KR200276737Y1 - ADSL Modem equipped with device for intercepting the thunder bolt - Google Patents

Abstract

The present invention relates to an asymmetric digital subscriber line (ADSL) modem, and more specifically, an expensive CPU mounted on a computer by applying a lightning or surge voltage through a telephone line connected to an ADSL modem for transmitting and receiving data. And an asymmetric digital subscriber line modem having a lightning protection means to prevent damage to the motherboard.

The present invention for achieving the above object, the connector 10 is connected to the telephone line and a pair of lines (L1, L2) for transmitting a signal, and the voice signal and ADSL signal from the lines (L1, L2) Micro filter 20 for separating the filter, LED display unit 30 for displaying the operation state of the ADSL modem, ADSL signal output from the connector 10 and ADSL signal output to the connector 10, respectively In the ADSL modem including a matching unit 60, it is provided between the surge absorbers (14b, 14c) connected to the lines (L1, L2) and the ground (G) formed on the main board of the personal computer, Lightning blocking means 50 is provided to control the connection to the ground on / off, the lightning blocking means is configured using a three-terminal socket and a jumper or a two-terminal slide switch.

Description

ADSL Modem equipped with device for intercepting the thunder bolt}

The present invention relates to an asymmetric digital subscriber line (ADSL) modem, and more specifically, an expensive CPU mounted on a computer by applying a lightning or surge voltage through a telephone line connected to an ADSL modem for transmitting and receiving data. And an asymmetric digital subscriber line modem having a lightning protection means to prevent damage to the motherboard.

Asymmetric Digital Subscriber Lines (ADSL), which are currently used mainly for data communications such as the Internet, typically have high-speed data of at least 1.5Mb in the downstream, where the telephone company and each home are connected directly 1: 1 and the data is transferred from the telephone company to the user. It is an asymmetric service for low speed data communication, which is capable of communication and, on the contrary, about 800 Kbps in the upstream case where data is transmitted from the user to the telephone station. However, it is possible not only to use high speed data communication while using a conventional telephone line or a telephone, but also to handle both general telephony and data communication with one telephone line, thereby providing the high-speed Internet without excessive facility investment.

The ADSL modem is used for communication in the above ADSL. Since the ADSL modem is directly connected to the telephone line, when lightning strikes through the telephone line, the internal device of the modem is damaged and a failure occurs. Therefore, the internal device is inserted into the circuit from the lightning or surge voltage. .

1 is a partial circuit diagram of an inlet of a conventional ADSL modem, which is connected to a telephone line (not shown) and has a connector 10 connected to a pair of lines L1 and L2 for transmitting a signal, and the line L1. Micro filter 20 for separating voice signal and ADSL signal from L2, LED display unit 30 for displaying the operation status of ADSL modem, ADSL signal output from connector 10 And a matching unit 60 for matching each ADSL signal output to the connector 10. The signal passing through the matching unit 60 becomes an input / output signal having up and down data, which is shown in the figure.

In addition, the polyswitch 12 (Polyswitch) is made of an electrically conductive polymer, it has a feature that can be used semi-permanently repeated without replacement of parts. The operating principle of the poly switch 12 is as follows. When overcurrent flows into the circuit, the Joule heat generated by this current changes the PolySwitch from a low resistance to a high resistance. Therefore, the overcurrent is limited to protect the internal circuit of the device. On the other hand, when the overcurrent factor is eliminated and the temperature of the device is lowered, the resistance value is returned to the low value of the initial state, thereby enabling the normal operation of the circuit.

However, the polyswitch 12 as described above does not effectively remove lightning or surge voltage, and thus, surge absorbers 14a, 14b, and 14c are inserted into a circuit. Referring to the drawings, three surge pressure absorbers 14a, 14b, and 14c are inserted between the lines L1 and L2. Particularly, one end of the surge pressure absorbers 14b and 14c is connected to ground. .

By the way, the most desirable earth is to bury the conductive material under the ground and then connect the wires. However, in most internal modems, it is often used or not connected to the chassis where the motherboard of the personal computer is mounted. In this connection state, when lightning strikes through the telephone line used in ADSL, the induced high voltage affects the internal parts of the PC, causing damage and adversely affecting the user's body. In addition, the devices installed inside the modem to prevent lightning and surge voltage also had problems such as weak resistance of parts and slow response time, so that the protection function is uncertain.

The present invention is designed to solve the above problems, the purpose of which is an expensive CPU, or mother mounted on a computer by applying a lightning or surge voltage through a telephone line connected to an ADSL modem for transmitting and receiving data to a personal computer The present invention provides an asymmetric digital subscriber line modem with lightning protection means to prevent damage to the board.

1 is an inlet circuit diagram of an ADSL modem conventionally used;

2 is an inlet circuit diagram of an ADSL modem according to the present invention;

3 is an external perspective view of a jumper used for lightning protection means;

Figure 4 is a front view of the outer panel of the ADSL modem is installed blocking means.

※ Explanation of symbols about main part of drawing ※

10: connector 12: polyswitch

14a, 14b, 14c: Surge absorber 20: Micro filter

30: LED display 40: ADSL modem

42: telephone jack 50: lightning protection

52: jumper 60: matching part

62: voltage suppressor

A built-in asymmetric digital subscriber line modem having a lightning protection means of the present invention for achieving the above object is a connector 10 is connected to a telephone line and a pair of lines (L1, L2) for transmitting a signal, and A micro filter 20 for separating the voice signal and the ADSL signal from the lines L1 and L2, an LED display unit 30 for indicating the operation state of the ADSL modem, an ADSL signal output from the connector 10, In the ADSL modem including a matching unit 60 for matching the ADSL signal output to the connector 10, the surge pressure absorbers 14b and 14c connected to the lines L1 and L2, respectively, and the personal computer. It is installed between the ground (G) formed on the main board is provided with a lightning blocking means 50 for controlling the connection to the ground on / off, the lightning blocking means is configured using a three-terminal socket and a jumper or Or 2-terminal slides Characterized by the values configured.

Referring to the present invention having such characteristics in detail as follows.

FIG. 2 is a circuit diagram of an ADSL modem inlet to which the lightning blocking means 50 is added according to the present invention, except for the lightning blocking means 50, which is essentially the same as FIG.

The lightning protection means 50 connects the surge pressure absorbers 14b and 14c provided to protect the modem from the surge voltage according to the user's control state and the ground G formed on the main board of the personal computer. Enforce the state. When the lightning blocking means 50 is opened according to the intermittent state, movement to the main board equipped with the ground G of the PC is blocked even when the lightning strikes through the telephone line.

As is well known, since the motherboard contains a large number of components necessary for the operation of an expensive CPU and a personal computer, when a component is damaged or malfunctions due to the inflow of lightning, the personal computer cannot be operated.

Lightning blocking means 50 according to the present invention, as shown, a socket having three open terminals (P1, P2, P3) that are not electrically connected, one end (P1) is a surge pressure absorber 14b 14c) is commonly connected to one terminal of the other terminal and the other terminals P2 and P3 are commonly connected to the ground (G) terminal of the PC. The connection in the three-terminal socket having the above configuration can be connected or opened by using a jumper 52 as shown in FIG.

The jumper 52 is provided with a pair of terminal housings electrically connected therein, and when coupled with a specific terminal, the jumper 52 serves to electrically connect a circuit. More specifically, when the jumper 52 is coupled to connect the terminals P1 and P2 of the lightning blocking means 50, the surge voltage or the lightning strike is connected to the ground G, and the terminals P2 and P3 are connected. When combined to connect, the surge voltage or lightning movement is blocked.

Lightning block means 50 of the present invention can also be configured using a two-terminal slide switch having the same action. That is, it is achieved by connecting the surge pressure absorbers 14b and 14c to one end and the ground G of the personal computer to the other terminal. In this case, the lightning blocking means 50 can be operated more easily than the connection using a jumper.

Referring to the operating state of the subject innovation having the configuration as described above are as follows.

When communication is started from the personal computer through the ADSL modem, the data included in the signal transmitted through the telephone line is input through the matching unit 60 through the HYBRID_RXD and HYBRID_RXN terminals, and the signals transmitted from the TX_HYBRIDD and TX_HYBRIDN terminals are also matched. It is transmitted to the connector 10 through 60. At this time, the terminals of the lightning blocking means 50 are electrically connected to P1 and P2.

When lightning occurs during the use of such a modem, the user changes the lightning blocking means 50 to the open state. In the open state, the terminals P1 and P2 of the lightning blocking means 50 are opened, and the terminals P2 and P3 are electrically connected to disconnect the terminals P1 and P2. Therefore, even when lightning strikes through the telephone line, it can block the movement toward the main board of the personal computer. This prevents the motherboard or expensive CPU of the personal computer from being damaged by the lightning strike. When the occurrence of the lightning strike is stopped, the user can connect the lightning blocking means 50 again to protect the ADSL modem from the surge voltage.

Lightning block device 50 of the present invention can be installed in the external or internal ADSL modem for ease of use. Referring to FIG. 4, in the case of the external ADSL modem 40, a lightning blocking means 50 is provided adjacent to a telephone connection jack 42 for a telephone line connection, and a connection state can be controlled using a jumper 52. have. Or simply use the slide switch to control the connection state. The built-in type can also be installed in the same position (exposed panel), but it is slightly inconvenient to operate than the external type.

The device 50 of the present invention as described above allows the user to select an operating state. In other words, when a ground that is normally operated is provided, the lightning blocking device 50 may be connected and used to effectively protect the ADSL modem and the computer from the lightning or surge voltage. In addition, since the lightning protection device 50 is not connected in the absence of ground, the ADSL modem and the computer can be effectively protected from lightning or surge voltage.

According to the present invention, a lightning or surge voltage is applied through a telephone line connected to an ADSL modem that is connected to a personal computer to transmit and receive data, thereby preventing damage to an expensive CPU or motherboard mounted on the computer. There is.

Claims (2)

A connector 10 connected to a telephone line and having a pair of lines L1 and L2 for transmitting a signal, a microfilter 20 for separating a voice signal and an ADSL signal from the lines L1 and L2; ADSL including an LED display unit 30 for displaying the operation state of the ADSL modem, and a matching unit 60 for matching the ADSL signal output from the connector 10 and the ADSL signal output to the connector 10, respectively. In the modem, It is installed between the surge pressure absorbers 14b and 14c connected to the lines L1 and L2, respectively, and the ground G formed on the main board of the personal computer, so that lightning protection can be controlled on / off the connection state with the ground. Asymmetric digital subscriber line modem with lightning protection means, characterized in that it is provided with means (50). The method of claim 1, Asymmetric digital subscriber line modem having a lightning blocking means characterized in that the lightning blocking means 50 is configured by using a three-terminal socket and a jumper or a two-terminal slide switch.