JPH08125776A - Data transmitter - Google Patents

Abstract

PURPOSE: To automatically switch to a fax modem part when an opposite station is a facsimile equipment or to an automatic answering telephone system if the call of an opposite station is voice by connecting a data transmitter with the automatic answering telephone system. CONSTITUTION: When an incoming call is received from an opposite station in a state that an automatic answering telephone system is connected with a telephone connection terminal 5, a calling signal detection part 2 detects the calling signal inputted in a telephone line connection terminal 1. When the calling signal from a telephone line is continued, the automatic answering telephone system automatically responds to the signal at first, a line switch control part 8 controls a line switch circuit 9 based on the incoming current detection signal of the automatic answering telephone system detected by a current detection part 3 and connects the telephone line and a hybrid circuit 4 with built-in echo canceler, and the automatic answering telephone system normally starts to record the message from the opposite station. At this stage, when a CNG signal detection part 6 detects a CNG signal, the line switch control part 8 controls the line switch circuit 9 based on this detection signal and connects the telephone line with a fax modem part 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data transmission device,
In particular, the present invention relates to a data transmission device that automatically responds to an incoming facsimile.

[0002]

2. Description of the Related Art A call signal detecting section for detecting a call signal from a partner station on a telephone line, a current detecting section for detecting a current of a telephone line, a fax modem section for performing a modulation / demodulation operation of facsimile data, and a telephone set. In a conventional data transmission device having a telephone connection terminal for connection, when there is an incoming call from a partner station, the telephone line is monitored for a predetermined time determined by the ringing signal detection unit, and within this monitoring time If the current detection unit does not detect the current of the telephone line, the telephone line is automatically switched to the fax modem unit for connection.

[0003]

In this conventional data transmission apparatus, when the telephone answering machine is connected to the telephone connection terminal, the telephone answering machine and the data transmission apparatus automatically respond with a calling signal. , I always receive the call in the earliest automatic response.

Therefore, there is a problem that the answering machine may respond even if the partner station is a facsimile machine, or the fax modem may respond even if the partner station is a telephone. .

An object of the present invention is to connect an answering machine to a data transmission device, and automatically switch to a fax modem section when the other station is a facsimile machine and to an answering machine when the other station is voice. It is to provide a data transmission device capable of performing.

[0006]

According to the present invention, a calling signal detecting section for detecting a calling signal from a partner station on a telephone line, a current detecting section for detecting a current of the telephone line, and facsimile data In a data transmission device including a fax modem section for performing a modulation / demodulation operation and a telephone connection terminal for connecting a telephone, a hybrid circuit for converting the telephone line into four lines / 2 lines, and a facsimile from a signal received from the telephone line A CNG signal detection unit for detecting a terminal identification signal, a line switching circuit for switching and connecting a reception signal from the telephone line to the telephone connection terminal, the hybrid circuit and the fax modem unit, the ringing signal detection unit, and the current. A line switching control unit that controls the line switching circuit based on the detection results of the detection unit and the CNG signal detection unit. Data transmission device is obtained characterized by.

When an answering machine is connected to the telephone connection terminal and the CNG signal detecting section detects the facsimile terminal identification signal from the telephone line, the line switching control section connects the telephone line to the fax modem section. It is possible to obtain a data transmission device which is characterized by being switched to and connected with.

Further, the hybrid circuit may have an echo canceller built therein.

[0009]

Next, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a data transmission device of the present invention.

In this embodiment, a telephone line connecting terminal 1 for connecting a telephone line, a calling signal detecting section 2 connected to the telephone line connecting terminal 1 for detecting a calling signal from a partner station on the telephone line, and the telephone line. Current detection unit 3 for detecting the current of the device, a fax modem unit 7 for performing modulation / demodulation operation of facsimile data, a telephone connection terminal 5 for connecting a telephone, and a hybrid with an echo canceller for converting a telephone line into a 4-wire / 2-wire A circuit 4, a CNG signal detector 6 connected to the hybrid circuit 4 with a built-in echo canceller to detect a facsimile terminal identification signal (CNG signal) from a received signal from a telephone line, and a telephone line connection terminal for receiving a signal from the telephone line. 1, a line switching circuit 9 for switching connection to the hybrid circuit 4 with a built-in echo canceller and the fax modem section 7, and a call signal detection Part 2, and a line switching control unit 8 for controlling the line switching circuit 9 based on a detection result of the current detecting unit 3 and the CNG signal detection unit 6.

The terminals a, b, c and t of the line switching circuit 9 are connected to the telephone connection terminal 5, the hybrid circuit with a built-in echo canceller 4, the fax modem section 7 and the telephone line connection terminal 1, and are usually terminals. The telephone line connection terminal 1 is directly connected to the telephone connection terminal 5 through t and the terminal a.

The output side of the echo canceller built-in hybrid circuit 4 is connected to a telephone connection terminal 5. Further, the CNG signal detected by the CNG signal detection unit 6 is also given to the fax modem unit 7.

Next, the operation of this embodiment will be described.

When an incoming call is received from the other station while the telephone answering machine is connected to the telephone connection terminal 5, the call signal detection section 2 detects the call signal input to the telephone line connection terminal 1. At this point, the line is called. The switching control unit 8 does not operate.

The current detector 3 monitors the current of the telephone line in order to confirm that an answering machine has arrived.

Therefore, in this embodiment, when a ringing signal from the telephone line continues, the answering machine connected to the telephone connection terminal 5 through the terminals t and a of the line switching circuit 9 first automatically answers and then the answering machine. The current detection unit 3 detects the incoming current of the telephone, and the line switching control unit 8 controls the line switching circuit 9 based on the incoming detection signal to connect the terminal t and the terminal b. As a result, the telephone line is connected to the echo canceller built-in hybrid circuit 4.

Hybrid circuit 4 with built-in echo canceller
Performs a 2-wire / 4-wire conversion once, and returns the 4-wire to the 2-wire and connects it to the telephone connection terminal 5, so that the answering machine can suppress signal wraparound (echo) due to the hybrid coil from the partner station. Start recording the message normally.

In the meantime, when the received analog signal output from the hybrid circuit 4 with built-in echo canceller is input to the CNG signal detector 6, it is determined whether the answering telephone device responds by a facsimile signal or a voice signal. Identify by presence or absence.

When the CNG signal detection unit 6 detects the CNG signal, the CNG signal detection signal is input to the line switching control unit 8 and the line switching control unit 8 uses the CNG signal detection signal as a basis. Is controlled to connect between the terminals t and c. As a result, the telephone line is connected to the fax modem unit 7 and the reception operation of the facsimile signal is started.

[0020]

As described above, according to the present invention, the ringing signal detecting section for detecting the ringing signal from the partner station on the telephone line, the current detecting section for detecting the current of the telephone line, and the facsimile data modulation / demodulation operation. A fax modem section that
In a data transmission device including a telephone connection terminal for connecting a telephone, a hybrid circuit for converting a telephone line into four lines / 2 lines, and a CNG signal detection unit for detecting a facsimile terminal identification signal from a reception signal from the telephone line. , A line switching circuit for switching and connecting the received signal from the telephone line to the telephone connection terminal, the hybrid circuit and the fax modem section, and a line switching circuit based on the detection results of the ringing signal detection section, the current detection section and the CNG signal detection section. It is equipped with a line switching control unit to control, and an answering machine is connected to the telephone connection terminal, and when the CNG signal detection unit detects a facsimile terminal identification signal from the telephone line, the line switching control unit switches the telephone line to the fax modem unit. Connection, the answering machine automatically answers the incoming call to the data transmission device. When it automatically identifies that the other station is a facsimile machine in the data transmission device, it switches to the fax modem so that the answering machine responds even if the other station is a facsimile machine or the other station Even if the telephone is a telephone, the fax modem does not respond, and it is possible to connect the answering machine and the facsimile receiving apparatus, which are in competition with each other, to the data transmitting apparatus without any trouble.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a data transmission device of the present invention.

[Explanation of symbols]

 1 Telephone line connection terminal 2 Ringing signal detection unit 3 Current detection unit 4 Echo canceller built-in hybrid circuit 5 Telephone connection terminal 6 CNG signal detection unit 7 Fax modem unit 8 Line switching control unit 9 Line switching circuit a, b, c, t terminal

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[Procedure amendment]

[Submission date] January 31, 1996

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 1

[Correction method] Change

[Correction content]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 2

[Correction method] Change

[Correction content]

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction content]

[0004] Thus, there is a problem that other station or respond despite telephone answering device is a facsimile device, sometimes even though the fax modem counterpart station is phones can respond It was

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction content]

[0006]

According to the present invention, a telephone for connecting a calling signal detecting portion for detecting a calling signal from a partner station on a telephone line and a telephone device having an automatic answering function.
A connection terminal, a current detector for detecting an incoming electric <br/> flow to the telephone device from the telephone line, in the data transmission apparatus and a facsimile modem that performs modulation and demodulation operations of the facsimile data, and the telephone line Connection with the telephone device
And hybrid <br/> de circuit is continued to perform the 4-wire / 2-wire conversion of the telephone line, and the CNG signal detection unit for detecting a facsimile terminal identification signal from the received signal from the telephone line, the from the telephone line A line switching circuit for switching and connecting a received signal to the telephone connection terminal, the hybrid circuit and the fax modem unit, and the line switching based on the detection results of the ringing signal detection unit, the current detection unit and the CNG signal detection unit. A line switching control unit for controlling a circuit, and when the incoming call is received from the telephone line, the call signal detection is performed.
Call the above-mentioned telephone line for the specified time decided by the outlet
Connected to the device, the current detection unit
When the incoming current is detected, the line switching control unit is instructed
Therefore, the line switching circuit connects the telephone line to the hybrid line.
Data transmission device according to claim be tied switch to de circuit is obtained.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

Further, when an answering machine is connected to the telephone connection terminal and the CNG signal detecting section detects the facsimile terminal identification signal from the telephone line, the line switching control section causes the line switching circuit to operate as described above. There is obtained a data transmission device characterized in that a telephone line is switched to the fax modem section for connection.

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

In this embodiment, a telephone line connecting terminal 1 for connecting a telephone line, a calling signal detecting section 2 connected to the telephone line connecting terminal 1 for detecting a calling signal from a partner station on the telephone line, and the telephone line. Current detecting unit 3 for detecting an incoming current from the telephone , a fax modem unit 7 for performing a modulation / demodulation operation of facsimile data, a telephone connection terminal 5 for connecting a telephone device with an automatic answering function, and a telephone line of 4 lines / The echo canceller built-in hybrid circuit 4 for 2-wire conversion and the echo canceller built-in hybrid circuit 4 are connected to the facsimile terminal identification signal (C
CNG signal detection unit 6 for detecting NG signal), telephone line connection terminal 1, hybrid circuit 4 with built-in echo canceller, and fax modem unit 7 for receiving signals from the telephone line.
And a line switching control unit 8 for controlling the line switching circuit 9 based on the detection results of the ringing signal detection unit 2, the current detection unit 3 and the CNG signal detection unit 6.
It has and.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0020

[Correction method] Change

[Correction content]

[0020]

As described above, the present invention is a telephone for connecting a call signal detecting section for detecting a call signal from a partner station on a telephone line and a telephone device having an automatic answering function.
A connection terminal, a current detection unit for detecting an incoming current to the telephone equipment from the telephone line, in the data transmission apparatus and a facsimile modem that performs modulation and demodulation operations of the facsimile data, is connected between the telephone device and the telephone line A hybrid circuit that performs 4-wire / 2-wire conversion of a telephone line, a CNG signal detection unit that detects a facsimile terminal identification signal from a received signal from the telephone line, a telephone connection terminal, a hybrid circuit, and a fax that receive the signal received from the telephone line. comprising a line switching circuit which connects the switching to the modem unit, call signal detecting unit, and a line switch control unit for controlling the line switching circuit based on the detection result of the current detecting unit and the CNG signal detection unit, the telephone times
When there is an incoming call from the line, the place determined by the ringing signal detector
Connect the telephone line to the telephone device for a fixed time, and
Line switching control when the current detector detects incoming current
The line switching circuit hybridizes the telephone line according to the instructions of the control department.
When the CNG signal detection unit detects a facsimile terminal identification signal from the telephone line by connecting the telephone answering machine to the telephone connection terminal by switching to the connection circuit, the line switching circuit is instructed by the instruction of the line switching control unit. By switching the telephone line to the fax modem section and connecting,
When the answering machine automatically responds to an incoming call to the data transmission equipment, and when the data transmission equipment automatically identifies that the other station is a facsimile machine, it switches to the fax modem section. The answering machine responds even though it is a device,
Fax modem even though the other station is a telephone
It is possible to connect the answering machine and the facsimile receiving apparatus, which are in conflict with each other, to the data transmitting apparatus without any trouble because the section does not respond.

Claims (3)

[Claims] 1. A calling signal detecting section for detecting a calling signal from a partner station on a telephone line, a current detecting section for detecting a current of the telephone line, a fax modem section for performing a modulation / demodulation operation of facsimile data, and a telephone. In a data transmission device having a telephone connection terminal for connecting a telephone line, a hybrid circuit for converting the telephone line into four lines / 2 lines, and a CNG signal detection unit for detecting a facsimile terminal identification signal from a received signal from the telephone line. A line switching circuit for switching and connecting a received signal from the telephone line to the telephone connection terminal, the hybrid circuit and the fax modem unit, the ringing signal detection unit, the current detection unit and the C
A line switching control unit that controls the line switching circuit based on a detection result of an NG signal detection unit. 2. An answering machine is connected to the telephone connection terminal, and when the CNG signal detection unit detects the facsimile terminal identification signal from the telephone line, the line switching control unit connects the telephone line to the fax modem unit. The data transmission device according to claim 1, wherein the data transmission device is switched to and connected. 3. The data transmission device according to claim 1, wherein the hybrid circuit incorporates an echo canceller.