JPH0758877A - Communications equipment - Google Patents

Abstract

PURPOSE:To attain automatic changeover by identifying reception of telephone, facsimile and data communication at the reception of a call in the equipment able to make telephone, facsimile and data communication. CONSTITUTION:The communication equipment having a function of telephone, facsimile and data communication is provided with a ringer signal detection section 6 detecting a signal of a specific frequency received from a telephone line 10 and a selection circuit selecting the telephone line 10 to a telephone set 8, a facsimile MODEM 3 and a data MODEM 4. When a CNG signal is detected from the telephone line 10, the telephone line 10 is selected to a facsimile MODEM 3, when a specific PB signal is detected, the telephone line 10 is selected to a data MODEM 4 and when either signal is not detected for a predetermined time, the telephone line 10 is selected to the telephone set 8 respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication device, and more particularly to a communication device for realizing automatic call switching of telephone, facsimile communication and data communication.

[0002]

2. Description of the Related Art In a conventional device having a function of performing telephone communication, facsimile communication and data communication, the called terminal has no means for knowing the start of data communication, and performs facsimile communication whether the calling side is a telephone. It was not possible to automatically switch the operation by detecting whether or not to perform data communication.

[0003]

In this conventional communication device, when data communication is performed, it is not possible to automatically switch to the data communication operation after an incoming call. Therefore, the operator puts the device into a state in which the device can perform the data communication operation in advance. There was a problem of having to switch. The present invention has been made to solve such a problem, and an object of the present invention is to obtain a communication device that identifies and automatically switches the reception of telephone, facsimile, and data communication when an incoming call arrives.

[0004]

The communication device of the present invention is a device having a function of performing telephone, facsimile communication and data communication, and within a fixed time after the ringer signal detecting section detects the ringer signal and the telephone line is closed. If the tone signal detected at is the CNG signal (calling tone) sent by the calling facsimile, the telephone line is switched to a facsimile modem to start facsimile communication, and after the telephone line is closed,
When the PB signal (DTMF tone) detected within a fixed time is a specific PB signal that notifies the start of data communication sent by the host device for data communication, the telephone line is switched to the data modem to start data communication. When the CNG signal and the PB signal are not detected within a fixed time, the telephone line is switched to a telephone, and the ringer signal generator controls the ringing bell of the telephone to ring.

[0005]

In the present invention, when the CNG signal sent by the facsimile device at the start of transmission or the PB signal sent by the host device for data communication at the start of data communication is detected, the telephone line is switched to the facsimile modem and the data modem, respectively. Communication is performed, and if a CNG signal and a PB signal are not detected for a certain period of time, a ringer signal is applied to the telephone.

[0006]

The present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention.
In FIG. 1, a broken line portion 10 indicates a telephone line. 1
Is a tone signal detection unit that detects a tone signal from the telephone line 10, 2 is a PB signal detection unit that detects a PB signal (DTMF tone) from the telephone line 10, and 3 is a facsimile that performs facsimile communication via the telephone line 10. Modem, 4
Is a data modem for performing data communication via the telephone line 10, 5 is a selection circuit for switching the telephone line 10, 6 is a ringer signal detecting section for detecting a ringer signal from the telephone line 10, and 7 is a ringer signal to the telephone 8. Is a ringer signal generation unit for detecting the occurrence of the occurrence of the call and the hook-off of the telephone 8.

Reference numeral 9 designates a tone signal detecting section 1, a PB signal detecting section 2, a facsimile modem 3, a data modem 4, a selecting circuit 5, a ringer signal detecting section 6 and a ringer signal generating section 7, and a tone detected after an incoming call. If the signal is a CNG signal (calling tone), a facsimile modem, if the PB signal detected after the call is a specific PB signal is a data modem, and if the tone signal and PB signal are not detected for a certain period of time, the telephone 8 is ringered. The control unit switches the telephone line 10 to the telephone 8 after applying a signal and detecting the hook-off of the telephone 8.

Next, the operation of the embodiment shown in FIG. 1 will be described. First, in the standby state, the selection circuit 5 is switched to the telephone 8. Then, the ringer signal detection unit 6 monitors the ringer signal which is an incoming signal from the telephone line 10, and notifies the control unit 9 of the detection when the ringer signal is detected. When notified of the ringer signal detection, the control unit 9 instructs the tone signal detection unit 1 to detect the tone signal and the PB signal detection unit 2 to detect the PB signal. The tone signal detector 1 monitors the tone signal from the telephone line 10 for a certain period of time, analyzes whether the detected signal is the CNG signal sent by the calling terminal of the facsimile, and if it is the CNG signal, the controller 9 To the CNG signal detection.

Next, the PB signal detecting section 2 is connected to the telephone line 10.
The PB signal is monitored for a certain period of time, and if the detected PB signal is a PB signal that notifies the start of data communication sent by the host device for data communication, the control unit 9 is notified of detection of the PB signal. Then, the controller 9 controls the tone signal detector 1
Is notified of the detection of the CNG signal, the selection circuit 5 is instructed to switch the telephone line 10 to the facsimile modem 3. When the PB signal detection unit 2 is notified of the detection of the specific PB signal, the selection circuit 5 is notified. To switch the telephone line 10 to the data modem 4.

Also, within a fixed time, a CNG signal or PB
When the signal is not detected, the control unit 9 selects the selection circuit 5
Instruct to switch the telephone line 10 to the telephone 8,
The ringer signal generator 7 is instructed to the telephone 8 to detect the generation of the ringer signal and the hook-off of the telephone 8. The selection circuit 5 switches the telephone line 10 to the facsimile modem 3, the facsimile modem 3 switches to the data modem 4, the data modem 4 switches to the telephone 8, and the telephone 8 switches to the telephone 8.
Are connected to the telephone line 10, respectively.

[0011]

As described above, according to the present invention, when the CNG signal transmitted by the facsimile device at the start of transmission or the PB signal transmitted by the host device for data communication is detected at the start of data communication, the telephone lines are respectively facsimile modems. , The data modem is switched to the communication, and the ringer signal is applied to the telephone if the CNG signal and the PB signal are not detected for a certain period of time. In this case, there is an effect that it is possible to realize a communication device that automatically switches data communication in other cases and telephone calls in other cases.

[Brief description of drawings]

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

[Explanation of symbols]

 1 Tone signal detection unit 2 PB signal detection unit 3 Facsimile modem 4 Data modem 5 Selection circuit 6 Ringer signal detection unit 7 Ringer signal generation unit 8 Telephone 9 Control unit 10 Telephone line

[Procedure amendment]

[Submission date] June 7, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction content]

[0004]

The communication device of the present invention is a device having a function of performing telephone, facsimile communication and data communication, and within a fixed time after the ringer signal detecting section detects the ringer signal and the telephone line is closed. If the tone signal detected at is the CNG signal (calling tone) sent by the calling facsimile, the telephone line is switched to a facsimile modem to start facsimile communication, and after the telephone line is closed,
When the PB signal (DTMF tone) detected within a certain time is a specific PB signal that notifies the start of data communication sent by the host device for data communication, the telephone line is switched to the data modem to start data communication, Further, when the CNG signal and the PB signal are not detected within a certain period of time, the telephone line is switched to a telephone, and a control unit that controls the ringer signal generation unit to ring the telephone call bell is provided. It also detects the ringer signal from the telephone line.
The ringer signal detector that sends a ringer signal to the telephone.
Ringer signal generation to detect live and phone hookoff
And communication signals from the telephone line other than the ringer signal are detected.
Communication signal detector and the telephone line to a telephone or other
From the selection circuit to switch to the communication terminal and the ringer signal detector
When the ringer signal detection is input, the communication signal is detected by the communication signal detector.
Signal detection, and the communication signal detection unit detects the communication signal.
Enter to select to switch the telephone line to a communication terminal.
Instruct the selected circuit to communicate from the communication signal detection unit within a fixed time
If no signal detection is input, connect the telephone line to the telephone.
Instruct the selection circuit to switch and
The signal generator generates a ringer signal and the telephone hook
And a control unit for instructing the image detection.

Claims (1)

[Claims] 1. A communication device having a function of performing telephone, facsimile communication and data communication, a tone signal detecting section for detecting a tone signal from a telephone line, and a PB signal detecting section for detecting a PB signal from the telephone line. A facsimile modem for performing facsimile communication via the telephone line, a data modem for performing data communication via the telephone line, a selection circuit for switching the telephone line, and a ringer for detecting a ringer signal from the telephone line. A signal detector, a ringer signal generator for detecting the generation of a ringer signal to the telephone and a hook-off of the telephone, the tone signal detector, the PB signal detector, a facsimile modem, a data modem, a selection circuit, a ringer signal detector. Also, the tone signal detected after control of each part of the ringer signal generation part and the incoming call is the CNG signal. No. is the facsimile modem, and the PB signal detected after the call is received is the data modem if the PB signal is a specific PB signal, and a ringer signal is applied to the telephone when the tone signal and the PB signal are not detected for a certain period of time. And a control unit for switching the telephone line to the telephone after detecting the hook-off.