JPH02203661A - Data communication equipment - Google Patents

Abstract

PURPOSE:To control data communication without disturbing talking by an externally mounted telephone set by controlling the communication based on the result of detection by a means detecting a voice talking signal through a communication line. CONSTITUTION:A data communication equipment 1 using a communication line in common with an externally mounted telephone set 12 is provided with a voice confirming means g detecting a voice talking signal through a communication line LI and the communication is controlled based on the result of detection by the voice confirming means 9. That is, the voice confirming means 9 is provided with a DC-cut capacitor 21, a high impedance transformer 22 and a level detector 23 or the line and connected between a connector 2 and a switch 4 to detect a voice signal on a premises line LI. The voice speech signal is detected to control the communication then the communication of the data communication equipment 1 is controlled without disturbing the talking by the externally mounted telephone set 12 and the line in common use with the externally mounted telephone set 12 is used effectively and properly.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a data communication device, and particularly to a data communication device that shares one communication line with an external telephone.

(Prior Art) Recently, in the information society, data communication devices such as facsimile machines and personal computers with communication functions have become widespread.

However, when installing these data communication devices, the data communication device and external telephone are connected in parallel to the existing telephone line, like a parent-child phone, without installing a new dedicated line. It is common to use them in common. In this case, the telephone is placed on a desk separate from the data communications device, and the data communications device and telephone are used independently.

(Problem to be Solved by the Invention) However, in such conventional data communication devices, the telephone and the data communication device are simply connected to one line in parallel, just like a parent-child telephone. As a result, there has been competition between the telephone and the data communication device to use the line, resulting in various inconveniences.

For example, if a facsimile device is connected as a data communication device, if a transmission is started from the facsimile device while the telephone is in use, the line on the telephone side may be disconnected, or the person communicating with the facsimile device may interfere with the telephone side. or In other words, facsimile machines are manufactured with the assumption that they will not be connected to a line in parallel with other devices, and if the facsimile machine is in dial pulse mode, the telephone line will be disconnected even if the telephone is busy. ,
Further, if the facsimile device is in the DTMF mode, the DTMF sound or calling tone of the facsimile communication will interfere with the telephone side, interfering with the telephone call.

(Purpose of the Invention) Therefore, the present invention detects a voice call signal on a line shared with an external telephone and controls communication, thereby controlling communication of a data communication device without interfering with calls by the external telephone. The purpose is to make effective and appropriate use of lines shared with external telephones.

(Structure of the Invention) In order to achieve the above object, the present invention provides a data communication device that shares a communication line with an external telephone, and includes a voice confirmation means for detecting a voice call signal on the communication line. It is characterized in that communication is controlled based on the detection result of the means.

Hereinafter, the present invention will be specifically explained based on examples.

1 to 4 are diagrams showing an embodiment of the present invention, which is applied to a facsimile machine.

FIG. 1 shows a facsimile device 1 as a data communication device.
, the facsimile device 1 includes connectors 2 and 3, a switch 4, a relay 5, a line protection device 6, a modem 7, a system control section 8, a voice confirmation device 9, a facsimile unit section 10, and a call detection section 11. and a telephone 12, etc.

A local line LT is connected to the connector 2, and the local line LI is connected to a switching device 4 and a voice confirmation device 9 via the connector 2. The switching device 4 operates under the control of the system control section 8 and selectively connects the private line LI to the telephone 12 side or the facsimile machine 1 main body side (relay 5 side). The relay 5 operates under the control of the system control unit 8, and connects and disconnects lines and sends out dial pulses. The line protection device 6 separates the local line Ll from the facsimile machine 1 to protect it in the event of an abnormality, and the modem 7 modulates and demodulates transmitted and received signals.

The system control unit 8 is a ROM (R
Ead 0nly Memory) and RAM (Randon+ Access
The facsimile machine 1 controls each part of the facsimile machine 1 according to the program in the ROM to execute the sequence of the facsimile machine 1, and also executes the communication control process of the present invention.

The audio confirmation device 9 includes a DC cut capacitor 21 and a high impedance (20Ω to 50Ω) transformer 22.
and a level detector 23, etc., which are connected between the connector 2 and the switch 4 to detect the audio signal on the local line Ll. That is, the level detector 23 includes a low pass filter, a bypass filter, and an A/D filter.
It is equipped with a converter, and as shown in Figure 2, the frequency 30
Level of audio band from 0Hz to 2400Hz OdBm~-
An analog signal of about 40 dBm is detected and the detection result is output to the system control unit 8 as a binary signal.

The facsimile unit section 10 includes a communication control section, an encoding/
This is a general term for facsimile units such as decoding units.

The call detection unit 11 is connected between the switching device 4 and the connector 3, detects a call signal from the local line Ll, and outputs the detection result to the system control unit 8 as a binary signal.

As shown in FIG. 3, the facsimile machine 1 is connected to a private branch exchange 31 via a private branch line Ll, and the private branch exchange 31 is connected to a public telephone line. An external telephone 32 is connected in parallel to a private branch line Ll that connects the private branch exchange 31 and the facsimile device 1, and the facsimile device L and the external telephone 32 are connected in parallel to one private branch line 11. It becomes.

Next, the effect will be explained.

The present invention is directed to a facsimile machine 1 connected to an external telephone 32 in parallel to one line, which detects the voice of a call made by the external telephone 32 and performs communication processing without interfering with the call on the external telephone 1320. It has characteristics. This communication process will be explained below.

First, the processing at the time of transmission will be explained based on the flowchart shown in FIG.

In the initial state of the facsimile machine 1, the switching device 4 connects the private line LI to the telephone 12 side, and in this state, the operator sets a document on the document table of the facsimile machine l, enters the recipient's telephone number, etc. After inputting and performing a transmission operation, the facsimile machine 1 detects a dial request (step S1). When the facsimile machine 1 detects a dialing request, the facsimile machine 1 checks whether or not a voice detection signal is manually inputted from the voice confirmation bag W9, that is, whether the external telephone 32
If the call is in progress, the call process is not performed and the flow ends.

In step Sz, when the voice detection signal is not input from the voice confirmation device 9, that is, when a call is not being made using the external telephone 32, the switch 4 is switched to the main body side of the facsimile machine 1 (the side of the relay 5). , relay 5
is turned on and a dial signal is sent (step S3.
S4). Thereafter, normal facsimile communication processing is performed with the other party's facsimile machine (step S).

Therefore, it is possible to prevent the facsimile machine 1 from processing a call while the external telephone 32 is in use, thereby preventing the external telephone 32 from interfering with the call or disconnecting the line.

Next, the processing at the time of reception will be explained based on the flowchart shown in FIG.

In the initial state where the switching device 4 connects the private line Ll to the telephone 12 side, when a ring signal is sent from the private line Ll, the ring detector 11 detects this ring signal and sends it to the system controller 8. Output. When the system control unit 8 receives a detection signal indicating that a call signal has been detected from the call detection unit 11 (step P,), it activates an internal timer (step pz) and measures a preset predetermined time t. (Step P3). In other words, the local line L
When a call signal is sent from the external telephone 3,
2 is also ringing, and is waiting for the operator to take the external telephone 32 off-hook within the predetermined time in response to the ringing of the bell.

After a predetermined period of time has elapsed, the system control unit 8 detects the call detection unit 1.
Step P4) checks whether the detection signal of the ringing signal is continuously inputted from step 1. If no ringing signal is detected, the external telephone 32 is off-hook.
Alternatively, it is determined that the other party has gone on-hook, and this flow ends. When a ringing signal is continuously detected, it is determined that the external telephone 32 is not to be used, the switch 4 is connected to the main body of the facsimile machine 1, and the relay 5 is turned on to perform normal facsimile reception processing (step P.S.
, P6).

Therefore, if there is a call from the private line Ll,
The facsimile machine 1 can perform reception processing without interfering with responses by the external telephone 32.

In the above embodiment, a case has been described in which the facsimile device 1 and the external telephone 32 are connected to the private line Ll, but the invention is not limited to this. attached telephone 32
may be connected in parallel.

(Effects) According to the present invention, communication of a data communication device can be controlled without interfering with calls by an external telephone, and a line shared with the external telephone can be used effectively and appropriately.

[Brief explanation of the drawing]

1 to 5 are diagrams showing one embodiment of the data communication device of the present invention, FIG. 1 is a block diagram of a facsimile machine to which the data communication device is applied, and FIG. 2 is a detection level detector of the same. 3 is a system diagram showing the connection relationship between the facsimile machine and the telephone, FIG. 4 is a flowchart showing the communication processing at the time of transmission, and FIG. 5 is the communication processing at the time of reception. FIG. l...Facsimile device (data communication device),
4... Switching device, 5... Relay 6... Line protection device, 7... Modem, 8... System control unit, 9 ...Audio confirmation device (voice confirmation means) 10...
...Facsimile unit section, 11 ... Call detection section, 12 ... Telephone, 21 ... Capacitor, 22 ... Transformer, 23 ... ...Level detector 31...Private branch exchange, 32...External telephone, Ll...Private line, L...Public line. Substitute Patent Attorney Ariga Army Frequency f () Iz) Figure Figure

Claims (1)

[Claims] A data communication device that shares a communication line with an external telephone, characterized in that a voice confirmation means for detecting a voice call signal on the communication line is provided, and communication is controlled based on the detection result of the voice confirmation means. Communication device.