JP3428867B2 - Terminal adapter - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an emergency call device for an analog line for sending an alert message to a predetermined call destination through a telephone line when an emergency situation such as a fire occurs. The present invention relates to a terminal adapter that enables connection by connecting.

[0002]

2. Description of the Related Art For example, when an emergency such as theft or fire occurs, it is activated by an emergency push button switch or a sensor, and a preset dial number of a destination such as a police station or a fire station is used as a telephone line. There is known an emergency notification device which sends out a notification message stored in advance when the other party of the notification destination responds (see, for example, Japanese Patent Publication No. 63-37549).

At present, this emergency call device is mainly used for analog lines. The operation of the emergency call device for the analog line during the call process is outlined below.

First, when the emergency push button switch is pressed or when a fire is detected by the fire sensor, a notification activation signal is generated. In response to the generation of this activation signal, the emergency notification device captures the line (analog line),
The stored dial numbers "110" and "119" are sent out. Then, after confirming the response from the police station or the fire station, which is the call destination, a predetermined report message stored in the storage unit is sent to the police station or the fire station.

Then, after that, the captured line is once opened to wait for a backlash from the police station or fire station to which the call is to be sent. At this time, since the police station and the fire station hold the analog line that is being connected, the emergency call device only needs to reacquire the line and the line is immediately connected between the two.

[0006] In this state, that is, when the line is open, the police station and the fire station make a reverse communication, and the emergency notification device detects the incoming call and the fire connected to the emergency notification device. A bell such as a telephone rings. If you answer the incoming call with this phone and capture the line, you will be able to talk to the police station or fire station.

Further, the emergency call device reacquires the opened line when an incoming call due to a back contact from a police station or a fire station cannot be detected within a predetermined back contact waiting time, for example, 5 seconds. To do. As described above, this line capturing operation immediately connects to a police station or a fire station, and a call operation such as redialing is unnecessary. Then, the emergency notification device sends a second notification message to the police station or the fire station through the line that has been recaptured to surely convey the emergency situation.

[0008]

By the way, since a high speed data communication is possible as a telephone line, an ISDN line which is a digital line is becoming popular. In the conventional telephone terminal device for analog line, by interposing the terminal adapter with the ISDN line, the ISDN line
It can also be connected to a line.

Therefore, if there is a terminal adapter capable of connecting the above-mentioned emergency call device for analog lines to the ISDN line, the emergency call device for ISDN lines can be connected to the ISDN line without purchasing a new one. Can be used.

However, when the analog emergency call device is connected to the ISDN line via the terminal adapter, there are the following problems.

[0011] Currently, commercially available terminal adapters have an ISD which is obtained when a terminal such as a telephone connected to the analog port dials after capturing a line.
Connect to the N line side according to the specified procedure. Therefore, if the analog terminal seizes the line, the ISDN
Unable to connect to the line.

On the other hand, in the emergency notification device, as described above, the line is temporarily opened after sending the notification message in order to wait for a counter-reception from the police station or fire station. In the case of an analog line, as mentioned above, the line is not completely disconnected, but if the line is reacquired by the emergency call device,
The emergency call device is connected to the police station or fire station without calling.

However, the terminal adapter releases the link on the ISDN line side by opening the line of the emergency notification device. Even in such a case, if an incoming call for reverse communication is received from the police station or fire department, it can be received by the emergency notification device through the terminal adapter, but there is a problem that it is impossible to make a repeat call when there is no reverse communication.

That is, the emergency call device recaptures the line and retransmits the report message, as described above, when the reverse call from the police station or fire station is not received for a predetermined time or longer. At this time, as described above, in the case of an analog line, since the line is recaptured and the line is immediately connected to the call destination, the dial call operation is not necessary and the emergency call device does not send the dial. .

However, in the ISDN line, the line has been completely disconnected due to the line opening operation by the emergency call device. Therefore, if it is left as it is, the line is not connected to the call destination such as the police station or the fire station, and the message Will not be resent.

In addition, a terminal adapter currently on the market outputs a ringing signal (ringer tone) to a telephone or the like connected to an analog port by detecting an incoming call from an ISDN line, The procedure for forming a link on the ISDN side for the first time is taken after the telephone responds by off-hook. For this reason, if the response on the emergency notification device side is delayed when the reverse call is received, another telephone terminal or the like connected to the ISDN line may answer first.

When making a call to "110" or "119" without making a call to the calling address, the called address in the message at the time of reverse communication is the contractor. Since it is a telephone number, there is a risk that it will not arrive at a specific analog port to which the emergency call device is connected, but will arrive at another analog port provided on the terminal adapter.

As described above, the object of the present invention is to provide a terminal adapter which can solve the problems when an emergency call device for analog lines is connected to an ISDN line.

[0019]

In order to solve the above-mentioned problems, a terminal adapter according to the invention of claim 1 captures a line in accordance with a start signal generated in an emergency and sends out a preset dial number of a report destination. after the, it sends a notification message, then captured by opening the line waiting for incoming call by reverse signal from the report destination, if the incoming call is not detected by the Gyakushin again, and captures a line At least an analog port to which the emergency call device for analog lines having a function of transmitting the report message is connected,
A terminal adapter for connecting the emergency notification device to an ISDN line, the line capture detecting means for detecting line capture of the emergency notification device; and after the line capture is detected by the line capture detecting means, Means for identifying the dial number of the notification destination sent from the emergency notification device and calling the notification destination through the ISDN line, and storing the dial number of the notification destination sent from the emergency notification device Storage means and reverse call detection means for detecting an incoming call due to a reverse call from the callee by detecting the calling number in the incoming call information from the ISDN line.
After sending the notification message from the emergency notification device, detecting the line open of the emergency notification device by the line capture detection means, then without detecting the incoming call from the report destination in the reverse communication detection means, Again, when the line capture of the emergency notification device is detected, means for automatically making a call through the ISDN line using the dial number of the callee stored in the storage means is provided. Characterize.

The terminal adapter according to a second aspect of the present invention is characterized in that, in the first aspect, the emergency notification device is provided with a during-report detecting means for detecting an during-report output signal output during activation of the report.

Further, in the terminal adapter of the invention of claim 3, according to claim 1 or 2, the IS
When there is an incoming call through the DN line, a calling signal generating means for sending a calling signal to the emergency notification device connected to the analog port, and an incoming call from the notification destination by the reverse communication detecting means. When the IS is detected, a response signal to the incoming call is sent to the IS without waiting for a response from the emergency notification device side to the call signal from the call signal generating means.
Advance response means for sending to the DN line side.

Further, in the terminal adapter of the invention of claim 4, in the terminal adapter of claim 3, to the notification destination connected by the response signal transmission to the ISDN line side by the advance response means. On the other hand, a pseudo ringback tone is transmitted until the response from the emergency notification device side.

Furthermore, in the terminal adapter of the invention of claim 5, in the terminal adapter of claim 3, in addition to the analog port for the emergency call device, an analog port for a normal analog telephone terminal is provided. After sending the notification message from the emergency notification device,
When the line detection of the emergency call device is detected by the line capture detection unit, and then the incoming call from the callee is detected by the reverse response detection unit, the notification output detection unit detects that the call is in progress. The calling signal is transmitted only through the analog port for the emergency notification device.

[0024]

In the terminal adapter of the present invention having the above-mentioned structure, when the emergency call device is activated and the line is seized, it is detected and the dial number of the callee sent subsequently is identified. Then, a call is made to the callee. At this time, this telephone number information is
It is stored in the storage means.

When the ISDN line is connected to the report destination, the report message from the emergency report device is sent to the report destination through the terminal adapter and the ISDN line. The emergency notification device, after sending this notification message,
In order to wait for the reverse communication, the line is temporarily released.
As a result, the terminal adapter will have an ISDN
Disconnect the line.

After that, if there is a reverse call from the callee, it is transmitted to the emergency call device side through the terminal adapter, and, for example, by an emergency telephone connected to the emergency call device, there is no analog line. Similarly, a mutual call is made with the callee.

However, when there is no back communication from the callee for a predetermined period of time or longer, the emergency call device reacquires the line and performs an operation of sending a report message. At this time, the emergency call device does not send the outgoing call, but the terminal adapter uses the stored dial number to
The dial call operation is performed, the line with the report destination is secured, and the report message is retransmitted.

Therefore, even if the ISDN line is used, the alarm message can be retransmitted from the emergency call device for the analog line without any trouble.

According to the second aspect of the present invention, when the emergency notification device is in an emergency notification operation, an emergency notification output signal indicating this is sent to the terminal adapter. The terminal adapter thereby identifies that the emergency call device connected to the analog port is in an emergency call operation. Therefore,
Even if the terminal adapter is provided with another port for connecting an analog line terminal such as an ordinary analog telephone, it is possible to easily perform control such as prioritizing the emergency call operation.

Further, the terminal adapter according to the third aspect of the present invention automatically responds to the incoming call of the opposite communication during the reporting operation, without waiting for the response of the emergency notification device side. . When a plurality of terminals are connected to the ISDN line, the incoming call of the reverse call is valid for the plurality of terminals, but the immediate response of the terminal adapter according to the invention of claim 3 , The ringing of the incoming call of those terminals almost does not occur, and an incorrect response can be prevented.

According to the terminal adapter of the fourth aspect of the present invention, as in the third aspect, an automatic response is made to the incoming call of the reverse call during the notification operation without waiting for the response of the emergency notification device side. When this happens, a pseudo ringback tone is sent until there is an actual response from the emergency notification device. Therefore,
At the police station or fire station side, the unnaturalness due to the ringback tone not returning from the time of prior response to the response from the actual emergency call device side is eliminated.

Further, in the terminal adapter of the fifth aspect of the invention, when the output signal during notification is detected, it is detected that the emergency notification device is operating, and the reverse response detecting means detects the incoming call from the destination. In that case, the call signal is transmitted only through the analog port for the emergency notification device. Therefore, even if the terminal adapter has a port to which a telephone terminal other than the emergency call device is connected, the ringing signal at the time of incoming reverse communication is not sent to the terminal connected to the other port. So the bell does not ring and no false response occurs.

[0033]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a terminal adapter having an analog port for an emergency call device according to the present invention will be described below with reference to the drawings.

FIG. 2 shows a connection form of a terminal adapter and an emergency notification device to the ISDN line. That is, the ISDN line 1 is connected to the subscriber premises network 3 through the DSU (line terminating device) 2.

The subscriber premises network 3 is connected to the emergency notification device 4 and an analog line terminal such as a normal telephone terminal 5 through the terminal adapter 10 of this embodiment, and a digital line terminal 6 and the like. 7
Can be connected.

In this case, the emergency call device 4 has a function of generating an output signal during a call during the emergency call operation, and the terminal 4a to be connected to the analog telephone line and the emergency call operation. It is provided with a terminal 4b for outputting the notification-in-progress signal and a terminal 4c for connecting an emergency telephone 8 for receiving a reverse communication and having a call with a notification destination.

The terminal 4a is connected to the emergency notification device analog port 10a of the terminal adapter 10. Further, the terminal 4b is connected to the terminal 10b of the terminal adapter 10, and the output signal during notification from the emergency notification device 4 is input to the terminal adapter 10 through this terminal 10b.

The terminal adapter 10 also includes an analog port 10a for an emergency call device and an analog port 10c for an ordinary telephone terminal for an analog line,
A normal analog telephone terminal 5 such as a telephone or a facsimile machine is connected to the analog port 10c.

In this embodiment, the emergency notification device 4 is
In response to the generation of the start signal according to the occurrence of the emergency situation, FIG.
The operation as shown in the flowchart of FIG.

That is, the emergency notification device 4 monitors the generation of the activation signal as a result of monitoring of the emergency button and the fire sensor. When the generation of the activation signal is detected, the flowchart of FIG. 3 is executed.

First, in step 101, a line capturing operation is performed. Next, in step 102, a dial tone is detected by the tone detection circuit 21 in the captured line to detect whether or not the exchange side is ready to accept the dial. Alternatively, after the line is captured in this step 102, it waits for 3 seconds or more.

Then, by detecting the dial tone, etc.,
After confirming that the exchange side is ready to accept the dial, the preset destination, that is, "110
No. ”and“ 119 ”are automatically dialed. Next, in step 104, it is determined whether or not there is a response from the callee depending on whether or not a response voice from the callee is detected.
If there is no response from the callee, the process proceeds to step 105 to confirm that the other party has not responded. This partner non-response is to detect a partner non-response for a certain period of time or longer.

When it is confirmed in step 105 that the other party has not responded, the process proceeds to step 106, the line is once opened, and the next step 107 waits for 4 seconds or more. This time of 4 seconds or more is the time for completely releasing the line. When it is detected in step 107 that the time of 4 seconds or more has elapsed, the process returns to step 101 and the reporting operation is performed again.

When the response of the other party is confirmed in step 104, the process proceeds to step 108, and the notification message previously stored in the memory of the emergency notification device is sent to the notification destination. Then, after sending the notification message, step 109
Then, the line which has been captured is once released, and then the reverse signal is waited for 5 seconds. That is, step 110
Then, it is determined whether or not the reverse communication is detected (the reverse incoming call is detected). When the reverse communication is not detected, it is determined in step 111 that 5 seconds have elapsed, and 5 seconds have elapsed in the state of waiting for the reverse communication. If not, the process returns to step 110 to continue waiting for reverse communication.

Then, when it is determined in the next step 111 that the reverse communication cannot be detected for 5 seconds, the process proceeds to step 112, the opened line is captured, the process returns to step 108, and the notification message is sent. Resend. As described above, at this time, since the 110 and 119 call destinations hold the line, dial transmission to this call destination is not performed.

When reverse communication is detected in step 110, the process proceeds to step 113, the bell of the emergency telephone 8 connected to the emergency notification device is rung, and the next step 1
At 14 waits for an off-hook response at the emergency telephone 8. Then, when the off-hook of the emergency telephone 8 is detected, the process proceeds to step 115, mutual communication is performed with the report destination, and the on-hook confirmation of the emergency telephone 8 is confirmed at step 116, and the notification processing ends.

Next, the terminal adapter 10 of this embodiment will be described. The terminal adapter 10 of this embodiment is configured as shown in FIG.

The terminal adapter 10 of this embodiment
Are processing circuits 100 and 200 corresponding to the analog ports for the analog ports 10a and 10c, respectively.
Equipped with. These circuits 100 and 200 and DSU2
An ISDN interface 11 is provided between the connection terminals R and T. ISDN interface 11
Is for performing interface processing with the ISDN line 1 connected via the DSU 2, and a control circuit 2 described later.
5 acquires and analyzes the data at the time of the incoming call through this interface 11, detects the calling number of the other party, or sends the information of the calling number at the time of the calling in addition to the "SET UP" message. .

Since the analog port compatible processing circuits 100 and 200 have almost the same circuit configuration, in FIG.
Only the analog port-compatible processing circuit 100 for an emergency notification device is shown, and details of the circuit 200 are omitted.

In the analog port processing circuit 100 of FIG. 1, 12 is a codec circuit, 13 and 14 are amplifiers, 15 is a 2-wire / 4-wire conversion circuit, 16 is a power supply circuit, and 17
Is a polarity reversing circuit, 18 is a line capture detection circuit, and 19 is PB.
A receiver, 20 is a line capture monitoring circuit, 21 is a ringing signal generation circuit, 22 is a tone generation circuit, 23 is a notification detection circuit, 24 is a memory, 25 is a control circuit, and AR is a relay.

The switch contact a between the power supply circuit 16 and the polarity reversing circuit 17 is the contact of the relay AR. This relay AR is turned on when the terminal adapter 10 detects a reverse communication from the communication destination while the emergency communication device 4 opens the line after transmitting the notification message and is in the reverse communication standby state. a is switched from the power feeding circuit 16 side to the line capture monitoring circuit 20 side.

Under the control of the control circuit 25, the codec circuit 12 codes (encodes) data to be sent to the ISDN line, and decodes (receives) data received from the ISDN line.

The power supply circuit 16 supplies a DC voltage to the emergency notification device 4 connected to the analog port 10a. The polarity reversing circuit 17 inverts the polarity of the DC voltage when there is a response from the other party through the ISDN line 1 in response to a call from the analog line terminal, and the analog port 10
It is for transmitting the other party's response to the analog line telephone terminal connected to a.

The line capture detection circuit 18 is used by the emergency notification device 4
In order to detect the line capture when the notification message is issued, the detection output is output to the control circuit 25. P
The B receiver 19 is for identifying dial information (telephone number) when there is a dial transmission from the emergency notification device 4, and outputs the identified dial information to the control circuit 25.

The line capturing / monitoring circuit 20 is used by the emergency notification device 4
However, the purpose is to monitor the line capture by the response from the callee by the reverse communication. The detection output of the line capture monitoring circuit 20 is supplied to the control circuit 25.

The call signal generating circuit 21 is
When there is a back contact from the callee, 16
It is for transmitting a call signal of Hz.

The tone generation circuit 22 generates a pseudo ringback tone and other tone signals. As will be described later, when there is a back contact from the contact while waiting for a back contact,
The terminal adapter 10 of this embodiment makes a response without waiting for a response by the off-hook in the emergency telephone 8 connected to the emergency notification device 4, and makes a response to the digital line terminal connected to the network 3 or the like. At the terminal for analog line connected to the terminal adapter, the ringing due to the incoming call due to the reverse communication is prevented as much as possible.

However, it may take some time from the response from the terminal adapter 10 to the actual response from the off-hook of the emergency telephone. Therefore, in this embodiment, the pseudo ringback tone is generated from the tone generating circuit 22 until the response by the off-hook of the emergency telephone 8 is actually sent, and the emergency telephone 8 is actually notified to the call destination. This pseudo-ringback tone is sent until there is a response to prevent an unnatural state.

The in-report detecting circuit 23 is for receiving and detecting the in-report output signal output from the emergency reporting device 4 during the reporting operation through the terminal 10b, and supplying the detected output to the control circuit 25. Based on this detection output, the control circuit 25 detects that the emergency notification device 4 is performing an emergency notification operation.

The memory 24 stores the dial number of the report destination, which is necessary when the line is re-acquired and the report message is sent again after the reverse communication standby time has elapsed. The control circuit 25 stores the dial information sent from the emergency notification device 4 at the time of the first call, that is, the dial number of the callee in the memory 24.

Next, the notification operation using the ISDN line from the emergency notification device 4 via the above-mentioned terminal adapter 10 will be described with reference to the sequence diagrams of FIGS. 4 and 5.

FIG. 4 shows an operation sequence in the case where a report message is issued from the emergency report device 4 and there is a back communication immediately from the report destination.

That is, as described above, when the activation of the notification based on the emergency button or the fire sensor occurs, the emergency notification device 4 outputs the during-report output signal from the terminal 4b and performs the line capturing operation. In the terminal adapter 10, the notification output signal which is input through the terminal 10b is detected by the notification detection circuit 23, and the detection output is detected by the control circuit 2.
Send to 5. As a result, the control circuit 25 of the terminal adapter 10 recognizes that the emergency notification device 4 has entered the notification operation.

In the terminal adapter 10, the line capture operation of the emergency notification device 4 is detected by the line capture detection circuit 18, and the detection output is sent to the control circuit 25. Control circuit 2
Reference numeral 5 controls the tone generation circuit 22 in accordance with the line capture detection output to generate a dial tone signal. This dial tone signal is supplied to the emergency notification device 4 through the amplifier 13-2 wire / 4 wire conversion circuit 15-power supply circuit 16-polarity inversion circuit 17-analog port 10a.

After detecting this dial tone signal, the emergency call device 4 sends a dial number to the call destination. In the terminal adapter 10, this dial number information is P
It is identified by the B receiver 19 and sent to the control circuit 10.
The control circuit 10 stores this dial number information in the memory 24 and, based on this dial number information, the IS.
A call is made to the DN line 1. That is, "SET
Send the "UP" message to line 1.

Then, the ISDN exchange side calls the report destination, sends a "CALL PROC" message, and then sends an "ALERT" message to the terminal adapter 10. Upon receiving this message, the control circuit 25 of the terminal adapter 10 controls the tone generation circuit 22 to generate a ringback tone,
This is sent to the emergency notification device 4.

When the callee responds, the ISDN exchange side sends a "CON" message, which is a line connection response message.
Since the "N" message is sent, the control circuit 25 of the terminal adapter 10 detects this and controls the tone generating circuit 22 to stop the generation of the ringback tone.

The emergency notification device 4 sends a notification message after detecting the response voice from the notification destination. This notification message is encoded by the codec circuit 12 of the terminal adapter 10 and sent to the ISDN line 1 and sent to the notification destination.

After that, the emergency notification device 4 is in a state of waiting for the reverse communication, and temporarily opens the line. Terminal adapter 1
At 0, this line open detection is detected by the line capture detection circuit 18, and the detection output is supplied to the control circuit 25. The control circuit 25 recognizes the reverse communication standby state of the emergency notification device 4 based on this detection output and the notification output signal.

Further, in response to the detection output of the line open, the control circuit 25 issues a line open "DISC" message to the IS.
It is sent to the DN exchange side. After that, the "REL" message and the "REL COMP" message are exchanged between the terminal adapter 10 and the ISDN exchange side, and the line is opened.

After that, when the callee performs a reverse call operation, the terminal adapter 10 receives the "SET UP" message at the time of the call from the ISDN exchange side.
At this time, the control circuit 25 detects whether or not the calling party is the “110” or “119” of the report destination based on the calling number included in the “SET UP” message.

In this case, the incoming call due to the reverse communication may be detected by detecting either the special number "110" or "119", but the notification destination to which the notification message is sent is detected. In order to reliably detect an incoming call due to a reverse call from the callee, in this embodiment, by detecting a match with the dial number of the callee stored in the memory 24, the call from the callee by the reverse call is detected. Detect a call.

Control circuit 25 of terminal adapter 10
Turns on the relay RA when it detects an incoming call due to the reverse communication from the callee. Then, the contact point a is switched from the power feeding circuit 16 side to the line capture monitoring circuit 20 side.

Thereafter, when the control circuit 25 confirms that the emergency notification device 4 is in the middle of a notification by the detection output of the notification-in-progress detection circuit 23, the control circuit 25 generates a call signal for the emergency notification circuit 100 for the analog port 10a. A call signal is generated only from the circuit 21 and sent to the emergency notification device 4 through the line capture monitoring circuit 20 and the polarity reversing circuit 17. This allows
Only the bell of the emergency telephone 8 connected to the emergency notification device 4 rings, and the bell of the analog line telephone terminal 5 connected to the other analog port 10c of the terminal adapter 10 does not ring.

Therefore, it is possible that the analog call telephone terminal 5 will be answered before the emergency call 8 is answered off-hook by being transmitted to the analog telephone terminal 5 as a reverse call. Absent.

At the same time, the control circuit 25 causes the "SET
When the calling party included in the “UP” message detects that the calling party is the destination “110” or “119”, the response is made without waiting for the off-hook response of the emergency telephone 8. A "CONN" message, which is a message for line connection, is sent to respond to an incoming call from the callee, which is a reverse call. Then, the control circuit 25
Controls the tone generation circuit 22 to generate a pseudo ringback tone, which is sent to the destination of the reverse communication.

After that, when the emergency telephone 8 responds by off-hook, the line capture monitoring circuit 20 of the terminal adapter 10 detects the line capture by this response. Upon receiving the line capture detection output from the line capture monitor circuit 20, the control circuit 25 controls the tone generation circuit 22 to stop the generation of the pseudo ringback tone, and also turns off the relay RA to make the contact a. The power supply circuit 16
Control to return to the side.

As a result, the emergency telephone 8 and the callee are in a mutual call state through the ISDN line 1.

Thereafter, when the emergency telephone 8 makes an on-hook operation as a call ending operation, the message "DISC""REL""RELCOMP" for disconnecting the line is issued.
Is exchanged and the line is disconnected. With that, the reporting operation is completed.

Next, a description will be given of an operation sequence in the case where there is no counter-reverse communication from the police station or the fire department, which is the call destination, even after the reverse-communication standby time, for example, 5 seconds, has passed, with reference to FIG. To do. In the sequence of FIG. 5, the sequence from the message activation to the message transmission of FIG. 4 is exactly the same, and is therefore omitted.

In this case, since the reverse call waiting time of 5 seconds has elapsed after the line was opened for waiting for the reverse call, there was no back contact from the callee, so the emergency call device 4
Then, the line capturing operation is performed. Then, in the terminal adapter 10, the line capture monitoring circuit 20 detects this line capture, and the detection output is supplied to the control circuit 25.

The control circuit 25 uses the line capture monitoring circuit 2
When the line capture detection output from 0 is received, the dial number information of the callee stored in the memory 24 is read out, and based on this, the telephone number indicating the callee is included as the calling operation to the ISDN line 1. Send a “SET UP” message to line 1.

On the other hand, in the same manner as described above, when there is a response at the report destination, the message "CONN" is received, and the ISDN line is connected. The emergency notification device 4 sends a notification message through this connected ISDN line. As a result, the notification message is sent again to the notification destination through the ISDN line.

Then, the emergency notification device 4 again enters the state of waiting for the reverse communication and opens the line. After that, if there is reverse communication, the sequence is exactly the same as the sequence described with reference to FIG.

When there is no back communication within the back contact waiting time, the emergency notification device 4 again sends out a notification message, and the operation sequence at that time is the same as the sequence described with reference to FIG. In the same manner, the telephone number of the callee stored in the memory 24 of the terminal adapter 10 is used to establish a line connection with the callee and execute the call.

In the above embodiment, the terminal adapter is not dedicated to the emergency notification device, but has a port that allows connection of other general analog line telephone terminals. Although it was necessary to acquire the output signal during notification from the emergency notification device and detect the operation during notification, it is not necessary to monitor the output signal during notification if the terminal adapter is configured only for the emergency notification device.

[0087]

As described above, according to the terminal adapter of the present invention, an emergency call device for an analog line can be used to make an emergency call through an ISDN line without causing the problems described at the beginning. You can do it.

[Brief description of drawings]

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

FIG. 2 is a diagram for explaining a usage mode of the terminal adapter according to the present invention.

FIG. 3 is a flowchart showing an example of the operation of the emergency notification device.

FIG. 4 is a sequence diagram for explaining the flow of emergency notification control processing using the terminal adapter according to the present invention.

FIG. 5 is a sequence diagram for explaining the flow of emergency notification control processing using the terminal adapter according to the present invention.

[Explanation of symbols]

1 ISDN line 4 Emergency call device 8 Emergency telephone 10 Terminal adapter 10a Analog port 10b for emergency call device Input terminal 10c of the output signal during a call Analog port 11 for general analog line telephone terminal ISDN interface 16 Power supply circuit 18 line Capture detection circuit 19 PB receiver (dial identification circuit) 20 Line capture monitoring circuit 21 Ringing signal generation circuit 22 Tone generation circuit 23 In-call detection circuit 24 Memory 25 for storing telephone number Control circuit RA Relay

Claims (5)

(57) [Claims] 1. A line is captured according to a start signal generated in an emergency, a dial number of a preset report destination is transmitted, a report message is transmitted, and then the captured line is opened to report the destination. waiting an incoming call by reverse signal from, if the incoming call is not detected by the <br/> Gyakushin again, emergency communication device connecting analog line having a function of capturing a line delivering the notification message A terminal adapter for connecting the emergency call device to an ISDN line, the line capture detecting means detecting line capture of the emergency call device; A hand for identifying the dial number of the callee sent from the emergency call device after the capture is detected and making a call to the callee through the ISDN line. And a storage means for storing the dial number of the callee sent from the emergency call device, and a reverse communication from the callee by detecting the calling number in the incoming call information from the ISDN line. Reverse communication detecting means for detecting an incoming call by the emergency notification device, after sending the notification message from the emergency notification device, the line capture detection means detects the line open of the emergency notification device, and then the reverse communication detection means When the line capture of the emergency notification device is detected again without detecting the incoming call from the callee, the dialing number of the callee stored in the storage means is used to make a call through the ISDN line. A terminal adapter characterized by comprising means for automatically performing. 2. The terminal adapter according to claim 1, further comprising an in-progress detection means for detecting an in-progress output signal output from the emergency alert device during activation of the alert. 3. A call signal generation means for sending a call signal to the emergency notification device connected to the analog port when an incoming call is received through the ISDN line, and the reverse communication detection means for the call signal generation means. When an incoming call from the callee is detected, a response signal to the incoming call is sent to the ISDN line side without waiting for a response from the emergency notification device side to the ringing signal from the calling signal generating means. 3. A terminal adapter according to claim 1, further comprising a response unit. 4. The terminal adapter according to claim 3, wherein the emergency response device side responds to the call destination connected by the response signal transmission to the ISDN line side by the advance response means. A terminal adapter characterized by transmitting a pseudo ringback tone during the period. 5. The terminal adapter according to claim 3, further comprising an analog port for a normal analog telephone terminal, in addition to the analog port for the emergency notification device, after sending a notification message from the emergency notification device. When the line capture detection means detects the line open of the emergency notification device, and then the incoming call from the callee is detected by the reverse connection detection means, the notification output detection means detects that the call is in progress. A terminal adapter for transmitting the call signal only through an analog port for the emergency notification device.