KR0134333Y1 - Line interface apparatus of a video-on-demand system - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

A line interfacing device for an on-demand video system.

2. The technical problem the invention is trying to solve

Even when the ADSL modem is unplugged, it implements a line interface device that allows the PSTN line to be connected to the telephone.

3. Summary of solution of design

The line interface device according to the present invention includes at least one socket having one to four ports, and having a switching connection shorted between the one and three ports and between the two and four ports. According to the present invention, when the ADSL modem plug is inserted into the socket, the short circuit switching connection is opened, and when the ADSL modem plug is detached, the switching connection opened is short-circuited.

4. Important uses of the devise

The telephone service can be provided without any additional steps in installing and removing the ADSL modem.

Description

Line interfacing device for video system on demand

1 is a diagram showing a connection configuration of a telephone in a general public switched network.

2 is a diagram illustrating a connection configuration between a telephone and an ADSL modem in a line interfacing apparatus of a video system on demand according to the prior art.

3 is a diagram illustrating a connection configuration between a telephone and an ADSL modem in a line interfacing apparatus of an on-demand video system according to the present invention.

Figure 4 is an exploded perspective view showing a socket according to the present invention.

5 is an exploded perspective view showing a plug for an ADSL modem according to the present invention.

6 is a cross-sectional view of the socket and the plug for the ADSL modem according to the present invention.

* Explanation of symbols for main parts of the drawings

100: public switched network (PSTN) line 102: telephone plug

104: phone 200: plug for ADSL modem

201: High pass filter (HPF) 202: ADSL modem

203: low pass filter (LPF) 300: socket

The present invention relates to a line interfacing device for an on-demand video system, and more particularly, to a line interfacing device for providing telephone service faithfully even when the subscriber does not require a video service and the ADSL modem is unplugged.

In a typical Public Switched Telephone Network (hereinafter referred to as PSTN), the telephone is directly connected to the PSTN line via the socket 101 and plug 102 as shown in FIG. That is, the ① and ② ports of the socket 101 are connected to the PSTN line, and the connected ① and ② ports are connected to the telephone 104 through the ① and ② ports of the plug 102. As described above, the telephone-only socket 101 and the plug 102 have a ① port and a ② port connected to each other, and also have a ③ port and a ④ port. At this time, the ① port and ② port of the telephone plug 102 are connected to the telephone 104 through the modular cable 103.

On the other hand, Video On Demand (VOD) system, which stores various video information, can use this stored video information in existing telephone line (PSTN line), coaxial cable or digital satellite broadcasting system. Is transmitted to the subscriber. For example, if the customer implements a VOD system using an existing telephone line, the subscriber can receive not only telephone service but also video service. At this time, since the voice signal according to the telephone service occupies a low frequency band and the signal according to the video service occupies a high frequency band, a means for this needs to be additionally provided.

2 is a view showing an example in which the line interfacing device of the VOD system is constructed according to the prior art. As the socket 101, the socket used in the existing telephone is used as it is, and the telephone plug 102 and the ASL (Asymmetric Digital) are used. Subscriber Line) As a modem plug 200, it can be seen that the plug used in the existing telephone is used as it is.

Referring to FIG. 2, the telephone 101 and the ADSL modem are connected to the PSTN line, which is a transmission line of the VOD system, by a socket 101, a plug 102 and 200. That is, ③, ④ ports of the socket 101 and ③, ④ ports of the ADSL modem plug 200 are connected to the PSTN line, and the ①, ② ports of the ADSL modem plug 200 are connected to the telephone plug 102. It is connected to the ① and ② ports. At this time, the high pass filter (hereinafter referred to as HPF) 201 is connected to the ③ and ④ ports of the ADSL modem plug 200, so that the high frequency video signal provided from the PSTN line is transferred to the ADSL modem 202. Can be provided. The low pass filter (hereinafter referred to as LPF) 203 is connected to the ① and ② ports of the ADSL modem plug 200, so that the low-frequency audio signal provided from the PSTN line is connected to the telephone plug 102. It can be provided to the phone 104 through the ①, ② ports of.

However, as shown in FIG. 2, when the line interfacing device is implemented using the socket and the plug used in the existing telephone, the telephone plug 102 and the socket 101 are removed when the ADSL modem plug 200 is removed. There was a problem in that the connection state with the service could not be provided with the telephone service from the PSTN line. Therefore, even if the subscriber wants to receive only the telephone service from the PSTN line, there is a need to connect the plug for the ADSL modem 200 to the socket 101.

Accordingly, an object of the present invention is to provide a line interface device in which a VOD system only provides the telephone service faithfully when the subscriber requests only the telephone service.

Another object of the present invention is to provide a line interface device that provides telephone service even when the ADSL modem plug is removed from the VOD system.

Another object of the present invention is to provide a line interface device that can normally be a telephone service and a video service in any case where an ADSL modem plug and a telephone plug are connected to a socket connected to a PSTN line of a VOD system alone or simultaneously. In providing.

The line interface device according to the present invention for achieving the above objects is provided with 1 to 4 ports, and also has a switching connection shorted between the 1 and 3 ports and between the 2 and 4 ports. At least a socket to be included. According to the present invention, when the ADSL modem plug is mounted in the socket, the short circuit switching connecting portion is opened. When the ADSL modem plug is detached, the switching connecting portion opened is short-circuited.

In addition, the line interface device of the VOD system according to the present invention includes: a third port and a fourth port connected to a PSTN line, which is a transmission line of video service information or telephone service information, and electrically connected to the third port and the fourth port. A socket having a first port and a second port to be connected; For an ADSL modem having a first port and a second port that can be connected to the first and second ports of the socket, and a third port and a fourth port that can be connected to the third and fourth ports of the socket. With a plug; A high pass filter connected to third and fourth ports of the ADSL modem plug to pass high frequency component information of the video service information or telephone service information when the ADSL modem plug is mounted in the socket; An ADSL modem for demodulating the output of the high pass filter; A low frequency component of the video service information or telephone service information when the ADSL modem plug is mounted in the socket connected between the first and second ports and the third and fourth ports of the ADSL modem plug. A low pass filter for passing the information of; A telephone plug having a first port and a second port which may be connected to a first port and a second port of the ADSL modem plug or to the first and second ports of the socket; Connected to the plug for the telephone is configured as a telephone for transmitting telephone service information.

Hereinafter, a detailed description of a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

First of all, in adding reference numerals to the components of each drawing, it should be noted that the same components have the same reference numerals as much as possible even if they appear on different drawings. And in describing the present invention, if it is determined that the detailed description of the related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

3 is a view showing a connection configuration of the line interface device of the VOD system according to the present invention, the socket 300 is connected to the PSTN line for transmitting video service information or telephone service information, and the ADSL modem 202 is a socket ( At least a plug for an ADSL modem 200 to be connected to the PSTN line through 300 and a phone plug 102 to allow the phone 104 to be connected to the PSTN line through a socket 300 are provided. In addition, the line interfacing device according to the present invention is a low pass filter (LPF) 203 and ADSL modem plug 200 connected between the ①, ② port and ③, ④ port of the ADSL modem plug 200 And a high pass filter (HPF) 201 connected between the 3 and 4 ports and the ADSL modem 202.

4 is an exploded perspective view of a socket 300 showing how the socket 300 according to the present invention is constructed, and FIG. 5 is an ADSL modem showing how the plug 200 for the ADSL modem according to the present invention is constructed. An exploded perspective view of the plug 200.

In FIG. 4, the socket 300 is a ③ port and a ④ port for receiving telephone service information or video service information from the PSTN line, a ① port and a ② port connected to the indoor telephone wiring, and an ADSL modem plug 200. When it is equipped with a switching connection (301,302) which is electrically operated to open. In FIG. 5, the ADSL modem plug 200 includes ports ③ and ④ provided to receive information from ports ③ and ④ of the socket 300, and ① ports and ② connected to the LPF 203. The switch is provided in correspondence with the positions of the switching connecting portions 301 and 302 of the socket 300, and the switch opening and closing recesses 205 and 206 to open and close the switching connecting portions 301 and 302.

The characteristics of the present invention according to this configuration is different from the line interfacing device according to the prior art shown in FIG. 2, even when the ADSL modem plug 200 is detached from the socket 300 by the switching connection parts 301 and 302 by the PSTN line. Telephone service information from the telephone is provided to the telephone 104 via the telephone plug 102. In addition, the ADSL modem plug 200 has switch openings and recesses 205 and 206 corresponding to the switching connections 301 and 302 of the socket 300 to enable the above operation. As the switching connectors 301 and 302, a lead relay electrically operated by the switching openings and recesses 205 and 206 may be used. That is, when the reed relay is used as the switching connection parts 301 and 302, when the ADSL modem plug 200 is mounted in the socket 300, the switching connection parts 301 and 302 are connected to the ③ port of the socket 300 by the uneven parts 205 and 206 for the switch opening and closing. And ④ ports are separated from the ① and ② ports, and are opened. When the ADSL modem plug 200 is detached from the socket 300, the switching connections 301 and 302 are connected to the ① and ④ ports of the socket 300. Short circuit to the and ports respectively.

The overall operation according to the present invention will be described with reference to FIGS. 3 to 5 as follows.

When the ADSL modem plug 200 and the telephone plug 102 are mounted in the socket 300, the switching connection parts 301 and 302 of the socket 300 are opened, so that the telephone service information from the PSTN line is determined by the socket 300. ③, ④ port and the ①, ② port of the ADSL modem plug 200 is passed through the LPF (203) and then provided to the telephone 104 through the ①, ② port of the telephone plug 102, PSTN line The video service information from the socket 300 is passed through the HPF 201 via the ③, ④ port of the socket 300 and the ③, ④ port of the ADSL modem plug 200, and then provided to the ADSL modem 202 for demodulation. On the other hand, when the ADSL modem plug 200 is detached from the socket 300 and only the telephone plug 102 is mounted in the socket 300, the switching connection parts 301 and 302 of the socket 300 are short-circuited. The service information is provided to the telephone 104 through the ③, ④ ports of the socket 300 and the ①, ② ports and the ①, ② ports of the telephone plug 102.

On the other hand, the socket 300 and the ADSL modem plug 200 according to the present invention each have a predetermined locking means. After the ADSL modem plug 200 is mounted on the socket 300, the locking means may be firmly coupled to the socket 300 and the ADSL modem plug 200. Referring to FIG. 6 which shows a cross section of the socket 300 and the ADSL modem plug 200 according to the present invention, the ADSL modem plug 200 has a screw 207 as a locking means and the socket ( 300 has a groove 303 corresponding thereto. Accordingly, after mounting the plug 200 for the ADSL modem in the socket 300, the subscriber can use a screw 207 to secure their coupling state.

As described above, the present invention has the advantage that the subscriber who receives the video service can receive the service without any problem even using the existing telephone service.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the claims below, but also by the equivalents of the claims.

Claims (8)

A line interface device of an on-demand video system, comprising: a third port and a fourth port connected to a transmission line of video service information or telephone service information, a first port electrically connected to the third port and the fourth port; A socket having a second port, first and second ports connectable to the first and second ports of the socket, a third port connectable to the third and fourth ports of the socket, and The video service information or the telephone service when the plug for the SDL modem having a fourth port and the plug for the SDL modem is connected to the third and fourth ports of the SDL modem for mounting in the socket. A high pass filter for passing information of a high frequency component in information, an SD modem for demodulating the output of the high pass filter, and a plug for the SD L modem It is connected between the first port and the second port and the third port and the fourth port to pass the low-frequency component information of the video service information or telephone service information when the plug for the DSL modem is mounted in the socket A telephone plug having a low pass filter, a first port and a second port which can be connected to a first port and a second port of the ASD modem or a first port and a second port of the socket, and the telephone The device is connected to the equipment plug, characterized in that configured to consist of a telephone for transmitting telephone service information. The apparatus of claim 1, wherein the first port and the second port of the socket are shorted to a third port and a fourth port, respectively, when the plug for the SDL modem is detached from the socket. The apparatus of claim 1, wherein the first port and the second port of the socket are opened apart from the third port and the fourth port when the plug for the SDL modem is mounted in the socket. 2. The switch according to claim 1, wherein the first re drill rod is electrically connected between the first port and the third port of the socket for switching operation, and is electrically connected between the second port and the fourth port of the socket for switching. And further comprising a operative second re-drilllay. The apparatus of claim 4, wherein the plug for the SDL modem further includes a first uneven portion and a second uneven portion corresponding to the positions of the first and second re-drill lays of the socket, respectively. The method of claim 5, wherein when the plug for the SDL modem is mounted to the socket, the first and second re-drilling by the first concave-convex portion and the second concave-convex portion is electrically operated And the first port and the second port are opened apart from the third port and the fourth port, respectively. The method of claim 5, wherein when the plug for the SDL modem is detached from the socket, the first and second re-drilling by the first concave-convex portion and the second concave-convex portion is electrically operated And the first port and the second port are short-circuited to the third port and the fourth port, respectively. 8. The socket according to any one of claims 1 to 7, wherein each of the socket and the plug for the SDL modem has a locking means so as to secure the coupling state when the ADLS modem is mounted in the socket. Device.