KR20020028949A - Polarity reverse signal generating apparatus for telephone charge accounting in internet and telephone charge accounting method using said apparatus - Google Patents

Abstract

PURPOSE: An apparatus for generating a PRS(Polarity Reverse Signal) for the billing of telephone charges on the Internet and a billing method using the same are provided to carry out th billing of call charges on the Internet with an Internet telephone service system using an existing PBX(Private Branch eXchange). CONSTITUTION: A PRS generating apparatus(200) comprises a line seizure detection part(210), a polarity reversion part(240), a ringback tone signal generation part(220), and a control part(230). The line seizure detection part(210), connected with a calling subscriber telephone through a calling exchange(120), detects a hookup signal to check whether a line is seized. The ringback tone signal generation part(220) generates a ringback tone signal when the line is seized. The control part(230) receives a line seizure detection signal from the line seizure detection part(210) and drives the ringback tone signal generation part(220) to generate an internal ringback tone signal. Also the control part(230) compares the internal ringback signal with an external ringback tone signal transmitted from a called exchange(160) and judges whether the external ringback tone signal has been interrupted. In case that the external ringback tone signal has been interrupted, the control part controls the polarity reversion part(240) so as to generate a primary PRS. In case that it is detected that the seizure of the line has been released, the control part(230) controls the polarity reversion part(240) so as to generate a secondary PRS.

Description

POLARITY REVERSE SIGNAL GENERATING APPARATUS FOR TELEPHONE CHARGE ACCOUNTING IN INTERNET AND TELEPHONE CHARGE ACCOUNTING METHOD USING SAID APPARATUS}

The present invention relates to a polarity reversal signal generating device for charging a telephone bill in an internet network and a method for generating a polarity reversal signal for charging a telephone bill in an internet network using the apparatus.

The process of making a call in a general telephone is as follows. First, when the caller picks up the receiver and enters the called party's telephone number, the exchange generates a ringback tone signal. If the ringback tone signal continues for a predetermined time, the call is determined to be started and the call is made until the call ends.

Recently, an internet telephony service has been widely used by using a voice data integration technology applying a voice over internet protocol by compressing a voice.

VOIP, one of voice data integration technologies, is a series of communication service technologies that enable voice calls by converting voice data when using a phone into Internet protocol data packets and transmitting voice data to the Internet as a data network.

1 shows a schematic block diagram of an internet telephony service system for providing a telephony service over a conventional internet network.

Referring to FIG. 1, the Internet telephone service system includes a gatekeeper 140 connected to a calling terminal 100, a calling exchange 120, a billing server 110, and a calling VOIP gateway 130 through the Internet. ), Called party VOIP gateway 150, called party exchanger 160, and called party terminals 170-1 and 170-2 coupled to called party exchanger 160 via a public switched telephone network (PSTN). , ...), and the called party's telephone terminal 170-1 directly connected to the called party's VOIP gateway 150.

Here, when the calling party picks up the receiver and dials the called party's phone number, the calling party terminal 100 is connected to the calling party VOIP gateway 130 through the calling party exchange 120 and then connected to the gatekeeper 140 through the Internet. It is done. The originating VOIP gateway 130 converts the voice signal of the existing originating exchange 120 into an IP packet. The gatekeeper 140 determines the called party's telephone number to determine the called party's IP address. The caller's telephone terminal is then connected to the called party's VOIP gateway 150 in the recipient's proximity area Internet Data Center (IDC), and through the recipient's switchboard 160, through a public public telephone network (PSDN), a local / international / international telephone network. Up to 170-1. Alternatively, the calling party VOIP gateway 150 may be directly connected to the called party's telephone terminal 170-1.

The conventional telephone billing method using the PSTN network has been using a method of charging the call charge by recognizing the start point and the end point of the call using a polarity inversion signal generator installed in the local exchange of the telephone station. That is, when a calling party picks up a handset and dials a telephone number, the calling party detects a polarity reverse signal (PRS) and charges a call charge when the called party starts a call. . Here, the polarity reversal signal is typically sent from a local exchange to a private branch exchange (PBX) for charging the telephone usage fee.

On the other hand, the telephone billing method using the Internet network up to now is a method of receiving the user information from the device called the gatekeeper 140 and outputting the communication fee to the billing server, Web server and computer communication integration (CTI; Computer) telephony integration) A method of linking an exchange to output a communication fee to a billing server.

However, the conventional method of charging a call through the Internet has a drawback that a new system must be provided.

In addition, in the Internet network, there is a problem in that it is not possible to charge a call fee because there is no part which gives a polarity reversal signal of a telephone station, such as a public public network or a public switched telephone network (PSTN).

Accordingly, the present invention has been made in order to solve the problems of the prior art, the polarity reversal that can be applied to the Internet telephone service system using a conventional private exchange (PBX) as it is possible to charge the telephone bill in the Internet network The object is to provide a signal generator.

It is also an object of the present invention to provide a method and a system for charging a call charge, which enables billing in an internet network while still using an existing Internet telephony service system using a PBX.

In addition, an object of the present invention is to use the system for the telephone call over the Internet using the existing private exchange (PBX) as it is, the call charge billing method to charge not only domestic phone charges but also international calls in the Internet network and In providing a system.

1 is a schematic block diagram of an internet telephony service system for providing telephony services over a conventional internet network.

2 is a schematic block diagram of an Internet telephony service system using a polarity inversion signal generator according to an embodiment of the present invention.

Figure 3a is a block diagram of a polarity reversal signal generator for charging a telephone bill in the Internet network according to an embodiment of the present invention.

Figure 3b is a block diagram of a polarity inversion signal generator for charging a telephone bill including international telephone bills in the Internet network according to another preferred embodiment of the present invention.

4 is a circuit diagram of a polarity inversion signal generator for charging a telephone bill in an internet network according to an embodiment of the present invention.

Fig. 5 is a waveform diagram of a polarity inversion signal for indicating a call start and call end point.

Fig. 6 is a block diagram showing an internal configuration of an originating exchange that is connected to a billing server and calculates billing basic data of Internet phone bills.

7A illustrates a charging based data packet transmitted from a calling exchange to a charging server according to an exemplary embodiment of the present invention.

FIG. 7B illustrates a charging based data packet transmitted from the originating exchange to the charging server according to another embodiment of the present invention. FIG.

FIG. 8 is a flowchart illustrating a process of making a phone charge when an ordinary telephone and / or an internet telephone is used according to an exemplary embodiment of the present invention.

FIG. 9 is a flowchart illustrating a process of calculating a call duration for Internet phone billing at an originating exchange by generating a polarity inversion signal in an apparatus for generating a polarity inversion signal according to an embodiment of the present invention. FIG.

10 is a flowchart illustrating a process of connecting from a calling party to a called party in a telephone billing method in an internet network according to an exemplary embodiment of the present invention.

11 is a flowchart illustrating a method for charging a telephone bill in an internet network when using an international telephone according to a preferred embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

110: billing server 120: originating exchange

130, 150: VOIP gateway 140: gatekeeper

200: polarity inversion signal generator

210: line occupation detection unit 220: ringback tone signal generation unit

230: control unit 120: polarity inversion unit

According to the first aspect of the present invention to achieve the above object, between the calling exchange and the gateway according to the voice data integration protocol to receive the polarity inversion signal and calculate the call start and call end time to generate the billing basic data A method of generating a polarity inversion signal for billing an internet phone call performed by a combined polarity inversion signal generator, the method comprising: receiving an external ringback tone signal from the gateway and determining whether the received external ringback tone signal is stopped; In case of interruption, generating and outputting a primary polarity reversal signal for calculating a call start time; and detecting a moment when the caller ends the call and hangs up the handset, and has a polarity opposite to the primary polarity reversal signal. Generate a second polarity inversion signal to calculate the end time Provided are a method for generating a polarity inversion signal for internet telephony billing and outputting a system corresponding to the method.

The billing basic data may include at least one of the call start time, call end time, caller's phone number and called party's phone number.

The polarity inversion signal generator may generate the first polarity inversion signal and the second polarity inversion signal by correcting a time delay considering the transmission delay of the external ringback tone signal.

The originating exchange may calculate a time delay compensation value correcting the time delay in consideration of the transmission delay of the external ringback tone signal and include it in the charging basic data.

The determination of whether the received outer ringback tone signal is stopped may be determined by generating an inner ringback tone signal having the same waveform as the outer ringback tone signal and comparing the inner ringback tone signal with the received outer ringback tone signal.

The external ringback tone signal may be a pseudo ringback tone signal that virtually generates a ringback tone signal for a domestic telephone when the called telephone number is an international call.

According to another embodiment of the present invention, a method for generating a polarity reversal signal for internet telephony charging performed in a polarity inversion signal generating device coupled between a calling exchange and a gateway conforming to a voice data integration protocol, wherein the gateway is external from the gateway. Receiving a ringback tone signal, generating an inner ring back tone signal having the same waveform as the outer ring back tone signal, detecting whether an external ring back tone signal corresponding to the inner ring back tone signal has been received; If reception of an external ringback tone signal corresponding to an internal ringback tone signal is detected, determining whether an external ringback tone signal corresponding to the internal ringback tone signal is continuously received; and as a result of the determination, the internal ringback tone If reception of an external ringback tone signal corresponding to the signal is not detected in advance Generates an international ringback tone signal corresponding to the received external ringback tone signal among the stored international ringback tone signals and checks whether an external ringback tone signal corresponding to the generated international ringback tone signal is continuously received. Determining, generating and outputting a first polarity inversion signal when it is detected that the external ringback tone signal is no longer received, and detecting a moment when the caller hangs up the handset by ending the call. And generating and outputting a second polarity inversion signal having a polarity opposite to that of the second polarity inversion signal, wherein the originating exchange receives the first polarity inversion signal, calculates a call start time, and outputs the second polarity inversion signal. Internet call charge, characterized in that to calculate the end point of the call to receive the input billing data A method of generating a polarity reversal signal for charging and a system corresponding to the method are provided.

According to another embodiment of the present invention, voice data coupled to a polarity inversion signal generator that is coupled to an originating exchange that charges a telephone charge by calculating a call start time using a polarity inversion signal to generate a polarity inversion signal A ringback tone signal generation method for generating a polarity inversion signal for Internet telephone billing performed at a gateway according to an integrated protocol, the method comprising: receiving a called party information including a called party's telephone number from the calling exchange; Determining whether the called party telephone number is an international telephone number using a calling party telephone number; and if it is determined that the calling party number is an international telephone, a pseudo ringback tone signal that virtually generates a ringback tone signal used domestically. Including the step of transmitting to the polarity inversion signal generator The system corresponding to the ringback tone signal generation method and the method for the four call rate charging polarity inverted signal generator for is provided.

According to a second aspect of the present invention, there is provided a line occupancy detecting unit for detecting line connection and disconnection of a caller telephone terminal in combination with a calling exchange, and an internal ringback tone signal in combination with a gateway complying with a voice data integration protocol. An internal ringback tone signal having a ringback tone signal generator for generating the same waveform as an external ringback tone signal received from a gateway conforming to the voice data integration protocol, a gateway, an originating exchange, and a ringback tone conforming to the voice data integration protocol A polarity inversion unit coupled with a signal generator to generate a polarity inversion signal, and in combination with the line occupation detection unit, a ringback tone signal generator, and a polarity inversion unit, when the line connection detection unit detects a line connection Driving the ringback tone signal generator to generate the internal ringback tone signal; The polarity inversion unit to operate to generate a primary polarity inversion signal when the received external ringback tone signal is interrupted, and the polarity inversion when it is detected that the line is released by the line occupation detection unit. Provided is an apparatus for generating a polarity inversion signal for charging a telephone in an internet network including a control unit which controls a unit to generate a secondary polarity inversion signal.

The apparatus for generating a polarity inversion signal may further include an amplifier configured to receive and amplify the received external ringback tone signal in combination with the source exchanger and the polarity inversion unit.

The line occupancy sensing section may include a photo coupler coupled with the calling side switch and the polarity inversion section to detect that a caller receiver is occupied and occupying the caller telephone line.

The polarity inversion unit may be coupled to a switching element that is turned on by the polarity inversion command signal from the controller to operate to generate the polarity inversion signal by an on-off operation of a relay when the switching element is turned on.

The controller may transmit a polarity inversion command signal to the polarity inversion unit by correcting a time delay considering the transmission delay of the external ringback tone signal.

According to another embodiment of the present invention, a line occupancy detecting means for receiving an output of a caller's telephone terminal and detecting line connection and disconnection of the caller's telephone terminal, and receiving an external ringback tone signal from a gateway complying with a voice data integration protocol, The inner ring using the ringback tone signal generating means when it is detected that the ring connection is generated by the ring back tone signal generating means for generating a ring back tone signal, the polarity inverting means for generating a polarity inversion signal, and the line occupancy detecting means. Control to generate a backtone signal, operate the polarity reversal means to generate a primary polarity reversal signal when the received external ringback tone signal is interrupted, and have been disconnected by the line occupancy sensing means. When detected, the polarity inversion means is activated to generate a second polarity inversion signal. The polarity inverted signal generator for telephone fee charging is provided in the Internet network, including control for controlling sudanreul to.

Hereinafter, a preferred embodiment of an apparatus and method for generating a polarity reversal signal for charging a telephone in an internet network according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a schematic block diagram of an internet telephony service system using the polarity inversion signal generator 200 according to an embodiment of the present invention.

Referring to FIG. 2, the Internet telephony service system of the present invention connects the polarity reversal signal generator 200 between the calling side switch 120 and the calling side VOIP gateway 130 of the internet telephony service system of FIG. .

In the case of using the calling party private exchange 120 and the billing server 110 for the existing telephone billing in the existing Internet telephone service system shown in FIG. 1, since the trunk line exchange does not go through, the polarity is maintained at the calling party private exchange 120. You cannot receive a reverse signal. Therefore, the polarity inversion signal generator 200 capable of generating the polarity inversion signal is connected between the originating exchange 120 and the originating VOIP gateway 130.

In addition, the polarity inversion signal generator 200 generates a first polarity inversion signal by estimating a call start time using a ringback tone signal in consideration of the characteristics of the Internet network, and detects the moment when the caller's telephone terminal is disconnected to terminate the call. Estimated by time, a second polarity inversion signal is generated. Detailed description will be described later.

Existing source exchanger 120 receives the first and second polarity inversion signal from the polarity inversion signal generator 200 to calculate the call start time and the call end time to generate the billing basic data and then charge the server ( 110).

The billing server 110 performs billing processing for the Internet phone bill by using the transmitted billing basic data.

Here, the gateway is necessary to use a technology capable of integrating voice data to implement an Internet telephony service, and the communication method used in the gateway is not necessarily limited to comply only with the VOIP protocol. Of course, if the communication method used to implement the other communication method may be used.

3A is a block diagram illustrating a configuration of a polarity inversion signal generator 200 for charging a telephone bill in an internet network according to an exemplary embodiment of the present invention.

Referring to FIG. 3A, the polarity inversion signal generator 200 may include a line occupancy sensing unit 210 connected to an originating exchange 120, a polarity inversion unit 240 connected to an originating VOIP gateway 130, and an originating exchange. A control unit 230 connected to the ringback tone signal generator 220, the line occupancy detecting unit 210, the polarity inversion unit 240, and the ringback tone signal generator 220 connected to the 120 and the caller-side VOIP gateway 130. ).

The line occupancy detecting unit 210 is connected to the calling subscriber's telephone through the calling switch 120, and detects a telephone hook up signal generated when the calling subscriber picks up or lowers the telephone receiver to seize the line. Detect it.

The ringback tone signal generator 220 generates a ringback tone signal when the line is occupied.

The controller 230 receives the line occupancy detection signal of the line occupancy detection unit 210 and controls the ringback tone signal generator 220 to generate an internal ringback tone signal when the line occupancy is detected. In addition, the controller 230 compares the internal ringback tone signal with the external ringback tone signal transmitted from the destination exchange 160 to determine whether the external ringback tone signal is stopped. As a result of the determination, when it is stopped, the controller 230 controls the polarity inversion unit 240 to generate a primary polarity inversion signal. In addition, when it is detected that the line occupation is released by the line occupation detecting unit 210, the controller 230 operates the polarity inversion unit 240 to generate a second polarity inversion signal in which the primary polarity inversion signal is inverted again. To control it.

The polarity inversion unit 240 receives a polarity inversion command of the controller 230 and generates a polarity inversion signal. Detailed description will be described later.

3B is a block diagram illustrating a configuration of a polarity reversal signal generator for charging a telephone bill including an international telephone bill in an internet network according to another exemplary embodiment of the present invention.

Referring to FIG. 3B, the control unit 230 of the polarity inversion signal generator 200 of FIG. 3A further includes a ringback tone signal storage unit 250 for an international call.

The role of the line occupancy detecting unit 210, the ringback tone signal generating unit 220, and the polarity reversing unit 240 is the same as in FIG. 3A, and thus description thereof is omitted.

The ringback tone signal storage unit 250 for international calls stores ringback tone signals for each country in advance in consideration of the difference in ringback tone signals for each country.

The controller 230 determines whether an external ringback tone signal having the same pattern as the internal ringback tone signal generated by the ringback tone signal generator 220 is received. As a result of the determination, when an external ringback tone signal having a different pattern is received, an international ringback tone signal corresponding to the received external ringback tone signal among internationally stored ringback tone signals from the ringback tone signal storage unit 250 for international calls is stored. Read the ringback tone signal for a telephone. The controller 230 compares the external ringback tone signal with the read ringback tone signal for the international call to determine whether the external ringback tone signal corresponding to the read ringback tone signal for the international call is interrupted. As a result of the determination, when it is stopped, the controller 230 controls the polarity inversion unit 240 to generate a primary polarity inversion signal. Other operations are as described with reference to FIG. 3A.

FIG. 5 is a waveform diagram of a polarity inversion signal for indicating a call start time and a call end time. Referring to FIG. 5, it is assumed that a call is started at a time point S1 where the polarity is first reversed, and the call time is again at the time point S2 that is reversed. Is estimated to have ended.

4 is a circuit diagram of a device for implementing a polarity inversion signal generator 200 for charging a telephone bill in an internet network according to an exemplary embodiment of the present invention.

Referring to FIG. 4, the polarity inversion signal generator 200 is coupled to the terminals L1 and L2 connected to the trunk line part 126 of the source exchanger 120 through the resistors R1 and R2 and through the constant voltage source and the resistor R3. Amplification comprising a line occupancy sensing unit 210 comprising a coupled photocoupler (PC), an operational amplifier coupled to inverting and non-inverting inputs via resistors R1, R5, R6, capacitors C2, C3 at terminals L1 and L2 The output terminal of the circuit 222, the ringback tone signal generating circuit 224 coupled to the output terminal of the amplifier 222, the output of the ringback tone signal generating circuit 224 and the capacitor C5 and the output terminal of the line occupancy detecting unit 210 Control circuit coupled via resistor R4 and capacitor C1, diode D1, resistor R14 and diode between transistor TR2 and the collector terminal of transistor TR2 and ground of transistor TR2 having the output terminal of central processing unit (CPU) 230 as the base input terminal via resistor R11. D1, relay 242 And a polarity inversion unit 240 configured as a relay circuit coupled in parallel and switch circuits SW1 and SW2 switched by the relay 2420.

First, when the calling subscriber lifts the handset, the photo coupler PC is operated by the hook-up signal generated through the terminals L1 and L2, and the transistor TR1 is turned on so that the output voltage of the photo coupler PC becomes LOW. 230 to apply a LOW signal. The central processing unit 230 recognizes that the handset is lifted by this LOW signal.

The central processing unit 230 controls to generate an internal ringback tone signal by sending a control signal to the ringback tone signal generator 220 when it detects that the line is occupied by the receiver. The ringback tone signal generator 220 generates an internal ringback tone signal, for example, by using a crystal oscillator.

The destination exchange 160 generates a ringback tone signal (hereinafter referred to as an external ringback tone signal) to the terminals T and R of the polarity inversion signal generator 200 via the source VOIP gateway 130 via the Internet. send.

The polarity inversion signal generator 200 receives an external ringback tone signal from terminals T and R. The central processing unit 230 continuously compares the external ringback tone signal and the internal ringback tone signal input through the polarity inversion unit 240 and the ringback tone signal generator 220, and then receives the external ringback tone signal. When not, it is determined that the call is started and the transistor TR2 is turned on by applying a LOW signal to the polarity inversion unit 240. As a result, while the current flows through the relay 242, the switch SW1 and the switch SW2 are switched from T1 and T3 to T2 and T4, respectively, to generate a primary polarity inversion signal.

As soon as the calling subscriber puts down the handset, the line occupancy detection unit 210 detects this and turns the transistor TR1 off to a HIGH signal, and the central processing unit 230 determines that the line occupation has been released, and estimates it as the end point of the call. . When the HIGH signal is applied from the central processing unit 230 to the polarity inverting unit 240 again, the transistor TR2 is turned off and no current flows in the relay 242, and the switches SW1 and SW2 are switched from T2 and T4 to T1 and T3, respectively. A secondary polarity inversion signal is generated.

On the other hand, between the time when the external ringback tone signal is actually stopped at the called party and the time when the polarity inversion signal generator 200 at the caller determines that the external ringback tone signal is stopped, a time delay is delayed while passing through the Internet path. Occurs. In consideration of such a time delay, preferably, the billing server 110 described below may calculate a talk time by correcting a call start time in consideration of the time delay as described above, and perform billing processing. In addition, the control unit 230 of the polarity inversion signal generator 200 may adjust the generation time of the primary polarity inversion signal by using a predetermined time delay correction value.

Fig. 6 is a block diagram showing an internal configuration of the originating exchange 120 that is connected to the billing server and calculates billing basic data of the Internet phone bill.

Referring to FIG. 6, the calling side exchange 120 includes an extension 122 coupled to the calling terminal 100, a controller 124 coupled to the extension 122, and a trunk line coupled to the controller 124. 126.

The controller 124 calculates a call start time and a call end time using a pre-stored fee-related program and data and an input polarity reversal signal to generate billing basic data or perform a general control operation such as a call processing operation.

The trunk line unit 126 detects the polarity inversion signal from the polarity inversion signal generator 200 and transmits it to the control unit 124.

The extension unit 122 checks and controls the telephone state of the calling subscriber (whether the receiver is picked up or dropped). Although not shown in the figure, the mobile phone may further include an output unit for outputting the calculated telephone call fee.

7A illustrates a charging basic data packet transmitted from the originating exchange to the charging server according to an exemplary embodiment of the present invention, and FIG. 7B illustrates transmitting to the charging server in the calling exchange according to another embodiment of the present invention. Represents a charging base data packet.

Referring to FIG. 7A, the billing basic data includes, for example, a caller number 701, a call start time 703a, a call end time 705, a called party number 707, and the like. As described above, the control unit 230 of the polarity inversion signal generator 200 may include a call start time 703b corrected in consideration of the time delay to correct the time delay generated by outputting the primary polarity inversion signal. have.

FIG. 8 is a flowchart illustrating a process in which telephone billing is performed when using a general telephone and / or an internet telephone according to an exemplary embodiment of the present invention.

Referring to Fig. 8, first, when a caller picks up a receiver and inputs a called party's telephone number (step 801), the caller is connected to the calling side exchange (step 803). The calling side exchange 120 determines whether the call used by the caller is a regular phone or an Internet phone using the Internet (step 805). In the case of a regular phone, the communication path is established (829) by a public public telephone network (PSTN) or a mobile communication network (step 831), and the call is terminated (step 833). As a result of the determination, in the case of an Internet telephone, the polarity inversion signal generator 200 is connected (step 807), and is connected to the gatekeeper 140 via the caller side VOIP gateway 130 and the Internet (step 807). Then, the gatekeeper 140 determines the called party's IP address using the called party's telephone number (step 811), and is connected to the gateway 150 of IDC in the near-land area using the called party's IP address (step 813). When the call is initiated by the method described above to determine whether the call is initiated by the receiver (step 817), if the call is initiated, the polarity reversal signal generator 200 reverses the polarity (step 910), and the call is not initiated. Returns to step 803 again.

If it is determined that the call has ended by the above-described method, if the call is not terminated (step 825), the call is continued. (Step 823), the billing server 827 calculates the talk time according to the detection of the polarity inversion signal and performs billing processing (step 827).

FIG. 9 is a flowchart illustrating a process of calculating a call duration for Internet phone billing at a calling exchange by generating a polarity inversion signal in the polarity inversion signal generator 200 according to an exemplary embodiment of the present invention.

Referring to Fig. 9, the calling subscriber first picks up the handset, occupies the line and dials the called party's telephone number (step 901). The polarity inversion signal generator 200 receives an external ringback tone signal through the originating VOIP gateway 130 (step 903), and continues to monitor the external ringback tone signal and starts a call when the external ringback tone signal is interrupted. A primary polarity inversion signal for setting the time is generated and output to the originating exchange 120 (step 905). When the calling subscriber puts down the handset, the polarity inversion signal generator 200 generates a second polarity inversion signal for setting a call termination time and outputs it to the calling side exchange 120 (step 907). The calling exchange 120 then calculates the call start time and call end time using the generated primary polarity inversion signal and the secondary polarity inversion signal (step 909).

10 is a flowchart illustrating a process of connecting from a calling party to a called party in a telephone billing method in an internet network according to an exemplary embodiment of the present invention.

Referring to FIG. 10, first, when a calling subscriber picks up a handset and occupies a line (step 1001), the line occupation detection unit 210 of the polarity inversion signal generator 200 detects line occupation (step 1003). The ringback tone signal generator 220 then generates an internal ringback tone signal (step 1005), and sends a dial tone from the calling side VOIP gateway 130 to the called terminal (step 1007).

When the calling subscriber dials the called party's telephone number (step 1009), the gatekeeper 140 receiving the telephone number determines the called party's telephone number and connects to the called party's neighbor area IDC (step 1011). The called party exchange 160 then calls the called party using the called party's telephone number (step 1013).

11 is a flowchart illustrating a method of generating a polarity reversal signal in an internet network when using an international call according to an exemplary embodiment of the present invention.

Referring to FIG. 11, the calling party VOIP gateway 130 receives the calling tone and the called party number from the calling party (step 1101), and determines whether the call is an international call using the called party number (step 1103).

As a result of the determination, in the case of a domestic telephone call instead of an international call, the polarity inversion signal generator 200 generates a polarity inversion signal using an external ringback tone signal received from the destination exchange 160 (step 1111).

As a result of the determination, in the case of an international call, the caller's VOIP gateway 130 generates a pseudo ringback tone signal by virtually generating a ringback tone signal used domestically in place of the corresponding foreign ringback tone signal (step 1105). In this case, the pseudo ringback tone signal is generated only until a foreign called party starts a call and transmits a voice signal.

Then, the generated pseudo ringback tone signal is transmitted to the polarity inversion signal generator 200 (step 1107), and the polarity inversion signal generator 200 receives the pseudo ringback tone signal to stop the pseudo ringback tone signal. The time point at which the signal is detected is detected to generate a primary polarity inversion signal (step 1109).

Although the above has been described with reference to a preferred embodiment of the present invention, those skilled in the art to which the present invention pertains without departing from the spirit and scope of the present invention as set forth in the claims below It will be appreciated that modifications and variations can be made.

An apparatus and method for generating a polarity reversal signal for charging a telephone bill in an internet network according to the present invention can charge a telephone bill in an internet network while using an existing internet telephone service system using a conventional private branch exchange (PBX). It works.

In addition, the present invention has the effect of being able to charge not only domestic telephone charges but also international telephone charges in the Internet while still using the system for telephone call over the Internet using a conventional private exchange (PBX).

In addition, the present invention has an effect that can be charged more accurately by correcting the call start time due to data transmission delay in performing the telephone billing through the Internet.

Claims (17)

For internet phone billing performed in the polarity inversion signal generator coupled between the calling exchange and the gateway according to the voice data integration protocol, which receives the polarity inversion signal and calculates the start and end time of the call to generate the billing basic data. In the polarity inversion signal generation method, Receiving an external ringback tone signal from the gateway; Determining whether the received external ringback tone signal is interrupted, and if it is interrupted, generating and outputting a primary polarity inversion signal for calculating a call start time; And Detecting a moment when the caller ends the call and puts down the handset, generating and outputting a second polarity inversion signal for calculating a call termination time in which the polarity is opposite to the first polarity inversion signal; Polarity reversal signal generation method for Internet phone billing including. The method of claim 1, The billing basic data is And at least one of the call start time, the call end time, the caller's phone number, and the caller's phone number. The method of claim 1, In the polarity inversion signal generator And generating a first polarity inversion signal and a second polarity inversion signal by correcting a time delay in consideration of a transmission delay of the external ringback tone signal. The method of claim 1, In the originating exchange, And calculating the time delay compensation value correcting the time delay in consideration of the transmission delay of the external ring back tone signal and including it in the billing basic data. The method of claim 1, The determination of whether the received external ringback tone signal is interrupted And generating an internal ringback tone signal having the same waveform as the external ringback tone signal and comparing the internal ringback tone signal with the received external ringback tone signal. The method of claim 1, The outer ring back tone signal is If the called telephone number is an international call, a method of generating a polarity inversion signal for Internet phone billing, characterized in that it is a pseudo ringback tone signal virtually generating a ringback tone signal for a domestic call. A method for generating a polarity reversal signal for internet phone billing performed in a polarity inversion signal generator coupled between an originating exchange and a gateway conforming to a voice data integration protocol, Receiving an external ringback tone signal from the gateway; Generating an inner ringback tone signal having the same waveform as the outer ringback tone signal; Detecting whether an outer ringback tone signal corresponding to the inner ring back tone signal has been received; If reception of an external ringback tone signal corresponding to the internal ringback tone signal is detected, determining whether an external ringback tone signal corresponding to the internal ringback tone signal is continuously received; As a result of the determination, when the reception of the external ringback tone signal corresponding to the internal ringback tone signal is not detected, an international ringback tone signal corresponding to the received external ringback tone signal among the prestored ringback tone signals is stored. Generating and determining whether an external ringback tone signal corresponding to the generated ringback tone signal for international calls is continuously received; Generating and outputting a primary polarity inversion signal when it is detected that the external ringback tone signal is no longer received; And Detecting the moment when the caller hangs up the handset and generates a second polarity inversion signal having a polarity opposite to that of the first polarity inversion signal; Including, but the originating exchange exchanges the primary polarity inversion signal to calculate the call start time and receiving the second polarity inversion signal to calculate the end time of the call to generate the billing basic data How to generate polarity reversal signal for telephone billing. The method of claim 7, wherein In the polarity inversion signal generator And generating a first polarity inversion signal and a second polarity inversion signal by correcting a time delay considering the transmission delay of the external ringback tone signal. The method of claim 7, wherein In the originating exchange, And calculating the time delay compensation value correcting the time delay in consideration of the transmission delay of the external ring back tone signal and including it in the billing basic data. A line occupancy detecting unit coupled with the calling exchange to detect line connection and disconnection of the caller's telephone terminal; Generate a ringback tone signal in combination with a gateway conforming to a voice data integration protocol, wherein the inner ringback tone signal is the same waveform as an external ringback tone signal received from a gateway conforming to the voice data integration protocol. part; A polarity inversion unit coupled to a gateway, an originating exchange, and a ringback tone signal generator in accordance with the voice data integration protocol to generate a polarity inversion signal; And In combination with the line occupancy detector, the ringback tone signal generator, and the polarity inversion unit, when it is detected that the line connection is detected by the line occupancy detector, the ringback tone signal generator is driven to generate the internal ringback tone signal. And control the polarity inversion unit to generate a primary polarity inversion signal when the received external ringback tone signal is interrupted, and if it is detected that the line is released by the line occupancy detection unit. Control to operate to generate a secondary polarity inversion signal Polarity reversal signal generator for charging the telephone bill in the Internet network comprising a. The method of claim 10, The polarity inversion signal generator is And an amplifying unit coupled to the source exchanger and the polarity inverting unit to receive and amplify the received external ringback tone signal. The method of claim 10, The line occupation detecting unit Generation of a polarity inversion signal for telephone billing in an internet network comprising a photo coupler coupled with the calling side exchange and the polarity inversion to detect that a caller's handset is heard and occupying the caller's telephone line. Device. The method of claim 10, The polarity inversion portion In the Internet network characterized in that coupled to the switching element is turned on by the polarity inversion command signal from the control unit when the switching element is turned on to generate a polarity inversion signal by the on-off operation of the relay Polarity reversal signal generator for telephone billing. The method of claim 10, In the control unit And a polarity reversal command signal is transmitted to the polarity reversal unit by correcting a time delay considering the transmission delay of the external ringback tone signal. Line occupation detecting means for receiving an output of the caller's telephone terminal and detecting line connection and disconnection of the caller's telephone terminal; Ringback tone signal generating means for receiving an external ringback tone signal from a gateway conforming to the voice data integration protocol to generate an internal ringback tone signal; Polarity inversion means for generating a polarity inversion signal; And When it is detected that the line connection is detected by the line occupancy detecting means, the ring back tone signal generating means is used to control the internal ring back tone signal to be generated, and the polarity inversion when the received external ring back tone signal is interrupted. Control means for operating the means to generate a primary polarity inversion signal, and controlling it to operate the polarity inversion means to generate a secondary polarity inversion signal when it is detected that the line is released by the line occupation detecting means. Polarity reversal signal generator for charging the telephone bill in the Internet network comprising a. Internet telephony performed at the gateway according to the voice data integration protocol coupled to the polarity inversion signal generator coupled to the calling exchange that charges the telephone charge by calculating the call start time using the polarity inversion signal to generate the polarity inversion signal. In the ring back tone signal generation method for generating a polarity inversion signal for billing, Receiving called party information including a called party's telephone number from the calling exchange; Determining whether the called party number is an international number using the calling party number; If it is determined that the call is an international call, a polarity reversal signal generation for Internet phone billing includes transmitting a pseudo ringback tone signal virtually generated from a domestic ringback tone signal to the polarity reversal signal generator. Ringback Tone Signal Generation Method Memory in which the program is stored; A processor coupled to the memory to execute the program Including but not limited to: I) receiving, by the program, an external ringback tone signal; ii) determining whether the received external ringback tone signal is interrupted, and generating and outputting a primary polarity inversion signal if it is interrupted, iii. ) Generating a polarity reversal signal for Internet phone billing which detects the moment when the caller ends the call and hangs up the handset to invert the polarity of the first polarity reversal signal to generate and output a second polarity reversal signal. system.