KR0145791B1 - Direct phone control method - Google Patents

Abstract

SUMMARY OF THE INVENTION The present invention provides a method for selectively blocking long-distance direct dialing for a fixed device as well as a portable device in a wired or wireless telephone. The method according to the present invention provides that a portable device or a fixed device is hooked off. If it is, turn on the telephone loop and check if the DDD blocking mode is set for the wired or wireless telephone. As a result of the check, when the DDD blocking mode is set, it is checked whether there is dial information input through the device set to the hook-off state, and when the dial information is input, the first dial number is '0'. Analyze As a result, when the first dial number is '0', it is recognized as a long-distance direct telephone call and controls to generate a warning tone through the device set to hook-off and turn off the telephone loop. Therefore, when the DDD blocking mode is set, it is possible to block not only a portable device but also a long-distance direct telephone call using a fixed device.

Description

Blocking long distance direct dialing in wired and wireless telephones

1 is a block diagram of a fixture of a wired or wireless telephone for carrying out the method according to the invention,

2 is a flowchart illustrating a method for blocking a long distance direct-dial call according to the present invention.

* Explanation of symbols for main parts of the drawings

10: key input unit 20: microcomputer

30: hook state detection unit 35: RF transceiver

40: Warning tone generating part 50: Speaker

60: DTMF (Dual-Tone Multi-Frequency) Generator

70: call circuit part 70a: loop control circuit

70b: network circuit

The present invention relates to a method for selectively blocking the transmission of a direct distance dialing (hereinafter, referred to as DDD) of a wired / wireless telephone. Particularly, the present invention provides a method of selectively selecting DDD transmission for a fixed device as well as a portable device of a wired / wireless telephone. The present invention relates to a long distance direct telephone call blocking method in a wired / wireless telephone implemented to be blocked.

In general, the DDD call blocking function is an additional service of a telephone provided to prevent an increase in telephone charges due to an unspecified number of arbitrary DDDs. The DDD call blocking function implemented in a typical typical wired and wireless telephone is implemented to block DDD call only for a portable device. Therefore, even if a mode for blocking DDD transmission was set, DDD transmission was still possible using a fixed device.

The present invention has been made in view of the above-described problem, and an object thereof is to provide a long-distance direct telephone call blocking method in a wired / wireless telephone that can block DDD transmission for a portable device as well as a fixed device.

In order to achieve the above object, the method according to the present invention, a radio frequency (RF) transceiver configured to transmit and receive data with the portable device, a hook state detection unit for detecting a hook state, a predetermined warning tone is to be output through the speaker Warning tone generating unit for generating a warning tone, a call circuit unit configured to include a loop control circuit for setting loop formation with a trunk line, a dual tone multi-frequency (DTMF) generating unit, and user information can be input. A method for blocking long-distance direct dialing of a wired / wireless telephone having a fixing device configured to include a key input unit and a micom, the microcom is fixed by analyzing information applied through a high frequency transceiver and a hook state detection unit A first checking step of checking a hook-off state of the device and the supporting device; as a result of performing the first checking step, If one of the portable devices is recognized as a hook-off state, the microcomputer controls the loop control circuit to form a loop with the trunk line; and when the loop is formed, the microcomputer is set to a mode for blocking a long distance direct call. A second check step of checking whether the second check step has been performed; and as a result of performing the second check step, there is dial information input through the device checked in the hook-off state in the first check step of the fixed device and the portable device when the long distance direct-phone blocking mode is set. A third check step of checking whether the third check step is performed; a fourth check step of checking again a hook state of a device checked in a hook-off state when there is no input dial information as a result of performing the third check step; If the hook of the device is in the off state as a result of performing the fourth checking step, returning to the third checking step; A fifth check step of checking whether the first input dial information is '0' if the dial information to be input exists as a result of performing the third check step; When the first dial information is '0', performing a warning check through the corresponding device; After the warning tone is generated, controlling the loop control circuit to turn off the loop formed with the trunk line of the wired or wireless telephone; And if the first dial information is not '0', transmitting the dial information to the dual tone multi frequency (DTMF) generator so that a normal call can be made. It is done.

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

1 is a schematic block diagram of a fixing device for a wired or wireless telephone for performing a method according to the present invention, which includes a key input unit 10, a microcomputer 20, a hook state detector 30, an RF transmitter / receiver 35, The warning tone generator 40, the speaker 50, DTMF generator 60, and the call circuit unit 70 is composed of.

The key input unit 10 shown in FIG. 1 is a means for inputting information desired by a user, and is configured to include a numeric key for inputting a dial number and a mode key for setting and releasing a DDD blocking mode. The microcomputer 20 transmits the key signal transmitted from the key input unit 10, the hook detection signal transmitted from the hook state detection unit 30, and the data transmitted from the portable device (not shown) through the RF transmitter / receiver 35. Based on this, the operation of the warning tone generating unit 40, the DTMF generating unit 60, and the telephone call circuit unit 70 is controlled, and the data is transmitted to the portable device not shown through the RF transmitting and receiving unit 35.

As shown in FIG. 1, the hook state detector 30 connects a resistor R1 uncondenser C1 in series between 5V and ground GND, and a hook switch Hook- in parallel with the capacitor C1. SW, HS) and the contact between the resistor R1 and the capacitor C1 are connected to the hook detection input terminal Hook Det of the microcomputer 20 to detect the hook state of the fixing device. . That is, when the handset provided in the fixed device of the hook state detection unit 30 is placed, the hook switch HS is set to the off state so that a voltage of 5V is applied to the hook detection input terminal Hook Det of the microcomputer 20. It is operated to be transmitted. On the other hand, when the handset provided in the fixing device is lifted, the hook switch HS is turned on to operate '0V' voltage to the hook detection input terminal Hook Det of the microcomputer 20. Accordingly, when the '5V' voltage is applied to the hook detection input terminal (Hook Det), the microcomputer 20 recognizes that the fixing device is in the 'hook on' state, and the '0V' voltage is applied to the hook detection input terminal (Hook Det). If approved, the lock is considered to be in the 'hook off' state.

The RF transmitter / receiver 35 is configured to wirelessly transmit data between the portable device and the fixed device. In particular, when a loop for a call is formed, an audio signal can be transmitted between the call circuit unit 70 of the fixed device and a portable device not shown. The warning tone generating unit 40 is controlled by the microcomputer 20 to generate a warning tone to the speaker 50 so that the warning tone is output through the speaker 50 provided in the fixing device.

The DTMF generation unit 60 is configured to generate a DTMF signal corresponding to the dialing signal transmitted from the microcomputer 20, and the call circuit unit 70 is connected to the loop control circuit 70a as shown in FIG. The circuit loop 70b is configured to selectively turn on / off the telephone loop by a loop control signal applied from the microcomputer 20, and when the telephone loop is turned on, a call can be made through the trunk line and the network circuit 70b. It works. The network circuit 70b is a circuit operated to enable transmission of voice and other information during normal call progress.

In the fixed device configured as described above, the long distance direct telephone call blocking method according to the present invention operates as shown in FIG.

First, the microcomputer 20 analyzes the hook detection signal transmitted from the hook state detection unit 30 and the signal transmitted through the RF transmitter 35 in step 200 to check whether the fixed device or the portable device is in the hook off state. .

That is, when the data transmitted from the hook state detection unit 30 configured and operated as shown in FIG. 1 is '5V (high)', the microcomputer 20 is in the hook state of the fixing device in the 'hook on' state. On the other hand, when the transmitted data is '0V (low)', the hook state of the fixing device is recognized as the 'hook off' state. In the case of a portable device, the hook on / off state is determined by analyzing a code transmitted from the RF transmitter / receiver 35.

As a result of the check of the hook state, if one of the fixed device and the portable device is recognized as the hook-off state, the microcomputer 20 proceeds from step 201 to step 202 so that the loop control signal is set to the on state. The loop control signal is transmitted to the call circuit unit 70 through the output terminal LOOP CON.

When the loop control signal for setting the loop to the ON state is applied from the microcomputer 20, the communication circuit unit 70 applies the loop control circuit 70a shown in FIG. As shown in FIG. 1, the loop control circuit 70a includes a base and a microcomputer of the NPN transistor Q1 and the transistor Q1 whose base is connected to the loop control signal output terminal LOOP CON of the microcomputer 20. The base is connected to the resistor (R2) and diode (D1) connected in series between the loop control signal output terminal (LOOP CON) of 20), the bias resistor (R3) connected to the base of the transistor (Q1), and the collector of the transistor (Q1). And a resistor (R4) and a transistor for matching between the base of the transistor (Q2) and the collector of the transistor (Q1), the PNP transistor (Q2) having an emitter connected to the trunk line and a collector connected to the network circuit 70b. It consists of a Zener diode ZD and a capacitor C2 connected in parallel between each contact point and ground between Q2 and the network circuit 70b and operates according to a loop control signal transmitted from the microcomputer 20.

That is, in step 202, the microcomputer 20 outputs a 'high' level signal through the loop control signal output terminal LOOP CON in order to control the telephone loop to the on state. Accordingly, the transistors Q1 and Q2 of the loop control circuit 70a are all turned on to turn on the loop between the trunk line and the network circuit 70b.

When the telephone loop is turned on in this way, the microcomputer 20 proceeds to step 204 to check whether the DDD blocking mode for blocking DDD transmission is set. As a result of the check, if the DDD blocking mode is not set, the process proceeds to step 206 to process a normal call.

However, if it is determined in step 204 that the DDD blocking mode is set, it is determined whether the input dial number corresponds to the DDD number. To this end, the microcomputer 20 proceeds from step 204 to step 208 to check whether there is a dial input from the key input unit 10 or the RF transmitter / receiver 35. That is, when the hook state of the fixing device is turned off in step 200, the microcomputer 20 checks whether dial information is input from the key input unit 10 in step 208. If the hook state is off, the microcomputer 20 checks whether dial information is input from the RF transceiver 35 in step 208.

As a result of the check, if the input of the dial information is not made, the microcomputer 20 proceeds to step 210 and the signal of the fixed device or the portable device is transmitted by the signal transmitted through the hook state detector 30 or the RF transmitter / receiver 35. Check if the hook is on. At this time, the check target is a device recognized as a hook off state in step 200, as described in step 208 described above. That is, when it is determined in step 200 that the fixing device is in the hook-off state, in step 210, it is checked whether the hook of the fixing device is on, and in step 200, when the portable device is found to be in the hook-off state, In operation 210, it is checked whether the hook of the portable apparatus is on.

If the check indicates that the hook of the device is on, the operation is terminated. However, as a result of the check, since the hook of the device is not in the on state, it is in the off state.

On the other hand, when the dial information is input in step 208, the microcomputer 20 proceeds to step 212 to check whether the first dialed number is '0'. As a result of the check, if the first input iron number is not '0', the number 20 goes to step 214 and the DTMF signal corresponding to the dial input is transmitted by transmitting the dial number input to the DTMF generating unit 60. Generates. The generated DTMF signal is transmitted to the network circuit 70b and processed as in the prior art so that a normal call can be made.

However, if the first dial number is '0', the microcomputer 20 recognizes that the dial number corresponding to the DDD is input, and proceeds to step 216 to generate a warning tone. At this time, if the device is a fixed device, the microcomputer 20 controls the warning tone generating unit 40 to generate the corresponding warning tone through the speaker 50, and if the device is a portable device, RF transmission and reception By transmitting the code information requesting the warning tone generation through the unit 35 to control the warning tone generating unit (not shown) provided in the portable device not shown so that the warning tone is generated.

In operation 218, the microcomputer 20 switches a signal output from the loop control signal output terminal LOOP CON from 'high' to 'low' in order to turn off the telephone loop. As a result, all of the transistors Q1 and Q2 included in the loop control circuit 70a are turned off, and the loop between the trunk line and the network circuit 70b is turned off. When the telephone loop is turned off in this way, the microcomputer 20 ends the work.

As described above, according to the present invention, when the DDD blocking mode is set in the wired / wireless telephone, the first dial information input through the device set to the current hook-off is checked to block the call when it is recognized as the DDD call. As well as portable devices of wired and wireless telephones, there is an effect that can selectively block DDD transmission through a fixed device.

Claims (1)

High frequency (RF) transmission and reception unit configured to transmit and receive data with the portable device, hook state detection unit for detecting the hook state, warning tone generating unit for generating a warning tone so that a predetermined warning tone can be output through the speaker, trunk line Wired and wireless with a call circuit unit configured to include a loop control circuit to set loop formation with a dual tone multi frequency (DTMF) generator, a key input unit for inputting user information, and a fixing device configured to include a microcomputer In the method for blocking long-distance direct telephone call of the telephone, the microcomputer checks the hook-off state of the fixed device and the portable device by analyzing the information applied through the high-frequency transceiver and the hook state detection unit A first checking step; As a result of performing the first check step, when one of the fixing device and the portable device is recognized as the hook-off state, the microcomputer controls the loop control circuit to form a loop with the trunk line; When the loop is formed, the microcomputer checks whether a mode for blocking a long distance direct call is set; a result of performing the second check step; A third checking step of checking whether there is dial information input through the device checked in the hook-off state in the first checking step among the portable devices; A fourth check step of checking the hook state of the device checked as the hook-off state again when the input dial information does not exist as a result of performing the third check step; If the hook of the device is in the off state as a result of performing the fourth checking step, returning to the third checking step; A fifth checking step of checking whether the first input dial information is '0' if the dial information to be input exists as a result of performing the third checking step; As a result of performing the fifth check step, if the first input dial information is '0', controlling to generate a warning tone through the corresponding device; After the warning tone is generated, controlling the loop control circuit to turn off a loop formed with the trunk line of the wire / wireless telephone; And if the first dial information is not '0', transmitting the dial information to the dual tone multi frequency (DTMF) generator so as to make a normal call. Long distance direct telephone call blocking method for a wired or wireless telephone characterized in that.