KR950003728B1 - Remote control system by use of telephone lines - Google Patents

Abstract

The circuit includes a call incoming signal generating part for generating a call incoming signal to a caller in order to pretend the call is not income while a remote controlling device determines if the the call is an external call or a control command from the controller; a relay control part for blocking a line of an automatic answering machine and general telephone connected to a back end during the operation of the remote controlling device; a telephone power supplying part for supplying DC voltage applied from a central office to the automatical answering machine; a ring signal generating part for supplying a ring signal to the automatic answering machine or telephone when it is determined the mode is not the remote control mode; a communication line sensing part for sensing if the hook of the answering machine or telephone is turned on; and a relay part for connecting or dividing the output terminal of the telephone power supplying part by driving a relay according to the control signal of the relay controlling part.

Description

Remote control circuit using telephone line and method thereof

1 is a combination configuration of a conventional remote controller and a telephone.

2 is a remote control circuit diagram using the telephone line of the present invention.

3 is a detailed circuit diagram of FIG.

4 is a flowchart of a remote control method using the telephone line of the present invention.

* Explanation of symbols for main parts of the drawings

51 ring tone generator 52: relay control unit

53 ring signal generator 54: telephone power feed unit

55: call line detection unit 56: relay unit

The present invention relates to the simultaneous use of a remote control device and an answering machine using a telephone, and particularly when using a remote control device and an answering machine having a function of controlling and monitoring a home appliance using a telephone simultaneously on a common line. The present invention relates to a remote control circuit and a method using a telephone line suitable for discriminating a signal to be made and for accurately selecting a device.

Commonly used remote control devices, answering machines, and general telephones are combined in the configuration as shown in FIG. 1 to share a mutual telephone trunk line, where the configuration of the remote control device 8 is connected to the switching line when there is an incoming call. Off-hook control unit 1 for receiving, a remote controller and a call and data processing unit 2 for message transmission and data processing, and an incoming call detection unit 3 for monitoring whether an incoming call is received, and control of each unit and A microcomputer 4 which oversees data processing, an I / O interface unit 5 which connects the data processed by the microcomputer 4 to a control target device, and a control target device that is moved according to a controller's command by output data. 6, and an answering machine and a regular telephone 7 connected in parallel with telephone lines.

The operation of the remote control apparatus and the connection configuration of the telephone using the general telephone line will be described in detail as follows.

First, in FIG. 1, when the controller makes a phone call to control the home appliance 6 from a remote location, the incoming call detection unit 3 detects an incoming call and informs the microcomputer 4 of the incoming call, which is off-hook. The control unit 1 commands the off-hook to connect the trunk line to the call and data processing unit 2 to exchange messages with the controller.

The data exchanged with the controller is interpreted by the microcomputer 4 to control the I / O interface 5, and the I / O interface 5 is connected to the corresponding channel according to the control command from the microcomputer 4. The connected controlled device 6 is controlled.

In addition, the answering machine (7) connected in parallel to the telephone line is automatically off-hook when there are three incoming calls, where the two devices, the remote control device (8) and the answering machine (7) go out at the same time. The problem occurs when you use the function.

That is, the answering machine (7) is usually off-hook after three rings, and the remote control device (8) is off-hook after one ring. When simultaneous use of (7, 8) and the outgoing function are operated, the answering machine 7 cannot operate because the remote control device 8 first receives a call from the outside.

Further, even if the remote control device 8 sets the off-hook time longer than the answering machine 7 receives, the answering machine 7 first receives and controls the control even when the controller calls for control. Will not be able to.

In addition, even in a home that does not use the answering machine 7, if the remote control device 8 is operated and not released after returning home, the remote control device 8 may not recognize the incoming call when the phone rings once. There is.

Accordingly, the present invention is to determine whether the signal input from the outside is a remote control signal or a general telephone in order to solve various problems caused by the conventional remote control device and the telephone is connected to a common telephone line as described above. In order to provide a means for selectively controlling or answering the call accordingly, the present invention is described in detail as follows.

2 is a circuit diagram of the present invention for solving the problems caused by the irrational operation between the existing remote control device and the telephone as described above, wherein the off-hook control unit 1 for connecting with the telephone line when there is an incoming call, Call and data processing unit (2) for remote controller and message transmission and data processing, incoming call detection unit (3) for monitoring incoming calls, micom (4) for overall control and data processing, and The I / O interface unit 5 for connecting the data processed by the microcomputer 4 to the control target device, and the control target device 6 operating according to the controller's command by the output data, The hardware configuration is basically the same as that of the remote control device 8.

However, the circuit added by the present invention sends a ringing tone to an external telephone that another person dials while the remote control device 8 determines whether it is an external telephone or a control command from the controller. A ringing tone generator 51 for disabling, a relay controller 52 for blocking a line of an answering machine and a regular telephone 7 connected to the rear end while the remote control device 8 is operating, and a rear end It supplies the ring signal to the telephone power feed unit 54 which makes DC voltage sent from the telephone station to the answering machine 7 of the telephone station, and to the answering machine and the general telephone 7 of the following stage when it is determined that the remote control mode is not. Ring signal generator 53, a telephone line detector 55 for monitoring whether the answering machine and the general telephone 7 are off-hook, and the relay controller 52 And a relay unit 56 which drives a relay in accordance with a control signal from the terminal and connects or disconnects an output terminal from the telephone power feed unit 54 to a trunk line.

The operation and effect of the combined circuit of the remote control apparatus and the answering machine of the present invention configured as described above will be described in detail based on the control flowchart of FIG.

First, when a call is received, the remote control device 8 off-hooks to determine whether the incoming call is a call for remote control or an answering phone.

Here, the method of determining the remote control and the telephone is that the remote control device 8 transmits a click sound “삑” while making an off-hook to inform the controller that the remote control device 8 is operating and control for 2 seconds from this time. The user waits for a control signal input by pressing a number key of his / her phone. At this time, when a general person who is not a controller makes a call, the remote control device 8 transmits a ringing tone to be recognized by the general person who is calling.

In addition, while the remote control apparatus 8 is off-hook, the telephone line and the answering machine 7 which are connected to the rear end through the relay part 56 are cut off. If the control signal is received within 2 seconds after the click sound is sent out, the remote control mode is entered, and the normal telephone and answering machine (7) of the rear end is blocked until the control is completed. Connect.

If there is no control input within 2 seconds, it is judged as a mobile phone and the bell signal is made and supplied by the remote controller 8 so that the general telephone and the answering machine 7 can operate.

In general, the answering machine 7 is supposed to answer calls automatically after three rings.

At the same time as the bell rings, the rear end monitors the call line and when the rear end is off-hook, the rear end is connected to the trunk line so that the caller can talk with the other party, and the remote control device 8 is off-hook to enter the standby state.

If the answering machine and the ordinary telephone (7) at the back end do not hook off more than 10 rings, the answering machine is not set out or the call is not answered. -Hook to enter standby.

On the other hand, the process of performing this for the basic operation of the present invention as described above will be described based on the circuit diagram of FIG.

When a call is received, the incoming call detection unit 3 detects an incoming call and informs the microcomputer 4 of the incoming call, and the microcomputer 4 inputs this signal to give an off-hook command to the off-hook control unit 1 to establish a trunk line. At the same time, the transistor Q3 of the relay control unit 52 is turned on to drive the relay RLY1, thereby disconnecting the contacts of the relay switches S1 and S2, cutting off the rear end, and connecting another contact S3 to the rear end. Couples the telephone and answering machine 7 to the telephone power feed unit 54.

In addition, the transistor Q4 connected to the output port PO3 is turned on. When the transistor Q4 is turned on, the transistor Q1 of the collector terminal is turned on, and the auto response is performed through the transformer T2. DC voltage is supplied to the telephone and ordinary telephone (7).

On the other hand, the ring tone generating unit 51 is operated through the transistor Q2 connected to another output port PO4 to send the ring tone to the other party. At this time, the output port PO4 of the microcomputer 4 is turned low. At the moment, a trigger signal is applied to the timer IC to generate a click sound that "bounces" by a predetermined time constant.

The click sound and the ring tone are applied to the secondary side of the coupling transformer T1 for the call through the resistors R1 and R2 and transmitted to the other party.

In this state, when the control signal, i.e., DTMF (Dual Tone Multi Frequency) generated by the controller presses a numeric key, enters the remote control mode and outputs the microcomputer 4 to stop the ringing tone that has been transmitted. Inverts the port PO4 with a high signal.

When the above control operation is completed, the microcomputer 4 outputs a low signal to the output port PO3 to stop the power feed to the subsequent answering machine and the general telephone 7, and another output port PO5. ), The relay unit 56 is released, the rear end 7 is connected, and the off-hook control unit 1 is on-hook through the output port PO0 and returned to the standby state.

If no control signal is received within 2 seconds, it is recognized as a call from another person and enters the normal phone mode.

First, the microcomputer 4 outputs a high control signal to its output port PO2 to operate the oscillator 33. At this time, the oscillation frequency is about 0.5 Hz and the resistors R4 and R10 connected to the periphery thereof are connected. It is determined by the value of the capacitor C2.

When the oscillator 33 outputs a high signal, the ring oscillator 34 at 20 Hz is operated. When the oscillator 33 outputs a low signal, the ring oscillator 34 stops the operation so that the telephone ring has a constant interval. Will ring.

The output of the ring oscillator 34 is superimposed on the power feed via a transformer T2 to cause the telephone ring of the telephone 7 at the rear end to ring.

On the other hand, while sending a ring signal, it is detected whether the telephone 7 of the rear end is off-hook. When the rear end 7 is off-hook, a voltage drop occurs in the resistor R17 and a photo-coupler (R7) through the resistor R7. PC1) detects this.

When the telephone 7 of the rear stage is off-hook, the input light emitting diode PD1 of the photo-coupler PC1 is turned on, and thus the phototransistor PT1 is turned on so that the telephone 7 is turned off by the micom 4. -Transfer the hooked to the microcomputer (4).

When the telephone 7 is off-hook, the ringing tone sent to the other party is stopped by making the output port PO4 high, and the output port PO3 is made low to stop the power supply to the telephone 7, and then the output port. By making PO5 low, the trunk line is connected to the telephone 7 on the rear end through the relay unit 56, and the remote control device 8 returns to the standby state.

If the bell rings more than 10 times and then does not off-hook from the telephone 7 at the rear end, the rear end similarly stops supplying power to the telephone 7 and connects the rear end 7 and then the remote control device 8 turns on. Hook and return to standby.

Therefore, even if the remote control device and the answering machine are set to go out at the same time, calls from others and calls made by the remote controller can be used without interference.

As described above, the present invention makes it possible to selectively use a remote controller commonly connected to a telephone line and a device designated for a telephone period.

Claims (2)

Ringing tone generator 51 for sending a ringing tone to an external telephone side dialed by another while the remote control device 8 determines whether it is an external phone or a control command from a controller after receiving a call. ), A relay control unit 52 that cuts off the lines of the answering machine and the regular telephone 7 connected to the rear end while the remote control device 8 is operating, and the answering machine 7 of the rear end at the telephone station. A telephone power feed unit 54 for making a DC voltage to be sent, a ring signal generator 53 for supplying a ring signal back to the answering machine and the general telephone 7 at a later stage when it is determined that the remote control mode is not included; A call line detector 55 for monitoring whether the answering machine and the general telephone 7 are off-hook, and driving a relay in accordance with a control signal from the relay controller 52 And a relay unit (56) for connecting or disconnecting the output terminal from the telephone power feed unit (54) to a trunk line. When there is an incoming call, the remote controller is operated and at the same time, it is off-hook to send a ring tone and a click sound.If a control key is input within a certain time, the ring tone is stopped and the remote control mode is entered to stop the ring tone and operate the remote controller. If the control key is not input within a certain period of time, the phone enters the normal mode and generates a ring signal to the phone. When the phone is off-hooked, the call is started and the ringing tone is stopped. Both the remote control mode and the normal mode operation are performed. When on-hook and waiting for the next incoming call remote control method using a telephone line.