing means for receiving the message and diagnosing the own communication terminal device, and inserting the diagnosis result information by the diagnosing device into the calling subaddress information element of the call setting message and sending it to the remote maintenance terminal device And means for performing the operation.

According to the present invention, a terminal device having a remote maintenance terminal control function, which is set in a plurality of terminal devices used by each user, is configured as described above. Maintenance control is remotely performed on the other terminal devices, and maintenance result information on the other terminal devices is collected.

Therefore, the maintenance control of the terminal device used by each user can be performed by each user, and all the terminal devices used by each user can be controlled by the user. Can be managed centrally.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS.

In this embodiment, data transmission is performed by a certain user using a digital data exchange network, and a plurality of terminal devices for performing the data transmission are provided in the user. In a case where the remote control is provided within the user, maintenance control such as collection of maintenance information and a failure diagnosis test for all of the terminal devices and setting of control information is performed. Centrally managed remotely by a terminal device having a maintenance control function (hereinafter referred to as a remote maintenance terminal device).
This is a case where, for each user, all terminal devices used by that user are centrally managed remotely. 1. Overall Configuration (FIGS. 1 and 2) FIG. 1 is a schematic configuration diagram schematically showing a digital data exchange system having a terminal remote maintenance control function according to an embodiment of the present invention.

In FIG. 1, reference numeral 10 denotes a digital data exchange network based on, for example, ISDN, and reference numeral 20 denotes, for example, a terminal device provided in an arbitrary number for transmitting information between each place in one business office. The terminal device 20 has a configuration capable of collecting maintenance information such as quality management data of the terminal device 20 and has a maintenance test function of performing a failure diagnosis test of the terminal device 20 periodically or when a failure occurs. Have.

Reference numeral 30 designates maintenance information and a failure diagnosis test for all the terminal devices 20 which are disposed in a user who uses the above terminal devices, for example, in the above-mentioned office, and which are used by the user. This is a remote maintenance terminal device for remotely performing maintenance control such as collection of data related to the result maintenance test and setting of control information. For each user, all terminal devices 20 used by that user are centralized. It is for management.

FIG. 2 is a schematic diagram showing a specific example of a digital data exchange system having a terminal remote maintenance control function according to an embodiment of the present invention.

In FIG. 2, reference numerals 12 and 14 denote subscriber lines connected to the digital data exchange network 10, and reference numerals 16 and 18 denote user-side network termination units (NT) connected to the subscriber lines 12 and 14, respectively. And two terminal devices (TE1, TE1) are connected to one network terminating device (NT) 16 via a dedicated line 42.
2) Remote maintenance terminals (TE0) 30 are connected to the other network terminating devices (NT) 18 via dedicated lines 44, respectively. 2. Format of Call Setup Message (SETUP) (FIGS. 3 (a) and 3 (b)) In the digital data exchange system having the terminal remote maintenance control function according to the present embodiment, a request for information related to the maintenance, etc. The transmission of maintenance control information relating to the "sub-address information element" in the call setup message (SETUP) sent from each of the remote maintenance terminal (TE0) 30 and the terminal 20 to request a connection between them. ”And“ source sub-address information element ”.

Therefore, the call setting message (SETU)
The format P) will be described with reference to FIG.

FIG. 3 shows the remote maintenance terminal (TE) shown in FIG.
0) 30, when performing maintenance control such as collection of maintenance information and data on a maintenance test as a result of a failure diagnosis test and setting of control information for each terminal device 20, the remote maintenance terminal device (TE 0) 30 A layer 3 call setup message (SETU) sent to the device 20 (or vice versa) via the digital data exchange network 10.
P) shows the format.

FIG. 3A shows a remote maintenance terminal (TE).
0) from 30 to the digital data exchange network 10, and
A layer 3 call setup message (SE) transmitted from the digital data exchange network 10 to each terminal device 20
TUP) format, and the following three elements are arranged following the elements of “protocol identifier”, “call number”, “message type”, and “transmission capability”.

First, as a first element, a "calling number information element" indicating the subscriber number of the remote maintenance terminal (TE0) 30, which is the source of the call setup message (SETUP), is arranged.

Next, as a second element, the terminal device 20 which is the destination of this call setup message (SETUP)
"Destination number information elements" indicating the subscriber numbers are arranged.

Finally, as a third element, a specific terminal device (for example, the terminal device (for example, the terminal device ( When the destination is TE1) 22), a “destination subaddress information element” indicating a subaddress that designates the specific destination is arranged.

The above "destination subaddress information element" is 3
Each of these areas is described below.

First, an "information element identifier" indicating that this information element is a "destination sub-address information element" is stored in the first area, and the "destination sub-address information element" is stored in the second area. The "information element content length" indicating the bit length of the information such as the sub address transmitted by "."

Finally, in the third area, "sub-address and instruction data" indicating the sub-address of the specific terminal device (for example, the terminal device (TE1) 22) are arranged. And instruction data ”, the collection of maintenance information and a failure diagnosis test performed by the remote maintenance terminal device (TE0) 30 for a specific terminal device (for example, the terminal device (TE1) 22) having the subaddress indicated here. And instruction data indicating the contents of maintenance control such as setting of control information.

FIG. 3B shows the maintenance inserted in the call setup message (SETUP) transmitted from the remote maintenance terminal (TE0) 30 to the terminal 20 shown in FIG. Depending on the contents of the control, the terminal device 20 enters the digital data exchange network 10 and the digital data exchange network 10 enters the remote maintenance terminal (TE0) 30.
Indicates a format of a call setup message (SETUP) by the layer 3 which is transmitted according to “protocol identifier”, “call number”, “message type”,
The following elements are arranged following each element of the “transmission capability”.

First, a "calling number information element" indicating the subscriber number of the terminal device 20, which is the source of the call setup message (SETUP), is arranged as a first element.

Next, as a second element, of the plurality of terminal devices 20 corresponding to the subscriber number of the transmission source indicated in the “calling number information element”, a specific terminal that actually transmits this message is specified. The “source subaddress information element” indicating the subaddress of the device (for example, the terminal device (TE1) 22) is arranged.

Finally, as a third element, a "destination number information element" indicating the subscriber number of the remote maintenance terminal (TE0) 30, which is the destination of the call setup message (SETUP), is arranged. .

The "source subaddress information element" is 3
It is composed of two elements, each of which will be described below.

First, an "information element identifier" indicating that this information element is an "originating subaddress information element" is stored in the first area, and the "originating subaddress information element" is stored in the second area. The "information element content length" indicating the bit length of the information such as the sub address transmitted by "."

Finally, in the third area, a "sub address and return data" indicating a sub address of the specific terminal device (for example, the terminal device (TE1) 22) are arranged. The "data" includes the remote maintenance terminal (TE0) returned from a specific terminal having the subaddress shown here (for example, the terminal (TE1) 22) to the remote maintenance terminal (TE0) 30. ) Return data corresponding to the content of the maintenance control from 30 is inserted. 3. Terminal (TE0) by remote maintenance terminal (TE0)
Centralized remote management operation of terminal device by the system (FIGS. 4 and 5) As described in the previous section, the remote maintenance terminal device (TE0)
The terminal 30 transmits the maintenance control information by using the area of the “destination subaddress information element” of the call setup message (SETUP) sent to the terminal device 20, and
Responds to the maintenance control information from the remote maintenance terminal (TE0) 30 using the "calling subaddress information element" area of the call setup message (SETUP) to the remote maintenance terminal (TE0). And transmission of maintenance results.

Therefore, the remote maintenance terminal (TE0) 30
A specific example of the remote centralized management operation of the terminal device 20 according to the above will be described below.

3- (1). Failure diagnosis test result request (FIGS. 4 and 5) First, the remote maintenance terminal (TE0) 30
A description will be given of an example in which a failure diagnosis test result is requested for 0 and collected, with reference to FIGS. 4 and 5.

3- (1) a. 4. Request for Result of Failure Diagnosis Test at the Time of Failure (FIG. 4) FIG. 4 shows that when a failure occurs at the terminal device 20, the remote maintenance terminal (TE0) 30 requests the terminal device 20 for a failure diagnosis test result. FIG. 4 is a control sequence diagram of each of the digital data exchange network 10, the terminal device 20, and the remote terminal device 30 (TE0) when the data is collected.

According to this, when any trouble occurs in the terminal device 20 and the remote maintenance terminal device (TE0) 30 makes a call to request the terminal device 20 to transmit a failure diagnosis test result, the remote maintenance terminal device (TE0) 30 makes a call. A terminal device (eg, a terminal device (T) that requests a result of a failure diagnosis test from the terminal device (TE0) 30 to the digital data exchange network 10.
E1) A call setup message (SETUP) M102 indicating a connection request to 22) is transmitted.

Then, a call setup message (SETUP) M104 having the same contents as the above M102 is sent from the digital data exchange network 10 to the terminal device 20 of the destination, and the remote maintenance terminal device (TE0) 30 is sent to the remote maintenance terminal device (TE0) 30. Then, a call setting acceptance message (CALLPROC) M106 indicating that the connection request has been accepted is transmitted.

Incidentally, the call setup messages (SETUP) M102 and M104 transmitted here are shown in FIG.
In the area of “sub-address and instruction data” in the format shown in FIG. 7, the sub-address of the terminal device (for example, the terminal device (TE1) 22) for which the result of the failure diagnosis test is requested, and the fact that the result of the failure diagnosis test is requested And the indicated instruction data.

That is, the request for the failure diagnosis test result from the remote maintenance terminal (TE0) 30 to the terminal 20 is sent by the call setup message (SETUP) M102,
This is performed using the area of the “destination sub-address information element” of M104.

On the other hand, the terminal device 20, which has received the call setup message (SETUP) M104 from the digital data exchange network 10, recognizes that the received message is a failure diagnosis test request, and immediately A diagnostic test is performed, and a release completion message (RELCOM) is sent to the digital data exchange network 10.
P) Send M108.

This release completion message (RELCOM)
P) The digital data exchange network 10 receiving the M108 sends the remote maintenance terminal (TE0) 30 to the terminal 2
0, indicating the end of the connection request to the connection message (D
ISC) M110, and the disconnection message (DI
SC) Remote maintenance terminal device (TE0) receiving M110
30 sends a release message (REL) M112 to the digital data exchange network 10.

Then, the release message (REL) M
The digital data exchange network 10 receiving the 112 sends a release completion message (RELCOMP) M114 to the remote maintenance terminal (TE0) 30. As a result, the remote maintenance terminal (TE0) 30
It is in a state of waiting for the reception of the failure diagnosis test result from.

While these controls are being performed, the terminal device 20 has the remote maintenance terminal device (TE) as described above.
0) 30 based on the request from the remote maintenance terminal (TE0) 30, and the remote maintenance terminal (TE0) 30 sends a release completion message (RE) from the digital data exchange network 10.
(LCOMP) After receiving the M114, the terminal device 20 enters the reception standby state for the failure diagnosis test result. Then, the terminal device 20 transmits a remote maintenance terminal device (not shown) to the digital data exchange network 10 to notify the result of the failure diagnosis test. A call setup message (SETU) indicating that a connection to the
P) Send M116.

Upon receiving the call setup message (SETUP) M116 from the terminal device 20, the digital data exchange network 10 transmits the call setup message (SETUP) M118 having the same contents as the M116 to the remote maintenance terminal (TE0) 30. To the terminal device 20
Sends a call setup acceptance message (CALLPROC) M120 indicating that the connection request has been accepted.

The call setting messages (SETUP) M116 and M118 sent here are the terminals that send the results of the failure diagnosis test to the “subaddress and return data” area in the format shown in FIG. 3B. The sub-address of the device (for example, the terminal device (TE1) 22) and data on the result of the failure diagnosis test are inserted.

That is, the transmission of the failure diagnosis test result for the terminal device 20 to the remote maintenance terminal device (TE0) 30 is performed by the above-mentioned call setup message (SETUP) M116, M
This is performed using the area of the “originating sub-address information element” 118.

The digital data exchange network 10
Based on the reception of the call setup message (SETUP) M118, the remote maintenance terminal (TE0) 30 performs the process of receiving the failure diagnosis test result from the terminal 20, and completes the release to the digital data exchange network 10. A message (RELCOMP) M122 is transmitted.

This release completion message (RELCOM)
P) The digital data exchange network 10 receiving the M122 sends the remote maintenance terminal (TE0) 3 to the terminal 20.
0, indicating the end of the connection request to the connection message (D
ISC) M124, and the disconnection message (DI
SC) The terminal device 20 receiving the M124 sends a release message (REL) M to the digital data exchange network 10.
126 is sent.

Further, the release message (REL) M1
26, the digital data exchange network 10 receives the release completion message (RELCOMP) to the terminal device 20.
Send M128. Thereby, the terminal device 20 returns to the initial state.

As described above, when a failure occurs in the terminal device 20, the remote maintenance terminal device (TE0) 30 requests and collects a failure diagnosis test result in each of the arbitrarily designated destination terminal devices 20. Therefore, for each user, it is possible to collect and manage the failure diagnosis test results of all the terminal devices 20 used by the user.

As described above, when a failure occurs in the terminal device 20, the remote maintenance terminal device (TE0) 30
, Requesting a failure diagnosis test result, and ending the description of the control sequence when collecting the result.

3- (1) b. Request for Result of Failure Diagnosis Test Performed Periodically (FIG. 5) Next, FIG. 5 shows the result of the failure diagnosis test periodically performed in the terminal device 20 as a result of the remote maintenance terminal device (TE
FIG. 2 is a control sequence diagram of each of the digital data exchange network 10, the terminal device 20, and the remote terminal device 30 (TE0) when the data is collected from the terminal device 20 by the terminal device 0).

According to this, when a periodic failure diagnosis test is performed in each terminal device 20, a call setup message (SETUP) requesting the result of the failure diagnosis test is sent from the remote terminal device (TE0) 30. A call setup message (SETUP) indicating that the terminal device 20 requests the digital data exchange network 10 to connect to the remote terminal device (TE0) 30 in order to notify the result of the failure diagnosis test without receiving the signal. M202 is sent out.

The digital data exchange network 10 receiving the call setup message (SETUP) M202 from the terminal device 20 transmits the call setup message (SETUP) M204 having the same contents as the M202 to the remote maintenance terminal (TE0) 30. To the terminal device 20
Sends a call setting acceptance message (CALLPROC) M206 indicating that the connection request has been accepted.

The call setting messages (SETUP) M202 and M204 sent here are the terminals that send the results of the failure diagnosis test to the “subaddress and return data” area in the format shown in FIG. 3B. The sub-address of the device (for example, the terminal device (TE1) 22) and data on the result of the failure diagnosis test are inserted.

That is, the transmission of the failure diagnosis test result relating to the terminal device 20 to the remote maintenance terminal device (TE0) 30 is performed by the above-mentioned call setup message (SETUP) M202, M
This is performed using the area of the “source subaddress information element” 204.

The digital data exchange network 10
Based on the reception of the call setup message (SETUP) M204 from the remote maintenance terminal (TE0) 30, the remote maintenance terminal (TE0) 30 performs the process of receiving the failure diagnosis test result from the terminal 20, and completes the release to the digital data exchange network 10. A message (RELCOMP) M208 is transmitted.

This release completion message (RELCOM)
P) The digital data exchange network 10 that has received the M208 sends the remote maintenance terminal (TE0) 3 to the terminal 20.
0, indicating the end of the connection request to the connection message (D
ISC) M210, and the disconnection message (DI
SC) The terminal device 20 receiving the M210 transmits a release message (REL) M to the digital data exchange network 10.
212 is sent.

Further, the release message (REL) M2
The digital data exchange network 10 which has received the message 12 transmits a release completion message (RELCOMP) to the terminal device 20.
M214 is transmitted. Thereby, the terminal device 20 returns to the initial state.

As described above, the remote maintenance terminal (TE0)
30 can collect from each of the terminal devices 20 the failure diagnosis test results that are periodically performed in all of the terminal devices 20 used by each of the users. Can collect and manage the failure diagnosis test results of all the terminal devices 20 used in.

The description of the control sequence when the remote maintenance terminal device (TE0) 30 collects the result of the failure diagnosis test periodically performed in the terminal device 20 from the terminal device 20 is completed. 3- (2). Maintenance Information Request Up to this point, the case where the remote maintenance terminal device (TE0) 30 collects the result of the failure diagnosis test from each terminal device 20 has been described. When collecting information,
Is performed in the same sequence as the control sequence shown in FIG.

However, the remote maintenance terminal (TE0) 30
In the case of collecting the maintenance information by the user, the call setting messages (SETUP) M102 and M104 in FIG. 4 are provided in the area of the “sub-address and instruction data” in the terminal device (eg, the terminal device (TE1 ) 2
The sub-address of 2) and the data requesting the return of the maintenance information are inserted.

The call setting message (S
ETUP) M116 and M118 insert the subaddress of the terminal device (for example, the terminal device (TE1) 22) that returns the maintenance information and the data relating to the maintenance information into the “subaddress and return data” area. .

The terminal device 20 transmits a call setup message (SETUP) M1 from the digital data exchange network 10.
Based on the reception at step 04, maintenance information such as quality management data collected by the terminal device 20 is transmitted to the digital data exchange network 10 by a call setup message (SETUP) M116.

Then, the call setting message (SETU)
P) Digital data exchange network 10 receiving M116
Is a call setup message (SE
TUP) M118 is connected to the remote maintenance terminal (TE0) 3
0, and the maintenance information in the terminal device 20 is collected in the remote maintenance terminal device (TE0) 30.

That is, the transmission of the maintenance information request from the remote maintenance terminal device (TE0) 30 to the terminal device 20 is performed by using the area of the "call destination sub-address information element" of the call setup messages (SETUP) M102 and M104. On the other hand, the transmission of the maintenance information of each terminal device 20 from the terminal device 20 to the remote maintenance terminal device (TE0) 30 is performed by the call setting message (SETUP) M11.
6. The processing is performed using the area of the “source subaddress information element” of M118.

Then, M102 to M12 in FIG.
8 is transmitted by the digital data exchange network 10
And the remote maintenance terminal device (TE0) 30, the terminal device 20 returns to the initial state.

As described above, the remote maintenance terminal (TE0)
30 can request and collect the maintenance information of each terminal device 20 of the arbitrarily designated destination, and therefore, for each user, the maintenance information of all the terminal devices 20 used by that user can be collected. Collect and manage information. 3- (3). Control information setting request For example, a request for setting control information such as changing an attribute set for each terminal device is sent to the remote maintenance terminal device (TE
0) from 30 to the terminal device 20 in the control sequence shown in FIG.
The control at 114 is performed.

However, the remote maintenance terminal (TE0) 30
In the case of transmission of control information from the terminal device 20 to the terminal device 20, a call setting message (SETUP) M102, M104 is a terminal device for which control information setting is requested in an area of the “sub-address and instruction data” (for example, Terminal device (T
E1) The sub address of 22) and the data of the control information requesting the setting are inserted.

The terminal device 20 transmits a call setup message (SETUP) M1 from the digital data exchange network 10.
Based on the reception of the information 04, the control information regarding the change of the attribute and the like in the own terminal device 20 is set.

That is, a request for setting control information from the remote maintenance terminal device (TE0) 30 to the terminal device 20 is made by using the area of the "call destination saddle information element" of the call setting messages (SETUP) M102 and M104. Becomes

Then, M110 to M11 in FIG.
4 is transmitted by the digital data exchange network 10
And the remote maintenance terminal (TEO) 30, the terminal 20 returns to the initial state.

As described above, the remote maintenance terminal (TEO)
30 can request the setting of the control information for each terminal device 20 of the arbitrarily designated destination, and in response to this, the terminal device 20 is requested to perform the above setting regarding the change of the attribute or the like. Control information can be set.

The description of the embodiment of the present invention has been completed.

In the digital data exchange system of the embodiment described above, two network terminators (NT) 16 and 18 are connected to the digital data exchange network 10 via the subscriber lines 12 and 14. The two terminal devices (TE1, TE1)
2) Although the configuration is such that 22 and 24 are connected, it is not limited to such a configuration to which the present invention can be applied.

That is, for example, the digital data exchange network 10
Are connected to a plurality of network terminating devices.
The present invention can be applied to various digital data exchange systems such as a private branch exchange network in which a large number of terminal devices 20 are connected.

[0083]

As is apparent from the above description, according to the present invention, in the destination subaddress information element of the call setup message, the maintenance control information for the destination communication terminal of the call setup message is inserted. A communication terminal device for communicating via a digital switching network with a remote maintenance terminal device for transmitting the call control message, wherein a call setup message in which said maintenance control information is inserted in a destination subaddress information element from said remote maintenance terminal device. And a diagnostic means for diagnosing the own communication terminal device, and diagnostic result information by the diagnostic means,
Means for inserting the call setting message into the originating sub-address information element and transmitting the call setting message to the remote maintenance terminal device, so that it is set in a plurality of terminal devices used by each user. A terminal device having a remote maintenance terminal control function remotely performs maintenance control on other terminal devices used by the user and collects maintenance result information on the other terminal devices.

Therefore, the maintenance control of the terminal device used by each user can be performed by each user, and all the terminal devices used by each user can be controlled by each user. Can be managed centrally.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram schematically showing a digital data exchange system having a terminal remote maintenance control function according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram showing a specific example of a digital data exchange system having a terminal remote maintenance control function according to an embodiment of the present invention.

3 (a) is a call setup message (SETUP) by layer 3 transmitted from the remote maintenance terminal device of FIG. 2;
FIG. 3 is a diagram showing a format configuration of the first embodiment. FIG. 2B is a diagram showing the format of a layer 3 call setup message (SETUP) sent from the terminal device 20 shown in FIG.

FIG. 4 is a control sequence diagram when the remote maintenance terminal device collects a failure diagnosis test result of each terminal device when a failure occurs in each terminal device.

FIG. 5 is a control sequence diagram in a case where a remote maintenance terminal device collects a result of a failure diagnosis test periodically performed in the terminal device. Reference Signs List 10 digital data exchange network 20, 22, 24 terminal equipment (TE1, TE2) 30 remote maintenance terminal equipment (TEO) SETUP call setup message

Claims (1)

(57) [Claims] The present invention is characterized in that, in a destination subaddress information element of a call setup message, maintenance control information for a destination communication terminal of the call setup message is inserted and transmitted via a digital switching network to a remote maintenance terminal sending the same. Diagnosing means for receiving a call setting message in which the maintenance control information is inserted in a destination sub-address information element from the remote maintenance terminal, and diagnosing the communication terminal. Means for inserting the diagnostic result information by the diagnostic means into the calling subaddress information element of the call setting message, and transmitting the information to the remote maintenance terminal device.