KR20000037675A - Internet phone splitter - Google Patents

Abstract

PURPOSE: An internet phone splitter is provided to selectively carry out internet phone calls and general phone calls by automatically transferring the internet network and the public switched telephone network. CONSTITUTION: A general telephone(100) wired with a tip line and a ring line carries out incoming and outgoing telephone calls. A subscriber line connection circuit(110) executes subscriber line connection and interface with the general telephone(100). A voice codec(120) converts an analog voice signal supplied from the general telephone(100) into a digital voice signal. An echo suppressor(130) removes echo voices generated from the general telephone(100). A DTMF(Dual Tone Multi Frequency) detects a DTMF signal and outputs the detected DTMF signal to a cable modem(150). The cable modem(150) connected to the echo suppressor(130) and the DTMF receiver(140) is connected with the internet network through a coaxial cable to carry out connection and interface. A relay(160) is selectively transferred according to the switching signal of the cable modem(150) to connect the general telephone(100) to the trunk line.

Description

A internet phone splitter

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an internet phone splitter, and in particular, when connecting to an internet phone module using a general telephone, an internet splitter which automatically switches a general trunk line to selectively and conveniently make a telephone call and a general telephone call using the internet network. It is about.

In general, as the multimedia communication service is popularized, not only a large amount of information can be obtained through the Internet, but also an Internet phone capable of making phone calls using the Internet is widely used.

Such an Internet phone is connected to a host that performs a specific Internet phone service of the Internet network by using a computer having a speaker and a microphone and a communication device capable of accessing the Internet network. After receiving information such as a recipient access address through a plurality of private information providers, an Internet phone to a desired receiver is possible.

Meanwhile, in the above-described conventional Internet phone method, an environment in which a call can be made only when both calls are made in advance during a call using the Internet phone is formed, that is, in such an environment, the appointment is interconnected through the PSTN. After the call is made, if the access time is not immediate, for example, the time when the verbal appointment is made in advance at any time such as a few hours in advance, the user checks it manually and the Internet phone service server There was an uncomfortable problem to connect to.

Therefore, in recent years, a conventional IP service server does not use an Internet phone service by an advance appointment between two parties, but accesses to the Internet network in real time so that a telephone call can be made relatively cheaply through the Internet network with a desired counterpart. Service has emerged.

FIG. 1 is a hardware block diagram for accessing an Internet network and a public telephone network using a general telephone, and includes a general telephone 10, a switch box 20, and an internet phone module 30.

In this configuration, the ordinary telephone 10 is a device equipped with a voice transmission and reception function capable of performing a telephone call with a counterpart subscriber via a public telephone network (PSTN).

The switch box 20 is a switching means that is switched based on a user's manual operation. The switch box 20 is selectively connected to a public telephone network through an internet phone module 30 or a subscriber telephone line via an exchange based on a user's switching operation. .

In addition, the Internet phone module 30 is a means for connecting to an Internet phone server connected to a wired cable network using a coaxial cable using a cable modem and using the Internet phone. A voice codec connected to a subscriber line connection circuit (SLIC) to be connected, a voice codec connected to the subscriber line connection circuit (SLIC) to convert and demodulate an analog voice signal into a digital voice signal or a digital voice signal into an analog voice signal; An echo suppressor connected between the cable modem and the cable modem to remove echo sound from the telephone network, and information indicating the address of the other party to the cable modem by receiving a dial tone signal from the echo suppressor. It is configured to include DTMF (Dual Tone Multi Frequency) receiver.

On the other hand, through the above-described configuration, in order for a user to make an Internet phone call or a general telephone call, the user needs to directly operate the switch box 20. When the user presses the dial button corresponding to the other party's telephone number by using the ordinary telephone 10, the Internet module 30 detects this and calls the other subscriber through the Internet network through the corresponding Internet phone server through the cable modem. Will be able to perform

In addition, in order to perform a general telephone call, the user switches the switch box 20 to a trunk line (telephone line), and when the user makes a call using the ordinary telephone 10, the counterpart subscriber and the public telephone network (PSTN) are connected by an exchange connected to the trunk line. Public switched telephone networks (VPs) form a telephone loop that allows for phone calls.

However, as described above, in the related art, the user has to switch the switch box by manual operation to perform an Internet phone or a general telephone call.

Accordingly, in the present invention, a routing path is used so that a user can use an internet network or a public telephone network by automatically grasping a user's intention based on a specific dial tone signal from a general telephone to perform a general telephone and an internet phone call. I was looking for a way to decide.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object thereof is to select a user's intention of selecting a network from a general telephone when using a public telephone or an internet phone by using a public telephone network and an internet network. The present invention provides an internet phone splitter that can automatically detect a network routing path based on a dial tone signal.

1 is a hardware block diagram for accessing an Internet network and a public telephone network using a general telephone.

2 is a hardware block diagram for connecting to an Internet network and a public telephone network including an Internet phone splitter according to the present invention.

<Explanation of symbols for main parts of drawing>

100: regular telephone 110: subscriber line connection circuit

120: voice codec 130: echo suppressor

140: DTMF receiver 150: cable modem

160: relay

The Internet phone splitter according to the present invention is a device for conducting calls between a public telephone and an Internet phone using a public telephone and an internet network using a general telephone, and a general telephone having a voice transmission / reception function and a connection to the general telephone. A subscriber line connection circuit connected to the subscriber line connection circuit, a voice codec for demodulating and demodulating an analog voice signal into a digital voice signal and a digital voice signal into an analog voice signal, and a voice codec connected to the subscriber line connection circuit. An echo suppressor that removes echo sound, a DTMF receiver that receives and outputs a DTMF signal from the echo suppressor, and is connected to the echo suppressor and the DTMF receiver and is connected to the Internet via a coaxial cable DTMF authorized from the DTMF receiver, performing connection and interface A cable modem for outputting a switching signal for disconnecting the trunk line if the signal is a special dial button signal, and for outputting a switching signal for cutting off the trunk line when an internet telephone is received through a coaxial cable; and selectively based on a switching signal of the cable modem. And a relay for connecting / blocking the general telephone to the trunk line.

The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the invention described below with reference to the accompanying drawings by those skilled in the art.

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

2 is a hardware block diagram for accessing an Internet network and a public telephone network including an Internet phone splitter according to the present invention, and includes a general telephone 100, a subscriber line connection circuit 110, a voice codec 120, and an echo suppressor ( 130), a DTMF receiver 140, a cable modem 150, and a relay 160.

In this configuration, the general telephone 100 is connected to the tip (TIP) and the ring (RING) two lines of the telephone line to perform the incoming and outgoing telephone call.

In addition, the subscriber line connection circuit 110 performs subscriber line connection and interface with the general telephone 100, and the voice codec 120 converts an analog voice signal applied from the subscriber line connection circuit 110 into a digital sound line signal. Then, the digital voice signal applied from the echo suppressor 130, which will be described later, is converted into an analog voice signal and applied to the subscriber line connection circuit 100 to perform bidirectional voice modulation and demodulation.

In addition, the echo suppressor 130 removes the echo sound generated in the telephone network.

Meanwhile, the DTMF receiver 140 detects a DTMF signal, which is a dial tone signal generated from the general telephone 100 and applied through the echo suppressor 130, and converts the detected DTMF signal into address information of the other party's Internet phone server and subscriber. As a result, the signal is output to the cable modem 150.

In addition, the cable modem 150 is connected to the echo suppressor 130 and the DTMF receiver 140, and is connected to the Internet network through a coaxial cable to perform connection and interface, and is applied from the DTMF receiver 140. If the first signal of the DTMF signal is a preset special dial button signal (for example, "#"), the switching signal for cutting off the trunk line is output and the first signal of the DTMF signal applied from the DTMF receiver 140 is preset. If it is not a dial button signal, using the counterpart address information applied from the DTMF receiver 140, the incoming information is output by the coaxial cable connected to the server for the Internet network connection and the call is controlled to form a call loop through the Internet network. When an Internet call is received through the device, the switching signal for disconnecting the trunk line is output and the incoming call control is performed. A control form.

In addition, the relay 160 is selectively switched based on the switching signal of the cable modem 150 to connect / block the general telephone 100 to the trunk line.

Next, the operation process of the Internet phone splitter according to the present invention having the above-described configuration will be described in detail.

First, the user presses a predetermined dial button corresponding to the telephone number of the other subscriber by holding the handset of the general telephone 10 and performing the normal telephone call over the trunk line, maintaining the hook-off state.

This dial button signal, that is, the DTMF signal, is applied to the cable modem 150 through the subscriber line connection circuit 110, the voice codec 120, the echo suppressor 130, and the DTMF receiver 140.

At this time, the cable modem 150 determines whether the first signal of the applied DTMF signal corresponds to a preset special dial button, for example, a "#" button.

If the first DTMF signal is not the DTMF signal corresponding to the "#" button, the cable modem 150 does not apply a predetermined switching signal to the relay 160 to disconnect the trunk line, and thus the relay 160 The general telephone 100 is connected to a public telephone network (PSTN) through an exchange (not shown) through which the outgoing call can be made.

Meanwhile, in order for a user to make an internet phone call through the Internet network, the user adds a special button "#" to a prefix of the telephone number of the other party assigned using the general telephone 100 to dial.

Then, the DTMF signal by the above-mentioned dialing is applied to the cable modem 150 through the subscriber line connection circuit 110, the voice codec 120, the echo suppressor 130, and the DTMF receiver 140.

At this time, the cable modem 150 checks whether the first difference of the applied DTMF signal is the "#" button signal, and if the "#" button signal is recognized by the user to use the Internet phone, the trunk line is connected to the relay 160. Apply a predetermined switching signal to block the.

Then, the relay 160 is switched based on the switching signal of the cable modem 150 to cut off the trunk line, and the cable modem 150 uses the DTMF signal after the "#" button signal to communicate with the other Internet phone subscriber. It is possible to control the access of the user, and thus the user can perform the Internet phone call through the Internet network with the other Internet phone subscriber.

On the other hand, the cable modem 150 blocks the trunk line by controlling the relay 160 when the incoming call signal of the Internet phone by the transmission of the other Internet phone subscriber is applied from the coaxial cable connected to the Internet phone server.

Therefore, the user can conveniently use the Internet phone call and the general phone call by simply inputting the Internet phone call and the general phone call into a specific dial button during the phone call.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

As described above, according to the present invention, when the Internet phone and the public phone network are mixed to perform an Internet phone and a general phone call, the user can select a network selection using a special button provided on the general phone to make the Internet phone call and The effect is that you can make regular phone calls.

Claims (1)

Apparatus for conducting landline and Internet phone calls using public telephones and the Internet using a regular telephone, A general telephone 100 having a voice transmission and reception function; A subscriber line connection circuit (110) connected to the ordinary telephone (100) to perform subscriber line connection interfacing; A voice codec 120 connected to the subscriber line connection circuit 110 for modulating and demodulating an analog voice signal into a digital voice signal and a digital voice signal into an analog voice signal; An echo suppressor (130) connected to the voice codec (120) to remove echo sound; A DTMF receiver (140) for receiving, detecting, and outputting a DTMF signal from the echo suppressor (130); It is connected to the echo suppressor 130 and the DTMF receiver 140 and is connected to the Internet through a coaxial cable to perform incoming and outgoing connection and interface, the first digit signal of the DTMF signal applied from the DTMF receiver 140 is A cable modem 150 for outputting a switching signal for disconnecting a trunk line if the preset special dial button signal is output and for outputting a switching signal for disconnecting a trunk line when an Internet telephone is received through a coaxial cable; And a relay (160) for selectively connecting / blocking the general telephone (100) to a trunk line based on a switching signal of the cable modem (150).