JPH08107488A - Facsimile equipment - Google Patents

Abstract

PURPOSE: To improve the confidentiality and the operability by storing a CNG signal to an image storage means corresponding to a slave set designation number as forced confidential reception signal when the CNG signal before facsimile reception is detected by a CNG signal detection means. CONSTITUTION: When an incoming signal reaches a subscriber line, an externally mounted telephone set 116 receives the call an connects to the line. When a DTMF signal arrives, a MODEM 113 analyzes the DTMF signal and confirms a DTMF signal string for slave set connection, the DTMF signal string to specify a connected slave set is stored in a RAM 103. When a CNG signal is detected, the information of the DTMF signal string to specify the connected slave set is read from the RAM 103 and when a slave set is designated, a confidential BOX corresponding to the slave set is set. Then the facsimile reception is processed forcibly as the confidential reception and the received image is stored in a storage memory 104.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile machine to which an external telephone can be connected.

[0002]

2. Description of the Related Art Recently, a home telephone including a base unit and a handset has become commercially available as a home telephone.
These functions include DTM after calling from the outside line to the base unit.
There is a device that allows the child device to be communicated with an outside line by specifying the child device by the F signal, and consideration is given to private phone calls.

Further, the facsimile apparatus can be connected to an external telephone such as an answering machine, and it is considered that the external telephone has priority to receive a call.

[0004]

However, in the above-mentioned conventional example, even if the master unit of the home telephone as an external telephone can be connected to the facsimile apparatus and the external line and the slave unit are connected as a private call, the facsimile reception at that time is not received. However, there is a drawback that the confidentiality is not maintained because printing is done randomly on the recording paper of the facsimile machine connected to the master unit.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a facsimile device to which an external telephone is connected and which can secure the confidentiality of facsimile reception.

[0006]

SUMMARY OF THE INVENTION The present invention provides a monitoring means for monitoring the current status of a line, a DTMF signal detecting means, and a D
TMF signal string determination means, DTMF signal string storage means,
In a facsimile apparatus having a CNG signal detecting means and an image storing means and capable of connecting an external telephone, when the external telephone is connected, when the external telephone is connected to a line and in a call state, From the line status obtained by the monitoring means, the DTMF signal detecting means detects the DTMF signal designating the slave unit of the external telephone and the DT.
By acquiring the slave unit designation number by the MF signal string determination means, the CNG signal before the subsequent facsimile reception is
From the line status obtained by the monitoring means, the CNG
When it is detected by the signal detecting means, the reception is stored in the image storing means as the forced confidential reception in correspondence with the slave unit designation number.

[0007]

1 is a schematic block diagram showing the structure of a facsimile apparatus according to an embodiment of the present invention.

The CPU 101 is a system control unit,
Control the entire device. The ROM 102 stores the control program of the CPU 101. RAM103
Is composed of SRAM or the like and stores program control variables and the like. In addition, the setting values registered by the operator, device management data, and various work buffers are also RAM
It is stored in 103. Further, the image memory 104 is a DR
It is composed of AM and stores image data.

The clock control unit 105 is composed of a real-time clock or the like, and generates time information of the facsimile machine.

A communication encoding / decoding processing unit (communication codec) 106 and a reading / recording encoding / decoding processing unit (reading / recording codec) 107 encode / decode image data handled by a facsimile apparatus. Perform processing.

The operation unit 108 is composed of a keyboard or the like and is used by an operator to perform various input operations.

The scanner 110 is a CS image sensor,
It is composed of a document transport mechanism or the like, which reads a document optically and converts it into electrical image data. This image data is subjected to correction processing by the image processing unit 109 and outputs high-definition image data.

The printer 111 is an LBP for recording received images and file data on recording paper.

The line buffer 112 is a line buffer used when controlling the transfer of image data.

A MODEM (modulation / demodulation device) 113 modulates / demodulates a transmission / reception signal of a facsimile, and is NC.
The U (network control device) 114 has a function of sending a selection signal (dial pulse or tone dialer) to the communication line 115, and performs an automatic incoming call operation and a line control operation by detecting a ringing tone. Also, an external telephone 116 can be connected.

FIG. 2 shows an NCU 114 and an external telephone 116.
FIG. 3 is a circuit diagram showing a configuration of a connection part of FIG.

The subscriber line from the modular terminal 17 is CM
External telephone 1 through L12, current detection circuit 10
16 is connected. The current detection circuit 10 is generally commercially available, and its details are omitted.

From the current detection circuit 10, the signal for knowing the presence / absence of the current flowing in the line and the signal for outputting the change of the line current as an analog signal by the hall element do not affect the characteristics of the line. It can be monitored and the situation is monitored and output as a signal.

A signal from the current detection circuit 10 for knowing the presence / absence of a current flowing through the line enters the line status judgment circuit 11 and the status of CI, HOOK, LPL0 / 1 (polarity) can be known. Further, the analog signal from the current detection circuit 10 is input to the MODEM 113 via the SW 13.

Further, when entering a receiving operation as a facsimile, the CML 12 and the SW 13 are controlled by the CPU 101, the dial pulse generating circuit 14 is bypassed, and the facsimile signal is given to the MODEM 113 via the hybrid circuit 15 and the SW 13.

Further, when the transmission operation is performed as a facsimile, the dial pulse generating circuit 14 sends out the telephone number of the destination, and then the MODEM 113 transmits a signal to the subscriber line through the hybrid circuit 15.

FIG. 3 is a flow chart showing the processing of reception control in this embodiment.

First, in the standby state, the CML 12 and the SW 13a are set (S201). Here, when an incoming signal arrives from the subscriber line, the incoming signal is given to the external telephone 116, and the external telephone 116 receives the call and is connected to the line. The operation of the external telephone 116 after this connection has a wide variety depending on its function, so that it is omitted. However, there is a function of calling the child device from the base unit by the DTMF signal from the external line and making a call with the external line.

This function is designated by the parent machine interpreting the contents of the DTMF signal when the other party of the external line receives a call from the parent machine of the external telephone and designates a specific child machine to talk to by the DTMF signal. It connects the line with the child device.

Therefore, this DTMF signal is monitored by the analog output signal of the current detection circuit 10 (S203).
At this time, the CNG signal is also monitored by the current detection circuit 10 (S202).

When the DTMF signal arrives, the MODEM 113 analyzes the DTMF signal (S203). When the DTMF signal sequence for connecting the slave unit is confirmed (S204), the slave unit to be connected is connected. The DTMF signal string portion for identifying the is stored in the RAM 103 (S205).

After that, the CNG signal from the line is monitored by the current detection circuit 10 (S202). Then, when the facsimile transmission is performed after the call from the other side, C
Since the NG signal is transmitted, when this CNG signal is detected (S202), the CML 12 and SW 13 are set to the b side (S
206), the DTM that identifies the connected child device
When the information of the F signal sequence portion is read from the RAM 103 and a slave unit is designated (S207), a confidential BOX corresponding to the slave unit is set (S208), and subsequent facsimile reception is forcibly processed as confidential reception, The received image is stored in the storage memory 104 (S209).

The method of extracting the confidentially received image is as follows.
This is a conventional facsimile machine method. If no CNG signal is specified and only the CNG signal is detected, it is processed as normal reception (S210).

In the above description of FIG. 3, the case where the DTMF signal is input from the outside line has been assumed, but
It is also possible for the slave unit in a call to issue a DTMF signal by the key of its own telephone while confirming with the partner so that the facsimile recognizes the slave unit-designated DTMF signal sequence.

[0030]

As described above, according to the present invention,
If an external telephone is connected to the fax machine,
When this external telephone is connected to the line and in a call state,
From the line status obtained by the monitoring means, the DTMF signal detecting means detects the DTMF signal designating the slave unit of the external telephone, and the DTMF signal string determining means obtains the slave unit designation number, whereby the subsequent facsimile reception is performed. The previous CNG signal, from the line status obtained by the monitoring means,
When it is detected by the CNG signal detecting means, the reception thereof is
By accumulating in the image storage means corresponding to the slave unit specified number as forced confidential reception, private reception of the external telephone with the slave unit to the slave unit can be automatically confidentially received, and confidentiality and operability are improved. There is an effect that can be improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention.

FIG. 2 is a circuit diagram showing a configuration of a connection portion between an NCU and an external telephone according to the above embodiment.

FIG. 3 is a flowchart showing a reception control process in the above embodiment.

[Explanation of symbols]

 101 ... CPU, 102 ... ROM, 103 ... RAM, 104 ... Image memory, 105 ... Clock control unit, 106 ... Communication encoding / decoding processing unit, 107 ... Read / record encoding / decoding processing unit, 108 ... Operation Reference numeral 109 ... Image processing unit, 110 ... Scanner, 111 ... Printer, 112 ... Line buffer, 113 ... MODEM, 114 ... NCU, 115 ... Communication line, 116 ... External telephone.

Claims (1)

[Claims] 1. Monitoring means for monitoring the current status of the line,
DTMF signal detection means, DTMF signal string determination means,
In a facsimile apparatus having a DTMF signal string storage means, a CNG signal detection means, and an image storage means and capable of connecting an external telephone, when the external telephone is connected, the external telephone is connected to a line. In the talking state, the DTMF signal for designating the slave unit of the external telephone is detected by the DTMF signal detecting means from the line status obtained by the monitoring means,
By acquiring the child machine designation number by the DTMF signal string determination means, the CNG before the subsequent facsimile reception is obtained.
When a signal is detected by the CNG signal detecting means from the line status obtained by the monitoring means, the reception of the signal is stored in the image storage means as a forced confidential reception corresponding to the slave unit designation number. Characteristic facsimile machine.