JPH10322476A - Modem system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To report immediately the fact that a trouble occurred to a communication opposite party through a telephone line by switching a changeover switch when a prescribed signal is received. SOLUTION: On the occurrence of trouble such as a fault in a monitor object, a controller 3 that monitors the monitor object sends a forced switching signal 30 to a DSVD modem 10. A data pump IC 11 sends the forced switching signal 30 to an emergency switching circuit 12. When the emergency switching circuit 12 receives the forced switching signal 30, the changeover switch is immediately thrown to the position of a converter 25. Thus, the connection between a handset 2 and a telephone line 1 is interrupted and transmission data by the data pump IC 11 is attained and the controller 3 reports a notice of occurrence of trouble such as a fault to a prescribed communication opposite party via the data pump IC 11, the converter 24, and a DAA 26.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a modem (MODE)
M: Modulator / Demodulator (DSVD) that enables voice communication and data communication using one telephone line.
Data) It relates to a modem device.

[0002]

2. Description of the Related Art As shown in FIG. 3, a DSVD modem device is used by being connected to one telephone line 1, a handset 2, and a control device 3 connected to a public line network. This enables voice communication with the handset 2 and data communication with the control device 3 to be performed with a communication partner. The handset 2 is formed of a telephone or the like, and performs input and output of voice (analog signal). The control device 3 includes a terminal device having an input / output function of data (digital signal).

In such a DSVD modem device 20,
A handset use detection circuit (hereinafter simply referred to as a use detection circuit) 21 for performing voice communication and data communication;
Changeover switch 22, data pump IC 23, D
/ A / A / D converters (hereinafter simply referred to as converters) 24 and 25 and DAA (Date Access Arrangement)
26.

The use detection circuit 21 detects a use state of the handset 2, that is, whether or not the handset 2 can execute voice input / output. This is detected, for example, by whether or not the handset of the handset 2 is lifted. The changeover switch 22 switches the connection state between the telephone line 1 and the handset 2 according to the detection result of the use detection circuit 21.

The data pump IC 23 performs data modulation / demodulation, data compression, error correction, and the like. The converter 24 is composed of the data pump IC 23 and the DAA
The D / A conversion or the A / D conversion is performed between the A.26 and the D.A. The converter 25 performs D / A conversion or A / D conversion between the handset 2 and the data pump IC 23.
The conversion is performed. DAA 26 is a converter 24
This is for ensuring the consistency between the analog signal from the telephone and the signal of the telephone line 1.

In the DSVD modem device 20 configured as described above, when the use detection circuit 21 detects the use of the handset 2, the changeover switch 22 switches the connection between the handset 2 and the telephone line 1. As a result, voice communication (transmission and reception of analog signals) can be performed between the handset 2 and the communication partner on the public line network, as in the case of normal telephone communication.

If the handset 2 is not in use, the changeover switch 22 performs switching so that the handset 2 and the converter 25 are connected. And
Then, the analog signal input by the handset 2 is
The signal is converted by the converter 25 into a digital signal.
As a result, the DSVD modem device 20 performs so-called DSVD operation, that is, simultaneously performs both voice communication and data communication with a communication partner on the public line network via the data pump IC 23, the converter 24, and the DAA 26. It becomes possible. During DSVD operation,
Power for the handset 2 is supplied from a handset power supply (not shown).

[0008]

However, the conventional DSVD modem device 20 described above cannot perform the DSVD operation while the handset 2 is in use. This is because the switch 22 connects the handset 2 to the telephone line 1 when the handset 2 is used. That is, when the handset 2 is used, data cannot be exchanged by the data pump IC 23 with a communication partner on the public line network.

Therefore, the DSVD modem device 20
For example, even if the control device 3 or another device connected to the control device 3 has a function of notifying a communication partner of the occurrence of a trouble such as a failure, if the handset 2 is in use, the communication partner is notified of the fact. Can not. Generally, notification of occurrence of a trouble such as a failure often requires urgency. Therefore, notifying the occurrence of a trouble after the use of the handset 2 is completed may cause a problem.

[0010] Therefore, an object of the present invention is to provide a modem device having an emergency calling function. Note that the emergency call function here is a function of immediately transmitting the occurrence of a trouble to a communication partner via a telephone line regardless of whether the handset is in use or not.

[0011]

SUMMARY OF THE INVENTION The present invention provides a modem device devised to achieve the above-mentioned object, comprising: a line connected to a public line network; a voice input / output device for inputting / outputting voice; Connected to a data input / output device for inputting / outputting data, and via the one line, a communication partner on the public network, voice communication using the voice input / output device, and the data input / output device. A modem device for performing data communication using the voice input / output device, the voice input / output device detecting use of voice input or output, and the voice input / output device based on a detection result of the use detection device. A switch for connecting the one line to the voice input / output device when voice input or output is performed by the output device; and a use signal upon receiving a predetermined signal from the data input / output device. Irrespective of the detection result at the stage, when the predetermined signal is received, an emergency changeover means for changing over the changeover switch so that the one line is connected to the data input / output device is provided. It is assumed that.

In the above-described modem device, when inputting or outputting voice in the voice input / output device, a changeover switch connects one line to the voice input / output device based on the detection result of the use detecting means. Thus, it is possible to perform voice communication between the voice input / output device and a communication partner on a public line network. At this time, when the data input / output device issues a predetermined signal due to, for example, a trouble occurring in the data input / output device, the emergency switching unit switches the changeover switch at that time to connect the data input / output device to one line. To connect. Therefore, if this modem device is used, even at the time of voice input / output by the voice input / output device,
If the data input / output device issues a predetermined signal in response to the occurrence of a trouble or the like, it is possible to immediately notify the communication partner of that fact.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a modem device according to the present invention will be described with reference to the drawings. Here, the modem device according to the first aspect of the present invention will be described first.

FIG. 1 is a block diagram showing a schematic configuration of a DSVD modem device 10 according to the present embodiment.
FIG. 2 is a block diagram showing a usage form of the DSVD modem device 10. However, the same components as those of the related art (see FIG. 3) are denoted by the same reference numerals, and the detailed description thereof will be omitted.

As shown in FIG. 2, the DSV of this embodiment
The D modem device 10 is connected to the telephone line 1 in the same manner as the conventional one.
Are connected to the handset 2 and the control device 3 for use. However, the control device 3 is the telephone line 1
Is connected to the monitoring target 4 to be remotely managed through the server, and has a function of monitoring the operation of the monitoring target 4 and the like. An example of the monitoring target 4 is, for example, an intrusion alarm device. When a trouble such as a failure occurs in the monitoring target 4, the control device 3 sends a forced switching signal 30 as a predetermined signal to the DSVD modem device 10 as an emergency call request. .

The DSVD modem device 10 connected to the telephone line 1, the handset 2, and the control device 3 is configured as shown in FIG. That is, similarly to the conventional one, the use detection circuit 21 and the changeover switch 22
, Converters 24 and 25, and a DAA 26.

However, in the DSVD modem device 10, the data pump IC 11 has the following functions in addition to the conventional functions. In the data pump IC 11, when the control device 3 sends out the forced switching signal 30,
Upon receiving this, the forced switching signal 30 is sent to the emergency switching circuit 12 described later.

The DSVD modem device 10 includes:
Unlike the conventional one, an emergency switching circuit 12 is provided. The emergency switching circuit 12 includes the data pump IC 1
1 and the changeover switch 22, when the forced changeover signal 30 is received from the data pump IC 11, the changeover switch 22 is switched based on the forced changeover signal 30. Specifically, when the forced switch signal 30 is received, even when the handset 2 is used, that is, even when the changeover switch 22 connects the handset 2 to the telephone line 1, the connection is changed to the telephone line 1 (use detection). Switch to the converter 25 side instead of the circuit 21) side.

That is, when the emergency switching circuit 12 receives the forced switching signal 30, the switching switch 22 is forcibly switched regardless of the detection result by the use detection circuit 21, and the data pump IC 11
4 and the DAA 26 to exchange data with a communication partner on a public line network.

Here, the DSVD constructed as described above
An operation example in the modem device 10 will be described.

In the DSVD modem apparatus 10, when the use detection circuit 21 detects the use of the handset 2, the changeover switch 22 switches the connection between the handset 2 and the telephone line 1 as in the prior art.
Thus, voice communication can be performed between the handset 2 and a communication partner on the public line network.

At this time, apart from the voice communication by the handset 2, if a trouble such as a failure occurs in the monitoring target 4, the control device 3 monitoring the monitoring target 4 performs the DSV operation.
A forced switching signal 30 is transmitted to the D modem device 10. When receiving the forced switching signal 30, the data pump IC 11 sends the forced switching signal 30 to the emergency switching circuit 12. Then, the emergency switching circuit 12
Then, upon receiving the forced switching signal 30, the connection of the changeover switch 22 is forcibly switched to the converter 25 immediately.

Thus, the handset 2 and the telephone line 1
Is disconnected, and the data pump IC 11 can transmit data. Then, a trouble such as a failure has occurred from the control device 3 to a predetermined communication partner (for example, a host device that manages the control device 3 and the monitoring target 4) via the data pump IC 11, the converter 24, and the DAA 26. A notification to that effect is made. It should be noted that the call made by the handset 2 up to that point is disconnected.

If the handset 2 is not used,
Since data can be transmitted by the data pump IC 11, when a trouble such as a failure occurs in the monitoring target 4, the control device 3 notifies a predetermined communication partner of the trouble as in the related art.

As described above, in the DSVD modem apparatus 10 of the present embodiment, when the forced switching signal 30 is received, the emergency switching circuit 12 forcibly switches the connection of the switch 22 to the converter 25 side. I have. Therefore, regardless of whether the handset 2 is in use or not, if a trouble occurs in the monitoring target 4, it is possible to immediately notify a predetermined communication partner of the fact through the telephone line 1.

That is, in the DSVD modem device 10, an emergency transmission function is realized by the emergency switching circuit 12 and the forced switching signal 30. Therefore, if the DSVD modem device 10 is used, the notification of the occurrence of a trouble such as a failure does not have to be waited until the use of the handset 2 is finished, so that no trouble occurs. In other words, for example, when the control device 3 or the monitoring target 4 is remotely managed, even if a trouble or the like occurs in the control device 3 or the monitoring target 4, it is possible to quickly respond to the trouble. .

Next, another embodiment of the modem device according to the present invention, specifically, the DS according to the second aspect of the present invention will be described.
The VD modem device will be described. In the above-described embodiment, if a trouble or the like occurs in the monitoring target 4 while the handset 2 is being used, the call made by the handset 2 up to that point is disconnected. For this reason, the user (user) who has been using the handset 2 may be suddenly interrupted, and may be surprised or inconvenienced.

To prevent this, the DSVD of the present embodiment
In the modem device, in addition to the case of the above-described embodiment,
It has a function of notifying the user of the emergency call. Specifically, when the emergency switching circuit 12 switches the connection of the changeover switch 22 based on the forced changeover signal 30, the data pump IC 11 transmits an audio signal to the handset 2 via the converter 25 and the changeover switch 22 at that time. Then, the audio signal is output by the handset 2 as audio.

This audio signal is transmitted to the control unit 3 or the DS
This is stored in a memory (not shown) in the VD modem device in advance, and is, for example, a signal in which a human voice announcement is recorded as a digital signal.

In the DSVD modem device to which such a function is added, when the data pump IC 11 receives the forced switching signal 30 from the control device 3, it sends it to the emergency switching circuit 12, and simultaneously sends the signal to the control device 3 or DSVD.
An audio signal stored in a memory in the modem device is transmitted to converter 25 in advance. Then, after this audio signal is converted into an analog signal by the converter 25, it is output by the handset 2 via the changeover switch 22.

Thus, if a trouble occurs in the monitoring target 4, it is possible to immediately notify a predetermined communication partner via the telephone line 1 irrespective of whether the handset 2 is in use or not. With handset 2
If is currently in use, a notification that an emergency call is to be made can be made from the handset 2. Therefore, even if there is a line disconnection for emergency calling, the user of the handset 2 can know the disconnection by the output from the handset 2, so that the user may be surprised or inconvenienced by the interruption of the call. Not even.

[0032]

As described above, the modem device of the present invention realizes the emergency calling function by the emergency switching means switching the changeover switch according to the predetermined signal (the forced switching signal). That is, regardless of whether or not the voice input / output device (handset) is performing voice input / output, if a trouble occurs or the like, it is possible to immediately notify the communication partner of the occurrence. Therefore, if this modem device is used, the notification of the occurrence of a trouble or the like does not have to be waited until the end of voice input / output, and no trouble is caused by this.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of an example of an embodiment of a DSVD modem device according to the present invention.

FIG. 2 is a block diagram showing an example of a usage form of a DSVD modem device according to the present invention.

FIG. 3 is a block diagram showing a schematic configuration of a conventional DSVD modem device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Telephone line 2 Handset 3 Control device 10 DSVD modem device 11 Data pump IC 12 Emergency switching circuit 21 Handset use detection circuit 22 Switching switch 30 Forced switching signal

Claims (2)

[Claims] 1. A line connected to a public line network, a voice input / output device for inputting / outputting voice, and a data input / output device for inputting / outputting data are connected to each other through the one line. A modem device for performing voice communication using the voice input / output device and data communication using the data input / output device with a communication partner on the public line network, wherein the voice input / output device inputs or outputs voice. Use detection means for detecting that the voice input / output is performed, and based on the detection result of the use detection means, when the voice input / output is performed by the voice input / output device, the one line and the voice input / output A changeover switch for connecting to a device, and receiving a predetermined signal from the data input / output device, regardless of a detection result by the use detecting means, at the time of receiving the predetermined signal, the one line A modem device for switching the changeover switch so that the data input / output device is connected to the modem device. 2. The switch notifying means for sending an audio signal stored in advance to the audio input / output device and outputting the audio signal as audio by the audio input / output device when the emergency switching means switches the changeover switch. The modem device according to claim 1, further comprising: