KR100311959B1 - Fax/modem tone detecting apparatus in wireless loop line network - Google Patents

Abstract

SUMMARY OF THE INVENTION An object of the present invention is to detect a tone signal of a facsimile or modem in a wireless subscriber network, by performing a detection operation by digital signal processing, thereby improving tone detection reliability and facilitating expansion according to multi-channel acceptance. It's about doing it.

The configuration of the present invention is a device for detecting a tone signal of a facsimile / modem connected to a wireless subscriber network, wherein the voice / data for receiving a digital signal output from a wireless subscriber network terminal or a switch and processing the voice and data to be output. A processing unit 81; A signal alignment unit 82 which receives digital signals output from a wireless subscriber network terminal or an exchange and sequentially arranges them and outputs the digital signals; A tone detector 83 which receives a digital signal output from the signal sorter 82 and detects a tone and outputs a corresponding signal accordingly; A system control unit (84) which operates according to a signal output from the tone detection unit (83) to control communication of a facsimile / modem; And a public telephone network interface unit 85 which receives the signal output from the voice / data processing unit and the signal output from the system control unit, converts the signal into a signal that can be processed in a public telephone network, and outputs the signal to a wireless subscriber network gateway switch. It is done by

Description

FAX / MODEM TONE DETECTING APPARATUS IN WIRELESS LOOP LINE NETWORK}

The present invention relates to a facsimile / modem tone detection device in a wireless subscriber network, and more specifically, to detecting a tone signal of a facsimile or a modem in a wireless subscriber network. A facsimile / modem tone detection device configured to perform a detection operation by processing.

In general, a facsimile or modem uses a public telephone network to exchange information with each other using various signals rather than voice data.

That is, as shown in Fig. 1, the terminal device 1 such as the facsimile 1A or the modem 1B is connected to the public telephone network 3 via the line connection device 2, and the other line connection device 4 Exchanges data with another facsimile 5A or modem 5B connected to the public telephone network 3).

At this time, the first signal when the facsimile 1A or modem 1B is connected to another facsimile 5A or modem 5B is not a voice but a single tone signal having a frequency of 2100 hertz (hz).

Therefore, the other facsimile or modem detects the tone signal, recognizes that the facsimile or modem is connected to the other party, and transmits a reply accordingly, thereby transmitting data to each other.

By the way, there is a need for a device for detecting a tone signal in the above, Figure 2 shows a conventional tone detection device.

Hereinafter, with reference to the accompanying drawings, a conventional facsimile / modem tone detection device will be described.

As shown in Fig. 1, the configuration of the conventional facsimile / modem tone detection device is as follows.

An analog tone detector 13 which receives an analog signal output from a terminal device 11 such as a facsimile or a modem and detects a tone signal;

An interface unit 14 which receives a signal output from the analog tone detector 13 and connects it to a public telephone network 15;

Converts the signal output from the terminal device 11 into a digital signal and outputs it to the interface unit 14, converts the signal transmitted from the public telephone network 15 and output from the interface unit 15 into an analog signal It consists of an analog-to-digital converter 12 for outputting to the terminal device (11).

The operation of the prior art made as described above is as follows.

The analog tone detector 13 receives an analog signal output from the terminal device 11 such as a facsimile or a modem to detect a tone signal, and the interface unit 14 receives a signal output from the analog tone detector 13. Connect to the public telephone network (15).

The analog-to-digital converter 12 converts the signal output from the terminal apparatus 11 into a digital signal, outputs the signal to the interface unit 14, and transmits the signal from the public telephone network 15 to the interface unit 15. The signal output from the signal is converted into an analog signal and output to the terminal device 11.

The first signal from the facsimile or modem is the calling tone coming from the side that attempted the connection, and the called tone coming from the side requesting the connection. Communication is made by.

That is, when the analog tone detection unit 13 detects the cold tone generated at the side requesting the connection according to the calling tone generated at the connection attempted side, communication is initiated according to the signal, and the analog-to-digital converter 12 ) To process the data.

However, since the conventional facsimile / modem tone detection device operating as described above detects a tone on an analog, a detection device and ancillary elements for detecting a cold tone of 2100 hertz are required. There is a problem in that the reliability of tone detection is deteriorated due to noise caused by line noise and analog devices.

In addition, in the case of accommodating a large number of subscribers, there is a problem in that the cost is increased due to the increase in the required analog elements, and the overall system stability is lowered.

Accordingly, an object of the present invention is to solve the problems of the prior art as described above, in detecting a tone signal of a facsimile or modem in a wireless subscriber network, by performing a detection operation by digital signal processing, The purpose of the present invention is to improve detection reliability and to facilitate expansion according to multichannel acceptance.

1 is a block diagram applying a connection state of a facsimile / modem in a general public telephone network;

2 is a block diagram to which a conventional facsimile / modem tone detection device is applied;

3 is a block diagram applying a connection state of a facsimile / modem in a general wireless subscriber network;

4 is a block diagram of a facsimile / modem tone detection apparatus applied to a wireless subscriber network according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

51: voice / data processing unit 52: public telephone network interface unit

53: signal alignment unit 54: tone detection unit

55: system control unit 60: wireless subscriber network gateway switch

The configuration of the present invention for achieving the above object is made as follows.

A device for detecting a tone signal of a facsimile / modem connected to a wireless subscriber network,

Voice / data processing means for receiving a digital signal outputted from a wireless subscriber network terminal or a switch and processing the voice and data;

Signal sorting means for receiving the digital signal output from the wireless subscriber network terminal or the switch and sequentially arranged to output; Tone for receiving the digital signal output from the signal sorting means to detect the tone, and outputs the corresponding signal accordingly Detection means;

A system control means for controlling the facsimile / modem to operate according to a signal output from the tone detection means; receiving a signal output from the voice / data processing means and a signal output from the system control means and receiving a public telephone network; It comprises a public telephone network interface means for converting into a signal that can be processed in the output to the wireless subscriber network gateway switch.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

As shown in Figure 4, the configuration of the facsimile / modem tone detection apparatus in the wireless subscriber network according to an embodiment of the present invention is as follows.

A device for detecting a tone signal of a facsimile / modem connected to a wireless subscriber network,

A voice / data processor 81 which receives a digital signal output from a wireless subscriber network terminal or a switch and processes and outputs voice and data;

A signal alignment unit 82 which receives digital signals output from a wireless subscriber network terminal or an exchange and sequentially arranges them and outputs the digital signals;

A tone detector 83 which receives a digital signal output from the signal sorter 82 and detects a tone and outputs a corresponding signal accordingly;

A system control unit (84) which operates according to a signal output from the tone detection unit (83) to control communication of a facsimile / modem;

A public telephone network that receives the signal output from the voice / data processing unit 81 and the signal output from the system control unit 84, converts the signal into a signal that can be processed in a public telephone network, and outputs the signal to the wireless subscriber network gateway switch 60. It comprises an interface unit 85.

Operation of the embodiment of the present invention made as described above is as follows.

The voice / data processor 81 receives a digital signal output from the wireless subscriber network terminal or the switch and processes the voice and data to output the voice.

The signal sorter 82 receives digital signals outputted from a wireless subscriber network terminal or an exchanger and sequentially sorts them, and outputs them. The tone detector 83 inputs digital signals output from the signal sorter 82. The controller detects a tone and outputs a corresponding signal accordingly, and the system controller 84 controls the facsimile / modem to operate according to the signal output from the tone detector 83.

The public telephone network interface unit 85 receives a signal output from the voice / data processing unit 81 and a signal output from the system control unit 84 and converts it into a signal that can be processed in a public telephone network. Output to (60).

3 shows a connection state of a general wireless subscriber network facsimile / modem, when the terminal device 20 such as a facsimile or modem is connected to the wireless subscriber network terminal 30 to transmit a signal wirelessly, the base station transceiver 40 Receives a signal from the) through the base station control device 50 through the wireless subscriber network gateway switch 60 to the public telephone network (70), the connection to the other party fax or modem to exchange data.

Here, the digitally converted line signal is input to the wireless subscriber network gateway switch 60, which is a signal of pulse code modulation (PCM) or E1 transmission method.

Therefore, the calling tone signal initially output from the facsimile or modem or the cold tone signal responding from the other facsimile or modem is also converted into a digital signal. There are two ways to implement in the wireless subscriber network.

One is to install in a wireless subscriber network terminal to which a facsimile or modem is connected, and the other is to install in a base station controller that interfaces with the wireless subscriber network gateway 60.

First, when the tone detection device 80 is installed in a wireless subscriber network terminal, it detects a transmission / reception signal of one channel. In this case, the tone signal may come from the terminal 30 side, or from the exchange 60 side. Since the tone signal may come, the signal alignment unit 82 aligns the bidirectional signal every frame, so that the tone detector 83 easily detects the tone signal.

On the other hand, when the tone detection device 80 is installed in the base station controller 50, since there are 30 channels of information on the E1 transmission line, the signal sorting unit 82 aligns the signals for each channel sequentially. Output to tone detector 83.

The system control unit 84 is located in the base station controller 50, and controls to change the subscriber line of the wireless subscriber network from the voice mode to the data mode according to the signal output from the tone detector 83.

By doing the above, by detecting the tone signal of the facsimile or modem in a digital signal state other than analog, it is possible to accurately detect without affecting line noise or other analog element noise.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, conversions, and modifications are possible within the scope without departing from the technical spirit of the present invention. It will be apparent to those who have knowledge.

Therefore, in the present invention operating as described above, in detecting a tone signal of a facsimile or modem in a wireless subscriber network, the detection operation is performed by digital signal processing, thereby improving the tone detection reliability and multi-channel acceptance. According to the expansion, the cost can be reduced.

Claims (3)

A device for detecting a tone signal of a facsimile / modem connected to a wireless subscriber network, Voice / data processing means for receiving a digital signal outputted from a wireless subscriber network terminal or a switch and processing the voice and data; Signal sorting means for receiving the digital signal output from the wireless subscriber network terminal or the switch to sequentially arrange the output; Tone detection means for detecting a tone by receiving a digital signal output from the signal alignment means and outputting a corresponding signal accordingly; System control means for controlling the facsimile / modem to operate according to the signal output from the tone detection means; And a public telephone network interface means for receiving a signal output from the voice / data processing means and a signal output from the system control means, converting it into a signal that can be processed in a public telephone network and outputting the signal to a wireless subscriber network gateway switch. A facsimile / modem tone detection device in a wireless subscriber network. The method of claim 1, wherein the signal alignment means and the tone detection means, A facsimile / modem tone detection device in a wireless subscriber network, characterized in that located in a wireless subscriber network terminal. The method of claim 1, wherein the signal alignment means and the tone detection means, A facsimile / modem tone detection device in a wireless subscriber network, characterized in that located within the wireless subscriber network base station controller.