KR970003984B1 - Long-distance phone control method - Google Patents

Abstract

An automatic control method for the 700 exchange number and the long distance calling whereby the calling of the 700 exchange number, the long distance and the international is enabled to input the password. The method is used to connect with the electronic telelphone using the dual tone multi frequency (DTMF) type.

Description

700 station and long distance automatic control method

1 is a block diagram showing a schematic configuration of the present invention.

2 is a circuit diagram showing an embodiment of the present invention in detail.

3 is a flowchart showing an operating state of the present invention.

* Description of the symbols for the main parts of the drawings *

4: GPS receiver 5: first storage means

6: second storage means 7: comparison unit

[Name of invention]

[Technical Field and Technical Challenges to be Invented]

The present invention relates to an automatic control method for 700 stations and a long distance telephone, and in particular, international and long distance using a long distance automatic telephone without a separate power supply while being connected to an electronic telephone employing a DTMF (Dual Tone Multi Frequency) method. The present invention relates to a 700 station and a long-distance call automatic control method to prevent unauthorized calls from 700 stations.

Nowadays, due to the development of wired and wireless communication, it is possible to call quickly and conveniently even in remote areas, and it is possible to make transportation, living information and health consultation by phone at any time using 700 stations.

In addition, since most long distance telephones are expensive in proportion to distance, and the cost of telephone counseling using 700 stations is much higher than that of general telephone calls, it is necessary to appropriately adjust the state of the call accordingly.

What's more, telephones installed in homes, offices, or business locations can be burdened with unreasonable calls.

Accordingly, the present invention is a long-distance call with 700 and long-distance to prevent unauthorized calls by making long-distance calls and international calls and calls of 700 countries except the close area to which the city rates apply, so that calls are made only when the password is correctly pressed. It is an object of the present invention to provide an automatic control method.

Another object of the present invention is to provide an automatic control method for 700 stations and long distance telephones, which can be inputted by changing a password again and inputting not only a directly connected telephone but also an external telephone.

[Technical problem to be achieved]

In order to achieve the above object, the present invention provides a line rectifying unit which is connected to both sides of an internal telephone and an external telephone line at the same time, and converts the input signal into a direct current, and converts the signal into a direct current. A line control unit for shaping a component or turning on / off a line, a DTMF unit for converting a dial signal of an MFC (Multi Frequency Code) input through the line rectifying unit to a hexadecimal number, and transmitting it to a microprocessor, and the line rectifying unit A pulse detector which detects an input pulse signal and transmits it to be recognized by a microprocessor, a microprocessor that receives signals from the DTMF unit and a pulse detector and controls overall operations of the internal processor, a password under control of the microprocessor, Save and print data such as area code to be released Is composed of a nonvolatile memory, an oscillation driver for amplifying and outputting an oscillation sound output from the microprocessor, and a reset unit for inputting a reset signal to the microprocessor when the voltage flowing through the line controller is normal. Measuring a dial if a normal signal is flowing through the line, checking whether the dial is a dial capable of a call such as 012, 015, 080, or a local station number in the city, and enabling a call; Verifying that the dial is a password so that long distance, international and 700 countries can be called if the password is a password; and if the dial is a dial for inputting a password, a two to four digit password is inputted. And the out-of-town area where the call can be made unless the dial is a password input. A password by receiving and storing a call, and by performing steps such that the call is not made if the dial is not a password and is “00 ×”, “0 ×××”, or “700”. It is possible to prevent unauthorized calls by making a call only when the user presses the button correctly, change the password again, and input the call.

[Configuration and Function of Invention]

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 shows a schematic configuration, in which both sides are simultaneously connected to an internal telephone line TIP and an external telephone line L1 and L2, and a line rectifying unit 1 converts an input signal into a direct current by radio wave shaping. A line control unit 2 for shaping a signal input through the line rectifying unit 1 to a component of DC 5V or turning a line on / off, and a dial signal of an MFC input through the line rectifying unit 1 to 16; A DTMF unit 4 for converting a binary number to a microprocessor 3, a pulse detector 5 for detecting a pulse signal input through the line rectifying unit 1 and recognizing it in the microprocessor 3; The microprocessor 3 receives the signals from the DTMF unit 4 and the pulse detector 5 to control the overall operation of the internal memory, and a password, an area code released under the control of the microprocessor 3, and the like. Having The non-volatile memory 6 storing and outputting the other, the oscillation driver 7 for amplifying and outputting the oscillation sound output from the microprocessor 3, and the voltage flowing through the line control unit 2 are normal. At this time, the microprocessor 3 is composed of reset units 8 for inputting a reset signal.

Fig. 2 shows a detailed configuration according to the embodiment, and the signal input from the bridge diode 1a of the line rectifying section 1 connected at both sides to the telephone line TIP inside and the telephone line L1,2 inside at the same time. Is converted into a direct current and converted into a direct current, and the direct current signal inputted through the bridge diode (1a) is a resistor (R1), a constant voltage diode (ZD1), a diode (D1), and a capacitor (C1) of the line control unit (2). When the transistor Q1 is turned on by the microprocessor 3 or shaped into a component of DC 5V by the C2 and C3 or input to the DTMF unit 4, the resistors R2 and R3 and C4 And selectively turn off the line of the trunk line transmitted to the DTMF unit 4 through the transistor Q2, and the dial signal of the MFC input through the bridge diode 1a of the line rectifying unit 1 is a DTMF unit ( The microprocessor converts the hexadecimal number via the DTMF IC 4a of 4). The pulse signal transmitted to (3) and input through the bridge diode 1a is detected by the capacitor C5 and the resistor R4 of the pulse detector 5 and transmitted to be recognized by the microprocessor 3. The microprocessor 3 of the single chip which receives the signals from the DTMF unit 4 and the pulse detector unit 5 and controls the overall operation of the internal memory transmits data such as a password and a region number to be released to the nonvolatile memory 6. The oscillation sound signal output from the microprocessor 3 is amplified and output by the transistor Q3, the resistors R5, R6, and the capacitor C6 of the oscillation driver 7, and the line When the voltage flowing through the control unit 2 is normal, the reset IC 8a of the reset unit 8 causes the reset signal to be input to the microprocessor 3 described above.

The operation process of the 700 station and the long distance automatic control method of the present invention configured as described above will be described with reference to FIG.

When the microprocessor 3 recognizes that the normal signal is flowing through the line rectifying unit 1 (step 11), the dial signal is converted into hexadecimal through the DTMF unit 4 and inputted. Measure (step 12).

The microprocessor 3, which recognizes the dial signal, checks whether the dial is a dial such as 012, 015, 080 or a local station number capable of a call stored in the nonvolatile memory 6 (step 13). "L" is outputted to the transistor Q1 of (2) so that the line can be kept on by the line control unit 2 so that a call can be made (step 14).

If it is not correct in step 13, it is checked whether the above dial is a password (step 15), and if it is a password, the line control unit 2 keeps the line on while making intercommunication with international and 700 countries possible. (Step 16).

If it is not a password in step 15, check whether it is a dial for entering a local area code (step 17), and if it is a dial for entering a local area code for a call where a dial of "#" is entered in the 15th, Thereafter, the input " 0 "

If the dial in step 17 is not a dial for inputting a local area code for which a call can be made, confirm that the dial is for dialing a password (step 19). If the dials of “*, #, *, #” are input again after the input, the 2 to 4 digit dials to be input are recognized as the password and stored in the nonvolatile memory 6 (step 20).

The microprocessor 3 recognizes that the dial is not a password, is not a dial for inputting a local area code where a call is possible, and is not a dial for input of a password. If it is "00x", "0xxx", or "700" (step 21), "H" is output to transistor Q1 of the line control unit 2 and turned on to turn off the transistor Q2 while the line control unit 2 To keep the line off, so that the call is not made (step 22).

[Effects of the Invention]

Therefore, according to the 700 station and the automatic long-distance call control method of the present invention, the input signal connected to the line and the telephone line of the telephone is converted into a direct current by the line rectifier, and then the line controller is shaped into a component of DC 5V or the line is turned on / off. In the microprocessor which turns off the signal and transmits the input MFC signal from the DTMF unit to the microprocessor, the pulse signal is detected and transmitted by the pulse detection unit, and the microprocessor stores data such as the password and the area code to be released in the nonvolatile memory. The output oscillation sound is configured to be amplified by the oscillation driver and output.However, if a normal signal flows through the line, the dial is measured to check whether the dial is available for a call, a password, and a password input. And check if the area code is available Prevent calls from unauthorized calls by allowing calls to be made or by following steps to prevent calls if they are “00 ×”, “0 ×××”, or “700”. You can change the password, enter it again, and enter it from an external phone as well as a directly connected phone.

Claims (1)

700 and long-distance telephones that measure incoming dial signals, check that the dial is a dial capable of making a call, and if the dial is a password, allow long distance, international and 700 calls to be made. In the automatic control method, if the dial is not an area code, it is checked whether it is a dial for inputting an area code outside of the suburbs, and if the dial of "#" is input at the 15th time, then "0 ×××” to be input later. Recognizing as a local area code available to call and storing in the non-volatile memory (6), after confirming that the dial is a dial for password input, the dial of "#" is entered at the 15th time. When the dials of “*, #, *, #” are input again, a step of recognizing and storing the dial of 2 to 4 digits, which is entered later, is stored, and the dial is “00 ×”, 0 ××× "," 70 "if the line is how station 700 and long distance call, characterized by automatic control performed by the steps of: prevent the call is made to ensure that the off-state is maintained.