KR940003973B1 - Fax device and control method for transmission function - Google Patents

Abstract

The method is for a facimile having manual send function to start send operation automatically when a called state identification (CED) signal from a receiver is received. The apparatus includes a CED signal detection transformer (12) for detecting CED signal transmitted from external facimile, and a CED detector (13) including limiters (23,24,25) connected to the secondary of the transformer (12) to limit input signal, an amplifier (26) for amplifying the output signal of the limiters; a filter (27) for band-pass filtering the output signal of the amplifier (26), and a decoder (28) for coding output signal of the filter.

Description

Fax machine and manual call control method with manual call function

1 is a block diagram schematically showing the configuration of a facsimile apparatus according to the present invention.

2 is a detailed configuration diagram of an embodiment of the CED detection transformer and CED detection unit according to the present invention.

3 is a flowchart illustrating a manual call control method of the present invention.

* Explanation of symbols for main parts of the drawings

1: relay unit 2: communication transformer

3: transmitting and receiving signal amplification unit 4: modulation demodulation unit

5 ring detection unit 6 off hook detection unit

7: I / O buffer unit 8: Central control (CPU)

9: memory 10: key pad

11 telephone 12 transformer for detecting CED

13: CED detection unit

The present invention relates to a manual sending function of a DMS facsimile, in particular, a facsimile having a manual sending function automatically detects a called state identification (CED) sound transmitted from a receiving side facsimile when transmitting an image such as a document to an external automatic receiving facsimile side and automatically. The present invention relates to a facsimile device and a transmission control method for performing a transmission operation.

In general, the facsimile communication method is divided into AA (automatic call / auto receive), MA (manual call / auto receive), AM (automatic call / manual receive), and MM (manual call / manual receive). In order to implement the MA (Manual Call / Auto Receive) function in the above-mentioned division, in the conventional case, when a document is transmitted to an external facsimile by manually sending it, the CED sound sent from the external facsimile user Can be transmitted only by pressing a separate operation button such as a start button. Therefore, not only do you occupy the call line unnecessarily until the user presses the start button, but also the loss of call charges occurs, and even when the user does not press the start button while listening to the CED sound due to immaturity of the user, the call is left unattended Of course, there was a problem that the transmission of the document itself is not made, as well as toll loss.

The present invention has been made to eliminate the above problems, and provides a facsimile apparatus configured to automatically perform a transmission operation when only a CED tone transmitted from a called party facsimile called by the user is detected without a user's separate operation. The purpose is to.

Another object of the present invention is to provide a method for controlling the transmission of a facsimile which automatically performs a transmission operation when a CED sound generated by an external facsimile is detected using the facsimile apparatus as described above.

In order to achieve the above object, the present invention provides a relay means connected to a telephone line for facsimile communication, a communication transformer connected to the relay means, transmit and receive signal amplification means connected to the transformer, and connected to the transmit and receive signal amplification means. Facsimile demodulation means, ring signal detection means and hook-off detection means connected to said relay means, input / output buffer means connected to said ring signal detection means and hook-off detection means, and said modulation / demodulation means and input / output buffer means, A facsimile apparatus having a manual call function, comprising a central control means for controlling general operations, a memory means and a keypad connected to the central control means, and a telephone connected to the relay means. Withdraw the CED tone sent by CED transformer for detecting, and is connected to the secondary side of said transformer for detecting CED amplifying and filtering the input signal, characterized in that two quaternized by further comprising: a CED detection means for applying to said input and output buffer means.

Further, in order to achieve another object of the present invention, a relay means connected to a telephone line for facsimile communication, a communication transformer connected to the relay means, transmit and receive signal amplification means connected to the transformer, amplify the transmit and receive signal Modulation / demodulation means connected to the means, ring signal detecting means and hook-off detecting means connected to said relay means, input / output buffer means connected to said ring signal detecting means and hook-off detecting means, and connected to said modulation / demodulation means and input / output buffer means, A central control means for controlling the overall operation of the facsimile, a memory means and a keypad connected to the central control means, a telephone connected to the relay means, and a CED sound transmitted by an external facsimile connected to the relay means 1 CED detection transformer withdrawn and the CED detection transformer A transmission control method using a facsimile apparatus having a CED detection means connected to a secondary side of a former to amplify, filter, binarize, and apply the input signal to the input / output buffer means. A first step of determining a state, a second step of calling an external facsimile in an off hook state, determining whether a CED signal transmitted from the external facsimile is detected for a predetermined time, and if not detected within a predetermined time, A third step of repeating the hook switch determination process, a fourth step of immediately setting the relay means to the facsimile mode when a CED signal is detected, a fifth step of performing the facsimile transmission mode, and setting the relay means to the telephone mode It is characterized in that performed by the sixth step.

1 is a block diagram schematically showing the configuration of a facsimile apparatus according to the present invention, in which 1 is a relay unit, 2 is a communication transformer, 3 is a transmission / reception signal amplification unit, 4 is a modulation / demodulation unit, 5 is a ring detector, 6 is The off-hook detection unit, 7 is an input / output buffer unit, 8 is a central control unit (CPU), 9 is a memory unit, 10 is a keypad, 11 is a telephone, 12 is a CED detection transformer, and 13 is a CED detection unit.

As shown in the drawing, the facsimile apparatus configuration of the present invention is connected to a telephone line connected to an external public telecommunication network (PSTN) and relay unit 1 for selecting a facsimile mode and a telephone mode by switching a loop connection through a switch switching. ), A communication transformer (2) connected to the relay unit, a transmit / receive signal amplifier (3) for amplifying a signal of a line connected to and transmitted from the transformer, and a modulation of input / output signals connected to the transmit / receive signal amplifier ( A modulation and demodulation unit 4 for performing modulation and demodulation, a ring signal detection unit 5 connected to the relay unit to detect a ring signal, and an off hook connected to the relay unit an off-hook detection unit 6 for detecting a hook) signal, an input / output buffer unit 7 connected to the ring signal detection unit and an off-hook detection unit, and an input / output buffer unit and a modulation / demodulation unit A central processing unit (CPU) 8 for controlling overall operations of the facsimile, a memory unit 9 connected to the central control unit, and a central control unit connected to the central control unit to centralize input from a user for facsimile operation. A circuit for detecting CED is added to a conventional facsimile apparatus having a passive call function having a keypad 10 applied to a control unit and a telephone 11 connected to a relay unit together with the ring signal detector and the off hook detector. It is configured by.

The CED detection circuit employed in the present invention includes a CED detection transformer 12 connected to the relay unit 1, an input terminal of which is connected to a secondary side of the CED detection transformer, and an output terminal of the CED detection transformer 12. CED detection unit 13 connected to.

FIG. 2 is a detailed configuration diagram of one embodiment of the CED detecting transformer 12 and the CED detecting unit 13. In the drawing, 21 is a capacitor, 22 is a transformer, 23 is a resistor, 24 and 25 are zener diodes, and 26 is an amplifier. 27 is a band pass filter, and 28 is a binarization circuit.

As shown in the figure, the CED detection circuit according to the present invention connects the primary side of the CED detection transformer 22 to the capacitor 21 connected to the relay unit, and the resistor 23 and the zener diode (2) on the secondary side thereof. 24, 25) is connected to the limiter for limiting the output signal is applied, the non-inverting terminal is connected to the limiter and the output signal of the amplifier 26 connected so that the output signal is input to the inverting terminal is amplified The filter circuit 27 for passing only signals of a specific band among the signals is connected. The output terminal of the band pass filter 27 is configured by connecting a known binarization circuit 28 to binarize and convert the input signal level to the input / output buffer unit 7.

Therefore, when the CED sound transmitted by an external facsimile is applied to the relay unit 1 through a call line, it is detected as a binary signal by the CED detection circuits 12 and 13 and the input / output buffer unit 7 By applying to the central processing unit 8 through), the transmission operation is performed by the control of the central processing unit without any key operation.

FIG. 3 is a flow chart of the transmission control method of the present invention, in which a CED detection circuit as shown in FIG. 2 is added and is performed in a facsimile apparatus having a manual call function.

First, when the user sets the transmission document in the facsimile (31), the central control unit 8 determines whether the hook switch is ON or OFF based on the output signal of the off-hook detection unit 7. (32). If the result is on-hook state, it is determined again whether the originating method is automatic originating (38). If the automatic originating, the normal automatic originating mode is performed (39).

When the hook switch state determination result is off-hook, an external facsimile is called by the input telephone number. (33) Then, the output signal of the CED detection unit 13 is monitored and sent from an external counterpart facsimile for a predetermined time. It is determined whether the CED signal is detected (34). If it is not detected within the set time, it is determined that the self and the other side facsimile are not connected, and the hook switch state determination process and the external facsimile call process are repeated. However, when the CED sound is detected, the mode of the relay unit 1 is immediately set to the facsimile mode (35), and then the normal transmission operation is performed. (36) Thus, after the transmission operation is completed, the relay unit ( 1) is set to the telephone mode (37), and the execution is finished.

As described above, in the present invention, if only the CED tone transmitted from the called counterpart fax is detected, the user does not care whether the user picks up the phone or puts it down, and immediately enters the transmission operation without requiring the user's special operation.

Therefore, the present invention as described above has the effect of adding a simple circuit to the existing facsimile apparatus to greatly reduce the call loss, and improve the convenience of use.

Claims (3)

A relay means 1 connected to a telephone line for facsimile communication, a communication transformer 2 connected to the relay means, a transmit and receive signal amplification means 3 connected to the transformer, and the transmit and receive signal amplification means. A modulation / demodulation means (4) connected to the ring signal, a ring signal detecting means (5) and a hook-off detecting means (6) connected to the relay means, an input / output buffer means (7) connected to the ring signal detecting means and a hook-off detecting means; A central control means (8) connected to the modulation and demodulation means and an input / output buffer means, for controlling the overall operation of the facsimile, a memory means (9) and a keypad (10) connected to the central control means, and the relay means In a facsimile apparatus having a manual telephone call function having a telephone 11, the CED detection device is connected to the relay means 1 and draws out a CED sound sent by an external facsimile. Transformer (12); And CED detecting means 13 connected to the secondary side of the CED detecting transformer to amplify, filter, and binarize an input signal to apply to the input / output buffer means 8. Facsimile device with function The method according to claim 1, wherein the CED detecting means (13) comprises: limiters (23, 24, 25) connected to the secondary side of the CED detecting transformer (12) for restricting and applying a signal output; Amplification means (26) connected to the limiter; Filtering means 27 connected to the amplifying means and passing only a specific band of the amplified signal; And a converting means (28) connected to the filtering means for converting the input signal level by binarizing the signal. A relay means 1 connected to a telephone line for facsimile communication, a communication transformer 2 connected to the relay means, a transmit / receive signal amplification means 3 connected to the transformer, and a transmit / receive signal amplification means. A modulation / demodulation means (4), ring signal detecting means (5) and hook-off detecting means (6) connected to said relay means, input / output buffer means (7) connected to said ring signal detecting means and hook-off detecting means, and said modulation / demodulation A central control means 8 connected to the means and an input / output buffer means for controlling the overall operation of the facsimile, a memory means 9 and a keypad 10 connected to the central control means, and a telephone connected to the relay means; 11), the CED detection transformer 12 connected to the relay means 1 to extract the CED sound transmitted by an external facsimile, and the secondary side of the CED detection transformer. In the outgoing control method using a facsimile apparatus provided with a CED detecting means 13 for amplifying, filtering, and binarizing an input signal and applying it to the input / output buffer means 8, when a user sets a transmission document (31). A second step of determining (32) a hook switch state; Determining whether the CED signal transmitted from the external facsimile is detected for a predetermined time, and if it is not detected within the set time, repeating the first step hook switch determination process (32, 33, 34); (4) immediately setting the relay means to facsimile mode when a CED signal is detected; Performing a facsimile transmission mode (36); And setting the relay means to the telephone mode (37) by a sixth step.