JP7275867B2 - emergency call device - Google Patents

Description

TECHNICAL FIELD The present invention relates to an emergency call device for making an emergency call to an emergency call agency such as a police station, Japan Coast Guard, or fire station.

In an emergency call device that makes an emergency call to a special number (110, 118, 119), which is the telephone number of the emergency call system (hereinafter referred to as the command center) of the emergency call agency such as the police station, the Japan Coast Guard, and the fire department, traffic To make an emergency call by capturing a telephone line when an emergency call factor such as an accident or fire occurs.

For example, in the case of a fire reporting device, when the fire reporting button is pressed, the fire reporting device calls 119, which is the telephone number of the fire command center, and after the fire command center responds, a voice message is sent. to make an emergency call, and disconnect the telephone line after the emergency call. After that, the fire alarm device waits for a certain period of time for a call back from the fire control center. A private telephone or a general telephone) is answered, a reverse signal call is made, and the telephone line is disconnected after the reverse signal call is completed (Patent Document 1). It should be noted that calls to, calls to, and reverse calls to the fire control center can also be made using ordinary telephones.

In an emergency call using such an analog telephone line, after the caller (emergency call device) makes an emergency call to the command center, the caller is connected to the secondary side of the fire call device, which is in the on-hook state in the above-described normal operation. Even if the telephone connected to the caller (hereafter referred to as the secondary telephone) is in an off-hook state due to an erroneous operation, etc., the telephone network holds the line until the command center disconnects the line, making it possible for the command center to call back. I have to.

In addition, in the case of normal operation (secondary telephone is on-hook), the analog telephone line connected to the emergency call device is the line subscribed to the number display (including modem dial-in) service, and the command When the reverse message from the machine is sent by the number display procedure, the secondary phone can receive the number display information and display the caller number on the secondary phone. In addition, since the telephone dedicated to fire reporting does not normally have a caller number display function, the secondary telephone in this case is a general telephone.

Here, a case where a reverse message is sent from the command stand by the number display procedure will be described. In the case of an analog telephone line that has a contract for the number display service, the command center disconnects the line after an emergency call (usually, the command center does not disconnect the line. I'm assuming.) Therefore, when the line hold is released, the reverse message will be sent by the number display procedure. In addition, in the case of IP lines, there is no line hold function for analog telephone lines, so if you have a contract for a number display service, the reverse call from the network (or the gateway device connected to the front stage of the emergency call device) will be the number. It is sent according to the display procedure (Patent Document 2).

Japanese Patent Application Laid-Open No. 2000-106606 Japanese Patent Application Laid-Open No. 2019-4307

However, the telephone line connected to the emergency call device is a line that is subscribed to the number display service, and when the secondary telephone of the emergency call device is in the off-hook state, the reverse call from the command center will be sent to the number display. If a message is sent according to procedure 1, the emergency call device will connect the line to the secondary phone when it detects a reverse signal (incoming signal), so the command center and the secondary phone will not be in a talking state. occurs.

This problem will be explained with reference to FIG. Signals transmitted and received in the processing sequence of the emergency call device 100 shown in this figure are shown in Table 1 below.

As shown in FIG. 6, the emergency call device 100 dials (calls) a special number based on pressing of an emergency call button (step S301). More specifically, a special number selection signal is sent to the analog telephone line or metal IP telephone line of the telephone network 3 . The telephone network 3 that has detected the call to the special number calls the command console 4 (step S302).

The command console 4 transmits a response signal to the emergency call device 100 via the telephone network 3 (steps S303, S304). The emergency call device 100 makes an emergency call by transmitting a voice message to the command console 4 via the telephone network 3 (step S305), and disconnects the line. The emergency call device 100 waits for a reverse call from the command desk 4 for a certain period of time after the line is disconnected.

The command console 4 sends a reverse signal to the telephone network 3 (step S306), and the telephone network 3 transmits a CAR signal as a reverse signal to the emergency call device 100 according to the number display procedure (step S307). At this time, the secondary telephone 2 is in the off-hook state due to an erroneous operation or the like. Upon detecting the first 16 Hz of the CAR signal (incoming signal), the emergency call device 100 connects the line to the secondary-side telephone 2 in the off-hook state (step S308).

Since the secondary phone 2 is in the off-hook state, the telephone network 3 determines that it has responded to the CAR signal, and sends the number display information to the secondary phone 2 via the emergency call device 100 (step S309). . Since the secondary side telephone 2 is off-hook, the telephone network 3 becomes busy (BT: busy tone) (steps S310, S311), and reverse communication between the command desk 4 and the secondary side telephone 2 is impossible. .

SUMMARY OF THE INVENTION The present invention has been made to solve such problems, and its object is to provide an emergency call system when the telephone line connected to the emergency call system is a line subscribed to a number display service. To enable reverse call communication with a command console even if a secondary side telephone set is in an off-hook state.

The present invention consists of hook state monitoring means for monitoring the hook state of the secondary telephone, and reverse signal for detecting a reverse signal from the control desk when connected to a telephone line to which a number display service is subscribed. and a control means for controlling line connection to the secondary telephone based on the hook state monitored by the hook state monitoring means and the detection state by the gyakushin signal detection means . and, when the secondary phone is in an off-hook state, after detecting the CAR signal, the control means, based on the detection of the IR signal, does not cause the secondary phone to ring, and sends the signal to the secondary phone. This is an emergency call device that controls line connection.

According to the present invention, when the telephone line connected to the emergency call device is a line to which the number display service is subscribed, even if the secondary telephone of the emergency call device is in the off-hook state, it is possible to communicate with the command console. Reverse call is possible.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the structure of the emergency notification system which concerns on embodiment of this invention. 1 is a block diagram showing the configuration of an emergency call device according to an embodiment of the present invention; FIG. It is a figure which shows the 1st processing sequence of the emergency notification system which concerns on embodiment of this invention. It is a figure which shows the 2nd processing sequence of the emergency notification system which concerns on embodiment of this invention. It is a figure which shows the 3rd processing sequence of the emergency notification system which concerns on embodiment of this invention. FIG. 10 is a diagram showing a processing sequence of a conventional emergency call system;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.
<Emergency call system configuration>
FIG. 1 is a diagram showing the configuration of an emergency notification system according to an embodiment of the present invention.

This emergency call system is connected to an emergency call device 1 that transmits an emergency call to a command console 4 by calling an analog telephone line or a metal IP telephone line of a telephone network 3, and a secondary side (latter stage) of the emergency call device 1. It consists of a general telephone 2a, which is a secondary telephone 2, and a dedicated telephone 2b for emergency calls. An analog telephone line or a metal IP telephone line of the telephone network 3 is a line contracted for number display service. The general telephone 2a and the telephone dedicated to emergency calls 2b share a telephone line. An emergency call device 1 is an emergency call device according to an embodiment of the present invention.

The command desk 4 is a reception system of the police station, the Japan Coast Guard, or the fire station, and the special numbers, which are the telephone numbers, are 110, 118, and 119, respectively. The emergency call device 1 has a function of calling 110, 118, or 119 to make an emergency call.

The telephone dedicated to emergency calls 2b is a dedicated telephone for communicating with the command console 4. FIG. The general telephone 2a is a telephone (including a business phone, a facsimile device, etc.) that can be used while the emergency call device 1 is on standby. Note that the general telephone 2a can also make a call to the command desk 4 to make an emergency call. In addition, the general telephone 2a can also respond to a reverse message from the command desk 4 by setting in the emergency call device 1 and perform a reverse message call. Also, the general telephone 2a is compatible with the number display service (provided with a caller number display function), but the emergency telephone 2b is not compatible with the number display service.

<Configuration of emergency call device>
FIG. 2 is a block diagram showing the configuration of the emergency call device according to the embodiment of the invention.
The emergency call device 1 includes a line control section 11, a general telephone control section 12, an emergency call dedicated telephone control section 13, and a main control section 14 for controlling these sections.

The line control unit 11 is connected to an analog telephone line or a metal IP telephone line of the telephone network 3, and controls connection with the telephone network 3, detects various signals (incoming signal, CAR signal, IR signal, BT, etc.), and selects signals. send, etc. The general telephone control unit 12 controls the call route between the general telephone 2a and the line control unit 11, and the like. The emergency call phone control unit 13 controls the call route between the emergency call phone 2b and the line control unit 11, and the like.

The main control unit 14 is composed of a computer processor and memory, and monitors the hook state of the secondary phone 2 (general phone 2a and emergency call dedicated phone 2b). By checking the detection state of the reverse message signal from the telephone line at , the timing of connecting the line to the general telephone control unit 12 and the emergency call dedicated telephone control unit 13 is determined.

Next, regarding the operation of the emergency notification system according to the embodiment of the present invention, first to third processing sequences will be described in order.

<First processing sequence>
FIG. 3 is a diagram showing the first processing sequence of the emergency notification system according to the embodiment of the invention. This processing sequence is a processing sequence when a reverse message is sent according to the "number display procedure" when the secondary telephone 2 waiting for the reverse message is in the off-hook state.

As illustrated, the emergency call device 1 transmits a special number selection signal to the analog telephone line or metal IP telephone line of the telephone network 3 based on pressing of an emergency call button (step S1). The telephone network 3, which has detected the call to the special number, calls the command console 4 (procedure S2).

The command desk 4 transmits a response signal to the emergency call device 1 via the telephone network 3 (steps S3 and S4). The emergency call device 1 makes an emergency call by transmitting a voice message to the command console 4 via the telephone network 3 (step S5), and disconnects the line. The emergency call device 1 waits for a reverse call from the command desk 4 for a certain period of time after the line is disconnected.

The command console 4 sends a reverse signal to the telephone network 3 (step S6), and the telephone network 3 transmits a CAR signal as a reverse signal to the emergency call device 1 according to the number display procedure (step S7). At this time, the secondary telephone 2 is in the off-hook state due to an erroneous operation or the like.
Since the secondary phone 2 is in the off-hook state, the emergency call device 1 does not connect to the secondary phone 2 until the IR signal is detected. Therefore, even if the CAR signal is detected, the line connection to the secondary telephone 2 is not performed. At this time, the secondary phone 2 in the off-hook state is either the general phone 2a or the emergency call dedicated phone 2b.

Since the telephone network 3 does not respond to the CAR signal, it stops transmitting the number display information, etc., switches to the IR signal of the general incoming call procedure, and transmits it to the emergency call device 1 (step S8). When the emergency call device 1 detects the IR signal, it connects to the secondary telephone 2 (step S9). Due to this line connection, the secondary side telephone 2 and the command desk 4 are immediately in a state of communication (reverse communication) (step S10).

<Second processing sequence>
FIG. 4 is a diagram showing a second processing sequence of the emergency notification system according to the embodiment of the invention. This processing sequence is a processing sequence when a reverse message is sent by the number display procedure while the secondary telephone 2 waiting for the reverse message is in the on-hook state.

In this figure, steps S101 to S107 are the same as steps S1 to S7 in FIG. When the emergency call device 1 detects the first 16 Hz (incoming call signal) of the CAR signal, the secondary phone 2 is in the on-hook state, so the line connection to the secondary phone 2 is established (step S108). At this time, the secondary-side telephones 2 in the on-hook state are both the general telephone 2a and the telephone dedicated to emergency calls 2b. The emergency call device 1 makes a line connection to the general telephone 2a based on the setting.

The secondary-side telephone 2 (here, the general telephone 2a) automatically responds to the CAR signal, and the response is sent to the telephone network 3 via the emergency call device 1 (step S109). Since there was a response to the CAR signal, the telephone network 3 transmitted the number display information to the secondary telephone 2 (step S110), and the secondary telephone 2 displayed the telephone number of the command desk 4 as the caller's number. After that, the line is automatically disconnected (step S111).

The telephone network 3 that has detected the disconnection of the line transmits an IR signal as a reverse message signal to the secondary telephone 2 (step S112) to ring the incoming call. By off-hooking the secondary-side telephone 2, a reverse call is made between the secondary-side telephone 2 and the command desk 4 (step S113).

The summary of the first processing sequence and the second processing sequence described above is as follows.

[When the secondary phone is off-hook]
This is the case for the first processing sequence shown in FIG. The emergency call device 1 connects the line to the secondary side telephone 2 (general telephone 2a or emergency call exclusive telephone 2b) at the detection timing of the IR signal from the telephone network 3. FIG. In other words, the connection is made at the detection timing of the IR signal instead of at the detection timing of the incoming signal as in the processing sequence shown in FIG. In this case, even if the secondary telephone 2 to which the line is connected is the general telephone 2a that supports the number display service, the caller number is not displayed.

[When the secondary phone is on-hook]
This is the case for the second processing sequence shown in FIG. The emergency call device 1 connects the line to the secondary side telephone 2 at the detection timing of the CAR signal from the telephone network 3 . In this processing sequence, the line is connected to the general telephone 2a based on the "setting to respond to the reverse message with the general telephone 2a" in the emergency call device 1. FIG. The case of "the general telephone 2a does not respond to reverse messages" will be described later.

<Correspondence in the case of operation not responding to reverse messages with general telephone 2a>
In the case of operation that does not respond to gyakushin on the general telephone 2a, it is not necessary to respond to incoming calls by the "number display procedure" on the general telephone 2a, so set "use/not use the general telephone for gyakushin calls" Add it and do the following:
Set=Use: Perform the operations shown in FIGS.
Setting=not used: Regardless of the hook state of the secondary phone 2, the line is connected to the secondary phone 2 at the detection timing of the IR signal.

FIG. 5 is a diagram showing a third processing sequence of the emergency notification system according to the embodiment of the invention. This processing sequence is a diagram showing a processing sequence in the case where "general telephone 2a is set not to respond to reverse calls" and emergency call dedicated telephone 2b is in the on-hook state.

Procedures S201 to S210 in this figure are the same as procedures S1 to S10 in FIG. is.

The processing sequence for the case where the general telephone 2a is set to not respond to reverse calls and the emergency call dedicated telephone 2b is in the off-hook state is the processing sequence in FIG. It is changed to the telephone 2b.

If you have a contract with a number display service, it takes time (6 seconds) to change from the first incoming call (CAR signal) to an IR signal. , the time up to the IR signal can be shortened.

<Response when the hook status of the secondary phone cannot be monitored while waiting for reverse calls>
Add the setting of "number display procedure = yes / no" and perform the following actions.
Setting=Yes: Regardless of the hook state of the secondary phone 2, the line is connected to the secondary phone 2 at the detection timing of the IR signal.
Setting=None: Regardless of the hook state of the secondary phone 2, the line is connected to the secondary phone 2 at the detection timing of the incoming signal.

DESCRIPTION OF SYMBOLS 1...Emergency call device 2...Secondary telephone 2a...General telephone 2b...Emergency call dedicated telephone 3...Telephone network 4...Command desk 11...Line control unit 12...General telephone control unit 13... Emergency call dedicated telephone control section, 14... Main control section.

Claims (4)

hook state monitoring means for monitoring the hook state of the secondary telephone;
Gyakushin signal detection means for detecting a Gyakushin signal from the command desk when connected to a telephone line to which the number display service is subscribed;
Control means for controlling line connection to the secondary phone based on the hook state monitored by the hook state monitoring means and the detection state by the gyakushin signal detection means;
has
When the secondary phone is in an off-hook state, after detecting the CAR signal, the control means connects the line to the secondary phone without ringing the secondary phone based on the detection of the IR signal. An emergency call device that controls to In the emergency call device according to claim 1,
The emergency notification device, wherein the control means controls line connection to the secondary side telephone based on detection of an incoming call signal when the secondary side telephone is in an on-hook state. In the emergency call device according to claim 1,
The secondary phone is an emergency call dedicated phone and a general phone, one of which is in an off-hook state. In the emergency call device according to claim 2,
The secondary telephones are an emergency call telephone and a general telephone, and the control means controls line connection to one of the telephones based on settings when both telephones are in an on-hook state. Device.

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