JPH06253033A - Data communications equipment for telephone line - Google Patents

Abstract

PURPOSE:To improve monitorability and manageability for a slave station by transmitting the content of the abnormality of the slave station in response to a ringer signal received from a master station, at the time of the generation of the abnormality of the slave station. CONSTITUTION:The slave station is connected through a telephone line with the master station, and a response signal is returned from the slave station to the master station in response to the ringer signal transmitted from the master station. This device is equipped with an abnormality signal responding means 11 which receives the abnormality content of a slave station 3, judges the presence or absence of the response of the slave station based on the number of times of the generation of the ringer signal from a master station 1, and transmits the abnormality content to the master station at the time of the absence of the response as the result of the judgment, and an abnormality signal detecting means 12 which detects the abnormality content superimposed on the telephone line, and transfers it to the master station.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone line data communication device in which a remotely located master station and slave station are connected via a telephone line, and particularly when the slave station is abnormal, the master station The present invention relates to a telephone line data communication device capable of improving the monitorability by notifying the master station of the content of the abnormality in accordance with the ringer signal.

[0002]

2. Description of the Related Art Conventionally, monitoring of a monitoring target provided in a remote place is performed by a slave station which monitors the monitoring target and a master station which sends a ringer signal to the slave station through a telephone line and receives response data from the slave station. A data communication device for a telephone line is widely used.

FIG. 4 is a diagram showing the configuration of a telephone line data communication apparatus of this type. This telephone line data communication device connects a public telephone line network 2 to a master station 1 via a public telephone line L1, and further connects a slave station 3 to this public telephone line network 2 via a public telephone line L2. It has been configured.

Of these, the master station 1 has a data processing section 1a and a modem 1b, and the slave station 3 has a data processing section 3a and a modem 3b and has a function of monitoring a monitoring target (not shown). There is.

In such a configuration, the master station 1 blocks the public telephone line L1 and dials the telephone number of the slave station 3. When the line number of the slave station 3 is dialed from the master station 1 in this way, the public telephone line network 2 calls the slave station 3 by generating a ringer signal on the public telephone line L2 of the corresponding slave station 3. When the slave station 3 receives the ringer signal, the modem 3b
The number of lingers is counted at, and when the count value reaches 3, the public telephone line L2 and the modem 3b are connected and the public telephone line L2 is blocked. When the public telephone line L2 is blocked in this way, the public telephone line network 2 connects the public telephone lines L1 and L2, whereby data transmission can be performed between the master station 1 and the slave station 3. Here, the slave station 3 transmits data such as monitoring information of a monitoring target and abnormality information of the slave station 3 from the data processing unit 3a to the public telephone line L2 via the modem 3b.

On the other hand, the master station 1 sends the monitoring information to the modem 1
The data is received via b, and the data processing unit 1a processes the data. The master station 1 also sends control information and the like to be monitored to the public telephone line L1 via the modem 1b.

In this way, when the data transmission between the master station 1 and the slave station 3 is completed, the master station 1 and the slave station 3 disconnect the public telephone lines L1 and L2 and open the telephone line. , Data transmission ends. Further, subsequently, the master station 1 similarly performs data transmission with another slave station (not shown).

[0008]

However, in the above-mentioned telephone line data communication device, when the function related to the data transmission of the slave station 3 fails, the abnormality information of the slave station 3 is not transmitted to the master station 1. There is.

Since the data processing unit 3a and the modem 3b of the slave station 3 consume a large amount of power, the slave station 3 immediately stops its function when a power failure occurs, so that the master station 1 receives a data transmission request. There is a problem that I can not respond even if there is.

On the other hand, the master station 1 calls the slave station 3 by a ringer signal, but if there is no response due to an abnormality in the slave station 3, the telephone line is opened after a certain period of time has passed, It is determined that the slave station 3 is abnormal.

However, the content of the abnormality is, for example, a power failure,
It is difficult to identify such as due to equipment failure or broken telephone line. Then, the abnormality content cannot be specified and the monitorability of the slave station 3 is degraded.

Further, in a telephone line data communication device in which a plurality of slave stations 3, ... And the master station 1 sequentially transmit data, when transmission to several slave stations becomes impossible, all slave stations are transmitted. Of the data transmission times set for the stations 3, ..., the proportion of the access time for the non-transmittable slave station is large, so that wasteful data transmission occurs and smooth management of the slave station 3 is inconvenient. There's a problem.

The present invention has been made in consideration of the above circumstances, and when an abnormality occurs in a slave station, the content of the abnormality is responded in response to a ringer signal received from the master station, thereby improving the monitorability of the slave station. A telephone line data communication device capable of improving manageability.

[0014]

The invention according to claim 1 is to connect a slave station to a master station via a telephone line, receive a ringer signal sent from the master station, and receive a response signal from the slave station. In the telephone line data communication device for returning the data to the master station, the abnormality content of the slave station is received, and the presence or absence of a response from the slave station is determined based on the number of times a ringer signal is generated from the master station. As a result, when there is no response, an abnormality signal response means for transmitting the abnormality content to the master station, and an abnormality signal detection means for detecting the abnormality content on the telephone line and passing it to the master station. A telephone line data communication device comprising:

The abnormal signal response means is provided with an abnormality content input section for inputting the abnormality content of the slave station and a response of the slave station when the number of times the ringer signal from the master station is generated exceeds a predetermined number. A slave station response determination unit that determines whether there is no response, and an abnormality signal transmission that transmits the abnormality content input from the abnormality content input unit to the telephone line when the slave station response determination unit determines that there is no response from the slave station. Section and a connection switch for connecting the telephone line to the abnormality signal transmission section when the abnormality content is transmitted to the telephone line by the abnormality signal transmission section and for releasing the connection between the telephone line and the slave station. And a standby power supply that supplies power so that the content of the abnormality indicating that there is a power failure abnormality can be sent to the telephone line when the response unit main body fails due to the power failure of the slave station. ing.

The abnormal signal detecting means determines an abnormal signal detecting section for detecting an abnormal content on the telephone line, and an abnormal signal passed to the master station by discriminating the abnormal content detected by the abnormal signal detecting section. And a discrimination unit.

[0017]

Therefore, in the invention corresponding to claim 1, by taking the above-mentioned means, in the abnormality signal response means, the abnormality content input section inputs the abnormality content of the slave station to determine the slave station response. Section determines that there is no response from the slave station when the number of times the ringer signal is generated from the master station exceeds a predetermined number, and the abnormal signal transmission section determines that there is no response from the slave station using the slave station response determination section. When the error content is input, the error content input from the error content input unit is sent to the telephone line, and when the connection switching unit sends the error content to the telephone line, the abnormal signal output unit sends the error signal to the telephone line. And disconnect the telephone line from the slave station.

On the other hand, in the abnormal signal detecting means, the abnormal signal detecting section detects the abnormal content on the telephone line, and the abnormal signal discriminating section discriminates the abnormal content detected by the abnormal signal detecting section. Give it to the parent station.

As described above, when an abnormality occurs in the slave station, the content of the abnormality is responded in response to the ringer signal received from the master station, whereby the monitorability and manageability of the slave station can be improved.

Further, in the above-mentioned abnormal signal response means,
If the standby power supply causes a power failure in the response station due to a power failure in the slave station, power is supplied so that the abnormality content indicating that there is a power failure abnormality can be sent to the telephone line. Even in this case, the same effects as those described above can be obtained.

[0021]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of a telephone line data communication apparatus according to an embodiment of the present invention. The same parts as those in FIG. 4 are designated by the same reference numerals and detailed description thereof will be omitted. Now, only different parts will be described.

That is, this telephone line data communication device is provided with an abnormal signal response device 11 and an abnormal signal detection device 12, the abnormal signal response device 11 is connected to the public telephone line L2 on the slave station side, and The abnormal signal detection device 12 is connected to the public telephone line L1 on the master station side.

Of these, the abnormal signal response device 11 includes a ringer detection counting unit 13 and a number-of-times determining unit 1 as shown in FIG.
4, an abnormal state input unit 15, a pulse generation unit 16, an abnormal signal transmission unit 17, a switching relay 18, a hook control unit 19 and a standby power supply 20.

The ringer detection counting section 13 has a function of detecting the ringer signal transmitted from the master station 1 from the public telephone line L2, counting the number of ringers, and sending the count result to the number-of-times judging section 14.

The number-of-times determining unit 14 receives the counting result from the ringer detection counting unit 13, determines whether or not the slave station 3 responds based on the counting result, and gives the determination result to the pulse generating unit 16. In this case, however, it has a function of determining that there is no response from the slave station 3 when the number of calls by the ringer signal exceeds 5.

On the other hand, the abnormality content input section 15 has, for example, three input terminals corresponding to three types of abnormality content, and outputs an abnormality content signal from the slave station 3 and its monitored object via any one of the input terminals. It has a function of receiving and giving to the pulse generator 16.

The pulse generator 16 has a timer function, and when the number-of-times determination unit 14 determines that the slave station 3 has no response, the abnormality content signal of the abnormality content input unit 15 is used as a pulse signal for a fixed time. Abnormal signal transmission unit 1 coded
7, the switching relay 18 and the hook control unit 19.

The abnormal signal transmitting section 17 includes a pulse generating section 16
It has a function of transmitting a tone signal of a predetermined frequency to the public telephone line L2 in response to the coded abnormality content signal received from the.

The switching relay 18 is a public telephone line L2.
To the slave station 3 or the abnormal signal sending section 17, and when the pulse generating section 16 sends an abnormal content signal, the a side connection connecting the slave station 3 and the public telephone line L2. Is switched to the b-side connection that connects the abnormal signal sending unit 17 and the public telephone line L2.

The hook control section 19 has a function of blocking the public telephone line L2 when the pulse generation section 16 generates an abnormality content signal and the connection of the switching relay 18 becomes the b side connection. The standby power supply 20 supplies power to the abnormal signal response device 11 at the time of power failure. Next, the abnormal signal detection device 12 on the master station side will be described with reference to FIG. The abnormal signal detection device 12 includes a coupling unit 21, an abnormal signal detection unit 22,
Abnormal signal determination unit 23, abnormal content output unit 24 and power supply unit 2
Have five.

Of these, the coupling unit 21 is connected to the public telephone line L1 and, of the signals flowing through this public telephone line L1,
It has a function of extracting only the AC component and sending it to the abnormal signal detection unit 22.

The abnormal signal detecting section 22 is composed of, for example, a band pass filter (hereinafter referred to as BPF), a frequency detecting circuit and a time filter, and an abnormal content signal (tone) is detected by the BPF and the frequency detecting circuit from the AC component sent from the coupling section 21. Signal), and only when an abnormality content signal is detected continuously by a time filter for a fixed time of about 1 second so as to prevent signal detection by a modem signal and a voice signal, the abnormality content signal is detected and the abnormality is detected. The content signal is sent to the abnormal signal discriminating section 23.

The abnormal signal discriminator 23 is an abnormal signal detector 22.
The abnormality content of the slave station 3 is determined on the basis of the abnormality content signal detected by and the content is output to the abnormality content output unit 24.

The abnormality content output section 24 is, for example, a relay contact or an open collector output of a buffer, and shows the content of the abnormality determined by the abnormality signal determination section 23 to the master station 1.
Alternatively, it has a function of sending to another device (not shown). A power supply unit 25 is connected to the abnormal signal detection unit 22 and the abnormal signal determination unit 23. Next, the operation of the telephone line data communication device configured as described above will be described. First, when the slave station 3 has an abnormality and cannot respond, the slave station 3 applies an abnormality content signal to the abnormality content input unit 15 according to the abnormality content.

When the line number of the slave station 3 is dialed from the master station 1 in this state, the public telephone line network 2 connects the public telephone lines L1 and L2 based on this line number and the public telephone line is connected. A ringer signal is transmitted to the slave station 3 via the line L2.

Further, the ringer detection counting unit 13 and the number-of-times determining unit 14 of the abnormal signal responding device 11 detect the ringer signal, and the number of the ringer signals counted since the slave station 3 cannot respond to the call is five. When it exceeds the threshold, it is determined that there is no response from the slave station 3, and a pulse generation request is sent to the pulse generator 16.

The pulse generator 16 codes and outputs the abnormality content signal of the abnormality content input unit 15 in response to a pulse generation request. When a pulse is generated in the pulse generator 16, the switching relay 18 switches and connects the public telephone line L2 to the abnormal signal transmitter 17. Also, since the public telephone line L2 is connected to the abnormal signal transmission unit 17 by the switching of the switching relay 18, the hook control unit 19 thereby blocks the public telephone line L2.

In this state, the abnormal signal sending unit 17 converts the abnormal content signal coded by the pulse generating unit 16 into a tone signal and sends it to the public telephone line L2. In addition,
These abnormality content input unit 15 and linger detection counting unit 1
Since the standby power source 20 is connected to the number 3, the frequency determination unit 14, the pulse generation unit 16, the abnormal signal transmission unit 17, and the hook control unit 19, the above-described operation should be performed even when the slave station 3 is in a power failure. Is possible. Further, the tone signal sent from the abnormal signal sending unit 17 is sent from the public telephone line L2 to the public telephone line L1 via the public telephone line network 2.

On the other hand, in the abnormal signal detecting device 12 connected to the public telephone line L1, this tone signal is transmitted to the coupling section 2.
1 is detected by the abnormal signal detector 22 and is sent to the abnormal signal determiner 23. The abnormal signal discriminating unit 23 decodes the tone signal, discriminates the content of the slave station abnormality indicated by the tone signal, and sends it to the abnormal content output unit 24. As a result, the abnormality content output unit 24 outputs the abnormality content of the slave station to the master station 1 and other devices.

As described above, according to this embodiment, the abnormality content input unit 15 applies the abnormality content signal when the slave station 3 is in an abnormal state, and the ringer detection counting unit 13 and the number of times determining unit 14 cause the master station 1 to operate. The ringer signal applied from the slave station 3 is counted to determine whether there is a response from the slave station 3, and when there is no response from the slave station 3, the abnormality signal sending section 17 outputs the above abnormality content signal as a tone signal. The detection unit 22 detects the content of the abnormality based on the tone signal, and the abnormality content output unit 24 outputs the content of the abnormality to the master station 1. Therefore, the slave station 3 has a function related to data transmission. When an abnormality such as failure information cannot be transmitted to the master station 1 due to a failure, the content of the abnormality is responded in response to the ringer signal received from the master station 1 to improve the monitorability and manageability of the slave station 3. Rukoto can.

Further, in this embodiment, the standby power supply 20 for detecting a power failure abnormality is provided, and when the power failure of the slave station 3 and the abnormality signal response device 11 occurs, the abnormality content input unit 15 and the ringer are provided so as to detect the power failure abnormality. Detection count unit 13, frequency determination unit 1
4, since the electric power is supplied to the pulse generator 16, the abnormal signal transmitter 17, and the hook controller 19, even when the slave station 3 and the abnormal signal response device 11 are out of power, the same effect as the above-described effect can be obtained. be able to.

In the above embodiment, the abnormality content input unit 1
Although the case of applying the abnormality content signal to 5 has been described,
Not limited to this, even when the monitoring contents are applied to the abnormality content input unit 15 from the monitoring target so that the monitoring can be continued even when there is an abnormality in the slave station, the present invention is similarly implemented and the same effect is obtained. Can be obtained. In addition, the present invention can be modified in various ways without departing from the scope of the invention.

[0044]

As described above, according to the present invention, the abnormal signal response means receives the abnormality content of the slave station and judges the presence or absence of the response of the slave station based on the number of times of the ringer signal generated from the master station. However, as a result of this judgment, if there is no response, the abnormality content is transmitted to the master station, and the abnormality signal detection means detects the abnormality content on the telephone line and passes it to the master station.
When an abnormality occurs in the slave station, by responding to the ringer signal received from the master station with the content of the abnormality, it is possible to provide a telephone line data communication device capable of improving the monitorability and manageability of the slave station.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a telephone line data communication device according to an embodiment of the present invention.

FIG. 2 is a block diagram of an abnormal signal detection device in the embodiment.

FIG. 3 is a block diagram of an abnormal signal response device in the embodiment.

FIG. 4 is a block diagram showing a configuration of a conventional telephone line data communication device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Parent station, 2 ... Public telephone network, 3 ... Slave station, 11 ... Abnormal signal response device, 12 ... Abnormal signal detection device, 13 ... Ringer detection counting unit, 14 ... Number determination unit, 15 ... Abnormality content input unit , 16 ... Pulse generator, 17 ... Abnormal signal transmitter, 1
8 ... Switching relay, 19 ... Hook control unit, 20 ... Standby power supply, 21 ... Coupling unit, 22 ... Abnormal signal detection unit, 23 ... Abnormal signal determination unit, 24 ... Abnormality content output unit, 25 ... Power supply unit, L
1, L2 ... Public telephone line.

Claims (4)

[Claims] 1. A slave station is connected to the master station via a telephone line,
In a telephone line data communication device that receives a ringer signal transmitted from the master station and returns a response signal from the slave station to the master station, the content of the abnormality of the slave station is received and the ringer signal from the master station is received. Determine the presence or absence of the response of the slave station based on the number of occurrences,
As a result of this judgment, when there is no response, an abnormal signal response means for transmitting the abnormal content to the master station, and an abnormal signal detection for detecting the abnormal content on the telephone line and passing it to the master station. A data communication device for telephone lines, comprising: 2. The abnormal signal response means includes an abnormality content input section for inputting the abnormality content of the slave station, and no response of the slave station when the number of times the ringer signal from the master station is generated exceeds a predetermined number. And a fault signal sending unit for sending the fault content input from the fault content input unit to the telephone line when the slave station response determining unit determines that there is no response from the slave station. And a connection switching unit that connects the telephone line to the abnormal signal transmission unit and releases the connection between the telephone line and the slave station when the abnormal content is transmitted to the telephone line by the abnormal signal transmission unit. The telephone line data communication apparatus according to claim 1, further comprising: 3. The abnormal signal responding means supplies power so that when the responding means body goes down due to a power failure of the slave station, the abnormality content indicating that there is a power failure abnormality can be sent to a telephone line. 3. The telephone line data communication device according to claim 1, further comprising a standby power supply. 4. The abnormal signal detecting means determines an abnormal signal detecting section for detecting an abnormal content on the telephone line, and an abnormal signal discrimination for delivering to the master station by discriminating the abnormal content detected by the abnormal signal detecting section. And a section.
The data communication device for the telephone line described.