JPH06276304A - Subscriber line interrupt detection notice system - Google Patents

Abstract

PURPOSE:To inform it to a predetermined notice destination when a subscriber line is interrupted. CONSTITUTION:A subscriber's house 1 is provided with a means 10 sending a predetermined signal to a line from a subscriber side in the non-talking state. A telephone station 2 is provided with an interruption monitor notice device 20 which monitors said signal from the subscriber side and discriminates it that the subscriber line 4 is interrupted when said signal is not received and notifies it to a preset notice destination.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a subscriber line disconnection detection / report system suitable for use in, for example, an unmanned emergency report system.

[0002]

2. Description of the Related Art An abnormal situation such as a fire, a gas leak, or an intrusion of bandits is monitored unattended by using a sensor or a video camera, and when such an abnormal situation occurs, it is automatically notified to a report destination such as a security company. In addition, there is known an emergency notification system for making a notification to that effect.

In this kind of emergency call system, a telephone line is generally used as a transmission line for information for a call, and when an abnormal situation as described above occurs, the telephone line is connected to the telephone subscriber line. The terminal device automatically dials a security company or the like via a telephone line, and reports the occurrence of an abnormal situation, the place of occurrence, the content of the abnormality, etc.

[0004]

However, for example, if a bandit cuts off the telephone subscriber line before entering, even if the terminal device can detect the subsequent intrusion of the bandit, the security company or the like can detect this. , It is not possible to make a call and cannot be used as an emergency alert system.

In view of the above points, an object of the present invention is to provide a system capable of automatically notifying a notification destination such as a security company when a telephone subscriber line is disconnected. .

[0006]

In order to solve the above problems, a subscriber line disconnection detection and notification system according to the present invention is
Corresponding reference numerals in the embodiments described later, means 1 for transmitting a predetermined signal from the subscriber side to the line during non-call
0 is provided, the station side monitors the signal from the subscriber side, and when the signal is not received, it is determined that the subscriber line is disconnected, and the preset destination is notified. A disconnection monitoring and reporting device 20 is provided.

[0007]

In the present invention having the above-mentioned structure, the disconnection monitoring / issuing device provided on the station side determines whether or not there is a signal sent from the subscriber side through the subscriber line. The disconnection is monitored, and when the disconnection is detected, the preset notification destination is notified. Since the disconnection monitoring and alerting device that monitors the disconnection of the subscriber line and notifies the notification destination that the disconnection has occurred is installed on the station side, even if the subscriber line on the terminal side is disconnected, the notification destination Will be reliably notified.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a subscriber line disconnection detection and notification system according to the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an overall outline of the subscriber line disconnection detection and notification system of this example. 1 is a subscriber's house, 2 is a telephone station, 3 is a report destination, for example, a security company, The subscriber's house 1 and the telephone station 2 and the telephone station 2 and the security company 3 are connected by subscriber lines (telephone lines) 4 and 5, respectively.

The subscriber's home 1 is provided with a telephone 11, a terminal device 12 of the emergency alert reporting system, and a disconnection monitoring device 10 for the subscriber line. As described above, the terminal device 12 uses a heat sensor, a smoke sensor, a gas sensor, a door / window opening / closing sensor, an intruder detection sensor, a video camera, and the like to monitor a fire, a gas leak, an intruder's intrusion, and the like. To do. When the terminal device 12 detects these abnormal situations, the terminal device 12 calls the security company 3 by automatic dialing, waits for a response from the security company 3, and joins the place where the abnormal situation occurs, the abnormal content, and other necessary information. It is sent to the security company 3 via the main line 4, the telephone station 2, and the subscriber line 5.

The telephone station 2 is provided with an exchange 21. In this example, in particular, the disconnection of the subscriber line 4 on the subscriber home 1 side is monitored, and when the disconnection is detected, the security company 3 The disconnection monitoring alarm device 20 that notifies the
It is provided between the exchange 21 and the subscriber line 4.

In this example, the disconnection monitoring device 1 of the subscriber home 1
A disconnection of the subscriber line 4 is detected by ping-pong transmission of a PB (push button) signal between 0 and the disconnection monitoring / reporting device 20 provided on the telephone station 2 side. In Figure 2,
FIG. 3 shows a circuit block diagram of an example of the disconnection monitoring device 10 of the subscriber's home 1, and FIG. 3 shows a circuit block diagram of an example of the disconnection monitoring and reporting device 20 provided in the telephone station 2. The disconnection monitor device 10 and the disconnection monitor alarm device 20 can accommodate both DP line (dial line) and PB line (push line). Further, as the power source, a commercial power source of AC 100 V, which has been converted to a predetermined DC voltage by the AC adapters 30 and 40, is used. The DC voltage from the AC adapters 30 and 40 is the power supply terminal 1 respectively.
Regulators 101 and 201 through 0p and 20p
To a stable DC voltage of 5 V and 2.5 V, and is supplied to each circuit of the devices 10 and 20 as its power supply voltage. Although not shown, the power source is backed up by a battery in case of a power failure.

The disconnection monitoring device 10 of the subscriber's home 1 shown in FIG. 2 is further configured as follows. Terminal 10
The terminals a and 10b are connected to the subscriber line 4 (4L1, 4L2), and the terminals 10d and 10e are connected to two cables for connection with the terminal device 12. In addition, terminal 1
0c is connected to the ground terminal.

Terminals 10a and 10b and terminals 10d and 10
e is connected to each other via the protection circuit 102 and the loop detection circuit 103. The loop detection circuit 103 is
The opening / closing of the loop circuit on the subscriber home 1 side is detected. That is, on-hook and off-hook are detected to detect whether or not a call is in progress. The detection output of the loop detection circuit 102 is supplied to the control circuit 110 composed of a microprocessor.

As will be described later, the disconnection monitoring device 10 disconnects the subscriber line 4 by performing ping-pong transmission of the PB signal with the disconnection monitoring and reporting device 20 on the telephone station 2 side during a non-call. To detect. That is, the PB signal T1 sent from the disconnection monitoring / issuing device 20 via the subscriber line 4
Through the protection circuit 102 and the differential amplifier 104.
The receiver 105 receives and detects. The detection output is supplied to the control circuit 110. In addition, the control circuit 11
0 supplies a control signal to the PB sender 106 to generate the PB signal T2. This PB signal T2 (PB signal T2
Is composed of a set of frequencies different from those of the PB signal T1).
Is transmitted to the subscriber line 4 via the amplifier 107 and the protection circuit 102.

Further, in the disconnection monitoring circuit 10 of this example, when the control circuit 110 detects the disconnection of the subscriber line 4, the control circuit 110 turns on the LED 108 and drives the relay 109 to cause an alarm buzzer. Sound. That is, when the relay 109 is driven, the contact switch 109SW is switched to the make contact side (the state opposite to the state shown in the figure), and the terminals 10f and 10g.
Alarm buzzer that is connected between the two terminals or between terminals 10h and 10f sounds.

A switch 1 is provided between the terminals 10f and 10g.
09SW is switched to the make contact side, and an alarm buzzer of a type that is driven and sounds when the closed circuit is turned off is connected (or switch 109SW is switched to the make contact side between terminals 10h and 10f). , The alarm buzzer of the type that is driven and sounds when the closed circuit is turned on is connected).

The disconnection monitoring / issuing device 20 on the telephone station 2 side in FIG. 3 is further configured as follows. Terminal 20
The terminals a and 20b are connected to the subscriber line 4 (4L1, 4L2), and the terminals 20d and 20e are connected to two cables for connection with the exchange 21. The terminal 20
c is connected to the ground terminal. Terminals 20a, 20b
And the terminals 20d and 20e are connected via the protection circuit 202 and the contact switches 209S1 and 209S2 of the relay 209. Therefore, normally, the subscriber line 4
Are directly connected to the exchange 21.

The disconnection monitoring / issuing device 20 detects the disconnection of the subscriber line 4 by performing ping-pong transmission of the PB signal with the disconnection monitoring device 10 on the subscriber home 1 side during a non-call.

The voltage detection circuit 211 monitors the voltage of the subscriber line 4 to detect the call termination, and detects whether the call is in progress or in the non-communication state. The detection output is supplied to the control circuit 210 including a microprocessor. And
The PB signal T2 sent from the disconnection monitoring device 10 via the subscriber line 4 is a protection circuit 202 and a differential amplifier 204.
Is supplied to the PB receiver 205 via the
2 is detected. The detection output is supplied to the control circuit 210. Further, the control circuit 210 uses the PB sender 206.
To generate a PB signal T1. The PB signal T1 is opened and closed by the control circuit 210, the gate circuit 212, the amplifier 207, and the protection circuit 202.
Is sent to the subscriber line 4 via.

Further, in the disconnection monitoring / issuing circuit 20 of this example, when the control circuit 210 detects a disconnection of the subscriber line 4, the control circuit 210 turns on the LED 208 and informs the security company 3 of that fact. Make a report. Therefore, in the disconnection monitoring and reporting device 20, the switch 209
Make contacts of S1 and 209S2 and PB sender 206
A reverse detection / collision detection circuit 221, a loop formation circuit 222, and an audio amplifier 223 are connected between and. Further, a memory 224 for storing dial signals for automatically dialing the security company 3, notification voice signals, identification signals of the subscriber's home 1 (for example, telephone numbers), etc. is provided.

Further, a setting input operation section 225 for registering the telephone number of the security company 3 of the report destination and the identification signal of the subscriber's home 1 in the memory 224 is provided. The input operation unit 225 also sets whether the line is a dial line or a push line. A display 227 is provided to confirm an input operation in the input operation unit 225, and a display drive signal corresponding to the input operation is displayed from the control circuit 210 via the drive circuit 226.
7 is supplied.

Then, when the control circuit 210 detects the disconnection of the subscriber line 4, the control circuit 210 notifies the security company 3 of the disconnection of the subscriber line of the subscriber house 1 by the following notification sequence. Actuates relay 209 to switch 209S1 and 2
09S2 is switched to the make contact side. The reverse detection and collision detection circuit 221 confirms that there is no incoming signal from the exchange 21. The loop forming circuit 222 closes the loop. The telephone number of the report destination is automatically dialed using the data stored in the memory 224. That is, when the subscriber line is a dial line, the loop forming circuit 222 causes the control circuit 21 to
The opening and closing is controlled by the control signal from 0, the dial pulse is sent out, and in the case of the push line, the PB sender 2
The dial signal of the PB signal is transmitted from 06. After dialing, reverse detection and collision detection circuit 22
1 detects the reverse, that is, when there is an incoming call response to the callee, the identification signal of the subscriber's home 1 in the memory 224, in this example, the subscriber's home telephone number, is sent to the PB sender 20.
Repeat from 6 to several times. At this time, a message for disconnecting the subscriber line may be sent together. Disconnect the line. That is, the contact switches 209S1 and 209S2 of the relay 209 are returned to the break contact side. When the circuit 221 cannot detect the reverse even when dialing the report destination, the line is once disconnected, and then the above-described sequences 1 to 3 are repeated again.

Next, the disconnection monitoring device 10 of the subscriber's home 1
Ping-pong transmission of the PB signal through the subscriber line 4 between the disconnection monitoring and reporting device 20 of the telephone station 2 and disconnection detection of the subscriber line 4 will be described.

In this case, the PB signal T1 sent from the disconnection monitoring / issuing device 20 and the PB signal T2 sent from the disconnection monitoring device 10 are PB signals having different combinations of frequencies.

FIG. 4 is a diagram showing an example of the transmission timings of the PB signal T1 sent from the disconnection monitoring and issuance device 20 and the PB signal T2 sent from the disconnection monitoring device 10.
That is, first, the disconnection monitoring and reporting device 20 on the telephone station 2 side.
For the period of 100 msec for PB signal T1
And sends the PB signal T1 for 900 msec. Then, when 1000 msec has elapsed from the start of sending the PB signal T1, the PB signal T1 is sent again for a period of 100 msec, and the sending is paused for the next 900 msec. Thereafter, this is repeated during the non-call state. It should be noted that the condition for starting the transmission of the PB signal T1 in the disconnection monitoring and issuance device 20 is that 5 seconds have elapsed after the on-hook state was detected. Further, when the off-hook state is detected, the transmission of the PB signal T1 is immediately stopped.

On the other hand, the disconnection monitoring device 10 on the subscriber home 2 side receives the PB signal T1 from the disconnection monitoring and issuing device 20, and when this signal T1 is detected, waits for the PB signal T1 to stop. , 100 msec period, PB signal T
2 is sent to the disconnection monitoring and reporting device 20 side. After that, this is repeated. The condition for sending the PB signal T2 from the disconnection monitoring device 10 is when 100 msec or more has elapsed after the PB signal T1 was detected in the on-hook state. When the PB signal T1 cannot be detected in the off-hook state, the transmission of the PB signal T2 is immediately stopped.

The disconnection monitoring device 10 has no call current,
When the reception of the PB signal T1 cannot be detected, it is determined that the subscriber line 4 is broken, the LED 108 is turned on, and the alarm buzzer sounds.

Further, the disconnection monitoring / issuing device 20 disconnects the subscriber line 4 when the PB signal T2 from the disconnection monitoring device 10 cannot be detected in the on-hook state (that is, the non-communication state). to decide. And several times, PB
When the signal T1 is sent to the subscriber's home 1 side and the reception of the PB signal T2 from the subscriber's home 1 is still not detected, the security company 3 is notified as described above.

Next, a disconnection detection sequence will be described with reference to some examples. First, the example of FIG. 5 is a sequence in the case where the start-up is in a standby state (non-communication time) and then the subscriber line 4 is disconnected.

First, the disconnection monitoring / issuing device 20 on the telephone station 2 side.
Then, 5 seconds after the on-hook is detected, PB
Transmission of the signal T1 is started. In the disconnection monitoring device 10 on the subscriber home 1 side, after the on-hook is detected, the PB signal T2 is waited for after the PB signal T1 from the device 20 is detected and then the PB signal T2 is transmitted.
Is transmitted for a period of 100 msec.

When the disconnection monitoring / issuing device 20 detects a lapse of 1 second from the previous transmission of the PB signal T1, it outputs 100 ms.
The PB signal T1 of ec is repeatedly transmitted, and the PB signal T2 from the disconnection monitoring device 10 is detected. In the on-hook state, the disconnection monitoring device 10 repeats the sequence of transmitting the PB signal T2 after waiting 100 msec or more from the detection time point of the PB signal T1 as long as the PB signal T1 can be detected. After that, the above sequence is repeated to enter the standby state.

In this standby state, when the subscriber line 4 is disconnected, even if the disconnection monitoring / reporting device 20 sends the PB signal T1, the disconnection monitoring device 10 cannot detect this. Therefore, the PB signal T2 is not transmitted. Therefore, the disconnection monitoring and reporting device 20 cannot detect the PB signal T2, repeats the transmission of the PB signal T1 several times, and outputs the PB signal T2.
After confirming the non-detection of No. 2, the security company 3 is notified as described above.

The disconnection monitoring device 10 sounds the alarm buzzer after confirming that the PB signal T1 has not been sent for a predetermined time even during non-call.

Next, FIG. 6 is a sequence when a telephone call is made from the telephone of the subscriber's home 1 during the standby sequence of FIG. That is, when the off-hook operation is performed on the telephone 11, the disconnection monitoring device 10 and the disconnection monitoring reporting device 2
At 0, this off-hook is detected. Then, telephone station 2
In the disconnection monitoring and reporting device 20, the transmission of the PB signal T1 is immediately stopped. On the other hand, the disconnection monitoring device 10 of the subscriber home 1
Detects the stop of the PB signal T1 when the PB signal T1 cannot be detected for a predetermined time.

In this state, when the dialing operation of the other party is performed by the telephone set 11, the DP signal or the PB signal corresponding to the dialing operation is sent to the exchange 21 via the subscriber line 4 and the other party's response is given. If there is, a call path is formed and a call is established.

When an on-hook operation is performed on the telephone 11 by ending the call or the like, the disconnection monitoring device 10 and the disconnection monitoring reporting device 20 detect the on-hook. After that, a standby state is entered, and the sequence after rising in FIG. 5 is repeated.

Next, FIG. 7 shows a sequence in the case where there is an incoming call during standby and then the subscriber line 4 is down. That is, an incoming signal is transmitted from the exchange 21 of the telephone station 2 to the subscriber's home 1. The telephone set 11 of the subscriber's house 1 receives the incoming signal and causes the ringer to ring. When the telephone 11 goes off-hook in response to the ringer ringing, a response signal is sent to the exchange 21, and the off-hook is detected by the disconnection monitoring device 10 and the disconnection monitoring reporting device 20.

Then, in the same manner as when the call is originated, the disconnection monitoring and reporting device 20 of the telephone station 2 immediately stops the transmission of the PB signal T1. On the other hand, the disconnection monitoring device 10 of the subscriber home 1
Detects the stop of the PB signal T1 when the PB signal T1 cannot be detected for a predetermined time. And exchange 2
1 establishes a call path between the subscriber's home 1 and the other party, and enters a call state.

When an on-hook operation is performed on the telephone 11 by terminating a call or the like, the disconnection monitoring device 10 and the disconnection monitoring alarm device 20 detect the on-hook, and thereafter, the standby state is entered, and the disconnection monitoring device shown in FIG. Repeat the sequence after rising.

When the subscriber line 4 is disconnected during a call, the voltage detection circuit 211 of the disconnection monitoring / reporting device 20 determines that the voltage change at the disconnection is the end of the call. Therefore, as shown in FIG. 5, the ping-pong transmission by the PB signals T1 and T2 tries to rise, but this cannot be achieved. Therefore, in the same way as the sequence at the time of disconnection detection,
The disconnection of the subscriber line 4 is detected, and the device 20 causes the security company 3
Will be notified.

The above example is for the case of ping-pong transmission in which the sending of the PB signal T1 from the disconnection monitoring / issuing device 20 provided on the telephone station 2 side is a start condition. It is also possible to transmit the PB signal T2 from 10 continuously or intermittently, and the device 20 can detect the disconnection of the subscriber line 4 by receiving and detecting this.

However, when the ping-pong transmission as in the above example is performed, it is possible to confirm whether the disconnection monitoring device 10 on the subscriber side is operating correctly on the disconnection monitoring and reporting device 20 side, and vice versa. Thus, it becomes possible to check the disconnection monitoring device 10 side for a connection error of the disconnection monitoring and reporting device on the telephone station 2 side.

[0044]

As described above, according to the present invention, the disconnection monitoring and alerting device for detecting the disconnection of the subscriber line and notifying it to the destination is provided on the telephone station side. Even if the public line is disconnected, the security company will be notified to that effect. Therefore, even if a thief disconnects the subscriber line before the intruder can break it, the disconnection of the subscriber line can be notified to the security company as an abnormality, and the security company, etc. must take appropriate measures. Is something that can be done.

[Brief description of drawings]

FIG. 1 is a diagram showing an overall configuration of a subscriber line disconnection detection and notification system according to the present invention.

FIG. 2 is a circuit block diagram of an example of a disconnection monitoring device installed on the subscriber home side.

FIG. 3 is a circuit block diagram of an example of a disconnection monitoring and reporting device installed on the telephone office side.

FIG. 4 is a diagram for explaining ping-pong transmission used in an example of a subscriber line disconnection detection method according to the present invention.

FIG. 5 is a diagram showing an example of a subscriber line disconnection detection sequence.

FIG. 6 is a diagram showing an example of a subscriber line disconnection detection sequence.

FIG. 7 is a diagram showing an example of a subscriber line disconnection detection sequence.

[Explanation of symbols]

 1 subscriber home 2 telephone station 3 security company 4 subscriber line 10 disconnection monitoring device 20 disconnection monitoring alarm device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Itaro Yokoyama 6-10-13 Nakanobu, Shinagawa-ku, Tokyo Inside the Daiko Electric Mfg. Co., Ltd. (72) Hajime Mizutani 6-10-13 Nakanobu, Shinagawa-ku, Tokyo Stock company Daiko Denki Seisakusho

Claims (2)

[Claims] 1. When the subscriber side is provided with means for transmitting a predetermined signal to the line during non-call, and the station side monitors the signal from the subscriber side and does not receive the signal. A subscriber line disconnection detection and notification system, which is provided with a disconnection monitoring and reporting device for determining that a subscriber line has been disconnected and for notifying a preset notification destination. 2. A non-caller transmits a first signal from a reporting device provided on the station side to a subscriber side, and the subscriber side receives the first signal and then transmits the first signal. A second signal different from the above signal is transmitted to the station side, and when the disconnection monitoring and reporting device provided at the station side does not receive the second signal from the subscriber side, the subscriber line is A subscriber line disconnection detection and notification system, characterized in that it is judged that the connection has been disconnected and a notification is made to a preset address.