KR100648253B1 - System for detecting dtmf signal - Google Patents

Abstract

A DTMF(Dual Tone Multi Frequency) signal detection system is provided to enable a DTMF signal detector to detect a customer information DTMF signal inputted from a customer's telephone and to transmit the detected signal to a main server only as blocking a speech path of a counselor's telephone receiver, thus customer information is not exposed to the counselor. A counselor's telephone(20) is connected to a customer's telephone(10) having a DTMF customer information input unit by telephone networks(11) through a PBX(Private Branch Exchange)(21). A counselor's telephone receiver(30) handles various consultations in connection with the counselor's telephone(20), and requests customer information to be inputted. A main server(40) receives the customer information to store and manage the information, in connection with the counselor's telephone(20) and telephone receiver(30). A DTMF signal detector(50) has an interface for connecting the telephone(20), the receiver(30), and the main server(40) with one another, then receives power in connection with the main server(40) by a USB(Universal Serial Bus) cable(41), and is operated when the customer's telephone(10) and the counselor's telephone(20) are communicated with each other in a state of related software embedded in the main server(40) being driven. When a customer information DTMF signal is inputted, the detector(50) blocks a speech path of the counselor's telephone(20), and detects the inputted DTMF signal to convert the signal into a digital signal, then sends the digital signal to the main server(40) only.

Description

DMF signal detection system {SYSTEM FOR DETECTING DTMF SIGNAL}

1 is a block diagram showing a DTMF signal detection system according to the present invention;

2 is a view showing an outer case of the DTMF signal detector in the detection system according to the present invention;

3 is a view showing the internal structure of the DTMF signal detector in the detection system according to the present invention.

<Explanation of symbols for main parts of the drawings>

10: Customer Phone 11: Telephone Network

20: Agent telephone 21: Switchboard

22: RJ-9 30: Agent handset

40: main server 41: USB cable

50: DTMF signal detector 51: outer case

52: RJ-9 socket 53: USB socket

54: LED 55: DTMF signal recognition unit

56: automatic gain adjustment unit 57: decoder unit

58: USB drive chip unit 59: control unit

The present invention relates to a telephone network signal detection, and more particularly, to a DTMF signal detection system that prevents the theft of personal information through the telephone network because the information input by the customer is transmitted directly to the main server without passing through the counselor.

In general, in order to make a deposit or withdrawal at a bank or securities company, a customer must specify his / her own password when opening an account, and then perform a normal transaction through a password input device provided at a bank window. have.

However, when a customer exposes his / her password to a bank clerk with a password input for identity verification, the bank clerk can easily withdraw cash from another person's bankbook, etc., which is likely to be misused for various crimes.

Recently, telebanking and telemarketing, which can be used for banking or goods transactions over the telephone, are rapidly spreading due to their convenience. Direct contact with the customer is used.

In this case, a DTMF (Dual Tone Multi Frequency) signal in which a multi frequency code constitutes one digit as two frequencies at the same time, one at eight frequencies of the low frequency group and the high frequency group is used.

This DTMF signal is mainly needed to detect the subscriber's numeric information by receiving DTMF signal from the pushbutton subscriber at the exchange.It is about 10 times faster than the dial pulse and has a low error rate of the dial. Available.

However, in the case of the unmanned service through the ARS, there is a side that security is strengthened because it does not go through a counselor, but it takes a long time to input and it is difficult to appropriately consult various users.

In addition, when the counselor directly contacts the customer through the telephone, the user can immediately and flexibly respond to the user's needs, and a non-mechanical friendly service is possible, while still having a password and the like exposed to the counselor.

The present invention has been made to solve the problems of the prior art as described above, DTMF that can flexibly cope with the various needs of the user and can be friendly service, but do not go directly to the counselor when entering customer information, enhanced security Its purpose is to provide a signal detection system.

The DTMF signal detection system of the present invention for achieving the above object comprises a counselor telephone connected to the customer telephone and the telephone network is provided with DTMF customer information input means through the exchange;

A counselor handset connected to the counselor phone and processing various consultations and requesting input of customer information;

A main server connected to the counselor telephone and the counselor handset and receiving and storing customer information; And

It is provided with an interface that connects the counselor telephone, the telephone receiver, and the main server to each other. The client telephone and the counselor telephone are connected with the main server and the USB cable while being supplied with power and running related software embedded in the main server. A DTMF signal detector which operates when each other is in a call and blocks the call path to the counselor's handset when the customer information DTMF signal is input from the customer telephone, detects the input DTMF signal, converts it into a digital signal, and transmits only the main server;

It is characterized by consisting of.

And, the DTMF signal detector

DTMF signal recognition unit connected to the counselor handset to block the call;

An automatic gain adjustment unit for amplifying the analog DTMF signal of the DTMF signal recognition unit;

A decoder for converting the DTMF signal of the automatic gain adjusting unit into a digital signal;

A USB driver chip unit for transmitting the digital signal of the decoder unit to a main server; And

And a control unit for managing the DTMF signal recognition unit, automatic gain adjustment unit, decoder unit, and USB driver chip unit.

In addition, the DTMF signal detector is characterized in that the call is blocked and transmitted automatically by the call of the callback function using the DLL file at the same time the customer information DTMF signal is input.

On the other hand, the DTMF signal detector is characterized by detecting and transmitting only the customer information DTMF signal input from the customer telephone.

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 DTMF signal detection system according to the present invention, Figure 2 is a view showing an outer case of the DTMF signal detector in the detection system according to the present invention, Figure 3 is a DTMF signal in the detection system according to the present invention It is a figure which shows the internal structure of a detector.

As shown in Figure 1, the DTMF signal detection system of the present invention is used in banks, securities companies, shopping malls, etc. that require the input of customer information, such as a password through the telephone, customer telephone 10, counselor telephone 20, Agent handset (30). The main server 40, the DTMF signal detector 50, and the like.

The customer phone 10 is connected to the telephone network 11 and is provided with a DTMF (Dual Tone Multi Frequency) customer information input means such as a pushbutton so that the customer can directly input the customer information in addition to the handset. It's a phone.

The counselor telephone 20 is a telephone body connected to the telephone telephone 11 and the customer telephone 10 equipped with the DTMF customer information input means through the (private) exchange (PBX) 21, RJ-9 (22) terminal Is provided.

The agent handset 30 is used by an agent and handles a consultation with a customer directly and connects the telephone to a telephone (handset) or headset (with a headset) connected to the agent phone 20 to request input of necessary customer information. -9 (22) terminal is provided.

The main server 40 is a computer with embedded software for receiving, storing, and managing DTMF customer information input by a customer as a digital signal by the USB cable 41. The customer phone 10 and the counselor phone 20 And is connected to the counselor handset 30 is provided with a USB port.

The DTMF signal detector 50 is basically provided with an interface to be connected to the connected devices, and between the counselor phone 20, the counselor handset 30 and the main server 40 to exchange analog and digital signals. Intervene to connect them.

That is, as shown in FIG. 2 ((a) perspective view, (b) front view, (c) rear view, and (d) plan view), to be analog interfaced with the agent telephone 20 and the agent handset 30, respectively. A pair of RJ-9 sockets 52 are provided in the outer case 51, and a USB (Universal Serial Bus) socket 53 is provided to digitally interface with the main server 40.

In particular, the main server 40 and the USB cable to operate when the customer phone 10 and the agent phone 20 are in communication with each other while the associated software (USB driver, etc.) built in the main server 40 is running. 41) to receive power.

The DTMF signal detector 50 is an LED that is turned on / off in the outer case 51 so as to detect whether the associated software is driven while the power is supplied through the main server 40 connected by the USB cable 41. The lamp 54 is mounted.

As shown in FIG. 3, the internal circuit of the DTMF signal detector 50 is specifically a DTMF signal recognition unit 55, an automatic gain adjustment unit 56, a decoder unit 57, a USB driver chip unit 58, and a control unit ( 59).

DTMF signal recognition unit 55 is connected to the agent handset 30 and RJ-9 (22), and when the customer information DTMF signal is input from the customer telephone 10 so that the customer information DTMF signal is not transmitted to the agent handset 30 the agent The communication path to the receiver 30 is temporarily interrupted and the DTMF signal is picked up and recognized.

The automatic gain adjusting unit 56 determines the amplification ratio by measuring the magnitude of the analog DTMF signal output from the DTMF signal recognition unit 55 so that a constant signal can be output regardless of the magnitude of the input DTMF signal.

The decoder unit 57 decodes the analog DTMF signal output from the automatic gain adjustment unit 56 and converts it into a digital signal. The USB driver chip unit 58 converts the digital signal output from the decoder unit 57 into the main server ( 40) only.

The control unit 59 checks and generally manages the operating states of the DTMF signal recognition unit 55, the automatic gain adjustment unit 56, the decoder unit 57, and the USB driver chip unit 58.

In summary, the DTMF signal detector 50 immediately receives the customer information DTMF signal from the customer phone 10 while the customer phone 10 and the agent phone 20 are in communication with each other by the DTMF signal recognition unit 55. The call path to the counselor handset 30 is temporarily blocked.

In this way, the analog DTMF signal input while the customer information DTMF signal is not exposed to the counselor is converted into a digital signal by the decoder unit 57 and then transmitted only to the main server 40.

At this time, the DTMF signal detector 50 detects and transmits only the customer information DTMF signal input from the customer phone 10 so as to easily detect and prevent the remaining trouble, or occurs in other customer phone 10 and the agent phone 20. All DTMF signals can be detected and transmitted.

In addition, blocking and transmission of the call by the DTMF signal detector 50 is more object-oriented, and the related software built in the main server 40 is inputted while the customer information DTMF signal is input to prevent resource waste by sharing the source. (Dynamic Linking Library) file is executed automatically by calling the callback function.

Here, a DLL (Dynamic Linking Library) file is an original function of an operating system such as OS / 2, Windows, etc., which divides a software routine into several files, puts them on a disk, and loads only those needed in the execution memory.

The callback function refers to a function that is called from the operating system and executed automatically when a specific event occurs in the Windows operating system.

The DTMF signal detection system of the present invention configured as described above operates as follows.

In the DTMF signal detection system of the present invention, a customer who wants to use a service provided by a bank, a securities company, a shopping mall, or the like through a telephone network calls a counselor telephone 20 with a customer telephone 10 and requests a service.

When connected to the agent phone 20, the customer can be provided with friendly and flexible services by talking directly with the agent through the agent handset 30, which the agent basically uses, and pays a fee or changes personal information. For important matters, we receive a request for direct input of customer information from a counselor (handset).

Then, the customer inputs the customer information as an analog DTMF signal using a DTMF input means such as a pushbutton provided in the customer telephone 10.

At this time, the DTMF signal detector 50 interfaced between the agent phone 20, the agent handset 30, and the main server 40 is connected to the main server 40 and the USB cable 41 to receive power. The telephone 10 and the counselor telephone 20 are in communication with each other and operate while the associated software embedded in the main server 40 is running.

That is, when the DTMF signal detector 50 receives the customer information DTMF signal from the customer telephone 10 while the customer telephone 10 and the agent telephone 20 are in communication with each other, the DTMF signal recognition unit 55 immediately consults the telephone receiver. Temporarily block the call to 30.

Then, the input DTMF signal is detected and amplified by the automatic gain adjusting unit 56 to output a constant signal regardless of the magnitude of the input DTMF signal. 40) only.

Therefore, since the customer information DTMF signal input from the customer telephone 10 is transmitted only to the main server 40 without being transmitted to the agent handset 30 at all, leakage and theft of customer information through the counselor can be completely prevented. .

In addition, DTMF signal detector 50 is the customer information DTMF signal is input and at the same time the related software embedded in the main server 40, the DLL file calls the callback function to automatically block the call and DTMF signal transmission is carried out automatically, It is object oriented and efficient.

Finally, the main server 40 receives, stores, and manages the customer information input by the customer as a digital signal from the DTMF signal detector 50 to perform various procedures or update related information in response to the customer's requirements. Comprehensive control is possible.

The DTMF signal detection system of the present invention configured as described above is capable of providing a friendly and flexible service through an agent and preventing customer crimes from being exposed to the agent at the time of input of customer information requiring strong security. Useful effect.

Although the present invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that various changes or modifications can be made within the spirit and scope of the present invention, and such modifications or variations are attached thereto. Belong to the claims.

Claims (4)

A customer telephone having a DTMF customer information input means through an exchange and a counselor telephone connected to the telephone network; A counselor handset connected to the counselor phone and processing various consultations and requesting input of customer information; A main server connected to the counselor telephone and the counselor handset and receiving and storing customer information; And It is provided with an interface that connects the counselor telephone, the telephone receiver, and the main server to each other. The client telephone and the counselor telephone are connected with the main server and the USB cable while being supplied with power and running related software embedded in the main server. A DTMF signal detector which operates when each other is in a call and blocks the call path to the counselor's handset when the customer information DTMF signal is input from the customer telephone, detects the input DTMF signal, converts it into a digital signal, and transmits only the main server; DTMF signal detection system characterized in that consisting of. The method of claim 1, The DTMF signal detector DTMF signal recognition unit connected to the counselor handset to block the call; An automatic gain adjustment unit for amplifying the analog DTMF signal of the DTMF signal recognition unit; A decoder for converting the DTMF signal of the automatic gain adjusting unit into a digital signal; A USB driver chip unit for transmitting the digital signal of the decoder unit to a main server; And And a control unit for managing the DTMF signal recognition unit, automatic gain adjustment unit, decoder unit, and USB driver chip unit. The method according to claim 1 or 2, The DTMF signal detector is a DTMF signal detection system characterized in that the customer information DTMF signal is input and at the same time the call and call back function using the DLL file is automatically blocked and transmitted to the call. The method according to claim 1 or 2, The DTMF signal detector detects and transmits only the customer information DTMF signal input from the customer telephone.

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