JPH1169005A - Terminal adapter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal adapter which can solve problems in connecting an emergency message device for analog line to an ISDN line. SOLUTION: An analog port, to which the emergency message device for analog line is connected, is provided. After the line capture of the emergency message device is detected by a line capture detecting means 18, the telephone number of the destination to report sent from the emergency message device is identified, this telephone number is stored in a memory 24, and a means for originating a call through the ISDN line to the destination to report is provided. By detecting a call originating number of a terminated call from the ISDN line, the terminated call for inverse communication from the destination to report is detected. When a line is captured for sending an alarm message again without detecting the inverse communication after the emergency message device releases the line for inverse communication, a means is provided for automatically originating a call through the ISDN line to the destination to report while using the telephone number stored in the memory 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an analog line emergency report device for transmitting a report message to a predetermined report destination via a telephone line in the event of an emergency such as a fire. And a terminal adapter that enables connection.

[0002]

2. Description of the Related Art For example, when an emergency such as theft or a fire occurs, the emergency dial is activated by an emergency push button switch or a sensor, and a preset dial number of a report destination such as a police station or a fire department is transmitted to a telephone line. An emergency report device is known which transmits a pre-stored report message when the other party responds by transmitting the report message (see, for example, Japanese Patent Publication No. 63-37549).

[0003] At present, this emergency reporting device is mainly used for analog lines. The outline of the operation at the time of the notification processing of the analog line emergency notification device is as follows.

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

[0005] Thereafter, the line once captured is once released, and the system waits for a backlash from the police station or the fire station, which is the report destination. At this time, since the police station and the fire department hold the connected analog line, the line is immediately connected between the two just by the emergency call device re-capturing the line.

[0006] In this state, that is, in a state where the line is open, when the police station or the fire station performs reverse communication, the emergency notification device detects the incoming call and the fire connected to the emergency notification device. The bell of the telephone rings. If the telephone responds to the incoming call and seizes the line, it is possible to make an interactive call with a police station or a fire department.

[0007] Further, the emergency notification device re-captures the line that has been opened when an incoming call due to reverse communication from a police station or a fire station cannot be detected within a predetermined reverse communication waiting time, for example, 5 seconds. I do. As described above, by this line capturing operation, the user is immediately connected to the police station or the fire department, and the calling operation such as dialing again is unnecessary. Then, the emergency notification device sends a second notification message to the police station or the fire department via the re-captured line, so that the emergency situation is reliably transmitted.

[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 widespread. A conventional telephone terminal device for an analog line employs a terminal adapter interposed between the terminal terminal and the ISDN line.
It can also be connected to a line.

Therefore, if there is a terminal adapter that can connect the above-described emergency call device for analog lines to the ISDN line, it is possible to connect to the ISDN line without purchasing a new emergency call device for ISDN lines. Can be used.

[0010] However, the following problem arises when the analog line emergency reporting device is connected to the ISDN line via the terminal adapter.

[0011] At present, generally available terminal adapters are provided with a terminal such as a telephone connected to the analog port, which dials after capturing a line, thereby making an ISD.
A connection is made to the N line according to a specified procedure. Therefore, if the analog terminal merely captures the line, the ISDN
Unable to connect to line.

On the other hand, in the emergency notification device, as described above, the line is temporarily opened after the transmission of the notification message in order to wait for the back communication from the police station or the fire station. In the case of an analog line, as described above, the line is not completely disconnected.
The emergency call device is connected to the police station or the fire department without performing a calling operation.

[0013] 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 a reverse call is received from a police station or a fire department, it can be received by the emergency notification device through the terminal adapter, but there is a problem that it is not possible to make a second call when there is no reverse communication.

That is, when there is no incoming call from the police station or the fire department for the reverse communication for a predetermined time or more, the emergency notification device re-acquires the line and transmits the notification message again as described above. At this time, as described above, in the case of the analog line, since the line is immediately connected to the report destination by re-acquisition of the line, the dial calling operation is unnecessary, and the dial transmission from the emergency report device is not performed. .

However, in the ISDN line, the line has been completely disconnected due to the line opening operation by the emergency reporting device, so that the line is not connected to a report destination such as a police station or a fire department, and a report message is not generated. Will not be resent.

Further, currently available terminal adapters detect an incoming call from an ISDN line and output a ringing signal (ringer sound) to a telephone or the like connected to an analog port. A procedure for forming a link on the ISDN side for the first time after the telephone responds by off-hook is taken. For this reason, if the response on the emergency reporting device side is delayed at the time of receiving the reverse communication, there is a possibility that another telephone terminal or the like connected to the ISDN line may receive the response first.

Also, when making a call to the "110" or "119" without sending the calling address to the report destination, the destination address in the message at the time of the reverse communication becomes the contractor. Since the telephone number is used, there is a possibility that the call does not arrive at a specific analog port to which the emergency notification device is connected but arrives at another analog port provided on the terminal adapter.

It is an object of the present invention to provide a terminal adapter which can solve the problem when connecting an emergency call device for an analog line to an ISDN line as described above.

[0019]

According to a first aspect of the present invention, there is provided a terminal adapter for capturing a line in response to a start signal generated in an emergency and transmitting a preset dial number of a report destination. And then send a report message, then release the captured line and wait for reverse communication from the report destination. If reverse communication cannot be detected, recapture the line and send the report message again. At least an analog port to which an analog line emergency reporting device is connected.
A terminal adapter for connecting to a DN line, comprising: line capture detection means for detecting a line capture of the emergency notification device; and transmission from the emergency notification device after the line capture is detected by the line capture detection device. Means for identifying the dial number of the report destination to be made, and making a call to the report destination via the ISDN line; storage means for storing the dial number of the report destination sent from the emergency report device; Incoming call information from the ISDN line, by detecting a calling number, reverse communication detecting means for detecting an incoming call due to reverse communication from the report destination, and after transmitting a report message from the emergency report device, The line release detection of the emergency reporting device is detected by the line capture detection means, and then, without detecting the incoming call from the report destination by the reverse communication detection means, again,
Means for automatically making a call through the ISDN line using the dial number of the notification destination stored in the storage means when detecting the line capture of the emergency notification device;
It is characterized by having.

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

According to a third aspect of the present invention, there is provided the terminal adapter according to the first or second aspect.
A call signal generating means for transmitting a call signal to the emergency notification device connected to the analog port when a call is received via a DN line; Is detected, the response signal to the incoming call is sent to the IS without waiting for a response from the emergency notification device to the call signal from the call signal generating means.
And a pre-response means for transmitting to the DN line side.

In the terminal adapter according to a fourth aspect of the present invention, in the terminal adapter according to the third aspect, the notification destination connected by transmitting a response signal to the ISDN line side by the advance response means. On the other hand, a pseudo ringback tone is transmitted until a response from the emergency notification device side.

In the terminal adapter according to a fifth aspect of the present invention, the terminal adapter according to the third aspect further comprises an analog port for a normal analog telephone terminal in addition to the analog port for the emergency call device. After sending the notification message from the emergency notification device,
When the line release of the emergency notification device is detected by the line capture detection means, and thereafter, when the incoming call from the notification destination is detected by the reverse transmission detection means, the notification during detection is detected by the notification output detection means. The paging signal is transmitted only through the analog port for the emergency notification device.

[0024]

In the terminal adapter according to the first aspect of the present invention, when the emergency reporting device is activated and seizes the line, it detects it and identifies the dial number of the report destination that is subsequently transmitted. And make a call to the destination. At this time, this telephone number information is
Store in 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 via the terminal adapter and the ISDN line. After sending this notification message, the emergency notification device
In order to wait for the reverse communication, the line is once released.
This allows the terminal adapter to communicate with the ISDN
Disconnect the line.

Thereafter, if there is an incoming call of the reverse communication from the report destination, it is transmitted to the emergency report device through the terminal adapter, and, for example, by an emergency telephone connected to the emergency report device, it is completely different from the case of the analog line. Similarly, a mutual call with the report destination is performed.

However, when there is no back communication from the report destination for a predetermined time or more, the emergency report device re-acquires the line and performs an operation of transmitting a report message. At this time, the emergency notification device does not send outgoing dial, but the terminal adapter uses the stored dial number to
A dial call operation is performed to secure a line with a report destination, and re-transmit a report message.

Therefore, even if an ISDN line is used, a report message can be retransmitted from the analog line emergency report device without any trouble.

According to the second aspect of the present invention, while the emergency notification device is in the operation of an emergency notification, a notification output signal indicating the notification is sent to the terminal adapter. The terminal adapter thereby identifies that the emergency reporting device connected to the analog port is performing an emergency reporting operation. Therefore,
Even if the terminal adapter is provided with another port for connecting an analog line terminal such as a normal analog telephone, control such as giving priority to an emergency notification operation can be easily performed.

Further, the terminal adapter according to the third aspect of the present invention automatically responds to the incoming call without waiting for a response from the emergency notification device side, when an incoming call is received during the reporting operation. . When a plurality of terminals are connected to the ISDN line, the incoming call of the reverse communication is also effective for the plurality of terminals. The ringing of the ringing of the plurality of terminals hardly occurs, and an erroneous 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 to an incoming call of a reverse communication during a report operation is performed without waiting for a response from the emergency report device. Then, a pseudo ringback tone is sent until there is a response on the actual emergency call device side. Therefore,
At the police station or fire department, the unnaturalness due to the ringback tone not returning between the prior response and the actual response at the emergency reporting device is eliminated.

Furthermore, the terminal adapter according to the fifth aspect of the present invention detects that the emergency report device is operating when the output signal during report is detected, and detects the incoming call from the report destination by the reverse report detecting means. In this case, a 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, a ringing signal at the time of the reception of the reverse communication is not transmitted to the terminal connected to the other port. Therefore, the bell does not ring and no false response occurs.

[0033]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 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 mode 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.

An emergency notification device 4 and an analog line terminal, for example, a normal telephone terminal 5 are connected to the subscriber premises network 3 through the terminal adapter 10 of this embodiment. 7
Can be connected.

In this case, the emergency notification device 4 has a function of generating a notification output signal when performing an emergency notification operation, and includes a terminal 4a to be connected to an analog telephone line, It has a terminal 4b for outputting the signal during the notification operation, and a terminal 4c for connecting the emergency telephone 8 for receiving the inverse communication and communicating with the notification destination.

Then, the terminal 4a is connected to the emergency notification device analog port 10a of the terminal adapter 10. 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 10c for a normal telephone terminal for an analog line, in addition to the analog port 10a for an emergency notification device.
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
In response to the occurrence of a start signal in response to the occurrence of an emergency, FIG.
The operation as shown in the flowchart of FIG.

That is, the emergency notification device 4 monitors the generation of a start signal as a result of monitoring the emergency button, the fire sensor, and the like. Then, 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, at step 102, the tone detection circuit 21 detects a dial tone in the captured line, and detects whether or not the exchange is ready to accept a dial. Alternatively, it waits for a lapse of 3 seconds or more after the line is captured in step 102.

Then, by dial tone detection, etc.,
After confirming that the exchange side is ready to accept a dial, the preset destination, ie, “110”
Automatic dialing is performed for "number" or "119". Next, the process proceeds to step 104, where it is determined whether or not there is a response from the report destination based on whether or not a response voice from the report destination has been detected.
If there is no response from the call destination, the process proceeds to step 105, and the non-response of the partner is confirmed. This partner non-response is, for example, to detect a partner non-response for a certain time or more.

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

When the response of the other party is confirmed in step 104, the process proceeds to step 108, where a report message stored in the memory of the emergency report device is sent to the report destination. Then, after sending the notification message, step 109
To release the line once captured, and then wait for a return signal for 5 seconds. That is, step 110
Then, it is determined whether or not reverse communication has been detected (incoming call of reverse communication has been detected). If no reverse communication has been detected, the elapse of 5 seconds is determined in step 111. If not, the process returns to step 110 to continue waiting for the reverse communication.

If it is determined in the next step 111 that back-talk has not been detected for 5 seconds, the process proceeds to step 112, where the line that has been released is captured, and the process returns to step 108 to send a notification message. Is resent. As described above, at this time, since the report destination of 110 or 119 holds the line, dial transmission to this report destination is not performed.

When the reverse communication is detected in step 110, the process proceeds to step 113, in which the bell of the emergency telephone 8 connected to the emergency notification device is sounded, and the next step 1 is executed.
At 14, the system waits for an off-hook response of the emergency telephone 8. Then, when the off-hook of the emergency telephone 8 is detected, the process proceeds to step 115 to perform an intercommunication with the report destination.

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 analog port corresponding processing circuits 100 and 200 for analog ports 10a and 10c, respectively.
Is provided. These circuits 100 and 200 and DSU2
An ISDN interface 11 is provided between the connection terminals R and T. ISDN interface 11
Performs an interface process with the ISDN line 1 connected via the DSU 2, and a control circuit 2 to be described later.
5 obtains and analyzes data at the time of incoming call through the interface 11, detects, for example, the calling number of the other party, and sends out the calling number information in addition to the "SET UP" message at the time of calling. .

The analog port corresponding processing circuits 100 and 200 have substantially the same circuit configuration.
Only the processing circuit 100 corresponding to the analog port for the emergency notification device is shown, and the 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,
Is a polarity inversion circuit, 18 is a line capture detection circuit, 19 is a PB
A receiver, 20 is a line capture monitoring circuit, 21 is a call 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.

A switch contact a between the power supply circuit 16 and the polarity inversion circuit 17 is a contact of the relay AR. This relay AR is turned on when the terminal adapter 10 detects the reverse communication from the report destination while the emergency report device 4 opens the line after transmitting the report message and is in a state of waiting for the reverse communication, and the relay is turned on. “a” is switched from the power supply 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 transmitted to the ISDN line, and decodes (decodes) 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 inversion circuit 17 inverts the polarity of the DC voltage when a response is received from the other party through the ISDN line 1 in response to a call from the analog line terminal, and
This is for transmitting the other party's response to the analog line telephone terminal connected to a.

The line capturing and detecting circuit 18 is connected to the emergency reporting device 4.
And outputs the detection output to the control circuit 25. P
The B receiver 19 is for identifying dial information (telephone number) when a dial is transmitted from the emergency notification device 4, and outputs the identified dial information to the control circuit 25.

The line capturing and monitoring circuit 20 is connected to the emergency reporting device 4
This is for monitoring the line capture by the response from the counterpart from the report destination. The detection output of the line capture monitoring circuit 20 is supplied to the control circuit 25.

The call signal generating circuit 21
When there is back communication from the report destination, 16
Hz for transmitting a calling signal.

The tone generating circuit 22 generates a pseudo ringback tone and other tone signals. As will be described later, when there is a backlash from the report destination while waiting for the backlash,
The terminal adapter 10 according to the present embodiment responds without waiting for a response due to off-hook of the emergency telephone 8 connected to the emergency reporting device 4, and provides a response to a digital line terminal connected to the network 3, A terminal for an analog line connected to a terminal adapter of this type prevents ringing caused by an incoming call due to reverse communication as much as possible.

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

The in-reporting detection circuit 23 receives the in-reporting output signal output by the emergency reporting device 4 during the reporting operation through the terminal 10b, detects the signal, and supplies 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 is for re-acquiring the line after the elapse of the waiting time for reciprocal communication and for storing the dial number of the report destination required when the report message is transmitted again. The control circuit 25 stores the dial information transmitted from the emergency report device 4 at the time of the first report, that is, the report destination dial number in the memory 24.

Next, the reporting operation using the ISDN line from the emergency reporting device 4 via the terminal adapter 10 will be described with reference to the sequence diagrams of FIGS.

FIG. 4 shows an operation sequence in the case where a report message is sent from the emergency report device 4 and the report destination immediately returns.

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 notification output signal from the terminal 4b and performs the line capturing operation. In the terminal adapter 10, the notification detection circuit 23 detects a notification output signal input through the terminal 10b, and outputs the detected output to the control circuit 2.
Send to 5. Thereby, the control circuit 25 of the terminal adapter 10 recognizes that the emergency notification device 4 is in the notification operation.

In the terminal adapter 10, the line capturing operation of the emergency notification device 4 is detected by the line capturing detecting circuit 18, and the detection output is sent to the control circuit 25. Control circuit 2
5 controls the tone generation circuit 22 according to 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 line / 4 line conversion circuit 15, the power supply circuit 16, the polarity inversion circuit 17, and the analog port 10a.

After detecting the dial tone signal, the emergency notification device 4 sends the dial number to the notification destination. In the terminal adapter 10, this dial number information is P
The signal is identified by the B receiver 19 and sent to the control circuit 10.
The control circuit 10 stores the dial number information in the memory 24 and, based on the dial number information,
The call operation to the DN line 1 is performed. That is, "SET
An "UP" message is sent to the 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 report destination responds, the ISDN exchange side sends a "CON"
Since the "N" message is sent, the control circuit 25 of the terminal adapter 10 detects this message, controls the tone generation circuit 22, and stops the generation of the ringback tone.

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

Thereafter, the emergency notification device 4 is in a state of waiting for a reverse communication, and once releases the line. Terminal adapter 1
At 0, this line release 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 standby state of the emergency notification device 4 from the detection output and the notification output signal.

In response to the detection output of the line release, the control circuit 25 sends a "DISC" message of the line release to the IS.
Send it to the DN exchange side. Thereafter, the "REL" message and the "REL COMP" message are exchanged between the terminal adapter 10 and the ISDN exchange side, and the line is released.

Thereafter, when the callee performs a call operation for reverse communication, the terminal adapter 10 receives a "SET UP" message at the time of the call from the ISDN exchange side.
At this time, the control circuit 25 detects, based on the calling number included in the “SET UP” message, whether the called party is “110” or “119” of the report destination.

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

Control circuit 25 of terminal adapter 10
Turns on the relay RA when detecting the incoming call due to the reverse communication from the report destination. Then, the contact a is switched from the power supply circuit 16 side to the line capture monitoring circuit 20 side.

Thereafter, when the control circuit 25 confirms from the detection output of the notifying detection circuit 23 that the emergency reporting device 4 is reporting, the control circuit 25 generates a call signal of the emergency reporting 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 reporting 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 unlikely that the incoming call of the reverse communication is transmitted to the analog line telephone terminal 5 and the analog line telephone terminal 5 answers before the emergency telephone 8 answers off-hook. Absent.

At the same time, the control circuit 25 sets “SET
When it is detected from the calling number included in the “UP” message that the called party is “110” or “119” of the report destination, the response is performed without waiting for the off-hook response of the emergency telephone 8. A "CONN" message, which is a message of the line connection, is sent out, and a response is made to the incoming call of the reverse communication from the destination. And the control circuit 25
Controls the tone generation circuit 22 to generate a pseudo ring-back tone and send it to the reporting destination that has received the reverse communication.

Thereafter, when the emergency telephone 8 makes a response by off-hook, the line capture by this response is detected by the line capture monitoring circuit 20 of the terminal adapter 10. When the control circuit 25 receives the line capture detection output from the line capture monitoring circuit 20, the control circuit 25 controls the tone generation circuit 22 to stop the generation of the pseudo ring-back tone, turns off the relay RA, and sets the contact a Feeder circuit 16
Control to return to the side.

As a result, the emergency telephone 8 and the report destination enter a state of mutual communication via the ISDN line 1.

Thereafter, when the telephone is turned on by the emergency telephone 8 as a call termination operation, a message "DISC", "REL", and "REL COMP" for disconnecting the line are sent.
Is exchanged, and the line is disconnected. This is the end of the notification operation.

Next, an operation sequence in the case where there is no reverse communication from the police station or the fire station, which is the report destination, even after 5 seconds, which is the reverse communication standby time, has elapsed, will be described with reference to FIG. I do. In the sequence of FIG. 5, the sequence from the start of the notification in FIG. 4 to the transmission of the notification message is exactly the same, and thus is omitted.

In this case, after the line was opened for standby for back-talking, no back-talk was received from the destination even though the back-off standby time of 5 seconds had elapsed, so that the emergency reporting device 4
Then, a line capturing operation is performed. Then, in the terminal adapter 10, the line capture is detected by the line capture monitoring circuit 20, and the detection output is supplied to the control circuit 25.

The control circuit 25 is connected to the line capture monitoring circuit 2
When the line capture detection output from 0 is received, the dial number information of the report destination stored in the memory 24 is read out, and based on this, the call operation to the ISDN line 1 includes the telephone number indicating the report destination. 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" arrives, and the ISDN line is connected. The emergency notification device 4 sends out a notification message through the connected ISDN line. Thereby, the report message is sent to the report destination again via the ISDN line.

Then, the emergency notification device 4 is again in a state of waiting for reverse communication, and releases 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-talking within the waiting time for back-talking, the emergency notification device 4 sends out the notification message again. The operation sequence at that time is the same as the sequence described with reference to FIG. Similarly, the line is connected to the report destination using the report destination telephone number stored in the memory 24 of the terminal adapter 10, and the process is executed.

In the above embodiment, the terminal adapter is provided not only for the emergency notification device but also for a port for connecting another general analog telephone line terminal. 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 a configuration of a terminal adapter dedicated to the emergency notification device is used.

[0087]

As described above, according to the terminal adapter of the present invention, the emergency notification through the ISDN line can be performed without causing the above-mentioned problem by using the emergency notification device for the analog line. I can do it.

[Brief description of the 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 illustrating an example of an operation of the emergency notification device.

FIG. 4 is a sequence diagram illustrating a flow of an emergency notification control process using the terminal adapter according to the present invention.

FIG. 5 is a sequence diagram illustrating a flow of an emergency notification control process using the terminal adapter according to the present invention.

[Explanation of symbols]

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

Claims (5)

[Claims] 1. A communication system according to claim 1, further comprising: acquiring a line in response to a start signal generated in an emergency, transmitting a dial number of a preset report destination, transmitting a report message, and then releasing the captured line to release the report destination. Waiting for the reverse communication from the system, and when the reverse communication cannot be detected, the system further comprises at least an analog port to which an analog line emergency report device having a function of capturing the line and transmitting the report message is connected, What is claimed is: 1. A terminal adapter for connecting a device to an ISDN line, comprising: line capture detecting means for detecting a line capture of the emergency notification device; and the emergency notification device after the line capture is detected by the line capture detection device. Means for identifying the dialed number of the report destination transmitted from the system and making a call to the report destination via the ISDN line; Storage means for storing the dial number of the report destination issued; reverse communication for detecting an incoming call due to reverse communication from the report destination by detecting a calling number in the call information from the ISDN line; Detecting means, after sending the report message from the emergency report device, detecting the line release of the emergency report device by the line capture detecting device, and thereafter detecting the incoming call from the report destination by the reverse report detecting device. Means for automatically making a call through the ISDN line by using the dial number of the notification destination stored in the storage means when detecting the line capture of the emergency notification device again, A terminal adapter comprising: 2. The terminal adapter according to claim 1, further comprising a notification-in-progress detection means for detecting a report-in-progress output signal output by the emergency notification device during activation of the report. 3. A call signal generating means for sending a call signal to the emergency notification device connected to the analog port when a call is received via the ISDN line, and When an incoming call from a report destination is detected, a response signal to the incoming call is sent to the ISDN line side without waiting for a response from the emergency report device to a call signal from the call signal generating means. The terminal adapter according to claim 1, further comprising: a response unit. 4. The terminal adapter according to claim 3, wherein the pre-response means transmits a response signal to the ISDN line side to the report destination connected to the emergency report device until a response is received. A terminal adapter for transmitting a pseudo ringback tone for a period of time. 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 transmitting a notification message from the emergency notification device. In the case where the line release of the emergency reporting device is detected by the line capture detecting means, and then, when the incoming call from the report destination is detected by the reverse communication detecting means, the notification during the detection is detected by the output-in-report detecting means. A terminal adapter for transmitting the call signal only through the analog port for the emergency notification device.