JP3629112B2 - ISDN communication system and terminal device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an ISDN communication system and a terminal device used for automatic meter reading systems such as gas, water and electricity.
[0002]
[Prior art]
Now, in automatic gas meter reading using an ISDN line, it is possible to perform communication using a user / user information notification service in order to implement an ISDN communication system which does not intersect with communication performed by a consumer and is low in cost. is there. FIG. 5 is a diagram showing a communication sequence of a communication system using such a user / user information notification service. In the communication system using the user / user information notification service, a meter reading request message is transmitted from the center 103 to the line IF (interface) 105 (step 501). The line IF 105 sets an activation request in the UUI (user / user information) 35 of the SETUP message 21 (FIG. 2), and this message is transmitted to the I-NCU 111 via the ISDN public line 107 (step 502). The I-NCU 111 transmits a startup message to the gas meter 113 (step 503).
[0003]
When the startup message is transmitted, the gas meter 113 transmits the meter reading value as a response message to the I-NCU 111 (step 504). The I-NCU 111 sets a response message (meter reading value) in the UUI (user / user information) 55 of the DISC message 41 (FIG. 3), and then sends the DISC message 41 to the line IF 105 via the ISDN public line 107 ( Step 505). The line IF 105 transmits a response message (meter reading value) to the center 103 (step 506). In this way, the center 3 can receive the meter reading value.
[0004]
When the center 103 requests further alarm information, a data request is set in the UUI (user / user information) 35 of the SETUP message 21 and communication is performed in the same sequence as in the case of the meter reading value (step 507). To step 512). Even when the center 103 requests a setting message, the data request is set in the UUI (user / user information) 35 of the SETUP message 21 and communication is performed in the same sequence as in the case of the meter reading value (from step 513). Step 518)
.
[0005]
When the data transmission is completed, the center 103 transmits an end request message to the line IF 105 (step 519). A message in which a termination request is set in the UUI (user / user information) 35 of the SETUP message 21 is transmitted from the line IF 105 to the I-NCU 111 via the ISDN public line 107 (step 520). The I-NCU 111 transmits an end message to the gas meter 113 (step 521). The gas meter 13 is unresponsive. When the center 103 only needs to receive the meter reading value, the processing after step 419 is performed after step 506.
[0006]
[Problems to be solved by the invention]
However, when communication is performed by the ISDN communication system using the user / user information notification service in this way, a message from a consumer (message added to the DISC) is charged uniformly to the consumer. For this reason, even during non-normal communication such as an earthquake, customers are automatically charged, which is problematic from the standpoint of maintenance services.
[0007]
The present invention has been made in view of such a problem, and an object of the present invention is to provide an ISDN communication system and a terminal device that are not charged to consumers during non-normal communication. .
[0008]
[Means for Solving the Problems]
In order to achieve the above-described object, according to a first aspect of the present invention, there is provided an ISDN communication system in which communication is performed between a center apparatus and a terminal apparatus via an ISDN public line. When the caller phone number received from the center device is different from the caller phone number stored in advance, the terminal device recognizes that the call is not normal and sends a call disconnect message. Then, the ISDN communication system is characterized in that the line is disconnected and a message is inserted into the caller subaddress of the call setup message and transmitted.
[0009]
In the first invention, in the ISDN communication system in which the center and the meter are connected by an ISDN public line, the center device transmits a caller telephone number which is different from the normal time in an abnormal state, and the terminal device is the center device. If the caller phone number received from the caller is different from the caller phone number stored in advance, the caller recognizes that the caller phone number is abnormal, disconnects the line by sending a call disconnect message, and sets it as the caller subaddress of the call setup message. Insert and send a message.
[0010]
According to a second aspect of the present invention, in the ISDN communication system in which communication is performed between the center device and the terminal device via the ISDN public line, the center device transmits a caller telephone number that is different from the normal number in a non-normal time. The terminal device recognizes that the caller phone number received from the center device is different from the callee phone number stored in advance, and recognizes that the call is not normal, and disconnects the line by sending a call disconnect message. In addition, the ISDN communication system is characterized in that a telegram is inserted and transmitted to the caller subaddress of the call setup message.
[0011]
In the second invention, in the ISDN communication system in which the center and the meter are connected by an ISDN public line, the center device transmits a caller's telephone number that is different from the normal time in an abnormal state, and the terminal device is the center device. If the caller telephone number received from is different from the callee telephone number stored in advance, the caller recognizes that the call is not normal, disconnects the line by sending a call disconnect message, and sets it as the caller subaddress of the call setup message. Insert and send a message.
[0012]
The third invention is a terminal device that communicates with a center apparatus via an ISDN public line, and the caller telephone number received from the center apparatus is different from a caller telephone number stored in advance. Means for recognizing non-normal time and transmitting a call disconnect message to disconnect the line; and when recognizing non-normal time, means for inserting and sending a message to the caller subaddress of the call setting message;
It is a terminal device characterized by comprising.
[0013]
In the third invention, when the caller telephone number received from the center apparatus is different from the caller telephone number stored in advance, the terminal apparatus recognizes that the caller telephone number is abnormal and sends a call disconnect message to disconnect the line. When it is recognized that the time is abnormal, a message is inserted into the caller subaddress of the call setup message and transmitted.
[0014]
The fourth invention is a terminal device that communicates with a center apparatus via an ISDN public line, and the recipient telephone number received from the center apparatus is different from the previously stored recipient telephone number. A means for recognizing abnormal time and transmitting a call disconnect message to disconnect the line; and when recognized as abnormal time, means for inserting and sending a message in the caller subaddress of the call setting message, It is a terminal device characterized by comprising.
[0015]
In the fourth invention, the terminal device recognizes that the caller telephone number received from the center device is different from the callee telephone number stored in advance and recognizes that it is abnormal, and disconnects the line by transmitting a call disconnect message. When it is recognized that the time is abnormal, a message is inserted into the caller subaddress of the call setup message and transmitted.
[0026]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic configuration diagram of an ISDN communication system (hereinafter referred to as a communication system) 1 according to an embodiment of the present invention. The communication system 1 includes a center 3, a line IF 5, an ISDN public line 7, and an I-NCU 11. And a gas meter 13 and the like. 9 indicates a consumer. The ISDN public line 7 is connected between the line IF 5 and the I-NCU 11. The ISDN public line 7 is a line having two B channels and one D channel. The line IF 5 and the I-NCU 11 perform communication control on the digital line. The I-NCU 11 stores the caller subaddress of the center 3 in advance. The gas meter 13 is a gas meter. The present invention can be applied not only to gas meters but also to meters such as electricity and water.
[0027]
FIG. 2 is a format diagram of the SETUP message 21 communicated between the line IF 5 and the I-NCU 11. Header information is set in the header 23. In SETUP 25, SETUP (call setting) is set. The caller telephone number 27 is set with the caller telephone number, the caller subaddress 29 is set with the caller subaddress, the caller telephone number 31 is set with the caller telephone number, and the caller subaddress 33 is set. Is set with the recipient subaddress.
[0028]
FIG. 3 is a format diagram of the DISC message 41 communicated between the line IF 5 and the I-NCU 11. Header information is set in the header 43. DISC (disconnection) is set in the DISC 45.
[0029]
In the present embodiment, when the center 3 transmits a meter-reading request message or the like to the line IF 5 in a non-normal time, the line IF 5 sets a non-normal caller sub-address as the caller sub-address, and a SETUP message or DISC message. A startup message or the like is set in the UUI (user / user information) and transmitted to the I-NCU 11. When the sender subaddress of the SETUP message is different from the sender subaddress stored in advance, the I-NCU 11 recognizes that it is an abnormal time, transmits a DISC message to the line IF5, and is set in the UUI. Information (startup message, etc.) is sent to the gas meter 13. When the gas meter 13 receives a meter reading request message or the like, the gas meter 13 transmits a gas meter reading value or the like as a response message to the I-NCU 11. When the I-NCU 11 recognizes the abnormal time, it inserts a response message or the like into the sender subaddress of the SETUP message and sends it to the line IF 5. The line IF 5 transmits a response message to the center 3.
[0030]
The special communication sequence in the non-normal time according to the present embodiment will be described in more detail with reference to FIG. First, a meter reading request message is transmitted from the center 3 to the line IF 5 (step 401). Since the line IF 5 is abnormal, a sender subaddress different from the sender subaddress previously stored in the I-NCU 11 is set in the sender subaddress 29 of the SETUP message 21, and a UUI (user / user information) 35 is set. A startup request is set in the server and a SETUP message 21 is transmitted to the I-NCU 11 via the ISDN public line 7 (step 402). The I-NCU 11 transmits a startup message to the gas meter 13 (step 403). Further, the I-NCU 11 receives a caller subaddress that is different from the caller subaddress stored in advance, and recognizes that it is abnormal, and sends a DISC message 41 to the line IF5 via the ISDN public line 7, The line is disconnected (step 404).
[0031]
When the startup message is transmitted, the gas meter 13 transmits the meter reading value as a response message to the I-NCU 11 (step 405). The I-NCU 11 sets a response message (meter reading value) in the sender subaddress 29 of the SETUP message 21, and then sends the SETUP message 21 to the line IF 5 via the ISDN public line 7 (step 406). The line IF 5 transmits a response message (meter reading value) to the center 3 (step 407). In this way, the center 3 can receive the meter reading value in a non-normal time.
[0032]
When the center 3 requests further data, a data request message is transmitted to the line IF 5 (step 408). The line IF 5 sets a data request in a UUI (user / user information) 55 of the DISC message 41, and transmits the DISC message 41 to the I-NCU 11 via the ISDN public line 7 (step 409). The I-NCU 11 transmits a data request message to the gas meter 13 (step 410).
[0033]
When the data request message is transmitted, the gas meter 13 transmits a response message including the requested data to the I-NCU 11 (step 411). The I-NCU 11 sets a response message in the sender subaddress 29 of the SETUP message 21 and sends the SETUP message 21 to the line IF 5 via the ISDN public line 7 (step 412). The line IF 5 transmits a response message to the center 3 (step 413).
[0034]
When the data transmission is completed, the center 3 transmits an end request message to the line IF 5 (step 414). A message in which a termination request is set in the UUI (user / user information) 55 of the DISC message 41 is transmitted from the line IF 5 to the I-NCU 11 via the ISDN public line 7 (step 415). The I-NCU 11 transmits an end message to the gas meter 13 and ends the communication (step 416). When the center 3 only needs to receive the meter reading value, the processing after step 414 is performed after step 407.
[0035]
As described above, according to the present embodiment, since a response message is inserted into the sender subaddress 29 of the SETUP message 21 transmitted from the I-NCU 11 to the line IF 5 in a non-normal time, communication that is not charged to the customer Can be performed. This is because even if a message is inserted into the caller subaddress 29, there is no charge.
[0036]
In the present embodiment, the I-NCU 11 stores the caller subaddress in advance, and in a non-normal state, the caller subaddress 29 of the SETUP message 21 to be transmitted to the I-NCU11 from the line IF 5 is stored in advance in the I-NCU11. The caller telephone number may be stored, and the SETUP message 21 or the DISC message 41 may be transmitted from the line IF of the center 3 to the I-NCU 11 to the I-NCU 11 at a non-normal time. In this case, it is necessary to change the line on the center 3 side or have the center 3 make a dial-in contract and have two telephone numbers.
[0037]
In addition, the recipient subaddress is stored in advance in the I-NCU 11, and in a non-normal state, the recipient stored in the I-NCU 11 is stored in the recipient subaddress 33 of the SETUP message 21 transmitted from the line IF 5 to the I-NCU 11. A sender subaddress different from the subaddress may be set.
[0038]
Further, in the case of a customer having a plurality of telephone numbers on a single line (a customer with a dial-in contract), the telephone number of the called party is stored in advance in the I-NCU 11, and the line IF 5 A caller subaddress different from the callee subaddress stored in advance in the I-NCU 11 may be set in the callee telephone number 31 of the SETUP message 21 to be transmitted to the I-NCU11.
[0039]
【The invention's effect】
As described above in detail, according to the present invention, it is possible to provide an ISDN communication system, a center device, and a terminal device that are not charged by a customer during non-normal communication.
[Brief description of the drawings]
1 is a schematic configuration diagram of a communication system 1 according to an embodiment of the present invention. FIG. 2 is a format diagram of a SETUP message 21. FIG. 3 is a format diagram of a DISC message 41. FIG. 4 is a non-normal ISDN communication system. FIG. 5 is a diagram showing a communication sequence of a conventional ISDN communication system.
DESCRIPTION OF SYMBOLS 1 ... Communication system 3 ... Center 5 ... Line IF
7 ... ISDN public line 9 ... customer 11 ... I-NCU
13 ... Gas meter 21 ... SETUP message 23, 43 ... Header 25 ... SETUP
27 ... Caller telephone number 29 ... Caller subaddress 31 ... Callee telephone number 33 ... Callee subaddress 35, 55 ... UUI
45 ... DISC

Claims (4)

In an ISDN communication system that performs communication between a center device and a terminal device via an ISDN public line,
The center device transmits a caller telephone number which is different from the normal time in a non-normal time,
The terminal device, when the caller telephone number received from the center device is different from the caller phone number stored in advance, recognizes that it is abnormal, disconnect the line by sending a call disconnect message, and An ISDN communication system , wherein a teletext is inserted into a sender subaddress of a call setup message and transmitted . In an ISDN communication system that performs communication between a center device and a terminal device via an ISDN public line,
The center device transmits in a non-normal time by a caller telephone number different from the normal one,
The terminal device recognizes that the caller telephone number received from the center device is different from the callee telephone number stored in advance, and recognizes that it is abnormal, disconnects the line by sending a call disconnect message, and An ISDN communication system , wherein a teletext is inserted into a sender subaddress of a call setup message and transmitted . A terminal device that communicates with a center device via an ISDN public line,
If the caller telephone number received from the center device is different from the caller telephone number stored in advance, means for recognizing that it is abnormal, and sending a call disconnect message to disconnect the line;
When it is recognized as non-normal time, means for inserting and sending a message to the caller subaddress of the call setup message,
A terminal device comprising: A terminal device that communicates with a center device via an ISDN public line,
A means for recognizing that the caller telephone number received from the center apparatus is different from the callee telephone number stored in advance, and for disconnecting the line by transmitting a call disconnect message;
When it is recognized as non-normal time, means for inserting and sending a message to the caller subaddress of the call setup message,
A terminal device comprising:

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