JP3857375B2 - COMMUNICATION SYSTEM AND RECEPTION DEVICE USED FOR COMMUNICATION SYSTEM - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a communication system using a telephone line, and more particularly to a communication system capable of notifying a receiving apparatus of a subscriber line number of a transmitting apparatus.
[0002]
[Prior art]
Conventionally, various communication systems using telephone lines have been put into practical use, such as an elevator remote monitoring system, a machine security system, and an emergency call system.
[0003]
Here, the conventional technology will be described by taking a machine security system as an example.
[0004]
In the machine security system, a reporting device is installed in a building to be guarded, and is connected to a center device via a telephone line.
[0005]
An intrusion sensor or a fire sensor installed at an appropriate place in the building is connected to the notification device.
[0006]
For example, when a fire sensor detects a fire, a fire signal is notified from the notification device to the center device via a telephone line. When the center apparatus receives the fire signal, it takes appropriate measures such as directing a coping person to the monitoring target.
[0007]
In addition, when a reporting device malfunctions or a telephone line is disconnected, even if the sensor detects a fire or the like, a signal is not transmitted to the center device, and the machine security system does not function.
[0008]
Therefore, even if a sensor or the like has not detected an abnormality, the reporting device periodically reports to the center device via the telephone line, and the reporting device and the telephone line are normal depending on the presence or absence of this periodic notification. Was monitored by the center device.
[0009]
[Problems to be solved by the invention]
Periodic reporting differs from reporting status change information in a monitoring target such as a fire signal, and the content of the reporting itself has no significant meaning.
[0010]
In addition, when the time interval of the regular notification is set to be long, trouble such as disconnection of the telephone line is slow to be transmitted to the center device. On the other hand, if the setting is short, troubles will be transmitted more quickly, but as the number of notifications increases, the telephone line connection fee will increase, and the running cost of the mechanical security system will increase, hindering the spread of the security system. Become. That is, although the contents of the report itself are not important, a telephone line connection fee increases in order to improve security. In addition, when a large number of transmission devices are connected to the reception device, the telephone line connected to the reception device is congested if the time interval of the periodic notification of the transmission device is short. As a result, there is a problem that transmission of important state change information (for example, a fire signal or an intruder detection signal) to the receiving device is delayed.
[0011]
Therefore, an object of the present invention is to provide a communication system in which the communication time of the telephone line is reduced as much as possible and the communication efficiency is improved in the case of a report having no meaning in the report content itself.
[0012]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a transmitter having communication means for releasing a line when a ringback tone is detected from an exchange, an activation signal receiving means for receiving an activation signal from the exchange, and a line closing for closing and releasing a telephone line. A subscriber of the transmitting apparatus includes a generating / opening means, a receiving means for receiving a subscriber line number of the transmitting apparatus from the exchange, and a line control means for closing the line when receiving an activation signal. Provided is a communication system using a telephone line connected to an exchange capable of notifying a line number to the receiving apparatus.
[0013]
Then, when making a report whose transmission content itself is meaningless (for example, a regular report), first, the transmission device dials and sends a selection signal to the exchange. When the exchange receives this selection signal, the exchange sends an activation signal to the selected receiver. When the receiving device receives the activation signal, the receiving device closes the telephone line. When the telephone line is closed, the exchange sends the subscriber line number to which the transmitting apparatus is connected to the receiving apparatus. When the subscriber line number is received, the receiving apparatus opens the telephone line. When the exchange recognizes the opening of the telephone line, it sends a ringback tone to the transmitting device via the telephone line. When the transmitting device detects the ringback tone, it opens the telephone line and terminates communication.
[0014]
Thereby, the receiving apparatus can know that there was a report from the transmitting apparatus before the line between the transmitting apparatus and the receiving apparatus is connected. Therefore, it is possible to shorten the time required to occupy the telephone line for a report having no meaning in the transmission content itself. In addition, since the receiving device can know the transmission operation of the transmitting device without being charged for the usage fee of the telephone line, the running cost of the communication system can be reduced.
[0015]
A second invention is a transmission device used in a communication system using a telephone line for notifying a subscriber line number of a transmission device to a reception device, and includes a communication means for releasing a line when a ringback tone is detected from an exchange. Provided is a transmission apparatus.
[0016]
As a result, the time for occupying the subscriber line between the transmitter and the exchange is shortened.
[0017]
According to a third aspect of the present invention, there is provided a receiving apparatus for use in a communication system using a telephone line for notifying a receiving apparatus of a subscriber line number of a transmitting apparatus, an activation signal receiving means for receiving an activation signal from an exchange, and the exchange Receiving means for receiving the subscriber line number of the transmitting device, line closing / opening means for closing and opening the telephone line, and line control means for closing the line when receiving an activation signal and then opening it And a storage device for storing the subscriber line number of the transmitter and the time when the notification of the subscriber line number is received.
[0018]
As a result, the receiving device can receive the subscriber line number of the telephone line to which the transmitting device that performed the transmission operation from the exchange is connected, and can store the received time, so it is possible to check when the notification of the transmitting device has occurred. It can be done.
[0019]
In the fourth invention, in addition to the first invention or the second invention, the transmission device stores a plurality of transmission destination telephone numbers, and the communication system or transmission can select the transmission destination telephone numbers according to the transmission contents. Providing the device.
[0020]
This makes it possible to perform a transmission operation on a dedicated receiving apparatus only in the case of a report that does not make sense for the transmission content itself, and can prevent the transmission content itself from affecting a meaningful report.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the invention will be described with reference to FIGS.
[0022]
FIG. 1 is a diagram showing a system configuration of a communication system according to the present invention. In the communication system, a transmission device 1 and a reception device 2 are connected by a telephone line 4 having an exchange 3.
[0023]
FIG. 2 shows a block diagram of the transmission apparatus 1. The transmitting apparatus 1 includes a ringback tone detecting means 11 for detecting a ringback tone output from the exchange 3, a line closing / opening means 12 for closing / opening the telephone line 4, and a ringback tone detecting means 11. The line control means 13 for controlling the line closing / opening means 12 by the output of is provided.
[0024]
FIG. 3 is a block diagram of the receiving device 2. The receiving device 2 includes a storage means 21 for storing a subscriber line number of a telephone line to which the registered transmitting device 1 is connected and a time to be described later, and a subscription of the transmitting device 1 sent from the exchange 3. Receiving means 22 for receiving the telephone line number, line closing / opening means 23 for closing or opening the telephone line 4, and activation signal reception for receiving an activation signal connected to the telephone line 4 and sent from the exchange 3. And a line control means 25 for controlling the line closing / opening means 23 by the output from the receiving means 22 or the activation signal receiving means 24.
[0025]
The storage unit 21 includes a memory 211 that stores a subscriber line number to which the transmission apparatus 1 is connected in advance and a time when the subscriber line number was recently received in association with the subscriber line number, and a subscriber line number. Is received from the receiving means 22, and the storage control means 212 is configured to store the current time input by the time measuring means 213 in the memory 211 corresponding to the subscriber line number.
[0026]
Next, the operation of the communication system configured as described above will be described with reference to FIG. First, when the transmission device 1 closes the telephone line 4 for transmission, a dial tone is returned from the exchange 3 to the transmission device 1. Then, the transmitting device 1 sends the telephone number (selection signal) of the receiving device 2 to the exchange 3 (step 1).
[0027]
Next, the exchange 3 sends an activation signal to the receiving device 2. In the receiving apparatus 2, when the activation signal is received by the activation signal receiving unit 24, the line closing / opening unit 23 is operated from the line control unit 25 to close the telephone line 4. Next, the exchange 3 sends out the subscriber line number of the telephone line to which the transmitter 1 is connected via the telephone line 4. The receiving device receives the subscriber line number of the transmitting device 1 transmitted from the exchange 3 by the receiving means 22. When the reception is completed, the signal is output from the receiving means 22 to the line control means 25, and the telephone line 4 is opened by the line closing / opening means 23 from the line control means 25. The storage control unit 212 stores the current time measured by the time measuring unit 213 in association with the subscriber line number stored in the memory 211. (Step 2)
When the exchange 3 recognizes that the line of the receiving device 2 is open, it transmits a ringback tone to the transmitting device 1 and a call signal to the receiving device 2. When the ringback tone is detected by the ringback tone detection means 11, the transmission apparatus 1 controls the line closing / opening means 12 from the line control means 13 to open the telephone line.
[0028]
On the other hand, even if the receiving device 2 receives the call signal, the telephone line is not closed until the call signal is received a predetermined number of times or more. (Step 3)
Accordingly, the receiving device 2 has a line with the transmitting device 1.ContactIt is possible to recognize that there has been a transmission operation from the transmission apparatus 1 before it is continued. As a result, it takes only a very short time to occupy the telephone line 4, so that a communication system with good communication efficiency can be provided. Further, since the normality of the transmission device 1 and the telephone line 4 can be confirmed by the reception device 2 without connecting the transmission device 1 and the reception device 2, no telephone line connection fee is required, and the transmission device 1 is frequently used. In the case of a machine security system or emergency call system that requires confirmation of the status of the system, the reliability of the system can be improved at a low cost.
[0029]
【Example】
Next, a first embodiment in the case where the present invention is applied to a machine security system will be described with reference to FIGS.
[0030]
FIG. 5 is a diagram showing a system configuration of the machine security system.
[0031]
As shown in the figure, in the mechanical security system, a reporting device 5 is installed in each of a plurality of buildings to be guarded, and is connected to a center device 6 via a telephone line 4. The center device 6 is connected to the exchange 3 through two telephone lines 4a and 4b. 4a is a telephone line for receiving an abnormality report from the reporting device 5, and 4b is a telephone line for receiving a periodic report.
[0032]
FIG. 6 shows a block diagram of the notification device 5. The reporting device 5 includes a sensor input unit 51 that receives signals from various sensors such as a fire sensor and an intrusion sensor installed at an appropriate place of a monitoring target (hereinafter referred to as a property) (not shown), a machine security set / release operation, An operation display unit 52 using a liquid crystal touch panel for performing status display, various settings, etc., a timer 53 for measuring the interval of periodic notifications, a communication unit 55 for communicating with the center device 6 via the telephone line 4, and a notification device 5 The storage unit 56 stores a program to be operated and various data, and a control unit 54 controls these.
[0033]
Although not shown, the communication unit 55 is provided with at least a relay for closing / opening a DC loop between the telephone line 4 and the exchange 3 and a means for detecting a ringback tone from the exchange 3. In addition, in the storage unit 56, as shown in FIG. 8, the property code, which is an identification code unique to the property, a telephone number for reporting an abnormality when the sensor detects an abnormality, and the time for periodic reporting The phone number for periodic notifications, etc., which is the phone number of the system, is stored.
[0034]
The notification operation of the notification device 5 configured as described above will be described with reference to the flow of FIG.
[0035]
First, when the reporting device 5 is installed in a property and the power is turned on, the timer 53 starts timing (S101). In this embodiment, the timer 53 expires in 15 minutes. Note that the shorter the time taken by the timer 53, the shorter the time interval for regular notifications and the security is improved. On the other hand, if the time is too short, the occupied time of the telephone line 4 becomes longer due to only regular notifications. An appropriate time is selected.
[0036]
In S102, it is monitored whether there is an input of an abnormal signal from the sensor or an input of a guard set operation from the operation display unit 52. Here, if a fire detection signal is input from the fire sensor, the process proceeds to S109 to perform a notification operation. In S109, the communication line 55 closes the telephone line 4 and the DC loop. Then, the telephone number for abnormality notification stored in the storage unit 56 is dialed. Then, it waits for reception of a response signal from the center device 6 (S111). Although not described in the flow of FIG. 6, if the response signal cannot be received even after a predetermined time has elapsed, or if the telephone line 4 is busy, the DC loop is once opened and the transmission operation from S109 is repeated.
[0037]
If a response signal is received from the center device 6, communication such as sending out a fire abnormality signal, a property code or the like to the center device 6 is performed in S112 (S112).
[0038]
Thereafter, the DC loop of the telephone line 4 is released (S107), the timer 53 is reset (S108), and the process returns to S101.
[0039]
On the other hand, when there is no state change in S102, the process proceeds to S103. In S103, it is determined whether or not the timer 53 has expired. If the time has not expired, the process returns to S102 and continues to monitor the property state change. When the timer 53 expires, the communication unit 55 closes the DC loop of the telephone line 4. Then, the regular notification telephone number is read from the storage unit 56 and dialed (S105).
[0040]
When the reception of the ring back tone from the exchange 3 is detected (S106), the DC loop of the telephone line 4 is immediately released (S107). Then, the timer 53 is reset (S108), and the process returns to S101.
[0041]
Next, the center device 6 will be described. FIG. 7 is a block diagram of the center device 6. The center device 6 includes an abnormality notification communication unit 61 that connects the abnormality notification signal of the notification device 5 to the reception telephone line 4a, and a periodic notification communication unit that connects the periodic notification of the notification device 5 to the reception telephone line 4b. 62, a timekeeping unit 64 that measures the current time, a storage unit 65 that stores a program for operating the center device 6 and various data, a display unit 66 that is a display that displays the current state of the property, occurrence of a periodic abnormality, and the like, control The operation unit 67 is operated when an operator confirms an abnormality, and the control unit 63 controls these center devices.
[0042]
Here, the reason why the center device 6 has the telephone line 4a for receiving the abnormality report and the telephone line 4b for receiving the periodic report will be described.
[0043]
In the case of a machine security system, a large number of notification devices 5 are connected to one center device 6 via a telephone line 4. Since the center device 6 can receive the notification from the notification device 5 only through the subscriber line connected to the exchange 3, the notification device 5 transfers to the center device 6 depending on the availability of the subscriber line. The time required for signal transmission is determined. For this reason, if an abnormal report such as a highly urgent fire signal or intruder detection signal and a regular report with a relatively low urgency but a large number of reports are received on the same subscriber line, a highly urgent abnormal report The arrival at the center device may be interrupted and delayed by periodic notification.
[0044]
Therefore, in this embodiment, the center device 6 is connected to the telephone line 4a for receiving the abnormality report and the telephone line 4b for receiving the periodic report.
[0045]
As shown in FIG. 9, the storage unit 65 stores the property code, the telephone number of the reporting device, the periodic reception time, the current state, etc. for each customer.
[0046]
FIG. 12 is a flowchart showing the reception operation of the center device 6.
[0047]
The center device 6 monitors whether the information receiving terminal activation signal is received from the exchange 3 by the abnormality notification communication unit 61 or the periodic notification communication unit 62 (S201). When the information receiving terminal activation signal is received in S201, the DC loop of the received telephone line 4a or 4b is closed (S202). Then, the subscriber line number of the telephone line connected to the notification device 5 sent from the exchange 3 (hereinafter referred to as the telephone number of the notification device) is received (S203), and then the DC loop of the telephone line is set. Open (S204). If it is the information reception terminal activation signal from the regular notification telephone line 4b in S205, the process proceeds to S206. In S206, the periodic reception time in the storage unit 65 is updated and stored at the current time input from the time measuring unit 64 (S206), and the process returns to S201. Note that. Although not shown, when a predetermined time has elapsed from the regular reception time, non-reception of regular notification is displayed on the display unit 66. When the controller sees this display, it prompts the person to deal with the relevant property and maintains the safety of the property.
[0048]
If it is an information reception terminal activation signal from the telephone line 4a in S205, the process proceeds to S207. In S207, it is monitored whether or not a call signal is received a predetermined number of times within a predetermined time from the exchange 3 thereafter. If a predetermined number of calling signals are not received within a predetermined time (S212), the process returns to S201. On the other hand, when the call signal is received, the DC loop of the telephone line 4a is closed (S208), and the status signal and the like from the notification device 5 are received (S209). And while changing the display of the display part 66, the memory content of the memory | storage part 65 is updated and memorize | stored (S210), the direct current | flow loop of the telephone line 4a is open | released (S211), and it progresses to S206. Also, here, an abnormal signal is received.TrustIn such a case, it is preferable to display the abnormality on the display unit 66 so as to be noticeable. Then, the controller sees the abnormality display and appropriately handles such as prompting the coping person to the property. Although not described in this flow, when the center device 6 receives a call signal due to a wrong call or the like, unlike the signal transmission of the notification device 5, the center device 6 cannot receive a signal of the current state or the like. Open the DC loop.
[0049]
Next, the operation of the mechanical security system configured as described above will be described with reference to FIG.
[0050]
First, when the notification device 5 closes the telephone line 4 for regular transmission, a dial tone is returned from the exchange 3 to the notification device 5. Then, the notification device 5 sends the telephone number (selection signal) for periodic notification of the center device 6 to the exchange 3.
[0051]
Next, the exchange 3 sends an information reception terminal activation signal to the regular notification telephone line 4 b connected to the center device 6. Upon receiving this information reception terminal activation signal, the periodic notification communication unit 62 of the center device 6 operates the line closing / opening means to close the DC loop of the telephone line 4b. Then, the telephone number of the notification device 5 transmitted from the exchange 3 is received by the periodic notification communication unit 62. When the reception is completed, the periodic report receiving unit 62 opens the DC loop of the telephone line 4b. At this time, as described above, the periodic reception time is stored in the storage unit 65 in association with the telephone number of the reporting device 5, and the display on the display unit 66 is changed.
[0052]
On the other hand, when the exchange 3 recognizes that the DC loop of the regular notification telephone line 4 b of the center device 6 is open, it sends a ringback tone to the notification device 5. When the communication device 55 detects the ring back tone, the reporting device 5 opens the DC loop of the telephone line 4.
[0053]
In the center device 6, even if a call signal is received, the telephone line is not closed until a call signal is received a predetermined number of times or more.
[0054]
Accordingly, the center device 6 can recognize that the notification device 5 has performed a notification operation before the notification device 5 and the center device 6 are connected. As a result, it takes only a very short time to occupy the telephone line 4, so that a communication system with good communication efficiency can be provided. Further, since the normality of the reporting device 5 and the telephone line 4 can be confirmed by the center device 6 without connecting the line between the reporting device 5 and the center device 6, there is no need for a telephone line connection fee and frequent reporting is performed. In a machine security system, an emergency notification system, or the like that requires confirmation of the state of the device 5, the reliability of the system can be improved at a low cost. Further, the abnormality report and the periodic report can be distinguished by receiving the abnormality report and the periodic report separately on the telephone line 4a for receiving the abnormality report and the telephone line 4b for receiving the periodic report. And the low-urgency notification (for example, regular notification) in the machine security system does not prevent transmission of the high-urgency notification (for example, fire signal or intruder detection signal notification) to the center device 6. This improves the security of the machine security system.
[0055]
Next, a second embodiment will be described with reference to FIGS.
[0056]
FIG. 13 is a diagram illustrating a system configuration of the machine security system according to the second embodiment.
[0057]
As shown in the figure, in the mechanical security system, a reporting device 7 is installed in each of a plurality of buildings to be guarded, and is connected to a center device 8 via a telephone line 4. The center device 8 is connected to the exchange 3 through a single telephone line 4c. Here, one telephone line does not physically refer to one telephone line, but is received on the same telephone line without distinguishing between a telephone line for anomaly reporting and a telephone line for periodic reporting. It means to do. In other words, in the case of the first embodiment, the abnormality notification and the periodic notification are configured so that the telephone line 4a for receiving the abnormality report and the telephone line 4b for the periodic notification can be distinguished and received according to the type of notification. Are received via the telephone line 4c.
[0058]
In the reporting device 5 of the first embodiment and the reporting device 7 of the present embodiment, the reporting device 5 stores two destination phone numbers, whereas the reporting device 7 has one destination phone number. It is memorized and the report destination of the abnormal report and the regular report is the same.
[0059]
Further, the center device 6 of the first embodiment and the center device 8 of the present embodiment are such that the center device 6 has a communication unit for abnormality notification and a communication unit for periodic notification, and is separately provided for each of two telephone lines. In contrast to the connection, the center device 8 has one communication unit in one telephone line 4c, and the received signal processing operation described later is different. Since the other points are basically the same as those of the first embodiment, description thereof will be omitted.
[0060]
The operation of the center device 8 will be described with reference to FIG.
[0061]
The center device 8 stands by until an information reception terminal activation signal is received from the exchange 3 (S301). When the information receiving terminal activation signal is received in S301, the DC loop of the received telephone line 4c is closed (S302). Then, the subscriber line number of the notification device 7 (hereinafter referred to as the telephone number of the notification device) sent through the exchange 3 is received (S303), and then the DC loop of the telephone line 4c is released (S304). ). In step S305, the number of call signals sent from the exchange 3 is counted. If the predetermined number of times, for example, three is counted, the process proceeds to step S307. On the other hand, if the call signal is not counted three times within the predetermined time, the process proceeds to S306, the periodic reception time is updated, and the process returns to S301. When the notification device 7 detects the ringback tone, the notification device 7 opens the DC loop of the telephone line 4, so that the call signal is not sent out from the exchange 3 many times. For this reason, the predetermined number of times is appropriately set to a number larger than the number of calling signals sent from the exchange 3 until the DC loop is opened after the notification device 7 receives the ringback tone.
[0062]
In S307, the DC loop of the telephone line 4c is closed, and a status signal or the like from the notification device 7 is received (S308). And while changing the display of a display part, the memory content of a memory | storage part is updated and memorize | stored (S309), the direct current | flow loop of the telephone line 4c is open | released (S310), and it progresses to S306.
[0063]
With reference to FIG. 14, the operation of the machine security system of the second embodiment will be described.
[0064]
First, when the reporting device 7 closes the telephone line 4 for reporting an abnormality, a dial tone is returned from the exchange 3 to the reporting device 7. Then, the notification device 7 sends the telephone number (selection signal) of the center device 8 to the switching device 3 to the center device 8.
[0065]
Next, the exchange 3 sends an information reception terminal activation signal to the telephone line 4 c connected to the center device 8. The center device 8 closes the DC loop of the telephone line 4c. Then, the telephone number of the notification device 7 transmitted from the exchange 3 is received. When reception is completed, the DC loop of the telephone line 4c is opened. When the exchange 3 recognizes that the DC loop of the telephone line 4c of the center apparatus 8 is open, it sends a ringback tone to the notification apparatus 7 via the telephone line 4c. Even if the notification device 7 receives the ringback tone, the notification device 7 does not open the DC loop and waits for a response signal from the center device 8 when an abnormality notification is received. When the center apparatus 8 receives the call signal sent from the exchange 3 a predetermined number of times (three times in this embodiment), the DC loop of the telephone line 4c is closed. Thus, the notification device 7 and the center device 8 are connected via the telephone line 4. Then, the center device 8 sends a response signal (not shown) to the notification device 7. When receiving the response signal, the reporting device 7 starts sending an abnormal signal, a property state, etc. to the center device 8. Thereafter, when the communication is completed, the reporting device 7 and the center device 8 each open the DC loop of the telephone line 4 and terminate the reporting operation.
[0066]
Also, in the case of periodic notifications, when the notification device 7 receives the ringback tone in A in the figure, the DC loop of the telephone line 4 is released, so that the exchange signal is sent three times from the exchange 3 to the center device 8. Not. For this reason, the center device 8 does not close the DC loop of the telephone line 4c again, and the process of updating the periodical reception time is performed and the periodical notification process is terminated.
[0067]
As a result, even when the center device 8 is a single telephone line, it is possible to perform processing by distinguishing between an abnormal report and a regular report.
[0068]
In the present embodiment, periodic notification and abnormality notification are distinguished by the number of receptions of the call signal. However, in the case of abnormality notification, a code that rejects notification of the subscriber line number when dialing from the notification device 7 (for example, In addition, “184”) is added to the head of the telephone number of the center device 8 so that it is not added in the case of periodic notification, and the abnormality notification and the regular notification can be distinguished by the center device 8.
[0069]
In this case, the processing of the center device 8 can be realized by changing S305 in FIG. That is, if the telephone number of the reporting device 7 is included in the signal sent from the exchange 3 to the center device 8 via the telephone line 4c in S303, it is determined that the regular notification is made in S305. On the other hand, if the telephone number of the reporting device 7 is not included, it is determined that there is an abnormality report. If it is determined that the periodic notification is made, the processing of S306 is performed. If it is determined that the notification is abnormal, the processing proceeds to S307.
[0070]
With this method, compared with the case of the second embodiment, it is shortened by the time for counting the calling signal, and the abnormal signal can reach the center device earlier.
[Brief description of the drawings]
FIG. 1 is a system configuration diagram of a communication system according to the present invention.
FIG. 2 is a block diagram of a transmission apparatus according to the present invention.
FIG. 3 is a block diagram of a receiving apparatus according to the present invention.
FIG. 4 is an operation flow of a communication system according to the present invention.
FIG. 5 is a system configuration diagram of the machine security system according to the first embodiment.
FIG. 6 is a block diagram of a notification device according to the first embodiment.
FIG. 7 is a block diagram of the center device according to the first embodiment.
FIG. 8 shows data stored in the storage unit of the reporting device according to the first embodiment.
FIG. 9 shows data stored in the storage unit of the center device according to the first embodiment;
FIG. 10 is an operation flow of the machine security system according to the first embodiment.
FIG. 11 is a processing flow of the reporting device according to the first embodiment.
FIG. 12 is a processing flow of the center device according to the first embodiment;
FIG. 13 is a system configuration diagram of a machine security system according to a second embodiment.
FIG. 14 is an operation flow of the machine security system according to the second embodiment.
FIG. 15 is a processing flow of the center device according to the second embodiment;
[Explanation of symbols]
1 ... Transmitter
11 Ring ring tone detection means
12 ... Line closing / opening means
13: Line control means
2 ... Receiver
21 ... Storage means
211 .. Memory
212..Storage control means
213 Timekeeping means
22 ... Receiving means
23: Circuit closing / opening means
24. Activation signal receiving means
25 ... Line control means
3 ... Switch
4 ... Telephone line
4a ... Telephone line for receiving error reports
4b: Telephone line for receiving periodic reports
4c ... telephone line
5,7 ... Notification device
51 ... Sensor input part
52 ... Operation display section
53 ... Timer
54 ... Control unit
55 ... Communication Department
56... Storage unit
6,8 ・ ・ Center equipment
61 ・ ・ ・ Communication section for error reporting
62 ... Communication department for periodic reports
63 ... Control unit
64 ... Timekeeping section
65: Storage unit
66 ... Display section
67 .. operation unit

Claims (3)

In a communication system using a telephone line for notifying the receiver of the subscriber line number of the transmitter,
The transmitter is
Line closing / opening means for closing and opening the telephone line;
A ringback tone detecting means for detecting a ringback tone output from the exchange;
A communication means for closing the line and sending the telephone number of the receiving device to the exchange when the dial tone is returned from the exchange , and opening the line when the ringback tone sent from the exchange is detected;
The receiving device is:
An activation signal receiving means for receiving an activation signal from the exchange;
Line closing / opening means for closing and opening the telephone line;
Receiving means for receiving a subscriber line number of the transmitting device from the exchange;
It closes the line when receiving the activation signal, and opens the line Upon completion of reception of the subscriber line number, that it has a line control means for Ru ringback tone is sent to the exchange to said transmitting device A featured communication system. A receiving device used in a communication system using a telephone line for notifying a receiving device of a subscriber line number of a transmitting device,
An activation signal receiving means for receiving an activation signal from the exchange;
Line closing / opening means for closing and opening the telephone line;
Receiving means for receiving a subscriber line number of the transmitting device from the exchange;
A line control means for closing the line when receiving the activation signal, opening the line when reception of the subscriber line number is completed, and causing the exchange to send a ringback tone to the transmitter;
Storage means for storing the subscriber line number of the transmitter and the time when the subscriber line number notification is received;
A receiving apparatus. 2. The communication system according to claim 1, wherein the transmission device includes storage means for storing a plurality of transmission destination telephone numbers and transmission destination selection means for selecting transmission destination telephone numbers according to transmission contents.

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