KR20020027813A - Public switched telephone network(PSTN) using a power-supply provided by telephone office and a method therefor - Google Patents

Abstract

PURPOSE: A public telephone using station power and a method for controlling the same are provided to previously prevent a wrong operation and an electric shock accident, due to the unstableness of power, by using station power supplied from a telephone office through the telephone line as the driving power of a public telephone and executing various functions of the public telephone. CONSTITUTION: A public telephone using station power comprises a power signal part(10) and a main control part(70). The power signal part(10), separating a signal and power supplied from a station line, is comprised of a constant voltage circuit part(11) and a battery. The constant voltage circuit part, generating signal separation and constant voltage, converts station power into constant voltage and supplies it to each component. The battery is always charged in case that the voltage of the constant voltage circuit part is lower than station power. In case that station power is not sufficient for each component, the battery is used as supplementary voltage. The main control part(70) controls a voice call circuit part(30), a DTMF generation part(40), a voice message generation part(50), a modem communication circuit part(60), a card reader part(80), and an LCD(90).

Description

Public switched telephone network (PSTN) using a power-supply provided by telephone office and a method therefor}

The present invention relates to a public telephone using a national power supply and a control method thereof, and more particularly, to a public telephone using a national power supply and a method for controlling the public telephone using a national power supplied from a telephone station through a telephone line. It is about.

In general, public telephones use AC, which is a commercial power source, as a driving power source.If the power situation is not good depending on the installation area, problems such as malfunction due to power instability, electric shock, and damage to the device when lightning strikes the commercial power source There was this.

In addition, although public telephones using a stationary power have been used for a long time, the stationary power supply is supplied with a small current through a telephone line, so that a circuit capable of making a simple call in a circuit having a high power consumption configuration, a liquid crystal display, There was a problem that you can not read and write cards and use data communication reports.

Accordingly, an object of the present invention is to provide a power supply by performing various functions of a voice call and a public telephone while simultaneously using a small current supplying power supply from a telephone station through a telephone line as a driving power for a public telephone in view of such a conventional problem. The present invention provides a public telephone and a control method using a class power source that can prevent power failure and electric shock due to instability, improve communication reliability, and make power saving effect by consisting of components that operate at low power in the internal circuit. .

The object of the present invention is a ring generating unit for ringing the ring receiving the ring signal through the station line while using a station-class power source as a driving power, and a voice call circuit unit for receiving a voice signal from the station line to make a voice call; DMT F generating unit for detecting DTP presses from the keypad to generate DFM, card reader unit for reading and writing a phone card, and magnet card card for generating handset, voice message generating unit for generating guidance message And a public telephone having a modem communication circuit unit for modem communication, comprising: a power signal unit for separating a signal from a power source supplied from a station class line; a constant voltage circuit unit for converting the station class power source to a constant voltage and supplying each driver unit; Compare the voltage of the circuit part with the class power, and always charge without a separate switch if the voltage is lower than the class power. And control the battery used as a supplementary voltage when the voltage required for the driving unit is insufficient as a national power supply, the voice call circuit unit, the DMP generation unit, the voice message generation unit, the modem communication circuit unit, the card reader unit and the liquid crystal display unit. It can be achieved by configuring a payphone as the main control unit.

1 is a block diagram showing the configuration for the implementation of a public telephone using a national power supply according to the present invention

Figure 2 is a detailed block diagram of the intelligent power control unit of the present invention

3 is a flow chart according to the station-class power supply of the present invention

Explanation of symbols on the main parts of the drawings

10: power signal unit 11: constant voltage circuit unit

12: battery 20: ring generating unit

30: voice call circuit unit 40: DFM generator

50: voice message generator 60: modem communication circuit

70: main controller 80: card reader

90: liquid crystal display

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

1 is a block diagram showing a configuration for the implementation of a public telephone using a stationary power supply according to the present invention, Figure 2 is a detailed block diagram of the intelligent power control unit of the present invention, Figure 3 is a flow chart according to the stationary power supply of the present invention. .

1 is a block diagram showing a configuration for implementing a public telephone using a power supply according to the present invention. First, the power signal unit 10 is a constant voltage circuit unit for generating signal separation and constant voltage for voice signal and data communication. (11) and a battery (12) for replenishing the working voltage.

And signal separation is composed of a communication circuit and the modem communication unit 60 for data communication connected during the voice call.

The voice call circuit 30 is composed of a call signal circuit for shaping and amplifying a voice signal.

The modem communication unit 60 includes a connection unit for connecting the power signal unit 10 to the modem communication unit 60, a modulation demodulation unit for demodulating and demodulating various data signals, and a control unit for controlling the signal.

The intelligent power signal unit 10 is configured to control the power of each part in order to minimize the power consumption.

The power signal unit 10 turns the power generated by the constant voltage circuit unit 11 on and off for each driving unit. Each driving unit is connected to a switch unit serving as a switch in the power supply stage, and the power source before the operation unit operates. It operates by switching on, so it minimizes the power consumed during standby in other operating parts. The voltage generated by the power signal unit 10 in the domestic line is compared with the battery 12 voltage to discharge and charge according to the operating conditions. Continue.

For example, the part that consumes more than the power generated from the station-class power is replenished from the battery 12 voltage during operation, and the operation of continuously charging the battery in the operation where the voltage is consumed less.

In order to operate very little, it is composed mainly of parts that consume little power, and secondly, it is based on the configuration that operates with very little power by partial power application operation.

The main control unit 70 controls all of the public telephones, and in particular, the intelligent power control cuts off the power when the telephone handset is hooked on and does not operate at all. Start to control the power.

The input / output means directly controls the main controller 70 to output characters to the liquid crystal display, and to output voice messages to the handset. After inserting the card into the card reader, the card is judged to be a normal card and the number corresponds to the telephone number on the keypad. It consists of a keypad and card reader connection for inputting keys and function keys.

In addition, the DFM generator 40 transmits and receives the voice signal generator and generates a guide message according to a control signal generated from the control means, when the user raises a public telephone handset or a number key signal corresponding to a telephone number on the keypad of the input / output means. Is converted into a DMP code to transmit / receive the call circuit unit.

Referring to Figures 1 to 3 the operation of the public telephone and the control method using a station-class power supply according to the present invention configured as described above are as follows.

First, the normal state of the public telephone is a state in which the driving power of each component such as the liquid crystal display and the control unit including the main control unit 70 is cut off, so that no current is consumed, and a current of several microseconds is applied. Detecting ring input state.

When the off-hook is picked up by the telephone handset, the main control line 70 is operated while the power supply line is connected to the station class line.

The main control unit 70 detects whether the off-hook state is a state in which an incoming signal (ring signal) is input to receive a telephone or a state in which a handset is normally used to use a public telephone.

When the ring signal is input, it detects the ring detection signal to operate the phone to the incoming state. First, it connects the class line and the power signal unit to the call network to enable voice communication.

If the ring signal is not detected, the voice message generator 50 sends a voice message, which is a basic operation, to the handset and waits for card and function key input.

When the card is input to the card reader unit 80, it is checked whether it is an integrated circuit card, reads and writes the integrated circuit card, and displays a message on the liquid crystal display unit 90 to remove the magnet card. The voice is sent to the handset through the unit 50.

If you want to make a free call with a function key before the card is input, the station line is connected to the voice call network circuit and it operates in the normal call state of the phone.

When a call is made through the integrated circuit card, the call is started while the card is read and the amount is displayed on the liquid crystal display unit 90. The call continues while the set amount is reduced.

At this time, the time to reduce the amount is reduced to the amount set by the number entered on the keypad, and as time passes, the next time is reduced when the signal received to reduce the amount from the telephone station connected to the station line.

When the above operation is described in detail, when the handset is lifted, the off-hook signal and the station power are applied to the telephone, and the main control unit 70 and the telephone operating unit are supplied with power.

The main controller 70 detects each operation unit in a state where power is applied and performs intelligent power operation.

When the integrated circuit card is input to the card reader unit 80, the main control unit 70 turns on the switch for applying power to the card reader unit 80 to communicate with the card to apply power.

When the power is applied, the power is applied to the card to communicate with the main control unit 70 to read the amount of money stored in the card to display the amount on the liquid crystal display unit 90, and connect the power signal unit 10 to the call network circuit. After making a call and checking the signal input from the keypad to the main control unit 70, the power of the DFM generator 40 is turned on to drive the DFM generator 40 and then the main control unit 70. ) Generates DTM by signal.

DMP is applied to the station line via the power signal unit 10 through the communication network circuit.

At this time, the input telephone number is stored in the main control unit 70 to reduce the corresponding amount by distinguishing the short distance and the long distance.

When you reduce the amount of money, when the other party picks up the phone, the telephone exchange tells you to reduce the amount.

Subsequent reductions in amount over time shall be deducted when the telephone exchange exchange detects that the amount is to be reduced.

At this time, if the card is removed or on-hook, the phone operates to stop all the operations in this state. Break the line to enter standby mode.

In particular, in order to perform the above operation, the intelligent power signal unit 10 not only minimizes power consumption by controlling the power of each part, but also consumes the power of the local power supply and the battery 12 which are minute currents. It can be used to match the power, and the remaining power of the class power supply keeps the battery charged.

That is, the power signal unit 10 turns on and off the power generated by the constant voltage circuit unit 11 for each driving unit, and each driving unit is connected to a switch part serving as a switch at the power supply terminal. All power switches are turned on to operate the power in standby by minimizing the power consumption during standby in other operating parts.The voltage generated by the power signal part in the domestic line is compared with the battery (12) voltage. Continue discharging and charging accordingly.

For example, when the part that consumes more than the power generated by the mains power is in operation, the battery (12) voltage is used to supplement the current, and the remaining current when the power is consumed less than the power supplied by the telephone line. Keeps charging the battery.

In addition, in the present invention, when a part used externally is checked as a failure, a failure indication is displayed on the liquid crystal display unit 90 when the off-hook is performed, thereby automatically reporting.

If the failure reporting procedure is explained in detail, when the handset of the telephone is off-hook after use, power is supplied to the controller of the telephone to operate each operation part to check the normal operation.

If the card reader unit 80, the keypad, the modem, the memory, etc. of the respective operating parts are found to be faulty, the fault indication is displayed on the liquid crystal display unit 90, and the number of faults is checked. Automatically connect the line and report to the public telephone management center automatically.

If the above-mentioned fault is confirmed to be off-hook, the telephone is connected to the telephone line at the time of on-hook and reports to the public telephone management center that the fault is returned.

In the present invention, the method of controlling each part in the main controller 70 uses a conventional technique as a parallel processing method of connecting the address and the data, but the parts used here are the parts that use low power consumption. It is designed to use less.

As described above, the present invention converts the station-class power supplied from the class line into a constant voltage that can be used and supplies it to each driving unit, and compares the voltage of the class-class power source with the battery and always charges without a separate switch when the voltage of the battery is low. After that, if the voltage required by the driver is not enough for the national power supply, the battery can be replenished with the voltage of the battery to start the multifunction public telephone based on the national power supply, as well as to prevent malfunction and electric shock due to power instability. It is possible to prevent the damage and to increase the reliability of the communication.

Claims (4)

A ring generating unit for receiving a ring signal through the station line while ringing the station, and a voice call circuit unit for receiving a voice signal from the station line and making a voice call; Detmp FM generator for detecting and generating DFM, card reader unit for reading and writing phone card, reading card card, voice message generator for generating guidance message by handset, modem for modem communication In a public telephone having a communication circuit unit, A power signal unit for separating a signal from the power supplied from a national class line, A constant voltage circuit unit for converting a station-class power supply into a constant voltage and supplying it to each drive unit; The battery is used as a supplementary voltage when the voltage of the constant voltage circuit unit is compared with the class power, and is always charged without a separate switch when the voltage is lower than the class power, and when the voltage required for the driving unit is insufficient as the class power. And a main control unit for controlling the voice call circuit unit, the DMP generation unit, the voice message generation unit, the modem communication circuit unit, the card reader unit, and the liquid crystal display unit. The method according to claim 1, And said modem communication circuit unit automatically connects a checked fault when off-hook the handset of the telephone to the public telephone management center at the time of on-hook, and reports the failure status. In the control method of the public telephone using the class power as the driving power, When the voltage of the battery becomes low voltage below the national power supply, the regular charging step of operating the public telephone and always charging the battery with the remaining voltage, A signal separation step of separating a ring signal and a voice signal from a power signal unit to enable a call as well as an incoming call; Inquiring whether various cards are valid through the modem communication circuit unit; Checking whether there is a failure of each drive unit in the signal standby state and reporting the failure state to the management center when on hook, characterized in that the control method of the public telephone using the power supply. The method according to claim 3, The power signal unit is connected to the switch portion that acts as a switch in the power stage for each drive unit for the voltage generated in the constant voltage circuit unit to enable the power switch to be turned on before operating the operation unit, the other operation portion when waiting The method of controlling a public telephone using a national power supply, characterized by minimizing the power consumption, and the voltage generated by the power signal part in the national power line is compared with the battery voltage to continuously charge the remaining current of the national power supply to the battery.