CN201352817Y

CN201352817Y - Auxiliary sending-receiving fax device

Info

Publication number: CN201352817Y
Application number: CNU2009201133490U
Authority: CN
Inventors: 崔剑兵
Original assignee: Hangzhou Challenge Network Information Technology Co Ltd
Current assignee: Hangzhou Challenge Network Information Technology Co Ltd
Priority date: 2009-01-22
Filing date: 2009-01-22
Publication date: 2009-11-25
Anticipated expiration: 2019-01-22

Abstract

The utility model relates to an auxiliary sending-receiving fax device comprising a dialing-answering module, an off-hook circuit, an FSK signal modulation module and an FSK signal demodulation module, a file coding module, a QAM signal modulation module, a QAM signal demodulation module, a file decoding module and a linear coupler, wherein the FSK signal modulation module and the FSK signal demodulation module are used for the answering and transferring of fax interaction information; one end of the linear coupler is connected with the QAM signal demodulation module, and the other end thereof is connected with a public telephone network. The auxiliary sending-receiving fax device can realize that the public switched telephone network (PSTN) is connected with general purpose computer equipment, thus realizing the function of computer auxiliary sending-receiving faxes.

Description

A kind of auxiliary fax sending and receiving device

(1) technical field

The utility model relates to a kind of auxiliary fax sending and receiving device.

(2) background technology

Facsimile machine is the common equipment in the modern business office.The operation principle of facsimile machine is as follows: the file that at first will need to fax is converted into image, literal the digital signal that adopts the huffman coding mode by photo electric scanning, after V.27, V.29 mode is modulated, change into audio signal, transmit by traditional phone line then.After recipient's facsimile machine is received signal, signal restoring can be printed then, like this, the recipient will receive the copy of a former transmission file.--＞--＞--＞be modulated into analog signal--＞send into telephone network transmission that generates data-signal that sum up is exactly when sending: scan image to digital Information Compression; During reception: receive analog signal from telephone network--＞be demodulated to digital signal--＞decompress(ion) digital signal becomes initial picture signal--＞printing.

Existing fax sending and receiving normally carries out on independent facsimile machine, can not be connected with miscellaneous equipment, and this brings inconvenience to a certain extent.

(3) utility model content

Technical problem to be solved in the utility model is to provide a kind of auxiliary fax sending and receiving device.

Described auxiliary fax sending and receiving device comprises:

One is used to send the off-hook instruction and is dial-up connection to telephone network transmission fax, and the dialing responder module that sends off-hook and reply instruction and receive faxes;

One is used to carry out the circuit for answering of off-hook instruction;

One is used to fax fsk signal modulation module and fsk signal demodulation module that interactive information replys and transmit;

One the encode document coding module of generation coded data of document of will fax when being used to send fax;

One is used to send the QAM signal modulation module that when faxing coded data is modulated to audio signal;

One is demodulated into audio signal when being used to receive faxes the QAM signal demodulation module of coded data;

One is decoded as coded data when being used to receive faxes the document decoder module of fax document;

And a linear coupler, an end connects fsk signal modulation module, fsk signal demodulation module, QAM signal modulation module and QAM signal demodulation module respectively, and the other end connects public telephone network.

Further, described linear coupler is connected through the USB passage with fsk signal modulation module, fsk signal demodulation module, QAM signal modulation module and QAM signal demodulation module respectively.

Further, described circuit for answering is connected through the USB passage with the dialing responder module.

FSK of the present utility model (Frequency-shift keying) refers to frequency shift keying, goes the frequency of modulated carrier exactly with digital signal, is to use than a kind of modulation system early in the message transmission.QAM (Quadrature Amplitude Modulation) the friendship amplitude modulation(PAM) of making a comment or criticism is a kind of modulation system two enterprising line amplitude modulation of quadrature carrier.

Fsk signal modulation module of the present utility model, fsk signal demodulation module, QAM signal modulation module and QAM signal demodulation module, dialing responder module, document coding module, document decoder module can be solidificated in a certain general purpose computing device in the software and hardware combining mode.

Auxiliary fax sending and receiving device of the present utility model can be realized public telephone network (PSTN) and general purpose computing device are coupled together, realize area of computer aided fax sending and receiving function.

(4) description of drawings

Fig. 1 is the theory structure block diagram of the described auxiliary fax sending and receiving device of embodiment.

(5) embodiment

Below by embodiment, and in conjunction with the accompanying drawings, the utility model is described in further detail.

As shown in Figure 1, a kind of auxiliary fax sending and receiving device comprises:

One is used to carry out the circuit for answering of off-hook instruction;

Described linear coupler is connected through the USB passage with fsk signal modulation module, fsk signal demodulation module, QAM signal modulation module and QAM signal demodulation module respectively.

Described circuit for answering is connected through the USB passage with the dialing responder module.

Workflow of the present utility model is:

One, sends the method for fax

The dialing responder module sends off-hook instruction and is dial-up connection to telephone network, replys and transmits by fsk signal modulation module and the fsk signal demodulation module interactive information of faxing; The document coding module document of will faxing is encoded, and QAM signal modulation module is modulated to audio signal with coded data, and audio signal is sent to the other side on the public telephone network by linear coupler then.

The method of two, receiving faxes

As when incoming call fax, the dialing responder module sends off-hook and replys instruction and receive faxes, and replys and transmits by fsk signal modulation module and the fsk signal demodulation module interactive information of faxing; Carry out data demodulates by the audio signal that linear coupler transmits by QAM signal demodulation module, the data after the demodulation generate the fax document by document decoder module decoding back.

Claims

1, a kind of auxiliary fax sending and receiving device is characterized in that: described auxiliary fax sending and receiving device comprises:

One is used to carry out the circuit for answering of off-hook instruction;

2, auxiliary fax sending and receiving device according to claim 1 is characterized in that: described linear coupler is connected through the USB passage with fsk signal modulation module, fsk signal demodulation module, QAM signal modulation module and QAM signal demodulation module respectively.

3, auxiliary fax sending and receiving device according to claim 1 and 2 is characterized in that: described circuit for answering is connected through the USB passage with the dialing responder module.