KR100325583B1 - Device for LAN Data Transmission through voice telephone lines - Google Patents

Abstract

The present invention relates to a LAN data transmission apparatus through a telephone line that enables simultaneous transmission of telephone data and LAN data using a local telephone line already installed in a subscriber network. Coupling and decoupling to transmit and transmit transmission and reception signals of LAN data through other two wires has the advantage of providing high-speed Internet through existing telephone subscriber networks.

Description

Device for LAN Data Transmission through voice telephone lines

The present invention relates to a LAN data transmission apparatus through a telephone line, and more particularly, to a LAN data transmission apparatus through a telephone line that enables simultaneous transmission of telephone data and LAN data using a local telephone line already installed in a subscriber network. will be.

Internet service is becoming an indispensable service in information and communication that is used as a means of collecting and transmitting various information. As such, in order to use the Internet service, an Internet network must be connected.

Currently, there is a method for high-speed Internet service using a DSL modem using a two-wire telephone line existing in a subscriber network and a cable modem using a coaxial cable, or using an optical subscriber network and a wireless subscriber network. In order to transmit the data, the data signal is mainly mapped to amplitude, frequency, and phase information of a predetermined frequency signal and then transmitted through a telephone line medium. In this way, modulation techniques such as QPSK, QAM, and DMT are widely used in digital communication systems.

However, the system employing this technique is not only very complicated and many signal processing during the modulation process, but also the frame header or trailer structure at the physical layer and link layer to have error correction function according to the attenuation, distortion and noise inflow of the signal transmission line. It has a characteristic that the firmware and software for this is complicated.

Therefore, without applying the modulation / demodulation technique, a system that combines and separates the two signals according to the characteristics of the telephone signal and the LAN data signal on the telephone line, and adds the serial data to the telephone line, or the data signal to the telephone line by the FSK modem Although there was a system for combining, it is not able to process 10 Mbps Ethernet signal.

To solve these problems, a technique for combining and separating telephone signals and LAN data signals for transmitting telephone signals and LAN data through a two-wire telephone line is disclosed in US Pat. No. 5,841,841. In addition to the coupling of the input signal, the output signal, there is a problem that there is a real difficulty because the transmission of the telephone signal together.

The present invention has been made to solve the above problems, and an object of the present invention is to couple / decouple the Ethernet transmit / receive signal to two telephone lines so that two lines of four-wire telephone lines already hypothesized in the subscriber network are provided. In addition to providing direct transmission of telephone signals over telephones, other two-wire transmissions of Ethernet signals are provided in a half-duplex manner, providing a LAN data transmission device over a telephone line that is efficient and simple, and requires no power supply from subscriber equipment. have.

1 is a circuit diagram showing a LAN data transmission apparatus via a telephone line according to the present invention.

-Explanation of symbols for the main parts of the drawings-

100: subscriber module 150: first coupling / decoupling unit

200: center module 250: second coupling / decoupling unit

300, 310: first and second lines

400: switching hub

The present invention for realizing the above object is a center module connected to the switching hub and coupled to the LAN data signal and the telephone signal to each other, a subscriber module connected to the subscriber equipment to separate the LAN data signal and the telephone signal from each other, the center The first line which transmits the transmission signal and the reception signal of the LAN data to the two lines among the four wire telephone lines connecting the module and the subscriber module to each other, and the telephone signal to the other two lines among the four wire telephone lines connecting the center module and the subscriber module to each other. A second line for directly transmitting the data, a first coupling / decoupling unit installed in the subscriber module for coupling and separating the transmission and reception signals of the LAN data to the first line, and a LAN data installed in the center module. Consisting of a second coupling / decoupling unit for coupling and separating the transmission and reception signals of It characterized.

In addition, the second coupling / decoupling unit may further include an amplifier for amplifying the LAN data signal for signal distortion or noise processing caused by an increase in the first line distance.

Referring to the operation of the present invention made as described above are as follows.

Through the 4-wire telephone line connecting the subscriber module and the center module to each other, the center module couples the transmission and reception signals of the LAN data and transmits them to the telephone line of two lines and transmits the telephone signal directly to the other two lines of telephone line. When the subscriber module separates the transmission signal, the reception signal and the telephone signal of the LAN data transmitted from the subscriber module to the two wires, it is connected to the subscriber equipment to transmit the Ethernet packet, and the telephone signal transmitted to the other two telephone line to the telephone terminal. It works by connecting LAN data and telephone signals using a four-wire telephone network already in place.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings. In addition, this embodiment is not intended to limit the scope of the present invention, but is presented by way of example only.

1 is a circuit diagram showing a LAN data transmission apparatus via a telephone line according to the present invention.

As shown here, the center module 200, which is located in a line distribution room in a building or apartment complex, is connected to a switching hub 400 connected to the Internet network to couple LAN data signals and telephone signals to each other, and the subscriber's home. Subscriber module 100 connected to the installed subscriber equipment to separate the LAN data signal and the telephone signal from each other, and the transmission signal of the LAN data in two lines among the four-wire telephone lines connecting the center module 200 and the subscriber module 100 to each other. And a first line 300 for transmitting a received signal, a second line 310 for directly transmitting a telephone signal to another two lines among four-wire telephone lines connecting the center module 200 and the subscriber module 100 to each other. And a first coupling / decoupling unit 150 installed in the subscriber module 100 for coupling and separating the transmission signal and the reception signal of the LAN data to the first line 300 and in the center module 200. Installed LAN is made a transmission signal and a reception signal of the data to the first line coupling and separation in order to transmit a 300 second coupling / decoupling unit 250. In this case, the second coupling / decoupling unit 250 may further include an amplifier 260 for amplifying the LAN data signal for signal distortion or noise processing caused by an increase in the first line distance.

Referring to the operation of the present embodiment made as described above are as follows.

The subscriber module 100 receives (Tx +, Tx-, Rx +, Rx-) signals of the Ethernet LAN interface unit such as a personal computer (PC) or a server of the subscriber through the first coupling / decoupling unit 150 and receives them. The signal is combined into two signals to transmit the telephone signal through the first line and the center module 200 directly through the second line.

Then, the LAN data transmitted through the first line in the second coupling / decoupling unit 250 of the center module 200 is separated into four signals so as to be connected to the switching hub 400 and through the second line. The transmitted telephone signal is transmitted to the telephone subscriber network (PSTN).

As described above, the present invention can transmit telephone signals and data signals to subscribers of buildings, apartment complexes, shopping malls, hotels, etc. using four-line telephone lines equipped with 10 Mbps Ethernet networks, thereby easily constructing an Internet subscriber network. There is an advantage that it can.

Claims (2)

The first LAN data signal and the first voice signal are respectively received from the data processing device and the voice communication device, and transmitted to the opposite transceiver through the four-wire telephone line, and the second LAN data signal and the second are transmitted from the opposite transceiver through the four-wire telephone line. A LAN data transmission device for receiving a voice signal and supplying the voice signal to the data processing device and the voice communication device, respectively. Disposed between the data processing device and the first line pair of the four-wire telephone line, receiving the first LAN data signal from the data processing device, high-pass filtering, and supplying the first line pair to the first line pair; A high pass filter for receiving the second LAN data signal from a pair, high pass filtering the same, and supplying the second LAN data signal to the data processing device; And A second line pair disposed between the voice processing device and the second line pair of the four-wire telephone line, the first voice signal is received from the voice processing device, low-pass filtered, and supplied to the second line pair, and the second line pair An area pass filter which receives the second voice signal from the area, filters the area pass and supplies the same to the voice processing device; LAN data transmission device comprising a. The method of claim 1, An equalization amplifier disposed between the high pass filter and the data processing device and configured to compensate for signal distortion and attenuate noise with respect to the high pass filtered second data signal; LAN data transmission device further comprising.