JPS6265549A - Remote supervisory system - Google Patents

Abstract

PURPOSE:To prevent a talking state giving no reply to a transmission side from being generated by providing a bell incoming detection circuit detecting a bell incoming signal connected to a subscriber line and giving the 1st control signal after a prescribed time and a data signal detection circuit detecting a data signal at non-talking and giving the 2nd control signal. CONSTITUTION:A bell incoming detection circuit 7 inputs the 1st control signal to a control circuit 9 after a prescribed time in detecting a bell incoming signal from a supervisory station 1. Further, a data signal detection circuit 8 detects a data signal at non-talking state and inputs the 2nd control signal to the control circuit 9. When the 1st and 2nd control signals do not exist, the control circuit 9 switches a demarcation equipment 6 to the position of a terminal t2 and when the 1st or the 2nd control signal exists, the control circuit 9 switches the demarcation equipment 6 to the position of a terminal t1. When a station to be supervised responds within a prescribed time from the reception of a bell incoming signal from a supervisory station, the supervisory station and a telephone set 4 are connected switchingly by a demarcation equipment to form the talking state.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a remote monitoring system, and particularly to a remote monitoring system capable of transmitting and receiving data signals and making telephone calls using the same subscriber line.

[Background of the invention]

A system in which the monitoring station and the monitored station are connected by a subscriber line and switching between data signal transmission and reception and telephone calls was developed in Japanese Patent Laid-Open No. 58.
-215163.

However, in the described system, upon reception, it is determined whether the signal is a data signal or a call at the start of the call, and based on this determination, an operation is performed to switch the disconnector to the receiving side. Therefore,
If the receiving side is unattended and the sending side is in a call state, there is a problem in that the receiver does not respond even if the call is made, and the call charge is added to the sender's side.

[Purpose of the invention]

This invention solves the problems with conventionally proposed remote monitoring systems, and if there is a response on the receiving side within a predetermined time after the detection of a total of N incoming signals from the transmitting side, the monitoring station and the monitored ? l! It is an object of the present invention to provide a remote monitoring system in which a telephone of a station is connected and which eliminates the occurrence of a call state in which there is no response to the pressure on the transmitting side.

[Summary of the invention]

In the remote viewing system of the present invention, a monitoring station and a monitored station are connected by a subscriber line, and the monitored station is provided with a terminal device and a telephone. A disconnector is provided between the subscriber line, the terminal device, and the telephone, and the disconnector connects the monitoring station and the terminal device via the subscriber line when transmitting and receiving data signals.

During a fc call, the monitoring station and the t-filler are connected via a subscriber line.

This invention includes a bell incoming detection circuit that is connected to a subscriber line and detects a bell charge signal and issues a first control signal after a predetermined time; A data signal detection circuit is provided. Further, a control circuit is connected to the bell incoming detection circuit and the data signal detection circuit, and when this control circuit detects the first or second control signal, the disconnector is switched and the monitoring station and the terminal device are connected. Ru.

On the other hand, when the first and second control signals are not detected, the control circuit switches the disconnector to connect the K station and the telephone.

Therefore, if there is a response on the monitored station side within a predetermined time after receiving the bell incoming signal from the monitoring station, the monitoring station and the telephone are switched and connected by the disconnector, and a conversation is established. Even if a data signal is generated in a blocked state, the blocked state is maintained until the call is completed.

If a data signal is generated in a non-call state, or if there is no response from the monitored station within a predetermined period of time after the incoming bell signal from the monitoring station, the supervisor OtwJ and the terminal device switch the disconnector. Connected.

In this way, according to the present invention, a call state in which there is no response to the transmitting side pressure does not occur.

[Embodiments of the invention]

The figure shows the configuration of an embodiment of the remote monitoring system of the present invention, in which a monitoring station 1 and a monitored station 5 are connected by a joining line 2.

One end of the joining line 2 is connected to the common terminal 10 of the disconnector 6, and the input terminal of the bell incoming detection circuit 7 is connected to the joining line 2.

The terminal t of the separator 6 is connected to the communication #! The terminal device 3 is connected to the communication line 6a, and the input terminal of the data signal detection circuit 8 is connected to the communication line 6a. Further, the percentage filler 4 is connected to the terminal 1t of the separator 6 through a communication line 6b, and this communication, 116
b is connected to the input terminal of the data signal detection circuit 8.

The output terminals of the data signal detection circuit 8 and the bell reception detection circuit 7 are connected to the input terminal of the control circuit 9.
The output terminal of the circuit 9 is connected to the disconnector 6 by a connection 9a. The control line 3 is connected between the terminal device jIL3 and the control circuit 9.
Connected by a.

The disconnector 6, the terminal device 3, the data signal detection circuit 8, the incoming bell detection circuit 7, the control circuit 9, and the telephone 4 are connected to the monitored station 5.
It is located inside.

When the bell incoming detection circuit 7 detects a bell incoming signal from the monitoring station 1, it sends a first control signal to the control circuit 9 after a predetermined time.
Enter. Further, the data signal detection circuit 8 detects a data signal when a call is not made and inputs a second control signal to the control circuit 9. If the first and second control signals are not present, the control circuit 9 switches the disconnector 6 to the terminal t,5. When the first or second control signal is present, the control circuit 9
switch to the terminal tm side.

When the monitoring station 1 and the monitored station 5 are not in a communication state or in a data signal transmission/reception state, the first and second control signals are not present, so the disconnector 6 is connected to the terminal t. It has been switched.

Send data signal from monitoring station 1 to terminal device 3 □
In this case, a bell incoming signal is given from the monitoring station 1 to the bell incoming detection circuit 7 via the subscriber line 2.

The bell incoming detection circuit 7 inputs the first control signal to the switch circuit 9 after a predetermined time after detecting the bell incoming signal, and the control circuit 9 switches the disconnector 6 to the terminal t side.

Therefore, the monitoring station 1 and the terminal device 3 are connected by the subscriber side /m2 and communication @6a, and the monitoring station 1 also transmits data signals to the terminal device 3.

The data signal detection circuit 8 detects the data signal from the monitoring station 1 to the terminal device [3, and while the data signal is present, it gives a second control signal to the control circuit 9, and the disconnector 6 The terminal is switched to the t side.

When the transmission of the data signal from the monitoring station 1 to the terminal device 3 is completed, the second control signal is no longer input to the control circuit 9, and since the first control vR signal is also not present at this time, the disconnector 6 is switched to the terminal t side.

In this case, if the missing device of telephone 4 is removed within a predetermined period of time after the bell signal is received, monitoring) ffJl, subscriber line 2, disconnector 6
and telephone 4 to form a telephone line.

However, is the data signal output circuit w68 a communication? Since the data signal from the monitor 741 is detected via the IM 6b, the first control # signal is 餉IIi! 1 is input to the circuit 9 and the cutter 6
is terminal 1. can be switched to the side. Therefore, the monitoring station 1 and the terminal device 3 are connected via the subscriber line 2, and data communication becomes possible.

When making a call between monitoring station 1 and monitored station 5,
After the bell telegraph detection circuit 7 detects the bell multiplied signal, the receiver of the telephone 4 is disconnected within a predetermined time. In this state, the bell telegraph detection circuit 7 does not issue the first control signal, and the data signal detection circuit 8 does not issue the second control signal. Therefore, the disconnector 6 is switched to the terminal t side, and a communication line is formed by the monitoring station 1, the subscribing side IIM 2, the disconnector 6, communication@6b, and the telephone 4, and the communication line is formed between the monitoring station 1 and the monitored station 5. This makes it possible to fill the container.

When there is a fi communication between monitoring station 1 and monitored station 5,
The data signal detection circuit 8 does not issue the second control signal and the divider 6 is switched to the terminal t side.

Therefore, in the normal state, the cutter 6 maintains this state until the filling is completed. However, as will be described later, it is also possible to adopt a configuration in which only in the case of emergency data fi pieces from the terminal device 3, the caller is notified of the occurrence of emergency communication and the communication is switched to data communication.

Monitoring device from terminal device 3! When transmitting a data signal to tl, a control signal is input from the terminal f3 to the control circuit 9 via the control line 3a. With this control signal, the control circuit 9#'i disconnector 6 is switched to the terminal t1 side, and the monitoring device 1
Data communication becomes possible between the terminal device 3 and the terminal device 3. In this case, the control circuit 9 determines that the data signal from the terminal device 3 is an emergency signal, and even if the monitoring device 1 and the monitored station 5 are in a transmitting state, an emergency communication is issued to the caller. It is possible to configure such a structure that the disconnector 6 is switched to the terminal t1 side after a predetermined period of time.

In this way, in the jammed state, if there is a response within a predetermined time from the detection by the bell multiplication detection circuit 7 of the Pell appeasement signal, the communication state is established between the monitor wJ1 and the monitored station a 5. , a call state in which there is no response to the sender does not occur. Further, when the data signal from the terminal device fjjL3 is an emergency signal, the configuration can be such that the blocking state can be interrupted and the emergency data signal can be quickly sent to the monitoring device [IK 6].

〔Effect of the invention〕

As explained in detail above, according to the present invention, data signals and call signals can be clearly distinguished, and data signals can be sent and received and calls can be made between a monitoring station and a monitored station using a single subscriber line. During a call, if there is a response from the bell signal within a predetermined time, the monitoring station and the monitored station can communicate, so a jammed state occurs when there is no response on the sending side. It is possible to provide an unprecedented remote monitoring system. Therefore, the sending side does not have to wait for a long response, and the sending side is not charged an unreasonable call fee.

Switching between the data signal transmission/reception state and the packing state is also performed smoothly and quickly, and when an emergency data signal transmission/reception state occurs, the packing state is interrupted and the data signal transmission/reception state is quickly set. is also possible.

[Brief explanation of drawings]

The figure is a block diagram showing the configuration of an embodiment of the remote *holiday system of the present invention. l... Monitoring station, 2... Participating line, 3.
...Terminal device, 4...Telephone, 5...
・・・Monitored station, 6・Track・Separator, 6a, 6b・・・・
...Communication line, 7...Bell incoming detection circuit, 8...
...Minute detection circuit for data, 9...Control circuit, 9a...Control m line.

Claims (1)

[Claims] A monitoring station and a monitored station are connected by a subscriber line, the monitored station is provided with a terminal device and a telephone, and a disconnector is provided between the subscriber line, the terminal device, and the telephone,
When transmitting and receiving data signals between the monitoring station and the monitored station, the monitoring station and the terminal device are connected via the subscriber line, and during a call between the monitoring station and the monitored station, the monitoring station In a remote monitoring system in which a station and the telephone are connected via the subscriber line, a bell incoming detection circuit is connected to the subscriber line and detects a bell incoming signal and issues a first control signal after a predetermined time; a data signal detection circuit that detects the data signal and issues a second control signal when a call is not made; and a data signal detection circuit that is connected to the bell incoming detection circuit and the data signal detection circuit and detects the first or second control signal. , switching the disconnector to connect the monitoring station and the terminal device, and in a state where the first and second control signals are not detected, switching the disconnector to connect the monitoring station and the telephone; A remote monitoring system characterized in that a control circuit to be connected is provided in the monitored station.