JPH1084428A - Line terminal equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain communication with a data terminal equipment via the line terminal equipment by controlling a network control section, when a call signal detection section detects a call signal after the end of communication, in the case of terminal equipment call communication through the start of the data terminal equipment for allowing a reception section to receive a signal from a central monitor, thereby making transmission from the central monitor while connecting to a line to a consumer's house. SOLUTION: When terminal call communication is finished by receiving a start text from data terminal equipments 2, 3, the system goes into a call signal monitor state. When a call signal detection section 16 detects a call signal for telephone contact from a central monitor 5 to a consumer's house, a reception section 9 controls a network control section 8 for allowing the reception section 9 to receive a signal from the central monitor 5. Thus, the communication between the central monitor 5 to the data terminal equipments 2, 3 is attained via a line terminal equipment 19, while keeping the line for telephone contact from the central monitor 5 to the consumer's house connected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention collects data from a data terminal device such as a gas shut-off device by communication and transmits data to a central monitoring device or a home controller by a no-ringing communication service using a public line network or a terminal calling system. The present invention relates to a line terminal device for performing transfer.

[0002]

2. Description of the Related Art As shown in FIG. 3, a conventional line terminal device 1 is a device for connecting a first data terminal device 2 and a second data terminal device 3 to a public line 4.

Here, the first data terminal device 2 is an automatic gas shut-off device with a communication function built in a microcomputer, which is connected to a gas meter, measures a gas flow rate, and shuts off gas supply when an abnormality is detected. Reason, interruption 5
This is a device for performing data communication with the central monitoring device 5 via the line terminal device 1 for a minute notice or the like.

The second data terminal 3 is a data terminal similar to the first data terminal 2. When the use of gas continues for a long time and becomes 5 minutes before the scheduled cutoff, the first and second data terminal devices 2 and 3 transmit communication by transmitting an activation message having destination telephone number information first. Start,
Finally, the communication protocol terminates the communication operation by receiving the communication end message.

First, when the first data terminal device 2 transmits a start message, the start message is received by the receiving unit 9 via the data terminal selection switch 6 and the terminal interface unit 7. When the message analysis unit 10 recognizes the message received by the reception unit 9 as the destination telephone number, the line terminal device 1 checks the matching of the electrical conditions with the public line 4 by the network control unit 8 so as to connect to the central monitoring device 5. The central monitoring device 5 is called by dialing based on the information of the activation message received from the first data terminal device 2.

[0006] When called, the central monitoring device 5 connects the line and transmits an incoming response signal to the line terminal device 1. The signal is received by the receiving unit 9. The message analysis unit 10 analyzes the signal received by the reception unit 9, and if it determines that the signal is an incoming response signal from the central monitoring device 5, the through switching control unit 13 sets the changeover switch 14 from the A side to the B side to request the information request. The transmission message is formed by the transmission message forming unit 11 and the transmission unit 12 switches the switch 1
4. Send a message to the first data terminal device 2 via the terminal interface unit 7 and the data terminal selection switch 6. First
When the data terminal device 2 receives the information request message, it transmits a response message with 5-minute pre-shutdown notice information.

[0007] The line terminal device 1 receives the message sent from the first data terminal device 2 and transmits the message to the data terminal selection switch 6, the terminal interface unit 7, the changeover switch 14, and the network control unit 8.
Through transfer to the central monitoring device 5 via the. When the message is received by the central monitoring device 5, the central monitoring device 5 transmits a communication end message to end the communication. In the line terminal device 1, the communication end message is transferred through to the first data terminal device 2 to end the communication with the central monitoring device 5. At this time, the line terminal device 1 disconnects the communication path with the public line 4 by the network control unit 8 and returns the switch 14 from the B side to the A side by the through switch control unit 13.

On the other hand, in the central monitoring device 5 which performs processing according to the information raised by calling the terminal, the information of the notice of shutting down five minutes before has risen. Confirm that there is no abnormal use or forget to turn off, and call attention to the use of gas appliances by consumers. Generally, the telephone call 15 connected to the line terminal device 1 is used for this call.

[0009] Then, when the supervisor determines that there is no problem in using gas by telephone response to the customer's house, the supervisor temporarily disconnects the call to the customer's house. Then, in order to avoid the interruption of the first data terminal device 2, the central monitoring device 5 performs the noling communication to the line terminal device 1 to execute the communication for clearing the interruption monitoring timer of the first data terminal device 2. Subsequently, the line terminal device 1 called by the no ringing incoming call is sent to the network control unit 8.
Thus, electrical conditions with the public line 4 are matched to enable communication with the central monitoring device 5.

Next, a message is transmitted from the central monitoring device 5,
The message is received by the receiving unit 9. The message received by the receiving unit 9 is analyzed by the message analyzing unit 10. When the received message is analyzed as a start request to the first data terminal device 2, the through switching control unit 13 switches the switching switch 14.
Is switched from the A side to the B side, a message for the first data terminal device 2 is transmitted from the transmission unit 12, converted into a signal by the terminal interface unit 7, and output via the data terminal selection switch 6.

In response to this, a response message is transmitted from the first data terminal device 2, and the message is transferred via the data terminal selection switch 6, the terminal interface unit 7, the changeover switch 14, the network control unit 8, and the public line 4. Then, the central monitoring device 5 and the first data terminal device 2 can communicate with each other. Next, the central monitoring device 5 avoids the interruption by transmitting a clear message of the interruption monitoring timer in order to avoid the interruption of the first data terminal device 2.

FIG. 4 shows a procedure for avoiding the interruption of the first data terminal device 2 in the conventional example (a message is sent in the direction of the arrow).

The first data terminal device 2 transmits to the line terminal device 1 an activation message (1) to which the destination information is added five minutes before the interruption. Then, the line terminal device 1 dials based on the destination information and calls the central monitoring device 5. The called central monitoring device 5 sends an answer tone (terminating response signal) (2) to the line terminal device 1 to request calling information. Line terminal 1 is answer tone (2)
After receiving this, an alarm information request message (3) is transmitted to the first data terminal device 2.

When the return data message (4) is transmitted from the first data terminal device 2, the line terminal device 1 transmits the message to the central monitoring device 5 to notify the central monitoring device 5 of the interruption five minutes before the interruption. Then, the central monitoring device 5 transmits a communication end message (5) to end the communication.

In the line terminal device 1, this communication end message (5) is transferred through to the first data terminal device 2 to terminate the communication with the central monitoring device 5. On the central monitoring device 5 side, a supervisor dials the customer's house based on this information, calls the customer, and confirms the situation by telephone. After the end of the call, the monitor calls the line terminal device 1 again from the central monitoring device 5 with no-ringing incoming call to connect the line.

Next, the central monitoring device 5 selects the first data terminal device 2 by message (6) and starts communication, and thereafter, the central monitoring device 5 and the selected first data terminal device 2 transmit messages (7). (8) (9) (10) is transferred, and a clear message (9) of the monitoring timer for avoiding the interruption arrives at the first data terminal device 2, and a process reception response message ( 10) is returned. Further, the central monitoring device 5 transmits a communication end message (11) to the line terminal device 1 and the first data terminal device 2 to end the communication with the first data terminal device 2.

[0017]

However, in the above-described configuration, after the supervisor responds to the telephone call with the customer, the call is temporarily terminated, and the first data terminal device is again returned from the central monitoring device 5 by the no ringing communication. I had to start communicating with 2. Therefore, if the connection to the customer's home is delayed or if the telephone response is prolonged, it will not be possible to avoid the cut-off, the communication cost of the no-ringing communication for avoiding the cut-off will be incurred, or if the cut-off is avoided, the customer will be notified. Had to make a phone call to do so.

[0018]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a network control unit and a customer premises for matching electrical conditions to a public line so as to communicatively connect a data terminal device to a central monitoring device. A call signal detecting unit for detecting a signal for calling a telephone set, a receiving unit for converting a signal from a data terminal device or a central monitoring device into a message, a message analyzing unit for analyzing the received message received by the receiving unit, and data In the case of terminal call communication initiated by a terminal device, a busy network control that controls the network control unit when the call signal detection unit detects a call signal after the communication is completed and the signal from the central monitoring unit is received by the reception unit. It has a part.

According to the above-mentioned invention, if a line from the central monitoring device to the customer's house is connected and a message is transmitted from the central monitoring device, communication with the data terminal device can be performed via the line terminal device.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A line terminal device according to the present invention comprises a network control unit for matching electric conditions with a public line and a telephone at a customer's home in order to connect a data terminal device to a central monitoring device. A call signal detection unit that detects a call signal, a reception unit that converts a signal from a data terminal device or a central monitoring device into a message, a message analysis unit that analyzes a received message received by the reception unit, In the case of the terminal call communication by activation, after the communication is terminated, a busy network control unit controls the network control unit when the call signal monitoring unit detects the call signal and causes the reception unit to receive a signal from the central monitoring device. Things. When the terminal call communication is terminated by receiving the activation message from the data terminal device, the state becomes a monitoring state of the call signal, and when the central monitoring device detects a call signal for making a telephone call to the customer's house, the reception control unit By controlling the network control unit, the signal from the central monitoring device can be received by the receiving unit.If the line from the central monitoring device to the customer's home is connected, the central monitoring device , Communication with the data terminal device can be performed via the line terminal device.

Further, when the off-hook detecting unit for detecting that the telephone at the customer's home is off-hook detects the off-hook, the off-hook control unit controls the network control unit to allow the receiving unit to receive a signal from the central monitoring unit. And

Then, the line terminal device detects a call signal for making a telephone call from the central monitoring device to the customer's house,
Further, since the signal from the central monitoring device is not received by the receiving unit until the off-hook detecting unit detects the off-hook,
When the customer cannot answer the telephone, for example, when the customer is absent, the network control unit and the receiving unit are not operated, so that the power consumption can be reduced during that time.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. (Embodiment 1) FIG. 1 is a block diagram of a line terminal apparatus according to the present invention. Components having the same numbers as those in FIG. 3 are components having the same functions. In FIG. 1, reference numeral 16 denotes a calling signal detecting unit for detecting a signal for calling the telephone 15 at the customer's home, reference numeral 17 denotes an off-hook detecting unit for detecting that the telephone 15 at the consumer's home is off-hook, and reference numeral 18 denotes a busy network control unit. In the case of terminal call communication by activation from the first and second data terminal devices 2 and 3, when the call signal detection unit 16 detects a call signal after the communication is completed, the network control unit 8 is controlled to control the central monitoring device 5 Is received by the receiving unit 9.
19 is a line terminal device of the present invention.

Next, the operation will be described. First, when the first data terminal device 2 uses gas continuously for a long time and becomes 5 minutes before the scheduled cutoff, the first data terminal device 2 first transmits a startup message having destination telephone number information to the line terminal. Transmit to the device 19. Line terminal device 1
At 9, the activation message is received by the reception unit 9 via the data terminal selection switch 6 and the terminal interface unit 7. When the message analysis unit 10 recognizes the message received by the reception unit 9 as a destination telephone number, the line terminal device 19 checks the matching of the electrical conditions with the public line 4 by the network control unit 8 so as to connect to the central monitoring device 5. The central monitoring device 5 performs dialing based on the information of the activation message received from the first data terminal device 2.
Call.

When called, the central monitoring device 5 connects the line and transmits an incoming response signal to the line terminal device 19. The signal is received by the receiving unit 9. The message analysis unit 10 analyzes the signal received by the reception unit 9, and if it determines that the signal is an incoming response signal from the central monitoring device 5, the through switching control unit 13 sets the changeover switch 14 from the A side to the B side to request the information request. A message is formed by the transmission message composition unit 11 and transmitted from the transmission unit 12 via the terminal interface unit 7 and the data terminal selection switch 6 to the first message.
A message is sent to the data terminal device 2.

When the first data terminal device 2 receives the information request message, it transmits a response message with 5 minutes before-shutdown notice information.
The line terminal device 19 transfers through the message sent from the first data terminal device 2 to the central monitoring device 5 via the data terminal selection switch 6, the terminal interface unit 7, the changeover switch 14, and the network control unit 8. When the message is received by the central monitoring device 5, the central monitoring device 5 transmits a communication end message to end the communication.

In the line terminal device 19, the communication end message is transferred to the first data terminal device 2 through the central monitoring device 5.
Ends communication with. At this time, the line terminal device 19 disconnects the communication path with the public line 4 by the network control unit 8 and switches the changeover switch 14 from the B side to the A
Return to the side. Furthermore, since the terminal call communication is initiated by the data terminal device 2 or 3, the call signal detection unit 16 waits for a signal for calling the telephone 15 at the customer home after the communication is completed.

On the other hand, in the central monitoring device 5 which performs processing according to the information received by calling the terminal, the information of the notice of shutting down five minutes before has come up. Make sure that there is no abnormal use of the gas or forget to turn it off, and call attention to the use of gas appliances by consumers. For this call, the telephone 15 of the line to which the line terminal device 19 is connected is used. At this time, since the call signal detecting unit 16 detects a call signal when calling a consumer by telephone, the busy network control unit 18 controls the network control unit 8 to send a signal on the public line 4 to the receiving unit 9. Tell

When the supervisor determines that there is no problem in using gas by telephone call with the customer's house, the supervisor temporarily suspends the call to the customer's house and avoids shutting down the first data terminal device 2 while the line is connected. In order to execute the communication, the central monitoring device 5 starts transmitting a message to the line terminal device 19 in order to execute communication for clearing the interruption monitoring timer of the first data terminal device 2. The line terminal device 19 is controlled by the busy network control unit 18 to control the network control unit 8 so that the reception unit 9 can receive the message. The line terminal device 19 receives the message transmitted from the central monitoring device 5 and receives the message. Analyze with.

When the received message is analyzed as an activation request to the first data terminal device 2, the through switching control unit 13 switches the contact of the switching switch 14 from the A side to the B side, and A message for the device 2 is formed by the transmission message composition unit 11, and the transmission unit 12, the changeover switch 14,
Terminal interface unit 7, data terminal selection switch 6
Is output to the first data terminal device 2 via the.

In response to this, a response message is transmitted from the first data terminal device 2, and the message is transferred via the data terminal selection switch 6, the terminal interface unit 7, the changeover switch 14, the network control unit 8, and the public line 4. Thus, the central monitoring device 5 and the first data terminal device 2 can communicate with each other.

Next, the central monitoring device 5 avoids the interruption by transmitting a clear message of the interruption monitoring timer in order to avoid the interruption of the first data terminal device 2.

FIG. 2 shows a communication sequence of the line terminal device 19 in the embodiment of the present invention. The operation of the line terminal device will be described with reference to the flow of the message with reference to FIG. 2. First, the first data terminal device 2 transmits to the line terminal device 19 a start-up message (1) with the destination information added 5 minutes before the shutdown. . Then, the line terminal device 19 dials based on the destination information and calls the central monitoring device 5.

When called, the central monitoring device 5 sends an answer tone (terminating response signal) (2) to the line terminal device 19 to request calling information. After receiving the answer tone (2), the line terminal device 19 transmits an alarm information request message (3) to the first data terminal device 2.

When the first data terminal device 2 transmits the return alarm information response message (4), the line terminal device 1
9 informs the user five minutes before the interruption by transferring the message to the central monitoring device 5 through. Then, the central monitoring device 5 transmits a communication end message (5) to end the communication. In the line terminal device 19, the communication end message (5) is through-transferred to the first data terminal device 2 to end the communication with the central monitoring device 5. On the central monitoring device side, a supervisor dials the customer's house based on this information, calls the customer, and checks the situation by telephone.

After answering the telephone call, the supervisor transmits a message from the central monitoring device 5 to the line terminal device 19 while the line is connected, selects the first data terminal device 2 by message (6), and starts communication. Thereafter, the telegrams (7), (8), (9), and (10) are transferred between the central monitoring device 5 and the selected first data terminal device 2, and a monitoring timer for preventing the first data terminal device 2 from shutting down is transmitted. A clear message (9) arrives, and a processing acceptance response message (10) is returned from the first data terminal device 2. Subsequently, the central monitoring device 5 transmits a communication end message (11) to the line terminal device 19 and the first data terminal device 2 to end the communication with the first data terminal device 2.

According to this configuration, when the terminal call communication is terminated by receiving the activation message from the data terminal devices 2 and 3, the state becomes the monitoring state of the call signal, and the central monitoring device 5
When the call signal detection unit 16 detects a call signal for making a telephone call to the customer's home from the side, the reception control unit 9 controls the network control unit 8 so that the reception unit 9 can receive the signal from the central monitoring device 5. Therefore, the communication from the central monitoring device 5 to the data terminal devices 2 and 3 via the line terminal device 19 becomes possible while the line connected by telephone from the central monitoring device 5 to the customer's house is connected.

(Embodiment 2) Next, Embodiment 2 of the present invention will be described with reference to FIG.
This will be described with reference to FIG. In FIG. 1, the difference from the first embodiment is that when an off-hook detecting unit 17 that detects that the telephone 15 at the customer's home is off-hook detects an off-hook, the network control unit 8 is controlled to This is to include a busy network control unit 18 that allows the receiving unit 9 to receive a signal.

Next, the operation will be described. First, when the use of gas continues for a long time and becomes five minutes before the scheduled cutoff, the first data terminal device 2 first transmits a start message having destination telephone number information to the line terminal device 19. In the line terminal device 19, the activation message is received by the receiving unit 9. When the message analysis unit 10 recognizes the received message as the destination telephone number, the line terminal unit 19 matches the electrical conditions with the public line 4 by the network control unit 8 and dials in order to connect to the central monitoring unit 5. Accordingly, the central monitoring device 5 is called. The called central monitoring device 5 transmits an incoming response signal to the line terminal device 19. If the line terminal device 19 determines that it is an incoming response signal from the central monitoring device 5, it sends an information request message to the first data terminal device 2. Upon receiving the information request message, the first data terminal device 2 transmits a response message with 5-minute-before-shutdown notice information. The line terminal device 19 performs a through transfer to the central monitoring device 5 sent from the first data terminal device 2. When the message is received by the central monitoring device 5, the central monitoring device 5 transmits a communication end message to end the communication.

The line terminal device 19 transfers this communication end message to the first data terminal device 2 through the central monitoring device 5.
Ends communication with. At this time, in the case of the terminal call communication initiated by the data terminal device 2 or 3, the line terminal device 19 terminates the communication, and then the call signal detecting unit 16 waits for a signal for calling the telephone 15 at the customer home, and The off-hook detection unit 17 enters a state of waiting for the off-hook of the telephone 15 at the customer's house.

On the other hand, in the central monitoring device 5 which performs processing according to the information raised by calling the terminal, the information of the notice of shutting down five minutes before has come up, so that the monitor calls the corresponding customer's home and calls the gas appliance. Make sure that there is no abnormal use of the gas or forget to turn it off, and call attention to the use of gas appliances by consumers.

For this call, the telephone 15 of the line to which the line terminal device 19 is connected is normally used. At this time, the call signal detection unit 16 detects a call signal when calling a customer by a telephone from a supervisor on the central monitoring device 5 side, but the busy network control unit 18 still controls the network control unit 8 at this time. Do not control.

The telephone 15 for the customer to answer the call
When the off-hook detection unit 17 detects off-hook, the busy network control unit 18 controls the network control unit 8 for the first time to transmit a signal on the public line 4 to the reception unit 9. When the supervisor determines that there is no problem in using gas by telephone call with the customer's house, the supervisor temporarily suspends the call to the customer's house as it is and avoids blocking the first data terminal device 2 while the line is connected. The central monitoring device 5 starts transmitting a message to the line terminal device 19 in order to execute communication for clearing the interruption monitoring timer of the first data terminal device 2.

According to this configuration, since the central monitoring device 5 detects a call signal for making a telephone call to the customer's home and does not set the reception state until the off-hook detection unit 17 detects the off-hook, the customer is absent. When the user cannot answer the call, the network control unit 8 and the receiving unit 9 are not operated, so that the power consumption can be reduced during that time.

Therefore, since the power supply of the line terminal device 19 generally uses a battery so that it can operate even during a power failure, the reduction in power consumption leads to a reduction in the consumption of the battery, and the power supply cost can be reduced or reduced. The operating life can be extended.

[0046]

As described above, according to the line terminal device of the present invention, the following effects can be obtained.

According to the first aspect, the line terminal device of the present invention waits for a call signal when the terminal call communication is terminated by receiving the activation message from the data terminal device,
When a call signal for making a telephone call to the customer's home is detected from the central monitoring device, the reception control unit controls the network control unit so that the receiving unit can receive the signal from the central monitoring device. Therefore, since the central monitoring device can communicate with the data terminal device via the line terminal device while the line connected by telephone from the central monitoring device to the customer's home is connected, the supervisor once answers the telephone with the customer and once talks. And it is not necessary to restart the communication with the first data terminal device by the no-ringing communication from the central monitoring device again. Further, even if the connection to the customer's house is delayed or the telephone response is prolonged, it is possible to reduce the number of cases in which the line is still connected and the communication can be shifted to the immediate communication so that the communication for avoiding the interruption cannot be made in time. In addition, no separate ringing communication cost for avoiding interruption is not required. In addition, since the call with the customer can be communicated to avoid the interruption while being held, the central monitoring device can continue to notify the customer that the interruption has been avoided by telephone, and it is necessary to call the customer again. Because it is gone, the call charge becomes cheaper.

According to the second aspect, the central monitoring device detects a call signal for making a telephone call to the customer's house, and the receiving portion receives the signal from the central monitoring device until the off-hook detecting portion detects the off-hook. In order not to let
When the customer is absent or cannot answer the telephone, the network control unit and the receiving unit are not operated, so that the power consumption during that period can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram of a line terminal device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a communication sequence of the device.

FIG. 3 is a block diagram of a conventional line terminal device.

FIG. 4 is a diagram showing a communication sequence of the device.

[Explanation of symbols]

 Reference Signs List 6 Data terminal selection switch 7 Terminal interface unit 8 Network control unit 9 Reception unit 10 Message analysis unit 13 Through switching control unit 14 Changeover switch 16 Call signal detection unit 17 Off-hook detection unit 18 Busy network control unit

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Kazutaka Hamada 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (2)

[Claims] 1. A network control unit for matching electrical conditions to a public line so as to communicatively connect a data terminal device to a central monitoring unit, and a call signal detection unit for detecting a signal for calling a telephone at a customer's house. A receiving unit that converts a signal from the data terminal device or the central monitoring device into a message, a message analyzing unit that analyzes the received message received by the receiving unit, and a terminal call by activation from the data terminal device In the case of communication, a line comprising a busy network control unit which controls the network control unit when the call signal detection unit detects a call signal after the communication is completed and causes the reception unit to receive a signal from the central monitoring device. Terminal device. 2. The line terminal device according to claim 1, wherein the call signal detecting unit is an off-hook detecting unit that detects that the telephone is off-hook.