JPH05344263A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To provide a facsimile equipment which can correctly detect an inputted number at the time of executing a call operation by means of a telephone unit connected to an external part. CONSTITUTION:A dial detection circuit 36 and a key signal detection circuit 3 detect the dial number inputted from the telephone set 12 installed outside at the time of a call. A polarity inversion detection circuit 35 detects polarity inversion showing that an incoming call to an opposite terminal equipment is in existence and this detection time is judged to be the termination time of a dial signal inputted from the telephone set 12. Then, a subsequent number detection operation is prohibited. Thus, the detection of a pseudo dial number generated during the call/communication can be prevented, and the dial number can be detected more correctly.

Description

Detailed Description of the Invention

[0001]

The present invention does not have a built-in telephone function,
The present invention relates to a facsimile apparatus that switches a connection of a public telephone line and transmits a facsimile signal such as image data after a calling operation by an external telephone.

[0002]

2. Description of the Related Art Generally, many facsimile machines have a built-in telephone, and this built-in telephone is used to perform a calling operation. Further, recently, a facsimile apparatus that does not have a built-in telephone and executes only a facsimile communication function is becoming widespread for home and personal use. In such a facsimile machine, a commercially available telephone is connected to a public telephone line via the facsimile machine. This external telephone is used to perform a calling operation, and after the call is received by the called facsimile machine, the connection of the public telephone line is switched to the facsimile machine side, and then the original is transmitted.

[0003]

In such a facsimile apparatus, the telephone set is directly connected to the public telephone line, and the facsimile apparatus receives dial pulses and tone signals (DTMF signals) output from the telephone set. No detection circuit for detecting is provided.

Therefore, it is inconvenient because it is impossible to perform a display for confirming the dial number input at the time of making a call or to create a communication result table based on such an input number.

An object of the present invention is to provide a facsimile apparatus which can accurately detect an input number when a calling operation is performed by a telephone connected to the outside.

[0006]

According to the present invention, there is provided facsimile communication means for transmitting and receiving image data through a public telephone line, and a telephone for performing a calling operation is connected to the public telephone line. In a facsimile device that connects a public telephone line to the facsimile communication means after a calling operation by a telephone to transmit and receive image data, a number detecting means for detecting a signal representing a telephone number from the telephone and the public telephone line are connected. Polarity reversal detection means for detecting the reversal of the direction of the flowing current, a memory for storing the number detected by the number detection means, and a number detected by the number detection means at the time of calling operation by the telephone and stored in the memory. , When the reversal of the current due to the incoming of the called terminal device is detected after the calling operation is completed, the retrieval of the detected number by the number detecting means is prohibited. A facsimile apparatus which comprises a control means for.

[0007]

According to the present invention, when a call is made using a telephone connected to the outside, a signal indicating the telephone number from the telephone, such as a dial pulse or a tone signal, is detected by the number detecting means, and this detection is performed. The assigned number is stored in the memory. After the calling operation, when the reversal of the direction of the current flowing through the public telephone line is detected by the incoming of the called terminal device, the polarity reversal detecting means prohibits the detection of the detected number from the number detecting means.

Therefore, by displaying the numbers stored in the memory, it is possible to immediately determine the occurrence of a number input error at the time of calling, and to prepare a communication result table or the like based on the stored numbers. be able to. This improves the reliability of facsimile communication. In addition, since the number detection operation is prohibited after the line connection with the called terminal device, it prevents the detection of pseudo dial signals generated during a call / communication and false operation of the hook switch of the telephone. It is possible to accurately detect the input number at the time of calling.

[0009]

1 is a block diagram showing the basic construction of a facsimile apparatus 10 according to an embodiment of the present invention. The facsimile machine 10 is connected to a facsimile machine on the other side through a public telephone line 11 and a switch (not shown),
It transmits and receives a facsimile signal including image data. Further, the facsimile apparatus 10 is configured to include only various circuits described below for performing facsimile communication, and a telephone 12 for performing a telephone call is externally connected via a transmission control circuit 14 described below.

The main control circuit 13 includes a central processing unit (C
PU) and the like, and controls the entire facsimile device 10. The transmission control circuit 14 includes a facsimile transmission / reception circuit 31 for transmitting / receiving image data, which will be described later, and controls transmission of image data to the public telephone line 11 and reception of image data received from the public telephone line 11. Control, line connection control corresponding to the calling operation from the telephone 12, line connection control corresponding to the call signal from the exchange, and the like are performed. The memory 15 stores the dialed number of the other party input from the telephone 12 according to the procedure described later, and can be appropriately read by the control of the main control circuit 13.

The reading device 16 is a CCD (charge coupled device).
And the like, which is configured to include a photoelectric conversion element, optically reads a document to be transmitted, converts it into an electric signal, and encodes it.
Give to. The encoding circuit 17 performs binarization processing on the analog image signal of the original read by the reading device 16 and encodes it as digital image data. Transmission buffer circuit 1
Reference numeral 8 controls the transmission timing and the transmission speed of the encoded digital image data according to a predetermined format and outputs it to the transmission control circuit 14.

Further, the transmission buffer circuit 19 controls the reception timing, adjusts the reception speed, etc. of the received image data according to a predetermined format and outputs the image data to the decoding circuit 20. The decoding circuit 20 decodes the received digital image data and supplies it to the recording device 21. The recording device 21 prints out the decoded image data on a recording paper such as a thermal recording paper using a printing means such as a thermal head (not shown).

The display control circuit 22 performs display control for displaying an operating state such as an input telephone number on a display device 23 composed of, for example, a liquid crystal display device. The communication result creating circuit 24 is a circuit for creating a communication result table having predetermined contents, such as a date, a required transmission time, and a destination telephone number. The key operation unit 25 includes keys for inputting various operation modes such as a start key for instructing the facsimile device 10 to start transmission and a stop key for stopping the operation.

FIG. 2 is a block diagram showing the circuit configuration of the transmission control circuit 14 described above. As described above, the telephone 12 is connected to the facsimile machine 10 via the connection terminals 30a and 30b of the transmission control circuit 14. The facsimile transmission / reception circuit 31 is a circuit that transmits / receives image data, and the line control circuit 32 controls whether the public telephone line 11 is connected to the facsimile transmission / reception circuit 31 or the telephone 12. The image data is
After the calling operation from the telephone 12, the line control switch 32 controls the line switch 33 to switch to the facsimile transmission / reception circuit 31 side for transmission.

The hook detection circuit 34 detects the ON / OFF state of the hook switch of the telephone 12, and the polarity reversal detection circuit 35 monitors the direction of the current flowing through the public telephone line 11 to make a call or an incoming call which will be described later. The reversal of the direction of current flow, that is, the polarity reversal is detected. The dial detection circuit 36 and the push signal detection circuit 37 detect the telephone number, which is the terminal number of the other party, which is input as a dial pulse or a push signal (tone signal) from the telephone 12. The detected number is stored in the memory 15 under the control of the main control circuit 13 via the line control circuit 32. The incoming call detection circuit 38 detects the incoming call signal transmitted from the exchange based on the calling operation of the other terminal device.

FIG. 3 is a flow chart showing the operation when the telephone 12 makes a call, and FIG. 4 is a timing chart showing the operation when the telephone 12 makes a call. In step a1, for example, when a handset (not shown) is picked up to make a dial call and goes into an off-hook state, the hook signal is turned off (time t1) as shown in FIG. 4 (1), and the public telephone line 11 is turned on. The polarity inversion detection circuit 35 starts operating (see FIG. 4 (3)).

At step a2, it is judged whether polarity reversal is detected. Step a if not detected
3 by the dial detection circuit and the push signal detection circuit 37 as shown in FIG.
The dial signal input from 2 is detected, and step a
The number detected in 4 is stored in the memory 15 and
It is displayed on the display device 23.

When the polarity reversal is detected in step a2, that is, at time t2 in FIG. 4, the incoming call is made to the telephone or facsimile machine which is the called terminal device,
When it is detected that the direction of the current flowing through the public telephone line 11 is reversed (see FIGS. 4 (2) and 4 (3)), step a
5, the number detecting operation by the dial detecting circuit 36 and the push signal detecting circuit 37 is prohibited.

As described above, according to the present embodiment, in the facsimile device 10 to which the external telephone 12 can be connected, the end point of the dial signal output from the telephone 12 is
By making a judgment by detecting the polarity reversal indicating that the other party has arrived, it is possible to prevent the detection of a pseudo dial signal that occurs during a call or during communication, and it is possible to detect an accurate dial number. As a result, it is possible to more accurately create a confirmation by displaying the input telephone number at the time of calling and a communication result table created after the end of communication.

[0020]

As described above, according to the present invention, when a calling operation is performed using a telephone connected to the outside, a signal indicating a telephone number from the telephone, such as a dial pulse or a tone signal, is detected by the number detecting means. The detected number is stored in the memory, so by displaying the number stored in the memory, it is possible to immediately determine the occurrence of a number input error when making a call. A communication result table or the like can be created based on the stored number. This improves the reliability of facsimile communication.

After the line connection with the called terminal device,
Since the number detection operation is prohibited, it is possible to prevent the detection of pseudo-dial signals that occur during a call or communication and pseudo-dial signals that occur due to a mistaken operation of the telephone hook switch, etc. It becomes possible to detect.

[Brief description of drawings]

FIG. 1 is a facsimile device 10 according to an embodiment of the present invention.
3 is a block diagram showing the basic configuration of FIG.

2 is a block diagram showing a circuit configuration of a transmission control circuit 14 shown in FIG.

FIG. 3 is a flowchart showing an operation of the facsimile device 10 when making a call.

FIG. 4 is a timing chart showing the operation of the facsimile device 10 when making a call.

[Explanation of symbols]

 10 Facsimile device 11 Public telephone line 12 Telephone 13 Main control circuit 14 Transmission control circuit 15 Memory 22 Display control circuit 23 Display device 31 Facsimile transmitter / receiver circuit 32 Line control circuit 33 Line changeover switch 34 Hook detection circuit 35 Polarity inversion detection circuit 36 Dial detection Circuit 37 Push signal detection circuit 38 Incoming detection circuit

Claims (1)

[Claims] 1. A facsimile communication means for transmitting and receiving image data via a public telephone line is provided, and a telephone for performing a calling operation is connected to the public telephone line. After the calling operation by the telephone, the public telephone is connected. In a facsimile apparatus for connecting a line to the facsimile communication means for transmitting and receiving image data, a number detecting means for detecting a signal representing a telephone number from the telephone and a reversal of a direction of a current flowing through the public telephone line. Polarity reversal detection means, a memory for storing the number detected by the number detection means, and a call detection operation by the telephone, the detection number acquired by the number detection means is stored in the memory and is called after the call operation is completed. When the reversal of the current due to the incoming of the side terminal device is detected,
A facsimile apparatus comprising: a control unit that prohibits the detection of the detected number by the number detection unit.