JP2574546B2 - Building management system using subscriber telephone line - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a building management system for connecting a control device and a controlled device with a subscriber telephone line.

[0002]

2. Description of the Related Art In recent years, in a building management apparatus using a subscriber telephone line of this type, it has been required to prevent line connection errors and to eliminate control commands from unauthorized apparatuses. A proposal as shown in the 144162 publication has been made. Hereinafter, the configuration will be described with reference to FIG.

As shown in FIG. 1, a control device 100 and a controlled device 101 are connected to a subscriber's telephone switching network 104 via subscriber's telephone lines 102 and 103, respectively. In addition, the unauthorized control device 105 similarly operates the subscriber telephone line 10.
6 is connected.

When the controlled device 101 receives a control command via the telephone line 102, it disconnects the line once and then connects the line to the control device 100. The control command received earlier is transmitted from the control device 100. After confirming that there is, execute the control command.

If the controlled device 101 is an unauthorized control device 10
5, the controlled device 101
Once the line is disconnected after reception, the control device 100
Connect the line to and check the control command. As a result, it is possible to recognize and exclude that the received control command is not from the proper control device 100, thereby preventing unauthorized control or erroneous control.

[0006]

In such a conventional building management apparatus using a subscriber's telephone line, one control apparatus 100 and a plurality of controlled apparatuses 101 are generally combined. Represents each controlled device 101
To connect the telephone line sequentially and send the control command.

When the controlled device 101 that has received the control command attempts to connect the line to the control device 100 again after disconnecting the line once, the control device 100 connects the line to another controlled device 101, There was a problem in that the line was busy and control command confirmation was often delayed or disabled.

A first object of the present invention is to provide a building management apparatus using a subscriber's telephone line in which a controlled device that has received a control command can quickly confirm the control command. And

A second object is to enable the control device to receive a report from the controlled device at any time.

[0010]

A first means for achieving the first object of the present invention is a control command transmitting means connected to a subscriber telephone line and transmitting a control command to the line, Incoming call waiting means which is activated after transmission of the control command and waits for an incoming call to occur after disconnecting the line; and when the incoming call waiting means detects an incoming call, it is activated and inspects and confirms the command received from the subscriber telephone line A control device having a confirmation signal transmitting means for transmitting a signal to a telephone line, and control command receiving means connected to a subscriber telephone line like the control device and receiving a control command via the telephone line. Command storage means for temporarily storing the received control command, callback means activated by the control command receiving means for connecting a telephone line, and then performing line connection to the control device; and A confirmation request means for transmitting a confirmation request command of a control command activated and received after the telephone line is connected by the stage to the telephone line, and a confirmation signal received from the telephone line and held in the command storage means. At least one controlled device provided with a control execution unit for executing a given control command.

Further, a second means for achieving the second object is that the control device is provided with a call-only subscriber telephone line.

[0012]

According to the first operation, the control device transmits a control command, waits for a predetermined period of time after the line is temporarily cut off by the incoming call waiting means. On the other hand, upon receiving the control command, the controlled device once disconnects the line by the callback means and then connects the line to the control device. At this time, since the control device is in the incoming call waiting state as described above,
The line connection from the controlled device to the control device is established without being busy, and the control command can be quickly confirmed and executed.

According to the configuration of the second means, when the controlled device connects a line to the control device in addition to confirming a control signal sent from the control device such as an emergency alert, the control device connects to the telephone line dedicated to incoming of the control device. Therefore, even if the normal telephone line is busy, the control device can send a control command to the controlled device or check the control command from the controlled device. What can be made possible.

[0014]

(Embodiment 1) Hereinafter, a first embodiment of the present invention will be described with reference to FIG.

As shown in the figure, the minimum configuration of the building management device is roughly divided into a subscriber's telephone switching network 1, a control device 2,
And the controlled device 3.

The control device 2 is connected to the first subscriber's telephone line 10 connected to the subscriber's telephone switching network 1, and transmits control commands to the line. Incoming call waiting means 22 for waiting for an incoming call to occur after the line is disconnected
Is activated upon detection of an incoming call, checks a command received from the subscriber's telephone line 10, and includes a confirmation signal transmitting means 23 for transmitting a confirmation signal to the telephone line.

The first controlled device 3 is connected to a second subscriber telephone line 11 connected to the subscriber's telephone switching network 1 like the control device 2, and receives a control command via the telephone line. Control command receiving means 31, a command storage means 32 for temporarily storing received control commands, and a control command receiving means 3
Control device 2 after being activated by 1 and disconnecting the telephone line
Callback means 33 for making a line connection to the destination, confirmation request means 34 for transmitting a confirmation request command of a control command activated and received after the telephone line is connected by the callback means 33 to the telephone line, And a control execution unit 35 for executing the control command held in the command storage unit 32 after receiving the confirmation signal of The unauthorized control device 4 is connected to the subscriber's telephone switching network 1 via the third subscriber's telephone line 12 and the second controlled device 5 is via the fourth subscriber's telephone line 13 respectively.

With the above configuration, in the control device 2, the control command transmitting means 21 transmits the control target device via the first subscriber's telephone line 10, the subscriber's telephone switching network 1, and the second subscriber's telephone line 11. 3. Waiting means 22 after sending a control command to
Is activated, and the activated incoming call waiting means 22 waits for an incoming call for a predetermined time after disconnecting the line once.

On the other hand, in the first controlled device 3, the control command receiving means 31 which has received the control command stores the received control command in the command storage means 32 and activates the callback means 33. After the line is temporarily disconnected, the callback means 33 connects the second subscriber's telephone line 11 with the subscriber's telephone switching network 1.
Then, a line is connected to the control device 2 via the first subscriber's telephone line 10.

At this time, since the control device 2 is in the incoming call waiting state as described above, the line connection from the first controlled device 3 to the control device 2 is established without being busy, and the incoming call waiting means 22 The confirmation signal transmitting means 23 is activated. When the line is established, the callback unit 33 activates the confirmation request unit 34, and the confirmation request unit 34 transmits a confirmation request signal to the control device 2 through the line. Confirmation request means 3 of control device 2
4 receives the confirmation request signal from the first controlled device 3 and, if correct, sends the confirmation signal to the first controlled device 3 through the line.
Send to

When the confirmation request means 34 of the first controlled device 3 receives the confirmation signal from the control device 2, the control execution means 3
The control command stored in the command storage means 32 is passed to 5. The control execution means 35 executes the received control command.

Next, when a control command is transmitted from the unauthorized control device 4 to the first controlled device 4, the controlled device 3 disconnects the line once by the callback means 33 and then connects the line to the control device 2. Is performed, and the control command received by the control command confirmation requesting means 34 is confirmed. Therefore, the control command can be recognized as an irregular control command and erroneous control can be prevented.

As described above, according to the building management system using the subscriber's telephone line of the first embodiment of the present invention, it is possible not only to eliminate control commands from other than a proper control device, but also to control Since the device can promptly confirm the control command, a building management device having an excellent response speed can be submitted at a low cost with a simple configuration.

(Embodiment 2) Next, a second embodiment of the present invention will be described with reference to FIG. The same functional portions as in the first embodiment are assigned the same reference numerals as in the first embodiment, and the detailed description is omitted. As shown in the figure, the building management apparatus using the subscriber telephone line of the second embodiment is different from the building management apparatus using the subscriber telephone line of the first embodiment in that the receiving-only subscriber telephone line 14 used for receiving only is used. In addition, the control unit 2 and the subscriber's telephone switching network 1 are connected by the receiving-only subscriber's telephone line 14.

With the above configuration, when the first controlled device 3 transmits an emergency message or the like to the control device 2 without being based on a control command from the control device 2, the first controlled device 3 uses the first normally used device. The line is connected to the control device 2 via the receiving-only subscriber telephone line 14 instead of the subscriber telephone line 10. At this time, even if the control device 2 is transmitting a control command to another controlled device, for example, the second controlled device 5 and the first subscriber telephone line 10 is in use, the first controlled device A line connection from the device 3 to the control device 2 can be made.

As described above, according to the building management system using the subscriber's telephone line of the second embodiment of the present invention, the emergency notification from the control device 3 to the control device 2 can be promptly and reliably performed.

In the above two embodiments, the subscriber's telephone switching network and the subscriber's telephone line are used. However, for the building management device which manages only a single building, the private line switching network and the private telephone line are used. It goes without saying that this may be done.

[0028]

As is clear from the above embodiments, according to the present invention, control commands from devices other than the normal control device can be eliminated, and the controlled device that has received the control command can quickly confirm the control command. Therefore, a building management apparatus using a subscriber's telephone line having an excellent response speed can be provided at a low cost with a simple configuration.

Further, it is possible to provide a building management apparatus using a subscriber telephone line, which is capable of promptly and surely making an emergency call from the control device to the control device and which has a high security effect.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a building management apparatus using a subscriber telephone line according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a building management apparatus using a subscriber telephone line according to the second embodiment.

FIG. 3 is a block diagram showing a configuration of a building management apparatus using a conventional subscriber telephone line.

[Explanation of symbols]

 2 Control device 10 First subscriber telephone line 11 Second subscriber telephone line 12 Third subscriber telephone line 13 Fourth subscriber telephone line 14 Incoming-only subscriber telephone line 21 Control command transmitting means 22 Incoming call waiting Means 23 Confirmation signal transmission means 31 Control command reception means 32 Command storage means 33 Callback means 34 Confirmation request means 35 Control execution means

Claims (2)

(57) [Claims] 1. A control command transmitting means connected to a subscriber's telephone line and transmitting a control command to the line, and a signal waiting to be started after transmitting the control command and waiting for an incoming call after disconnecting the line. Control means comprising: means for confirming a command received from a subscriber's telephone line which is activated when the incoming call waiting means detects an incoming call, and a confirmation signal transmitting means for transmitting a confirmation signal to the telephone line; The control command receiving means is connected to the subscriber's telephone line in the same manner as that described above, receives control commands via the telephone line, command storage means for temporarily storing the received control commands, and is activated by the control command receiving means. Callback means for making a line connection to the control device after disconnecting the telephone line, and confirming the control command started and received after the telephone line is connected by the callback means. At least one of a plurality of receiving units provided with a confirmation request unit for transmitting a request command to a telephone line and a control execution unit for executing a control command stored in the command storage unit after receiving a confirmation signal from the telephone line. A building management device using a subscriber telephone line composed of a control device. 2. The building management apparatus according to claim 1, wherein the incoming call-only subscriber telephone line is provided in the control device.