JP2895259B2 - Data communication device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION This invention is, connect the answering machine phone Allowed
The present invention relates to a functional data communication device .

[0002]

2. Description of the Related Art Conventionally, in a facsimile apparatus to which an answering machine is connected, when an incoming call is received from outside, first, the answering machine is activated, the reception of the facsimile control signal is monitored, and the reception of the facsimile control signal is confirmed. At this point, the operation shifts to the facsimile reception operation.

That is, in this facsimile apparatus, activation of an answering machine is detected by an off-hook detection circuit, and a signal received during the operation of the answering machine is monitored by a modem via a transformer, and when a CNG signal is confirmed, a CML signal is detected. To connect the line to the modem side, and start the facsimile reception operation.

[0004]

However, the above-mentioned conventional apparatus is effective only in the case of automatic transmission in which the transmitting side transmits CNG, and when the transmission side is in a non-signal state as in manual transmission, facsimile reception is performed. There was a drawback that the operation could not be shifted.

An object of the present invention is to provide a data communication device with an answering machine function that can obtain an appropriate data communication shift operation even when the transmission side is manual transmission.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a data communication apparatus to which an answering machine can be connected.
Switching means for connecting or disconnecting the machine to or from the line
When the hook state detecting means for detecting a hook state of the telephone answering machine, the answering machine is connected to the line
Monitor the signal on the line when
A silent state detecting means for detecting the silent state of the signal, the times
Upon receiving an incoming call from a line, the hook state detecting means
Detects off-hook of answering machine and detects the silent state
Means to detect the silence state, and then the hook state
The on-hook state of the answering machine is detected by the detecting means.
When it comes out, disconnect the answering machine from the line,
It has means for performing data communication .

[0007]

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

The CPU 1 is composed of a microprocessor, and is connected to a ROM 2, a RAM 3, and an SRAM 4,
The operation of the entire apparatus is controlled according to a program stored in the ROM 2.

The ROM 2 stores a control program for the CPU 1. The RAM 3 is a volatile memory and has a CP
Used as a work area for U1.

The SRAM 4 stores speed dial data and the like, and the stored contents are backed up even when the main power is turned off.

The following units are connected to the system bus of the CPU 1.

First, the recording unit 5 includes a thermal recording head and a recording paper transport system, and records a received image or records an image when copying a document.

The reading section 6 is composed of a CCD line sensor, a document conveying system and the like, and reads a document image.

The modem unit 7 modulates and demodulates communication image data and the like.

The NCU 8 selectively connects the telephone line 9 to a facsimile machine or a telephone 10.

The operation unit 11 has ten keys, function keys, and the like, and performs various inputs.

The display 12 is composed of an LCD or the like.
The display of the current time and the operation state are performed.

FIG. 2 shows the operation unit 11 and the display 12.
It is a top view which shows the operation panel provided with.

The operation unit 11 includes an image quality mode switch 14 for controlling an image quality mode, a communication mode switch 15 for controlling a communication mode, a start switch 16 for starting facsimile communication and other predetermined operations, and facsimile communication and other predetermined operations. , A stop switch 17 for stopping the operation, a numeric keypad 18 used for inputting a telephone number and other predetermined data, and a redial key 20.
Further, the image quality mode switch 14 and the communication mode switch 15 are provided with an indicator for displaying the setting state.

The LCD panel 19 is provided with the display 1
2.

FIG. 3 is a circuit diagram showing the configuration of the NCU 8.

The NCU 8 is a CML 21 for switching the line 9 between the telephone 10 with the answering machine function and the modem unit 7.
And a detection circuit 22 for detecting a hook state of the telephone 10
A transformer 23 for monitoring a silent state between the line 9 and the telephone 10; a transformer 24 for transmitting a facsimile signal between the line 9 and the modem unit 7;
And a CNG relay 25 for switching the input to the modem section 3 and 24.

FIGS. 4 and 5 show the CPU having the above configuration.
3 is a flowchart showing the operation of FIG.

This procedure is stored in the ROM 2 as a control program for the CPU 1.

First, in the state of waiting for an incoming call, the CPU 1 monitors whether or not the telephone is in the answering machine mode and whether or not the call signal Ci is received (S1, S2).

Here, if the answering mode is not the answering machine mode, the processing shifts from the incoming call waiting state to another processing (not shown). If the call signal Ci is not received, the state of waiting for an incoming call is maintained.

If the call signal Ci is received in the answering machine mode, the hook condition is detected by the hook condition detecting circuit 22, and if it is off hook, it is determined that the answering machine has been activated (S3). In order to monitor the line 9 by the transformer 23, the CNG relay 25 is switched to the ON side, and the transformer 23 is connected to the modem unit 7 (S4).

Next, a timer T5 is set (S5).
The timer T5 normally sets a time for a response message that can be recorded on an answering machine, for example, 16 seconds, and during that time, monitors the status of the CNG signal and the answering machine.

When an on-hook is detected (S
6), it is determined that the answering machine 10 has disconnected the line 9, and the process returns to standby.

In the off-hook state, the transformer 23
If a CNG signal is input (S7), it is determined that the transmission is automatic transmission by the calling facsimile machine, and the CML is transmitted.
21 is switched to the modem section 7 and the operation shifts to the receiving operation (S20).

In the off-hook state, if the timer T5 times out without inputting a CNG signal (S8), a silent state between the answering machine 10 and the line 9 is detected by the transformer 23 (S9). In other words, at this time, if the normal answering operation is performed, the sending of the response message from the answering machine is finished, and the message from the calling side is being recorded.

Therefore, if there is no silent state, the facsimile returns to the standby state in order to continue the answering machine operation.

When a silent state is detected, it is determined whether or not the answering machine 10 has gone on-hook (S).
10). While the silent state continues, the on-hook monitoring is continued (S11).

That is, since the answering machine 10 normally goes on-hook when silence continues for a certain period of time during message recording, the answering machine 10
Watch for on-hook . And on hook detected
Then , since the calling facsimile apparatus may be performing manual transmission due to being on-hook due to silence, an instruction is received in S12 and thereafter.

That is, first, the CNG relay 25 is set to the off side (S12), the CML 21 is switched to the modem unit 7 side (S13), and the timer T6 is set (S1).
4). The timer T6 is different from the usual one, for example, to transmit the DIS signal twice, so that the timer T6 is set to about 8 seconds.

Before the timer T6 expires (S15), a DIS signal is sent from the modem unit 7 (S17). If the command can be received (S18), the operation shifts to the receiving operation (S19).

Further, while the command cannot be received, the timer T6
If the time is over (S15), the CML 21
Is turned off (S16), and the process returns to standby.

[0038]

According to the present invention, when a call is received from a line,
Detected off-hook of answering machine and detected silence
After detecting the on-hook state of the answering machine,
By performing data communication disconnect turn phone from the line, even if the sender is a manual transmission, the appropriate data communication
A signal transfer operation can be obtained.

[Brief description of the drawings]

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

FIG. 2 is a plan view showing an operation panel in the embodiment.

FIG. 3 is a circuit diagram showing a configuration of an NCU in the embodiment.

FIG. 4 is a flowchart showing an operation in the embodiment.

FIG. 5 is a flowchart showing an operation in the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... CPU, 2 ... ROM, 3 ... RAM, 4 ... SRAM, 5 ... Recording part, 6 ... Reading part, 7 ... Modem part, 8 ... NCU, 9 ... Telephone line, 10 ... Telephone, 11 ... Operation part, 12 ... Display, 21 ... CML, 22 ... Hook state detection circuit, 23, 24 ... Transformer, 25 ... CNG relay.

Claims (3)

(57) [Claims] 1. A data communication device to which an answering machine can be connected.
In location, off from the connection or the circuit of the answering machine on the line
Switching means and separating; before when the answering machine is connected to the line; and the hook state detecting means for detecting a hook state of the telephone answering machine
A silence state detecting means for monitoring a signal on the line and detecting a silence state of the signal on the line ;
Off-hook of the answering machine is detected and the silent
The silence state is detected by the state detection means, and then the
On-hook status of the answering machine by
State is detected, the answering machine is disconnected from the line.
Characterized by having means for remote and data communication
Data communication device . 2. The method according to claim 1, Further, if the answering machine is connected to the line,
Monitor the signal on the line and
Signal detection means for detecting the signal, After the answering machine has been activated for the incoming call,
When a signal related to the data communication is detected,
Disconnects the telephone from the line and performs data communication
Data communication device. 3. The method according to claim 1, A modem for performing data communication through the line;
A method for separating an AC signal on the line and supplying the separated signal to the modem.
Having a step, When the answering machine is connected to the line,
An AC signal on the line to the modem by the supply means;
Supply the component and detect the silence by the modem.
A data communication device, comprising: