JP3192473U - Internet telephone distribution device having MoCA barrier function - Google Patents

Abstract

An internet telephone distribution device having a MoCA blocking function is provided.
A low-pass filtering unit 10 used for inputting a frequency signal and a first output terminal 21 connected to the output terminal 60 are used to output the frequency signal after being attenuated by a first numerical value. A first-class distributor 20, an input terminal connected to the second output terminal 22 of the first-class distributor, a second distributor 30 used for outputting the frequency signal after being attenuated by a second numerical value, and A second class distributor 30 connected to the output terminal of the second class distributor 30 and used to output the frequency signal to at least one client connector 40 after being attenuated by a third numerical value.
[Selection] Figure 1

Description

  The present invention relates to a distributor, and more particularly, to an Internet telephone distribution apparatus having a MoCA blocking function.

  The current indoor cable TV system uses a cable modem or a set top box system to provide a cable TV with a tap, a splitter, or a house amplifier. Connect to cable and download video signal (with a frequency of about 54MHz to 1000MHz) or transmit data (upstream with a frequency of about 5MHz to 42MHz) into the host computer of the cable television system .

  The Coaxial Cable Multimedia Alliance (MoCA) protocol is an emerging protocol that allows transmission of multimedia video or audio over the current cable television coaxial cable, and its communication frequency band is: 1,125 MHz to 1,675 MHz.

  However, the design of the current branching unit structure uses a frequency signal of 5MHz to 1,002MHz, and when used in the MoCA system, the frequency signal of 1,125MHz to 1,675MHz between clients is in the main branch line input end. There is a possibility that the frequency signals of the two frequency bands may interfere with each other, and further, it affects the quality of the cable television and belongs to the shortage.

  The present invention provides an Internet telephone distribution device having a MoCA blocking function to improve the above-mentioned defects.

Japanese Patent Laid-Open No. 2002-274459

  An object of the present invention is to have a low-pass filtering unit, and efficiently filter the frequency signal of 1,125 MHz to 1,675 MHz, and the frequency signal of 1,125 MHz to 1,675 MHz and the frequency signal of 5 MHz to 1,002 MHz of cable television. It is an object of the present invention to provide an internet telephone distribution device having a MoCA blocking function that can prevent mutual interference from occurring.

  Another object of the present invention is to provide an internet telephone distribution device having a MoCA blocking function that has a first class distributor and can provide at least one internet telephone output.

  In order to achieve the above object, the Internet telephone distribution device having the MoCA blocking function of the present application has one end connected to the branch line input end, inputs a frequency signal, and performs low-pass filtering on the frequency signal. A low-pass filtering unit used in the above-mentioned configuration, an input terminal thereof is connected to an output terminal of the low-pass filtering unit, a first output terminal thereof is connected to at least one branch line output terminal, and the frequency signal is a first numerical value. A first class divider used for output after attenuation, and a first class divider used for output after the input terminal is connected to the second output terminal of the first class divider and the frequency signal is attenuated by a second numerical value. A secondary distributor and its input terminal is connected to the output terminal of the second distributor, and the frequency signal is attenuated by a third numerical value and then output to at least one client connector. It includes a tertiary divider used, the least.

  By implementing the Internet telephone distribution device having the MoCA blocking function of the present application, it has a low-pass filtering unit, efficiently filters the frequency signal of 1,125 MHz to 1,675 MHz, and the frequency of 1,125 MHz to 1,675 MHz. It is possible to prevent mutual interference between the signal and the frequency signal of 5 MHz to 1,002 MHz of the cable television.

It is a block explanatory view of an Internet telephone distribution device having a MoCA blocking function of a preferred embodiment of the present application. It is circuit explanatory drawing of the low-pass filtering unit of this application. It is circuit explanatory drawing of the 1st class divider | distributor of this application. FIG. 5 is an explanatory view of a distributor according to a preferred embodiment of the present application further including a printed circuit board. It is explanatory drawing in which the divider | distributor of the preferable Example of this application further has a shell.

  In order to make the structure, features and purpose of the present invention more comprehensible, the following detailed description is made with reference to the drawings and preferred embodiments.

  1 to 3 together, FIG. 1 shows a block diagram of an internet telephone distribution device having a MoCA blocking function of a preferred embodiment of the present application, and FIG. 2 is a circuit of a low-pass filtering unit of the present application. FIG. 3 is an explanatory diagram, and FIG. 3 is a circuit diagram of a first-class distributor according to the present application.

  As shown in the figure, the Internet telephone distribution apparatus having the MoCA blocking function according to the present invention includes a low-pass filtering unit 10, a first class distributor 20, a second class distributor 30, and at least one third class. And a distributor 40.

  One end of the low-pass filtering unit 10 is connected to a branch line input terminal 50, used to input a frequency signal and perform low-pass filtering on the frequency signal, of which the branch line input terminal 50 Is, but not limited to, a cable television coaxial cable connector, for example, used to input a radio frequency (RF) signal into a cable (not shown), the frequency of which is limited to this. For example, it is 5 MHz to 1,002 MHz. Among them, the low-pass filtering unit 10 further includes at least one low-pass filter 11 whose pass frequency band is not limited to this, for example, 5 MHz to 1,002 MHz, The cutoff frequency band is not limited to this, and is, for example, 1,125 MHz to 1,675 MHz.

  The input terminal of the first class divider 20 is connected to the output terminal of the low-pass filtering unit 10, the output terminal 21 is connected to the branch line output terminal 60, and the frequency signal is attenuated after the first numerical attenuation. Used for output. Of these, the branch line output 60 is, for example, but not limited to, a VoIP Internet telephone output, and a radio frequency (RF) signal of 5 MHz to 42 MHz is transmitted through the cable (not shown). Used for output. Of these, the first numerical value is, for example, 3.5 dB, although not limited thereto.

  The input terminal of the second class distributor 30 is connected to the second output terminal 22 of the first class distributor 20, and is used to output the frequency signal after being attenuated by a second numerical value. Of these, the second numerical value is, for example, 3.5 dB, although not limited thereto.

The input terminal of the third class distributor 40 is connected to the output terminal of the second class distributor 30 and is used to output the frequency signal to at least one client connector 48 after being attenuated by a third numerical value. Of these, the third numerical value is, for example, 3.5 dB, although not limited thereto. Among them, the frequency of the frequency signal output by the client connector 48 is 5 MHz to 1,002 MHz and 1,125 MHz to 1,675 MHz, of which 5 MHz to 1,002 MHz can be provided for cable TV signal upload and download, Communication can be performed between two clients using the Coaxial Cable Multimedia Federation (MoCA) protocol.

  As shown in FIG. 2, the low-pass filtering unit 10 of the present application includes a multi-stage low-pass filter 11 connected in series, and each low-pass filter 11 includes at least one inductor 111, a first capacitor 112, and the like. The second capacitor 113 is connected in parallel and grounded. In the present embodiment, the case where the four-stage low-pass filter 11 is formed in series will be described as an example, but the present invention is not limited to this.

  As shown in FIG. 3, the primary distributor 20 of the present application includes two coils 24 and 25, two inductors 26 and 27, a capacitor 29, and a resistor 29, of which one end of the coil 24 is low The other end of the coil 24 is connected to the ground. One end of the coil 25 is connected to one end of the inductor 26, and the other end of the coil 25 is connected to one end of the inductor 27. One end of the inductor 28 is connected between the coil 24 and the coil 25, and the other end of the capacitor 28 is connected to the ground. One end of the resistor 29 is connected to the other end of the inductor 26, the other end of the resistor 29 is connected to the other end of the inductor 27, and both ends of the resistor 29 are connected to an output end 60 and an output end 60, respectively. Connected to the input terminal of the second class distributor 30. Among them, the second class distributor 30 and the third class distributor 40 have a structure similar to the first class distributor 20, and the principle thereof is referred to the above description. Not described.

  The operating principle of the Internet telephone distribution device having the MoCA blocking function of the present application is, for example, as follows. In operation, the cable television frequency signal of 5 MHz to 1,002 MHz input from the branch line input terminal 50 passes through the low-pass filtering unit 10 and then attenuates 3.5 dB through the first-order distributor 20. Later, a radio frequency (RF) signal of 5 MHz to 42 MHz can be output to the VoIP Internet telephone output terminal 60, and the frequency signal of 5 MHz to 1,002 MHz can be input to the input terminal of the secondary distributor 30. The frequency signal of 5 MHz to 1,002 MHz can have an intensity of about 35 dB after further attenuation of the second class distributor 30 and the third class distributor 40 (between the branch line input terminal 50 and the client output). . When communication is performed between two clients using the MoCA protocol, the frequency signal of 1,125 MHz to 1,675 MHz is connected to the second class distributor 30 and the third class distributor 40 and then the first class distributor 20. Is output to the second output terminal 22. After passing through the filtering of the low-pass filtering unit 10, the frequency signal of 1,125 MHz to 1,675 MHz is blocked and does not enter the branch line input 50, and therefore the frequency of 1,125 MHz to 1,675 MHz. The frequency signal is efficiently filtered, and the frequency signal of 1,125 MHz to 1,675 MHz and the frequency signal of 5 MHz to 1,002 MHz of the cable television can be prevented from generating mutual interference, and at the same time, the frequency signal of 5 MHz to 42 MHz. Can be used for VoIP Internet phones.

  As shown in FIG. 4, the Internet telephone distribution device having the MoCA blocking function of the present application further includes a printed circuit board 80, and includes the low-pass filtering unit 10, the first class branching device 20, and the second class distributor 30. And at least one member such as a third-order distributor 40 is mounted.

  As shown in FIG. 5, the Internet telephone distribution device having the MoCA blocking function of the present application further includes a shell 90, the printed circuit board 80, the branch line input terminal 50, the output terminal 60, and the client connector 48. Etc. are accommodated. The shell 90 is not limited to this, and is formed of, for example, a metal material. Therefore, the Internet telephone distribution device having the MoCA blocking function of the present application has an inventive step as compared with the conventional branching device.

  As described above, by implementing the Internet telephone distribution device having the MoCA blocking function of the present application, it has a low-pass filtering unit and efficiently filters the frequency signal of 1,125 MHz to 1,675 MHz, and the 1,125 MHz It is possible to prevent a frequency signal of ˜1,675 MHz and a frequency signal of 5 MHz to 1,002 MHz of a cable television from causing mutual interference, have a first-class distributor, and provide at least one Internet telephone output terminal. The book has an inventive step compared to conventional distributors.

  The detailed description of the present invention according to the above embodiments does not limit the scope of the present invention. Even if a person familiar with the present technology makes changes or adjustments within the scope of the present invention, the important significance of the present invention is not lost and is included in the scope of the present invention.

DESCRIPTION OF SYMBOLS 10 Low-pass filtering unit 11 Low-pass filter 111 Inductor 112 1st capacitor 113 2nd capacitor 20 First class distributor 21 1st output terminal 22 2nd output terminal 24, 25 Coil 26, 27 Inductor 28 Capacitor 29 Resistor 30 Second class distributor 40 Third class distributor 48 Client connector 50 Branch line input terminal 60 Branch line output terminal 80 Printed circuit board 90 Shell

Claims (9)

A low-pass filtering unit used to connect one end to the branch line input end, input a frequency signal, and perform low-pass filtering on the frequency signal;
A first class distribution used to connect the input terminal to the output terminal of the low-pass filtering unit, connect the first output terminal to the branch line output terminal, and output the frequency signal after attenuation by a first numerical value. And
A second class distributor having an input terminal connected to a second output terminal of the first class divider and outputting the frequency signal after being attenuated by a second numerical value;
A third class distributor, whose input terminal is connected to the output terminal of the second class distributor and used to output the frequency signal to at least one client connector after a third numerical attenuation;
Internet telephone distribution device having MoCA blocking function. 2. The internet telephone distribution device having a MoCA blocking function according to claim 1, wherein the frequency signal is 5 MHz to 1,002 MHz. The low-pass filtering unit further includes at least one low-pass filter whose pass frequency band is 5 MHz to 1,002 MHz and whose cut-off frequency band is 1,125 MHz to 1,675 MHz. An internet telephone distribution device having the described MoCA blocking function. The low-pass filtering unit includes a multi-stage low-pass filter connected in series, and each low-pass filter includes at least one inductor, a first capacitor in parallel and a grounded second capacitor. Item 4. An Internet telephone distribution device having the MoCA blocking function according to Item 3. 2. The Internet telephone distribution apparatus having a MoCA blocking function according to claim 1, wherein the first class distributor is composed of two coils, two inductors, a capacitor and a resistor, and the first numerical value is 3.5 dB. 2. The Internet telephone distribution apparatus having a MoCA blocking function according to claim 1, wherein the second class distributor includes two coils, two inductors, a capacitor, and a resistor, and the second numerical value is 3.5 dB. 2. The Internet telephone distribution apparatus having a MoCA blocking function according to claim 1, wherein the third class distributor includes two coils, two inductors, a capacitor, and a resistor, and the second numerical value is 3.5 dB.   The frequency of the frequency signal output by the client connector is 5 MHz to 1,002 MHz and 1,125 MHz to 1,675 MHz, of which 5 MHz to 1,002 MHz can be used for uploading and downloading wired TV signals, and 1,125 MHz to 1,675 2. The Internet telephone distribution apparatus having a MoCA blocking function according to claim 1, wherein MHz can perform communication by a multimedia cable (MoCA) protocol between two clients via a coaxial cable.   2. The Internet telephone distribution device having a MoCA blocking function according to claim 1, wherein the branch line output terminal is a VoIP Internet telephone output terminal.

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