JP3850565B2 - Emergency call device and method for detecting end of call - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an emergency call device for reporting to 119 or the like, and more particularly, to an emergency call device having a function of terminating a report even when a call destination end signal cannot be obtained.
[0002]
[Prior art]
In a building such as a building or a house, an emergency call device may be installed when a fire occurs or for crime prevention. In general, when a notification activation occurs, an emergency call device captures a telephone line and makes a notification.
[0003]
By the way, conventionally, when the report destination is a special number such as 119, the other party's response / end-of-call signal such as a reversal from the other party is not transmitted after dial transmission. Therefore, the other party's response (at the time of response) is detected by detecting the other party's voice, and the other party's end (at the end of the call) is detected by detecting silence for a predetermined period of time (no call sound). Is going.
[0004]
Hereinafter, with reference to FIG. 3, a conventional emergency call device 119 is described as an example of the 119 call device 10 ′.
[0005]
A conventional 119 reporting device 10 'includes a control unit 11, a memory unit 12, an incoming call detection unit 13, a voice detection unit 14, a dial tone (DT) detection unit 15, a dial transmission unit 16, and a voice transmission. Part 17.
[0006]
A fire button 20 is connected to the control unit 11. The memory unit 12 is connected to the control unit 11. The incoming call detection unit 13, the voice detection unit 14, and the DT detection unit 15 are connected to the public switched telephone network (PSTN) via the relay RL1 and also to the control unit 11. The dial sending unit 16 and the voice sending unit 17 are connected to the control unit 11 and to the PSTN via the relay RL1. The relay RL1 is connected to a call response telephone (hereinafter also referred to as “call telephone”) 30.
[0007]
Next, with reference also to FIG. 4 and FIG. 5, the operation of the 119th reporting device 10 ′ when a fire occurs will be described.
[0008]
When a fire occurs, the person who recognizes it presses the fire button 20 (step S1). Upon detecting that the fire button 20 has been pressed, the control unit 11 activates the dial sending unit 16 to send the 119th dialed number information Dial (step S2).
[0009]
The PSTN that has detected the dialed number information sends a ringing signal Ring to the firefighting command board, and sends a ringing tone (ringback tone) RBT to the 119 reporting device 10 '. In response to the ringing signal Ring, the PSTN turns off the ringing tone RBT when the fire command board is off-hook. In response to the off-off of the ring tone RBT, the 119th reporting device 10 ′ sends a message Message to the firefighting command board via the PSTN. After that, the firefighting command board sends a call signal Ring to the call back telephone 30 via the PSTN and the relay PL1 of the 119th notification device.
[0010]
In response to the ringing signal Ring, the call response telephone 30 goes off-hook, whereby a handset telephone call is performed between the call response telephone 30 and the 119th firefighting command board (step S3). When the handset call is completed, an on-hook On Hook is performed at the call back response telephone 30 and the 119th firefighting command board (step S4).
[0011]
On the other hand, in the 119 reporting device 10 ′, the voice detection unit 14 monitors the communication sound on the line (step S5 ′). Here, while the voice detection unit 14 is detecting a call sound, the control unit 11 determines that a call is in progress and does not shift to a neighboring report (step S6 ′). On the other hand, if the voice detection unit 14 fails to detect a call tone for 30 seconds, the control unit 11 determines that both the firefighting command board and the call answering telephone 30 have ended, and shifts to a neighborhood report (step S7). ').
[0012]
[Problems to be solved by the invention]
As described above, the conventional partner end-of-call (at the end of the call) is detected by detecting the silence (the state where there is no call sound) for a predetermined time by the voice detection unit 14. However, the voice detection by the voice detection unit 14 is not performed by voice identification such as speaker recognition, but is determined by the presence or absence of a signal in the voice band. Therefore, when noise occurs in this voice band, the voice detection unit 14 cannot distinguish between voice and noise, and as a result, erroneously determines that the call is ongoing. Therefore, the end of the talk cannot be made, and there is a possibility that it cannot be transferred to the neighborhood report. In other words, the subsequent operation may be hindered. Further, in the conventional method for detecting the other party's end (at the time of the end), it takes time until the detection, so there is a possibility that prompt notification cannot be performed.
[0013]
Therefore, the subject of this invention is providing the emergency call apparatus which can detect an other party's end story reliably.
[0014]
[Means for Solving the Problems]
The present invention employs the following technical configuration in order to achieve the above object. That is, according to the present invention, an emergency call device for making an emergency call to a special number via a relay and a public switched telephone network to a command board that is an emergency call destination, wherein the command board responds to the emergency call. However, the polarity of the line of the emergency call device is not reversed, and after the emergency call, the handset call between the call back telephone connected to the emergency call device via the relay and the command board was carried out, the command system and the call returns phone to both shifts close notification after talking end, in the emergency communication device, means for detecting said post-emergency report, hook the Kokae telephone, the call when detecting the on-hook return telephone, and means for capturing said line and on the relay, and means for detecting a dial tone after the line capture is the call end upon detecting the dial tone And Emergency communication device is obtained, characterized by.
[0015]
[Action]
By changing the method for detecting the other party's end speech from silence detection to other line signal detection, it becomes possible to reliably detect the other party's end speech.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0017]
Referring to FIG. 1, the 119 notification device 10 which is an emergency notification device according to an embodiment of the present invention has an external telephone off-hook detection unit 31 provided between the relay RL1 and the call response telephone 30. Except for this point, it has the same configuration as the 119th notification device 10 ′ shown in FIG.
[0018]
Hereinafter, the operation of the 119th notification device 10 when a fire occurs will be described with reference to FIG.
[0019]
When a fire occurs, the person who recognizes it presses the fire button 20 (step S1). Upon detecting that the fire button 20 has been pressed, the control unit 11 activates the dial sending unit 16 to send the 119th dialed number information Dial (step S2).
[0020]
Thereafter, as shown in FIG. 5, in response to the ringing signal Ring from the fire command board, the call answering telephone 30 goes off-hook, so that the call answering telephone 30 and the 119 fire fighting command board are connected. Then, a handset telephone call is performed (step S3). At this time, the external telephone off-hook detection unit 31 detects off-hook. When the handset call is finished, the call-back response telephone 30 and the fire fighting terminal No. 119 perform on-hook On Hook (step S4). At this time, the external telephone off-hook detector 31 detects on-hook.
[0021]
The operation up to this point is the same as that of the conventional example, except that the external telephone off-hook detection unit 31 detects off-hook.
[0022]
Since the call response telephone 30 is on-hook, the control unit 11 of the 119th notification device 10 determines that the firefighting command board on the 119th side is either continuing or talking. Therefore, the 119th reporting device 10 turns on the relay RL1 (step S5) and performs a line capturing operation. Then, the DT detector 15 detects whether or not there is a dial tone from the PSTN (step S6). When a dial tone is detected by the DT detection unit 15, the control unit 11 determines that the call is in an end state (step S7).
[0023]
On the other hand, if no dial tone is detected by the DT detector 15, that is, if the dial tone is other than the dial tone, the control unit 11 determines that the call is in progress (call continuation) (step S8). In this case, the relay unit RL1 is turned on a plurality of times and the line acquisition operation is periodically repeated, and when the dial tone is detected by the DT detection unit 15, the control unit 11 performs a call termination process (step S9). Thereby, it can transfer to a neighborhood report (step S10).
[0024]
In this way, in the present invention, if the telephone connected to the emergency call device is on-hook after the emergency call, the line capture operation is performed, and when the dial tone is detected, it is determined that the call is ended. Can be detected. Therefore, after the 119th notification, the end of the call can be reliably detected, so that it is possible to reliably and promptly notify the nearby notification destination.
[0025]
Needless to say, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention.
[0026]
【The invention's effect】
As described above, in the present invention, if the telephone connected to the emergency call device is on-hook after the emergency call, the line capture operation is performed, and when the dial tone is detected, it is determined that the call is ended. There is an effect that it is possible to detect the end of the other party. Therefore, for example, after the 119th notification, the end of the call can be detected with certainty, so that there is an advantage that the notification can be made reliably and promptly to a nearby notification destination.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a 119th notification device which is an emergency notification device according to an embodiment of the present invention.
FIG. 2 is a flowchart for explaining the operation of the 119 reporting device shown in FIG. 1 when a fire occurs.
FIG. 3 is a block diagram showing a configuration of a conventional 119 notification device which is an emergency notification device.
FIG. 4 is a flowchart for explaining the operation of the 119 reporting device shown in FIG. 3 when a fire occurs.
FIG. 5 is a flowchart for explaining the operation of the security system including the 119 reporting device shown in FIG. 3 when a fire occurs.
[Explanation of symbols]
10 Emergency call device (119 call device)
DESCRIPTION OF SYMBOLS 11 Control part 12 Memory part 13 Incoming call detection part 14 Voice detection part 15 DT detection part 16 Dial sending part 17 Voice sending part 20 Fire button 30 Call answering telephone 31 External telephone off-hook detection part RL1 Relay

Claims (3)

An emergency call device for making an emergency call to a special number via a relay and a public switched telephone network to a command board which is an emergency call destination, even if the command board responds to the emergency call, the emergency call device The polarity of the line is not reversed, and after the emergency call, the emergency call device makes a handset call between the call back telephone connected via the relay and the command board, and the command board and In the emergency call device, the call-back telephone shifts to a neighbor report after the call ends together ,
Means for detecting the emergency report after on-hook of the Kokae telephone,
When detecting the on-hook of the Kokae telephone, and means for capturing said line and on the relay,
Means for detecting a dial tone after capturing the line;
An emergency call device that determines that the call is over when the dial tone is detected. An emergency call device for making an emergency call to a special number via a relay and a public switched telephone network to a command board which is an emergency call destination, even if the command board responds to the emergency call, the emergency call device The polarity of the line is not reversed, and after the emergency call, the emergency call device makes a handset call between the call back telephone connected via the relay and the command board, and the command board and In the emergency call device that shifts to a neighbor report after the call back phone ends, in the method of detecting the end of the fire command board after the emergency call,
Detecting on-hook of the call back telephone after the emergency call ;
When detecting the on-hook of the Kokae telephone, a step of capturing the line by turning on the relay,
Detecting a dial tone after capturing the line;
A method of detecting an end of an emergency call device, comprising: determining that the end of the call is detected when the dial tone is detected.   The method for detecting an end of an emergency call device according to claim 2, wherein the step of capturing the line and the step of detecting the dial tone are repeated a plurality of times until the dial tone is detected.

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