KR100666944B1 - Device for excluding high frequency signal generate in case of incoming in xDSL system - Google Patents

Abstract

The apparatus for removing high frequency signals generated by incoming calls in various digital subscriber line systems according to the present invention includes a hook switching unit which switches to a standby state when a ring signal is applied and to a callable state when a ring signal is not applied. By controlling a connection point with a telephone switchboard so that a high frequency signal is not generated even if a called party using various digital subscriber line systems attempts to receive voice communication service among data communication services, the data is controlled by the time when the ring signal is not applied. It is possible to secure the stability of the communication service and voice communication service.

Description

Device for excluding high frequency signal generate in case of incoming in xDSL system             

1 is a functional block diagram showing the configuration of various conventional digital subscriber line systems;

2 is a functional block diagram showing the configuration of various digital subscriber line systems according to the first embodiment of the present invention;

3 is a functional block diagram showing the configuration of various digital subscriber line systems according to a second embodiment of the present invention;

4A is a diagram showing the state of a ring signal applied from a telephone exchange in various digital subscriber line systems;

4B is a view showing hooking off while a ring signal is applied from a telephone exchange in various digital subscriber line systems;

5 is a flowchart illustrating a method of removing high frequency signals generated when an incoming call is generated in various digital subscriber line systems according to the first embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

1: xDSL device 2: telephone exchange

100: data communication means 200: voice communication means

210: hook switch 220: telephone ring circuit

230: telephone circuit unit 240: hook switching unit, optocoupler

241: signal determining unit 242: signal blocking unit

The present invention relates to various types of digital subscriber line (xDSL) systems that simultaneously provide voice communication services and data communication services. More particularly, the present invention relates to voice communication (telephone calls) during data communication in various digital subscriber line systems. The present invention relates to an apparatus for removing high frequency signals generated during incoming calls in various digital subscriber line systems for removing high frequency signals generated during incoming calls.

In general, various digital subscriber line (xDSL) is a technology for providing a voice communication service (telephone) and data communication service using one general telephone line.

As shown in FIG. 1, a conventional digital subscriber line system includes a telephone circuit unit that demodulates a voice signal to be transmitted to a user when the voice signal is received from the telephone switchboard 2, and outputs the voice through the receiver. 230, the telephone ring circuit unit 220 ringing the telephone ring so that the caller can know that the call is being attempted to the called party as the ring signal is received from the telephone exchange 2, and the called party picks up the receiver and the call is connected. The phone 200 including a hook (Hook) to maintain the standby state until; And

When the data signal is received from the x digital subscriber line (hereinafter referred to as "xDSL") equipment 1 of the data network, the modem 100 transmits the data signal to a computer, a laptop or a network equipment.

At this time, the telephone 200 generally maintains a voltage of -48V when the telephone is not picked up, and when the telephone rings, a ring signal (a signal of 70 to 90 Vrms, 20 Hz) is generated for 1 second at 3 second intervals. When making a call, make a call while maintaining -10 ~ -15V power supply.

Referring to a process of processing a voice signal during data signal processing in various conventional digital subscriber line systems, ring signals (signals of 70 to 90 Vrms, 20 Hz) are input from the telephone exchange 2 as shown in FIG. 4A. When the phone rings through the telephone ring circuit unit 220 is known to the called party. At this time, the telephone exchange 2 has already formed a call path between the caller and the called party. When the called party picks up the receiver and hooks it off, the telephone exchange station immediately connects with the caller.

If the receiver does not generate a high frequency signal when the receiver picks up the handset in a section (a) where the ring signal is not applied, but picks up the handset in the section (b) where the ring signal is applied (Hook off), FIG. As shown, the high frequency signal is generated by forcibly removing the ring signal at a high voltage level, which affects a data signal using a single line, resulting in a cyclic redundancy check (CRC) in the data signal, or As some of the positive data is broken, the link may be broken.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to prevent the occurrence of high-frequency signals when receiving for voice communication, to ensure the stability of data communication service and voice communication service. The present invention provides a high frequency signal removing device generated when an incoming call is received in a digital subscriber line system.

According to one aspect of the high-frequency signal removing device generated when the incoming in the various digital subscriber line system according to the present invention for achieving the above object, it is determined whether the ring signal is applied from the telephone exchange regardless of the hook on / off of the called party And a hook switching unit configured to switch to the standby state when the ring signal is applied, and to switch to the available state when the ring signal is not applied.

On the other hand, according to another aspect of the radio frequency signal removing device generated when the incoming in the various digital subscriber line system according to the present invention, is connected to the telephone ring circuit portion and the hook switch, when the ring signal is applied to switch to the standby state, the ring signal is applied If not, the hook switching unit for switching to the available state.

Hereinafter, an apparatus for removing high frequency signals generated when an incoming call is received in various digital subscriber line systems according to the first embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 2 is a functional block diagram showing the configuration of various digital subscriber line systems according to the first embodiment of the present invention. The various digital subscriber line systems according to the first embodiment of the present invention are data communication means 100 and voice. And a communication means 200.

The data communication means 100 serves to provide a data communication service with an external xDSL device 1 connected through a single line such as one telephone line.

In addition, the voice communication means 200 uses the same line as the data communication means 100, extracts an analog voice signal from a signal input from the external telephone exchange 2, and delivers the voice to the called party. , A hook switch 210, a telephone ring circuit unit 220, a telephone circuit unit 230, and a hook switching unit 240.

The hook switch 210 of the voice communication means 200 serves to control the flow of current between the switch and the telephone 200.

In addition, the telephone ring circuit unit 220 of the voice communication means 200 serves to generate a telephone ring when a ring signal (a signal of 70 to 90 Vrms, 20 Hz) is input from the telephone switch 2.

Then, the telephone circuit unit 230 of the voice communication means 200 converts the voice input from the talker into an electrical voice signal and transmits the voice signal to the telephone switchboard 2 while the voice signal is input from the telephone switchboard 2. It serves to send it to the receiver.

In addition, the hook switching unit 240 is connected in series between the telephone ring circuit unit 220 and the hook switch 210, when the ring signal is applied to the telephone ring circuit unit 220 and the telephone circuit unit 230 and the Blocks the hook switch 210 while the ring signal is not applied, and serves to connect the telephone circuit unit 230 and the hook switch 210, and includes a signal determining unit 241 and a signal blocking unit 242. .

In addition, the signal determining unit 241 of the hook switching unit 240 serves to determine whether a ring signal is applied from the telephone exchange 2.

In addition, when a ring signal is applied to the signal determining unit 241, the signal blocking unit 242 of the hook switching unit 240 blocks a path between the hook switch 210 and the telephone exchange 2, and a ring signal. If it is not authorized serves to connect the hook switch 210 and the telephone exchange (2).

Next, an operation process of the apparatus for removing high frequency signals generated when an incoming call is received in various digital subscriber line systems having the above configuration will be described with reference to FIG. 2.

First, the data communication means 100 performs a data communication service with an external xDSL device 1 connected through a single line such as one telephone line.

Thereafter, when a ring signal is applied from the external telephone exchange 2, the telephone ring circuit unit 220 rings the telephone ring to notify the called party. At this time, the ring signal input from the telephone exchange 2 is generally generated for 1 second at 3 second intervals, and has a frequency of 70 to 90 Vrms, 20 Hz, as shown in FIG. 4A.

Meanwhile, the signal determining unit 241 monitors that the ring signal is applied from the telephone exchange 2 and transmits a short signal to the signal blocking unit 242 when the ring signal is applied. If a ring signal is not applied, the access signal is transmitted to the signal blocking unit 242.

Then, the signal blocking unit 242 blocks the connection of the hook switch 210 and the telephone circuit unit 230 when the short circuit signal is input from the signal determining unit 241. At this time, the called party attempts to connect the call to the telephone switchboard 2 by turning off the hook switch 210 after picking up the handset after the telephone recognizes the movement of the telephone through the telephone ring generated by the telephone ring circuit unit 220. Even if the call blocker 242 is not connected to the call to the telephone exchange (2).

Thereafter, when the signal determining unit 241 detects that a ring signal is not applied from the telephone exchange 2 and inputs a connection signal to the signal blocking unit 242, the signal blocking unit 242 may detect the signal. A hook switch 210 is connected to the telephone circuit unit 230 to connect a call with the telephone exchange 2 so that a call can be made.

Next, a high frequency signal removing method generated when an incoming call is received in various digital subscriber line systems having the above configuration will be described with reference to FIG. 5.

First, the various digital subscriber line systems provide data service through the external xDSL equipment 1 and the data communication means 200.

At this time, it is determined whether a ring signal is applied from the telephone exchange 2 (S1). That is, when a ring signal is applied from the telephone switchboard 2, the telephone ringer rings through the telephone ring circuit unit 220, and whether the ring signal is applied by the hook switching unit 240 connected to the telephone ring circuit unit 220. Judge.

At this time, if a ring signal is applied (YES) in the determination step (S1), the state is switched to the telephone call waiting state (S2). At this time, even if the caller recognizes the call request through the telephone ring and hooks up the hook switch 210 by lifting the handset, the telephone exchange station 2 is in the standby state because the telephone call is waited at step S2. You are not connected to the caller through.

If the ring signal is not applied (NO) in the determination step (S1), it is switched to the telephone call enabled state (S3). At this time, when the called party hooks off the hook switch 210 in the state where the telephone call is possible, the high frequency signal is not generated and the caller is connected to the caller through the telephone exchange station 2.

Hereinafter, an apparatus for removing high frequency signals generated when an incoming call is received in various digital subscriber line systems according to a second embodiment of the present invention will be described in detail with reference to the accompanying drawings.

3 is a functional block diagram of a high frequency signal removing apparatus generated when an incoming call occurs in various digital subscriber line systems according to a second embodiment of the present invention, and occurs when receiving in various digital subscriber line systems according to a second embodiment of the present invention. The high frequency signal removing device is a modem 100 and a telephone 200.

The modem 100 supports a data communication service with an external xDSL device 1 connected through a single line such as one telephone line.

In addition, the phone 200 uses the same telephone line as the modem 100, and serves to support voice communication services to be transmitted / received with the telephone switch 2, the hook switch 210, and the telephone ring circuit unit 220. , A telephone circuit unit 230, and an optocoupler 240, and further include a handset, a handset, and a dial not shown in the drawing.

The talker in the telephone 200 serves to convert voice into an electrical signal using a diaphragm.

In addition, the hook switch 210 serves to control the flow of current between the switch and the telephone 200.

When the ring signal (20 Hz frequency) is input from the telephone exchanger 2, the telephone ring circuit unit 220 generates a telephone ring to notify the called party that the call is coming and at the same time emits an LED 221 to confirm visually. Do it.

In addition, the telephone circuit unit 230 converts the voice input from the handset into an electrical voice signal and transmits it to the telephone switchboard 2, and transmits a voice signal from the telephone switchboard 2 to the handset. Play a role.

In addition, the optocoupler 240 is connected in parallel to the telephone ring circuit unit 220 and connected in series between the telephone circuit unit 230 and the hook switch 210, so that the telephone ring circuit unit 220 of the telephone ring circuit unit 220 is connected. When the LED 221 emits light, the light is input to block the telephone circuit unit 230 and the hook switch 210. If the LED 221 does not emit the light, the telephone circuit unit 230 and the hook switch 210 are turned off. It serves to connect.

In addition, the handset serves to convert a voice signal into a voice in a portion corresponding to the speaker.

The dial serves to send a telephone number to the exchange to send a signal.

Next, an operation process of the apparatus for removing high frequency signals generated by an incoming call in various digital subscriber line systems having the above configuration will be described with reference to FIG. 3.

First, the modem 100 performs a data communication service with an external xDSL device 1 connected through a single line such as one telephone line.

Thereafter, when a ring signal is input from the external telephone exchange 2 to the telephone 200, the telephone ring circuit unit 220 rings the telephone ring and emits LED 221 to notify the called party. At this time, the ring signal input from the telephone exchange 2 is generally generated for 1 second at 3 second intervals, and has a frequency of 70 to 90 Vrms, 20 Hz, as shown in FIG. 4A.

Then, the optocoupler 240 receives the light source as the LED 221 of the telephone ring circuit unit 220 emits light, and blocks the telephone circuit unit 230 and the hook switch 210. At this time, the optocoupler 240 provides a pair with electronic separation between the input and the output and generates a conversion of the electronic signal using optical radiation.

If the called party attempts to connect the call with the telephone exchange 2 by lifting the handset and turning off the hook switch 210 after recognizing that the telephone is transferred through the telephone ring generated by the telephone ring circuit unit 220. The call blocker 242 is not connected to the telephone exchange 2.

Thereafter, if the LED 221 does not emit light as the ring signal is not applied from the telephone ring circuit unit 220, the optocoupler 240 connects the hook switch 210 and the telephone circuit unit 230 to the A call with the telephone exchange 2 is connected to allow a call.

Although the present invention has been described in detail only with respect to the specific embodiments described, it will be apparent to those skilled in the art that various modifications and variations are possible within the spirit of the present invention, and such modifications and modifications belong to the appended claims. will be.

As described above, according to the apparatus for removing high frequency signals generated by various digital subscriber line systems according to the present invention, even if a called party using various digital subscriber line systems attempts to receive voice communication service among data communication services, the high frequency signal is received. By controlling the time of connection with the telephone switching center so that no ring signal is applied, the stability of data communication service and voice communication service is secured.

Claims (8)

In the voice communication apparatus in various digital subscriber line (x Digital Subscribe Line) system, Hook switching, which determines whether a ring signal is applied from the telephone exchange, regardless of the called party's hook on / off, goes to the standby state when the ring signal is applied, and switches to the available state when the ring signal is not applied. Voice communication device for removing the high frequency signal generated when the incoming in various digital subscriber line system including a. The method of claim 1, The hook switching unit, A signal determination unit that determines whether a ring signal is applied from the telephone exchange; And When a ring signal is applied to the signal determination unit, the hook switch and the path of the telephone exchange period are interrupted, and when the ring signal is not present, a call interrupt occurs in various digital subscriber line systems including a signal blocking unit connecting the hook switch and the telephone exchange. Voice communication device to remove the high frequency signal which becomes. In the phone, It is connected to the telephone ring circuit unit and the hook switch, and when a ring signal is applied, the device switches to the standby state, and when the ring signal is not applied, the hook switching unit includes a hook switching unit for receiving a high frequency signal generated at the reception of various digital subscriber line systems. To remove the phone. The method of claim 3, wherein And said hook switching unit is an optocoupler or a photocoupler. The method of claim 4, wherein The optocoupler is, A receiver which is connected in parallel to a telephone ring circuit portion and receives a signal from the telephone ring circuit portion only while a ring signal is applied from the telephone exchange, and also emits light itself; And And a switching unit connected in series between the hook switch and the telephone exchange, the switching unit being opened when the receiving unit emits light and shorting when the receiving unit does not emit light. The method of claim 5, And a signal applied from the telephone ring circuit portion is at least one of an electrical signal and an optical signal. In a voice communication method in various digital subscriber line (x Digital Subscribe Line) system, Determining whether a ring signal is applied from the telephone exchange; And And when a ring signal is applied in the determination step, removing the high frequency signal generated when the incoming call is generated in various digital subscriber line systems. The method of claim 7, wherein If the ring signal is not applied in the determining step, the voice communication method for removing the high-frequency signal generated when the incoming call in various digital subscriber line system comprising the step of switching to the available state.

Images