JPH09247291A - Facsimile equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to stop sound-recording operation by sending a specific DTMF signal out before receiving operation is performed and placing the remote maintaining function of an automatic answering telephone in a parent-child telephone connection state in operation. SOLUTION: In a parameter memory 4 of the facsimile equipment 1, a permutation of symbols with which the DTMF(dual tone multifrequency) signal for stopping the automatic answering telephone function of a telephone set 13 connected as a parent telephone is registered. When a calling signal from a line is detected and a CNG detection part 104 detects a CNG signal, a DTMF generation part 102 generates for the DTMF signal for stopping the automatic answering telephone function and sends it to the telephone set 13 through a network control part 11 before facsimile receiving operation is performed, thereby stopping the automatic answering telephone function of the telephone set 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile apparatus which automatically switches connection with a telephone, and more particularly to prevention of malfunction.

[0002]

2. Description of the Related Art As disclosed in, for example, Japanese Unexamined Patent Publication No. 62-116077, a facsimile machine and a telephone are connected to a same line like a parent-child telephone via a switch, and the telephone is received when receiving. A facsimile control method is used in which the facsimile machine is automatically switched. JP 62-11
According to the facsimile control method disclosed in Japanese Patent No. 6077, when a CNG detection circuit is connected to a telephone and the telephone bell is received and the CNG detection circuit detects a CNG signal indicating facsimile communication, the switching device is facsimiled. I am trying to switch to the device. When a telephone having an answering machine function is used as the telephone and the user sets the telephone to go out and goes out, the telephone first reacts when there is a call signal (ringing). Thereafter, when the calling side is a facsimile machine, the telephone is switched to a facsimile machine, and the facsimile machine detects a CNG signal and performs facsimile reception. Also, if the calling side is a telephone, the telephone can receive and record a message using the answering machine.
The facsimile machine does not have to receive it.

[0003]

However, according to the automatic switching method between the telephone and the facsimile machine, when the calling side is the facsimile machine, if the CNG signal is detected while the telephone is answering the telephone, the facsimile machine will be sent. Because of the switching, the phone may record the communication sound at that time.

The present invention has been made to solve the above disadvantages, and a predetermined DTM is provided before a receiving operation.
It is an object of the present invention to obtain a facsimile apparatus which can send a F signal, operate a remote control function of an answering machine connected to a parent-child telephone, and stop a recording operation.

[0005]

In the facsimile apparatus according to the present invention, a permutation of symbols capable of creating a DTMF signal for stopping the answering machine function of a telephone connected as a parent-child telephone in advance is registered, and the facsimile from the line is registered. When the calling signal is detected and the CNG signal is detected, a DTMF signal is sent to the telephone connected as a parent and child telephone to stop the answering machine function before the facsimile receiving operation is executed.

When the dial tone is not detected after the CNG signal is detected, it is desirable to send a DTMF signal to the telephone connected as a parent / child telephone to stop the answering machine function.

Further, it is desirable to open the direct current when a ringback tone is detected after the DTMF signal is transmitted.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION According to the present invention, a control unit for executing a modem function of a G3 facsimile machine and various processes to a modem section of a facsimile machine to which a telephone is connected, and a control section transmitting / receiving a transmission procedure signal. Low speed modem (V.21 modem) for transmitting and receiving and high speed modem (V.17, V.33, V29, V27t for transmitting and receiving image information)
er), a DTMF generator for generating a DTMF signal, a CNG detector for detecting a CNG signal, a ton detector for detecting a dial tone, and a ringback tone for detecting a ringback tone. And a detector. Further, in the parameter memory of the facsimile apparatus, a permutation of symbols capable of creating a DTMF signal for stopping the answering machine function of a telephone connected in advance as a parent / child telephone is registered.

Then, the call signal from the line is detected to detect the CN.
When the C detection signal is detected by the G detection unit, the DTMF generation unit generates a DTMF signal for stopping the answering machine function and sends the DTMF signal to the telephone via the network control unit before executing the facsimile reception operation. Stop Noh.

After the CNG detector detects the CNG signal, when the tone detector does not detect the dial tone, a DTMF signal is sent to the telephone connected as a parent / child telephone to provide an answering machine function. Stop it to prevent erroneous calls from a fax machine with a push button contract.

Further, when a ring back tone is detected after the DTMF signal is transmitted, the direct current is opened immediately, and the operation is immediately stopped when an erroneous call is made by a facsimile machine having a push button contract.

[0012]

1 is a block diagram showing the main construction of a facsimile apparatus according to an embodiment of the present invention. As shown in the figure, the facsimile apparatus 1 includes a main control section 2 for executing control of the entire apparatus and facsimile transmission control, a control processing program executed by the main control section 2, and various data necessary for executing the processing program. System memory 3 for storing various information such as a main area of the main control section 2, a parameter memory 4 for storing various information unique to the G3 facsimile machine, and various keys and switches necessary for transmission and reception. And an operation display unit 5 including an LCD display, a scanner 6 for reading an original at a predetermined reading density, a plotter 7 for forming an image on a recording sheet at a predetermined recording density, and a code compression process for an image signal. Encoding / decoding unit 8 that executes and decodes the image information that has been code-compressed to the original image
The image storage unit 9 stores a large number of code-compressed image information, the modem 10 and the network control unit 11.

The modem 10 includes a control unit 101 for executing the modem function of the G3 facsimile machine and various processes.
Control unit transmission procedure Low-speed modem (V.21 modem) for transmitting / receiving signals and high-speed modem (V.17, V.33, V29, V27te) mainly for transmitting / receiving image information
Along with r), a DTMF generator 102 for generating a DTMF signal, a ringing signal detector 103 for detecting a ringing signal from the line sent from the network controller 11, a CNG detector 104 for detecting a CNG signal, and a dial-to- Tone detector 105 for detecting a ring tone, ring back tone detector 106 for detecting a ring back tone, CNG detection timer 107, and a tone to monitor the on / off time of the dial tone. It has a detection timer 108 and a ringback tone detection timer 109, and has a CNG signal, a dial tone,
A signal such as a ringback tone can be detected. A telephone 13 is connected to a network control unit 11 that connects the facsimile apparatus 1 to the line 12.

As shown in the circuit diagram of FIG. 2, the network control unit 11 has a ringing signal detection unit 111 for converting a ringing signal (ringing) into a digital signal, a DC open state when it is OFF, and a DC closed state when it is ON. The switch 112 for controlling DC open / close and the switch 1 for connecting the telephone 13 and the line 12 when turned off and disconnecting the telephone 13 and the line 12 when turned on
13, a DC supply unit 114 for detecting on-hook / off-hook of the telephone 13 when the switch 113 is on and the telephone 13 and the line 12 are disconnected.
A line signal path 115 that sends a line signal such as a CNG signal to the modem 10 when the switch 112 is in the OFF state and a DC open state, and a dial tone and a ring back when the switch 112 is in the ON state and the DC closed state. A line signal path 116 for sending a line signal such as a tone to the modem 10.

In the parameter memory 4 of the facsimile apparatus 1, a permutation of symbols capable of creating a DTMF signal for stopping the answering machine function of the telephone set 13 which is previously connected as a parent and child phone by the operation display section 5, for example, the answering machine function. Remote control number and then the remote control mode.
The number for forcibly ending the command is registered. Also,
In the standby state, both the switch 112 and the switch 113 of the network control unit 11 are off.

After the call signal is detected by the facsimile apparatus 1 configured as described above, the detection of the CNG signal is started, and when the CNG signal is detected, the DC is closed and the dial tone is detected. When a dial tone is not detected, a pre-registered DTMF signal is transmitted, and then a ring back tone is detected. Only when the ring back tone is not detected, the facsimile reception operation is performed. The operation will be described with reference to the flowchart of FIG.

First, in the standby state, the ringing signal detection unit 104 of the modem 10 monitors the digital signal output from the ringing signal detection unit 111 of the network control unit 11, and monitors whether there is a ringing signal from the line 12. (Step S1). At this time, the tone detection filter of the modem 10 is cut off except in the vicinity of 1100 Hz. When there is a call signal from the line 12 and the call signal is input from the network control unit 11 via the line signal path 115 and detected by the call signal detection unit 104, the control unit 101 causes the CNG detection unit 104 to detect the CNG signal. At the same time, the CNG detection timer 107 is started (step S3). Although the detection of the CNG signal is started, when the CNG signal is not detected by the CNG detection unit 104 and the CNG detection timer 107 times out, the process is ended and the process returns to the standby state again (steps S4 and S5).

When the CNG detection unit 104 detects a CNG signal before the CNG detection timer 107 times out, the control unit 101 turns on both the switch 112 and the switch 113 of the network control unit 11 to perform DC connection. (Step S6). At this time, the tone detection filter of the modem unit 10 is set for each country so that it is cut except in the vicinity of the frequency of the dial tone. Then, the control unit 1
01 starts the detection of the dial tone input to the tone detection unit 105 via the line signal path 116 of the network control unit 11 and simultaneously starts the tone detection timer 106 (steps S7 and S8). . When the dial tone is detected before the tone detection timer 106 times out (steps S9 and S10), the control unit 101 causes the switch 112 to operate.
And the switch 113 are both turned off to release the direct current, the process is terminated, and the process returns to the standby state (step S17).

When the tone detection timer 106 times out without detecting the dial tone (steps S9 and S1)
0), the control unit 101 is the ringback tone detection unit 106.
The ringback tone detection is started, and a DTMF signal for stopping the answering machine function is generated and sent from the DTMF generating unit 103 in accordance with the sequence of symbols registered in advance (step S12). At this time, the tone detection filter of the modem unit 10 is designed to cut off the ringback tone except for frequencies near the ringtone determined by each country. D
When the transmission of the TMF signal is completed, the ringback tone detection timer 108 is started (step S1).
3). When the ringback tone is detected before the ringback tone detection timer 108 times out (steps S14 and S15), the control unit 101 turns off both the switch 112 and the switch 113 to release the direct current, and the processing is performed. Upon completion, the process returns to the standby state (step S17). Where D
It is also possible to confirm whether or not the ringback tone is detected each time one TMF signal is transmitted, and release the direct current and terminate the processing when the ringback tone is detected.

When no ringback tone is detected and the ringback tone detection timer 108 times out (steps S14 and S15), the control unit 101 performs the facsimile reception operation by the low speed modem or the high speed modem, and the communication ends. After that, the direct current is released and the process ends (step S
16, S17).

In the above embodiment, the tone detector 105 is provided in the modem 10, but the tone detector 105 may be provided separately from the modem 10. Also,
The DTMF generator 102 may also be provided separately from the modem 10.

In the above embodiment, when the CNG signal is detected after the ringing signal is detected, the DC tone is closed to detect the dial tone, and when the dial tone is not detected, the registration is performed in advance. Although the DTMF signal for stopping the answering machine function is transmitted according to the permutation of the displayed symbols, the DTMF signal may be immediately transmitted after the CNG signal is detected and the direct current is closed.

[0023]

As described above, according to the present invention, a permutation of symbols capable of creating a DTMF signal for stopping the answering machine function of a telephone connected in advance to a facsimile machine as a parent-child telephone is registered, and the sequence from the line is registered. When the call signal is detected and then the CNG signal is detected, the DT with an arrangement for stopping the answering machine function on the telephone connected as a parent and child telephone before executing the facsimile reception operation.
Since the MF signal is generated and sent to stop the answering machine function of the telephone, it is possible to prevent useless recording by the answering machine function.

Also, after detecting the CNG signal, when the dial tone is not detected, a DTMF signal is sent to the telephone connected as a parent and child telephone to stop the answering machine function, and a push button contract is made. It is possible to prevent an erroneous call from being made by the facsimile device.

Further, when the ringback tone is detected after the DTMF signal is transmitted, the direct current is immediately opened so that the operation can be immediately stopped when the facsimile device having the push button contract erroneously makes a call. it can.

[Brief description of drawings]

FIG. 1 is a block diagram showing the main configuration of a facsimile apparatus according to an embodiment of the present invention.

FIG. 2 is a circuit diagram showing a configuration of a network control unit of the above embodiment.

FIG. 3 is a flowchart showing the operation of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Facsimile apparatus 2 Main control section 3 System memory 4 Parameter memory 10 Modem 11 Network control section 12 Line 13 Telephone 101 Control section 102 DTMF generation section 103 Call signal detection section 104 CNG detection section 105 Tone detection section 106 Ringback -Detector

Claims (3)

[Claims] 1. When a permutation of symbols capable of creating a DTMF signal for stopping an answering machine function of a telephone connected as a parent-child telephone is registered in advance and a call signal from a line is detected to detect a CNG signal. A facsimile machine characterized by transmitting a DTMF signal to a telephone connected as a parent and child telephone to stop an answering machine function before executing a facsimile receiving operation. 2. The facsimile apparatus according to claim 1, wherein when a dial tone is not detected after detecting the CNG signal, a DTMF signal is sent to a telephone connected as a parent / child telephone to stop the answering machine function. 3. A direct current is opened when a ringback tone is detected after the DTMF signal is transmitted.
Alternatively, the facsimile apparatus according to item 2.