JPH09107415A - Data communication equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To connect a slave telephone set to a destination called from the slave telephone set after the end of communication of the main body by informing the end of data communication of the main body to the slave telephone set and allowing the communication equipment to receive a call from the slave telephone set even when the data communication equipment is busy. SOLUTION: The data communication equipment connected to a slave telephone set is provided with an off-hook detection section 2 of a slave telephone set 1, a pseudo CI generating section 4 to call the slave telephone set 1, a selection section 3 to select a voltage applied to the slave telephone set 1 from a line or the pseudo CI generating section 4, and dial detection sections 2, 5 by a call of the slave telephone set 1 to detect off-hook and dialing of the slave telephone set 1 during communication and to make dialing from the slave telephone set 1 after the end of communication.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data communication device such as a facsimile device to which a slave telephone can be connected.

[0002]

2. Description of the Related Art Conventionally, a facsimile apparatus has been known as a data communication apparatus which has a connecting portion for a slave telephone and can connect the slave telephone to this connecting portion.

In this data communication device, a telephone / facsimile device automatically detects a calling tone signal (CNG signal) indicating that the device is a facsimile device when receiving a call and automatically switches between a facsimile reception mode and a call mode. Some have an automatic switching function.

[0004]

However, in the above-mentioned conventional example, when the data communication device is communicating, whether the data communication device is communicating when the user tries to make a call from the slave telephone side. However, if the data communication device is in communication, it cannot be accepted even if a call is made, which makes it difficult to use.

According to the present invention, the sub-telephone side can be notified that the data communication of the main body is completed, and even if the data communication device is in use, the call from the sub-phone side is accepted and after the communication of the main body is completed. An object of the present invention is to provide a data communication device capable of connecting a child phone to a destination called from the child phone side.

[0006]

According to the present invention, in a data communication apparatus capable of connecting a slave telephone, an off-hook detecting means for detecting that the slave telephone is off-hook and a slave telephone call signal for calling the slave telephone are provided. Pseudo CI generating means for generating the pseudo CI, selecting means for selecting whether the voltage applied to the slave telephone is obtained from the line or the pseudo CI generating means, and dial detection for detecting a dial signal issued by the slave telephone. Means, the pseudo CI generating circuit, the selecting means, and a control means for controlling the data communication of the main body, wherein the control means switches the line to the data communication side, and then the slave telephone is off-hook. It is detected that the dial signal from the sub-telephone is detected, and the sub-phone call signal is sent to the sub-telephone side according to the result of the decision, Characterized by sending a dial signal to the line. In the present invention, communication on the data communication device side is generally referred to as data communication,
For example, image communication in facsimile is included.

[0007]

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

Although not shown in FIG. 1, a reading unit for reading a document, a recording unit for recording an image, an operation unit for performing an operation, etc. are provided.

In FIG. 1, a slave telephone 1 is connected to the data communication device of this embodiment. Current sensor 2
Is for detecting the input current to the sub-telephone 1 (due to turning on / off the current flowing to the sub-telephone 1 side, dial pulse from the sub-telephone 1 and on-hook / off-hook of the sub-telephone 1 are detected.
Off-hook can be detected).

The H relay 3 provides a voltage required for the slave telephone 1 to operate. Pseudo CI generation circuit 4
Is a circuit for generating a pseudo CI for calling the slave telephone 1. The DTMF detection circuit 5 detects a DTMF signal.

The CPU 6 is a microcomputer, RO
It is composed of M, RAM, etc., and controls the entire apparatus. The CI detection circuit 7 uses a call signal (CI).
Is to be detected.

The modem 8 modulates / demodulates a transmission / reception signal. The CML relay 9 switches the line between the slave telephone 1 side and the facsimile side. The switching means 10 selects whether the output signal of the current sensor 2 is the reception signal or the signal from the line side is the reception signal.

2 and 3 are flow charts showing a control operation in the present embodiment when a call is made from the slave telephone 1 while receiving data.

First, the CI signal from the line L1-L2 is
When an incoming call is detected by the CI detection circuit 7 (S
1), the CML relay 9 is switched to the A'-B 'side,
The H relay 3 is switched to the A'-B 'side (S2).

When CNG is detected by the modem 8 (S3), normal communication operation is started (S9). Then, during the communication operation of the main body, a signal from the current sensor 2 is detected to determine whether the slave telephone 1 is off-hook (S1).
0).

When the slave telephone 1 is off-hook during communication, an off-hook flag (hereinafter referred to as an OH flag).
Is set to "1" (S11), and the dial from the slave telephone 1 is detected (S12). When the dial from the slave telephone 1 is detected, the dial is stored (S14) and the dial flag is set to "1" (S15).

After the dial is detected, the off-hook of the sub-telephone 1 is detected (S16). If the sub-telephone 1 is off-hook, it is considered that the dial is continued. Therefore, the dial detection is continued. To do. If the slave telephone 1 is on-hook, it is considered that the dialing is completed.

Next, it is judged whether the communication is completed (S1
7) If it continues, the off-hook of the slave 1 is determined (S10).

When the communication operation is completed, it is determined whether the slave telephone 1 is off-hook during communication. H. Judgment is made by the flag (S18). If the slave telephone 1 is off-hook (OH flag = “1”), it is determined whether the dial telephone is dialed from the slave telephone 1 (S19).

If the child telephone 1 is dialing during communication (dial flag = "1"), the stored dial is called from the main body (S25). Then, the sub-phone call C is started to the sub-phone 1 (S2).
6).

In response to the sub-phone call C, it is determined whether the sub-phone 1 is off-hook (S27). If the sub-phone 1 is off-hook, the sub-phone call C is stopped (S28). It is judged whether or not the calling operation from the main body is completed (S29), and if the calling is completed, the CML relay 9 is switched to the AB side and the H relay 3 is switched to the AB side (S30). After that, O.
H. The flag is set to "0" (S31), and the process returns to the standby.

Further, in the present embodiment, the control operation in the case where the slave telephone 1 is simply taken off-hook during data reception is also shown in the flowcharts of FIGS.

That is, when the user off-hooks the sub-phone 1 during communication of the main body but does not dial, the CPU 6 thinks that "the user wants to use the sub-phone 1". In this case, the operation is the same as that described above until the dial from the slave telephone 1 is detected (S12).

That is, since the dial is not detected,
The dial flag is set to "0" (S13), and the off-hook of the slave telephone 1 is detected (S16). Then, if the child phone 1 is on-hook, the user
It is thought that he just went off-hook.

In this case, when the dial flag is detected after the communication is completed (S19), since the dial flag is "0", the child telephone call B is started (S20) and the child telephone call B is answered in response to the child telephone call B. It is determined whether the telephone 1 is off-hook (S21).

When the off-hook is made, the child telephone call B is stopped (S22), the CML relay 9 is switched to the AB side, and the H relay 3 is switched to the AB side (S2).
3). After that, O. H. Set the flag to "0" (S2
4) Return to standby.

In the present embodiment, the control operation for calling the slave telephone 1 when the incoming call is a telephone is also shown in the flowcharts of FIGS.

That is, if the incoming call is a telephone call, CN
Until the detection of G (S3), the operation is the same as the above flowchart.

Here, since CNG is not detected, the sub-phone call A is started (S5) and the off-hook of the sub-phone 1 is detected (S6). If the off-hook of the sub-phone 1 is detected (S6), the sub-phone call A is stopped (S7), and the CML is set.
The relay 9 is switched to the AB side, and the H relay is switched to the AB side (S8). Then return to standby.

As described above, the off-hook detecting means 2 for detecting that the slave telephone 1 is off-hook, the pseudo CI generating means 4 for generating the pseudo CI as a calling signal for calling the slave telephone, and the slave telephone. The applied voltage is
There is provided a selecting means 3 for selecting whether it is from a line or from the pseudo CI generating means, and dial detecting means (2 and 5) for detecting a dial signal originated by the slave telephone, so that communication is being performed. By detecting the off-hook of the slave telephone and the dial call, it is possible to issue the dial from the slave telephone 1 after the communication is completed. Calls from 1 can be made.

FIG. 4 is an explanatory diagram showing a specific example of the child telephone call signal.

A ringing signal A when an incoming call is received, and a ringing signal B when an off-hook of a slave telephone is detected during communication,
The time or pattern (T1 to T
8), by changing the frequency (f1 to f3), etc.
This allows the user to easily distinguish the meaning of the child telephone call signal.

In the above embodiment, the case of the receiving operation has been described, but the same can be applied to other cases such as the transmitting operation and copying.

Further, in the above-mentioned embodiment, the current sensor 2 (during dial pulse) and the DTM are used as dial detecting means.
Although the F detection circuit 5 (at the time of DTMF) is used, it is also possible to use one integrated into one IC or the like.

Further, in the above embodiment, when the dial from the slave telephone 1 is a DTMF signal, the DTMF detection circuit 5
However, if the DTMF detection function of the modem 8 can be used at the time of communication, the DTMF detection circuit 5 can be deleted using the function of the modem 8.

Further, although the above embodiment has been described by taking the facsimile machine as an example, the present invention can be widely applied to other data communication apparatuses to which a slave telephone can be connected.

[0037]

As described above, according to the present invention,
Even when the data communication device is communicating, it can accept the call from the slave phone and notify the user of the slave phone of the end of the communication of the main body. There is an effect that a child phone can be connected to the called party and the man-machine interface of the data communication device can be improved.

[Brief description of the drawings]

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

FIG. 2 is a flowchart showing the operation of the embodiment.

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

FIG. 4 is an explanatory diagram showing a specific example of a child telephone call signal of the above embodiment.

[Explanation of symbols]

 1 ... Slave telephone, 2 ... Current sensor, 3 ... H relay, 4 ... Pseudo CI generation circuit, 5 ... DTMF detection circuit, 6 ... CPU, 7 ... CI detection circuit, 8 ... Modem, 9 ... CML relay, 10 ... Switching means.

Claims (3)

[Claims] 1. In a data communication device to which a slave telephone can be connected, an off-hook detecting means for detecting that the slave telephone is off-hook, and a pseudo CI generation for generating a pseudo CI as a calling signal for calling the slave telephone. Means, selecting means for selecting whether to use the voltage from the line or the voltage from the pseudo CI generating means as the voltage to be applied to the slave telephone, and the dial detecting means for detecting the dial signal issued by the slave telephone. When the off-hook of the sub-phone is detected after switching the line to the data communication device side, the dial signal from the sub-phone is judged and the call signal is sent to the sub-phone side according to the judgment result and the line A data communication device having a control means for transmitting a dial signal to the data communication device. 2. The control means according to claim 1, wherein the control means detects that the slave telephone is off-hook after switching the line to the data communication device side and determines a dial signal from the slave telephone. When the telephone makes a dial call, after the communication of the main unit is completed, the sub-phone call signal is sent to the sub-phone side, and the main unit also sends a dial signal to the line to connect the line to the sub-phone. If the sub-phone is only off-hook, it has means for sending a sub-phone call signal to the sub-phone to notify the user if the line is available after the end of communication of the main unit. Characteristic data communication device. 3. The calling signal A according to claim 2, and the calling signal B when an off-hook of a slave telephone is detected during communication.
And a call signal C when a dial call from a child phone is detected during communication, which is a child phone call signal that can be distinguished by the user.