JP3234846B2 - Facsimile machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

The present invention relates to a facsimile which can be connected to an external telephone.
It is related to a similiar device .

[0002]

2. Description of the Related Art Recently, home telephones composed of a master unit and a slave unit have become commercially available as home telephones.
As these functions, after calling from the outside line to the base unit, DTM
In some cases, a handset can be specified by an F signal and a call can be made between an outside line and the handset, and consideration is given to private communication.

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

[0004]

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

According to the present invention, an external telephone handset is specified.
An object of the present invention is to secure confidentiality of facsimile reception data after a call .

[0006]

SUMMARY OF THE INVENTION The present invention has a slave unit.
In a facsimile machine to which an external telephone can be connected,
If the external telephone answers the incoming call and is connected to the line
Signal to detect the specified signal that specifies the slave unit
Detecting means and detecting a CNG signal related to facsimile communication.
The CNG signal detecting means for outputting and the designated signal detecting means are
After detecting the designation signal designating the slave unit, the CN
When the G signal detecting means detects the CNG signal,
Data that is automatically received is recorded as confidential data.
And control means for controlling so as to remember
Facsimile machine.

[0007]

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

[0008] The CPU 101 is a system control unit.
Controls the entire device. The ROM 102 stores a control program for the CPU 101. RAM103
Is composed of an SRAM or the like and stores program control variables and the like. In addition, setting values registered by the operator, management data of the device, etc., and various work buffers are also stored in the RAM.
103 is stored. The image memory 104 stores the DR
It is composed of an AM or the like and stores image data.

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

A communication coding / decoding processing section (communication codec) 106 and a reading / recording coding / decoding processing section (read / recording codec) 107 perform coding / decoding of image data handled by the 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 for controlling transfer of image data.

A MODEM (modulator / demodulator) 113 modulates and demodulates a facsimile transmission / reception signal.
A U (network control device) 114 has a function of transmitting 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 NCU 114 and external telephone 116.
FIG. 3 is a circuit diagram showing a configuration of a connection portion of FIG.

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

From the current detection circuit 10, a signal for detecting the presence / absence of a current flowing in the line and a signal for outputting a change in the line current by a Hall element as an analog signal do not affect the characteristics of the line. It can monitor and monitor the situation and output it as a signal.

A signal from the current detection circuit 10 to know the presence / absence of the current flowing in the line enters the line status determination circuit 11, where the status of CI, HOOK, LPL0 / 1 (polarity) can be known. An analog signal from the current detection circuit 10 is input to the MODEM 113 via the SW 13.

When the receiving operation is started as a facsimile, the CML 12 and the SW 13 are controlled by the CPU 101, and the facsimile signal is given to the MODEM 113 through the dial pulse generating circuit 14 and the hybrid circuit 15 and the SW 13.

When a transmission operation is performed as a facsimile, a destination telephone number is transmitted by the dial pulse generation circuit 14, and then a signal is transmitted from the MODEM 113 to the subscriber line via the hybrid circuit 15.

FIG. 3 is a flowchart showing the reception control processing 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 subscribed line, the incoming signal is given to the external telephone 116, and the external telephone 116 receives an incoming call and is connected to the line. The operation of the external telephone 116 after this connection is diversified due to its function, but will not be described. However, there is a function of calling the slave unit from the master unit and communicating with the outside line by the DTMF signal from the outside line.

[0024] This function is that, when the outside party receives a call from the base unit of the external telephone and specifies a specific slave unit to talk to by the DTMF signal, the base unit interprets the contents of the DTMF signal and the specified terminal unit is designated. The line is connected to the slave unit.

Therefore, the 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 DTMF signal is analyzed by the MODEM 113 (S203). When the DTMF signal is confirmed to be a DTMF signal sequence for connecting a slave unit (S204), the connected slave unit is checked. Is stored in the RAM 103 (S205).

Thereafter, the CNG signal from the line is monitored by the current detection circuit 10 (S202). Then, when the other party performs facsimile transmission after the call, C
Since the NG signal is transmitted, when the CNG signal is detected (S202), the CML 12 and the SW 13 are set to the b side (S
206), DTM for specifying the connected slave unit
The information of the F signal string portion is read from the RAM 103, and if there is a slave unit designation (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.
5 is a method of a conventional facsimile machine. If no CNG signal is specified and only the CNG signal is detected, the reception is processed as normal reception (S210).

Although the description of FIG. 3 has been made on the assumption that the DTMF signal is input from an outside line,
The handset during a call can also send a DTMF signal using the key of its own phone while confirming with the other party, so that the facsimile can recognize the DTMF signal sequence specified by the handset.

[0030]

According to the present invention, the handset of the external telephone is
The received data after the call after the
Data is stored as data, so if a slave unit is specified
Confidentiality of received data
Play a fruit.

[Brief description of the 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 embodiment.

FIG. 3 is a flowchart illustrating reception control processing in the embodiment.

[Explanation of symbols]

 101: CPU, 102: ROM, 103: RAM, 104: image memory, 105: clock control unit, 106: encoding / decoding processing unit for communication, 107: encoding / decoding processing unit for reading / recording, 108: operation 109, image processing unit, 110, scanner, 111, printer, 112, line buffer, 113, MODEM, 114, NCU, 115, communication line, 116, external telephone.

Continuation of the front page (56) References JP-A-6-233000 (JP, A) JP-A-4-14962 (JP, A) JP-A-6-189029 (JP, A) JP-A-5-122485 (JP) JP-A-5-22540 (JP, A) JP-A-4-47759 (JP, A) JP-A-5-300283 (JP, A) JP-A-3-109855 (JP, A) 4-280565 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04N 1/32-1/36 H04N 1/42-1/44 H04N 1/00-1/00 108

Claims (3)

(57) [Claims] An external telephone having a slave unit can be connected to the telephone.
In the facsimile apparatus, the external telephone responds to the incoming call and is connected to the line.
When the specified signal for detecting the
Signal detecting means; CNG for detecting a CNG signal related to facsimile communication
Signal detection means; and the designation signal detection means outputs a designation signal for designating the slave unit.
After the detection, the CNG signal detecting means outputs the CNG signal.
Data is automatically detected when a signal is detected.
Control means for controlling storage as confidential reception data
And a facsimile machine having : 2. The control device according to claim 1, wherein the control means detects the designation detected by the designation signal detection means.
It is characterized in that the above-mentioned received data is stored in correspondence with the signal.
Facsimile machine 3. The method according to claim 1, wherein the designation signal is D
A facsimile machine characterized by being a TMF signal.