JPH07183966A - Communication terminal equipment - Google Patents

Abstract

PURPOSE:To accurately automatically switch a modem, facsimile equipment and telephone set which are connected to a telephone line in accordance with the communication contents at the time of an incoming call. CONSTITUTION:A modem 10, a facsimile equipment 20 and a telephone set 30 are cascade-connected to a telephone line. The data processor being the host devices 40 of the modem 10 is connected to the facsimile equipment with a communication interface 50. The facsimile equipment 20 is provided with an incoming terminal discrimination means 211 discriminating which incoming of data is calling, the modem, the facsimile equipment, or the telephone set, and a means 212 notifying the discrimination output of the incoming terminal discrimination means to a data processor. The facsimile equipment performs the line connection control for facsimile communication at the time of facsimile incoming and performs the line connection control for speech at the time of speech. At the time of data communication, the effect is notified to the host device. The host device performs the line connection control for the data communication by the modem.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication terminal device in which a facsimile device, a modem and a telephone are cascade-connected to one telephone line and each communication is shared by one line. Selection and control of its automatic switching.

[0002]

2. Description of the Related Art With the demand for communication using a facsimile or a modem, a modem, a facsimile device and a telephone are combined and connected to one telephone line to perform data communication, facsimile communication and telephone call on the same telephone line. It has become possible to configure communication terminal devices that enable the above.

Among these, a composite terminal device in which a modem and a telephone are combined and a composite terminal device in which a facsimile device and a telephone are combined can perform not only a manual reception mode but also an automatic reception mode.

In the manual reception mode, the facsimile device or the modem does not accept an incoming call when an incoming call is received, and the telephone line is connected to the telephone by first calling the telephone and the operator off-hooking the telephone. And at this time,
If the incoming call is to the telephone, the call is made as it is. If the incoming call is to the facsimile machine or modem, the operator switches the telephone line to the facsimile machine or the modem side to perform facsimile reception or data communication. .

However, in this manual reception mode, when the operator is absent, the telephone line to the facsimile device or the modem is not switched, so that it is not possible to accept the facsimile incoming call or the data incoming call.

Therefore, the automatic reception mode is used,
There are two automatic reception modes in the case of a composite terminal device including a telephone and a facsimile device, a facsimile priority mode and a telephone priority mode.

In the facsimile priority mode, when an incoming call arrives, the telephone line is first connected to a facsimile apparatus, and C is used for facsimile communication within a preset time.
When the NG signal (calling tone signal) is detected, the facsimile communication is started. When the CNG signal is not detected within the predetermined time, a call signal is sent to the telephone and the operator is called before the telephone line is switched to the telephone for connection. It is a thing.

In the telephone priority mode, when an incoming call arrives,
If the telephone is given priority to receive the call for a certain period of time and the operator does not respond such as going off-hook during the certain period of time (for example, the bell rings within a predetermined number of times), the facsimile machine is automatically connected to the telephone line. The connection is made to start the facsimile communication.

On the other hand, in the case of a composite terminal device consisting of a modem and a telephone, the telephone is given priority to the incoming call for a certain period of time.
If there is no response from the operator such as going off-hook during this fixed time, there is only a telephone priority mode that automatically connects the modem to the telephone line to start data communication. This is because the modem does not have a ringing signal sending function for making the telephone ring the bell, and the operator cannot call it once it is connected to the telephone line.

The above is a composite terminal device including a telephone and a facsimile device or a telephone and a modem.
In Japanese Patent Laid-Open No. 61460/1994, in the case of a compound terminal device including a modem and a facsimile device, a device that automatically switches when a call arrives is proposed. FIG. 6 is a block diagram of a main part of the composite terminal device described in this publication.

In FIG. 6, L is a telephone line, and the modem 2 and the facsimile machine 3 are connected via the switching circuit 1.
Connected to the telephone line L. Then, the switching circuit 1
Normally, it is switched to the facsimile machine 3 side.
At the connection point between the switching circuit 1 and the facsimile device 3,
The automatic switching control circuit 4 is connected.

In the device of FIG. 6, when an incoming call is received,
The automatic switching control circuit 4 determines whether or not a CNG signal peculiar to a facsimile incoming call is detected within a preset predetermined time. When the CNG signal is detected, the switching circuit 4 is left as it is and the facsimile communication is started. However, when the CNG signal is not detected within the predetermined time, the automatic switching circuit 4 causes the switching circuit 1 to move to the modem 2 side. To switch to.

[0013]

By the way, each of the above-mentioned compound communication terminal devices is a combination of two kinds of a telephone, a facsimile machine and a modem.
A communication terminal device combining these three is also conceivable.

For example, FIG. 7 shows an example of the configuration of this type of communication terminal device. In the figure, L is a telephone line, and a modem 5, a facsimile device 6, and a telephone 7 are cascade-connected to this telephone line L. The modem 5 is connected to the host device 8 which is a data communication device. In FIG. 7, the modem 5, the facsimile device 6, and the telephone 7 are cascade-connected in this order, but the same applies when the facsimile device, the modem, and the telephone are cascade-connected in this order.

In the communication terminal device in which these three types are combined, the following is performed in the manual reception mode when an incoming call is made,
You can switch between telephone calls, facsimile communications, and data communications.

That is, when there is an incoming call from the telephone line L, the facsimile device 6 and the modem 5 do not respond to this,
The telephone 7 generates a ringing tone and waits for the operator's response. The operator who responds discusses whether the communication is facsimile communication or data communication, and then operates the facsimile device 6 or the modem 5 to activate the communication.

However, in the case of the communication terminal device in which the three types of terminals of the facsimile device, the modem and the telephone shown in FIG. 7 are combined, the automatic reception mode has not been able to function well in the past. For example, as mentioned above,
By applying the automatic reception mode in the case of a combination of two types of a facsimile machine and a telephone and a modem and a telephone, it is possible to make a priority call to the telephone and switch to the facsimile machine or the modem depending on the number of times the bell rings. It is conceivable that if the modem 5 is connected to the telephone line L before the facsimile device 6 with respect to the number of times the bell rings, as described above, the modem does not have the function of switching the telephone line to another terminal. Therefore, even if the incoming call is a facsimile incoming call, the incoming call to the facsimile device 6 is no longer possible.

Therefore, it is conceivable to apply the automatic switching method shown in FIG. 6 in the case of the compound terminal device of the modem and the facsimile device. However, the device of FIG. 6 relates to switching control when the telephone line is limited to the case where the telephone line is shared by the facsimile device and the modem, and is not compatible with a device that shares even telephone calls. When a telephone is connected to the device 3, even if the incoming call is a call, the call cannot be performed after the automatic switch control circuit 4 switches the call to the modem 2 side because it is not a facsimile call. The same applies when a telephone is connected to the modem 2.

Further, a normal facsimile machine or modem performs line connection and communication start by detecting a calling signal. In the case of the configuration of FIG. 6, the automatic switching control circuit 4 is used.
When it is determined that the incoming call is data to the modem 2,
Since the telephone line L is already connected to the modem 2 by the switching circuit 1, there is no ringing signal for the modem 2,
I cannot find the timing to start data communication.

Therefore, as shown in FIG. 7, in the composite terminal device in which the modem, the facsimile device and the telephone are combined,
Conventionally, it can be used only in the manual reception mode, and the presence of an operator is indispensable.

Further, in the composite terminal device of FIG. 6, the modem 2
There is also a drawback that the telephone line L cannot be switched to the modem 2 side when making a call from.

Further, the compound terminal device of FIG. 6 automates the terminal switching when an incoming call is received, and once the facsimile communication or the data communication is started, the telephone line can be handed over to another communication terminal after the end. There wasn't. However, if facsimile communication, data communication, and telephone call can be freely switched by making and receiving one call, a new application using these three parties' communication can be considered.

The present invention solves the above problems and uses the same telephone line as a modem, a facsimile machine and a telephone.
A first object of the present invention is to enable a called terminal to be automatically switched depending on the contents of communication in a composite terminal device shared by persons.

In addition, during one call, data communication,
A second object is to provide a call terminal device capable of freely switching between facsimile communication and call.

[0025]

In order to solve the above problems, according to the present invention, a modem (which is connected to a data processing device (40) corresponds to the reference numeral of the embodiment of FIG. 1 described later. 10), the facsimile device (20) connected to the data processing device (40) via the communication interface (50), and the telephone set (30) are cascade-connected to one telephone line L to form a facsimile. The device (20) performs the first connection control between the device (20) and the telephone line (L) and the second connection control between the telephone (30) and the telephone line L, and the data processing device (40) A communication terminal device for performing a third connection control between the modem (10) and the telephone line L, wherein one of the facsimile device (20) and the modem (10) receives an incoming data, Fak Incoming call to a millimeter unit, the called terminal identification unit that determines which one of the incoming call to the telephone set (2
11) and means (212) for notifying the data processing device (40) of the identification output of the receiving terminal identification means,
The facsimile device (20) performs the first and second connection control based on the identification output of the receiving terminal identification means, and the data processing device (40) based on the identification output of the receiving terminal identification means. And a communication terminal device configured to perform the third connection control.

After the data communication by the modem (10) to the data processing device (40), the facsimile device (20) is started via the communication interface (50) while maintaining the line connection state. Then, the first activating means (4
1) is provided, and the facsimile device (20) is provided with
Second activating means (213) for activating the data processing device (40) through the communication interface (50) to enter the data communication mode after the end of the facsimile communication or the call, while maintaining the line connection state. Is also provided.

[0027]

In the present invention having the above-mentioned structure, it is determined whether the incoming call is a data communication, a facsimile communication, or a call by the receiving terminal identifying means provided on one of the facsimile device and the modem. Then, for example, when the receiving terminal identifying means is provided in the facsimile device, the identification output signal is sent to the data processing device via the communication interface. When the receiving terminal identifying means is provided in the modem, the identification output signal is sent to the data processing device, and the data processing device transfers the identification output signal to the facsimile device via the communication interface.

When the incoming call is a data communication, the data processing device controls the line connection to the modem and activates the data communication by the above incoming call identification output signal. On the other hand, in the facsimile machine, if the incoming call is a facsimile incoming call,
Perform the first connection control to connect your device to the telephone line,
Performs facsimile communication processing. Further, if the call is an incoming call, the facsimile apparatus performs the second connection control for connecting the telephone to the telephone line L. As described above, automatic switching of the facsimile device, the modem, and the telephone at the time of incoming call is realized.

Further, by performing the second connection control in the facsimile apparatus after the facsimile communication, it is possible to make a telephone call subsequent to the facsimile communication. Further, after the data communication, it is possible to activate the facsimile communication from the data processing device to the facsimile device through the communication interface or to give a call instruction to the telephone. Therefore, it is possible to switch over between facsimile communication, data communication, and telephone communication as many times as desired by one incoming call.

Further, since the modem, the facsimile machine and the telephone are cascade-connected, the transmission from the modem is
It will be done without any problems.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a communication terminal device according to the present invention will be described below with reference to FIGS. FIG. 1 is a block diagram showing the configuration of the first embodiment of the present invention.

In FIG. 1, 10 is a modem, 20 is a facsimile machine, 30 is a telephone, and these are telephone lines L.
Are connected in cascade (cascade connection). The order of connection to the telephone line L is not limited to the example shown in the figure. For example, the facsimile device 20, the modem 10,
You may cascade-connect in order of the telephone 30. Modem 1
0 is connected to a host device 40 as a data processing device that processes data from the modem 10.

A communication interface 50 is connected between the facsimile device 20 and the host device 40 for the modem 10. In this case, this host device 4
Some personal computers and workstations forming 0 have a plurality of communication interfaces, and thus the communication interfaces can be used as the communication interface 50. An RS-232C interface, for example, is used as the communication interface 50.

As shown in the figure, the modem 10 includes a data communication control unit 11, a ringing signal (ringer) detection unit 12, and a changeover switch SW1 for switching line connection for data communication in the modem 10. In this example, the line connection terminal 10L is connected to the telephone line L, and the telephone terminal connection terminal 10T is connected to the line connection terminal 20L of the facsimile device 20.

The ringing signal detector 12 detects a ringer sent at the time of an incoming call via the telephone line L and notifies the data communication controller 11 of the detection.

The data communication control unit 11 includes a host device 40.
Receiving a control signal from the switch SW1,
Performs line connection control. When performing data communication with the other party via the telephone line L, the switch SW1 is switched to the a1 side. In addition, when the facsimile device 20 or the telephone 30 performs a facsimile communication or a telephone call,
The switch SW1 is switched to the b1 side. In a steady state such as an incoming call waiting state, the switch SW1 is switched to the b1 side.

As will be described later, the host device 40 receives the data communication incoming notification from the facsimile device and controls the data communication control section 11 to control the line connection of the modem 10. Further, in this example, in order to enable facsimile communication and telephone call by the telephone 30 after data communication by the modem 10, the host device 40 is provided with an activating means 41 for telephone call and facsimile communication.

The software of the host device 40 controls the data communication control unit 11 in response to the incoming notification of the data communication from the facsimile device, and changes it so as to control the line connection, and the function of the activation means 41. Except that the modem 10 and the host device 40 for the modem are provided.
Can use a commercially available device as it is. At this time, if the modem 10 is set in the automatic reception mode, the data communication control unit 11 causes the calling signal detection unit 12 to ring the ringer more than a predetermined number of times when the ringing signal detection unit 12 receives the incoming call. When the telephone 30 does not receive this incoming call, the switch SW1 is switched to the a side, and the modem 1
Since 0 is connected to the telephone line L, the modem 10 is used in the manual mode in this example.

The facsimile device 20 and the system control unit 21 are provided with a changeover switch circuit S for performing line connection switching for facsimile communication and telephone communication.
W2 and SW3, ringing signal detector 22, telephone 30
Off-hook detecting section 23 for detecting the off-hook of the same and a facsimile communication control section 24 for detecting the facsimile communication.
And a call detection section 25 provided in parallel with the facsimile communication control section 24, and a call signal generation section 26 for supplying a call signal to the telephone 30. Then, the telephone 30 is connected to the telephone terminal connection terminal 20T of the facsimile device 20.

The system control section 21 includes a switch circuit SW.
2 and SW3 are switched to control the line connection whether to perform the facsimile communication or the telephone 30. In the steady state, the switch SW2 is switched to the b2 side and the switch SW3 is switched to the a3 side.

The system control unit 21 also controls the overall operation of the facsimile apparatus 20,
In this example, particularly when an incoming call is received, the incoming call is received by the modem 1
0, the facsimile device 20, and the telephone set 30 to identify the incoming call terminal identification means 211.
And a notifying means 212 for notifying the host device 40 of the modem 10 of the information of the receiving terminal identified by the identifying means 211 via the communication interface 50, and after the facsimile communication, the telephone line is continuously released without releasing the data. Continuous communication starting means 2 that operates when communicating or talking
13 as its function.

The facsimile communication control unit 24 is, for example,
It is detected that the incoming call is a facsimile incoming call by detecting a CNG (calling tone) signal sent when a facsimile incoming call indicates a facsimile communication. The call detector 25 also detects a call by detecting a signal unique to the call. As a method of detecting this call, for example, a background noise level detection method of the line,
Well-known methods can be used (for example, JP-A-4-11565).
The receiving terminal identification means 211 of the system control unit 21 uses the CNG signal detection signal (facsimile incoming detection signal) from the facsimile communication control unit 24 and the call detection signal (telephone incoming detection signal) from the call detection unit 25. ) And from which terminal the incoming call is. The fact that the incoming call is a data communication to the modem is identified because it is neither a facsimile incoming call nor a telephone incoming call.

As described above, in the steady state, the modem 1
The switch circuit SW1 of 0 is the b1 side, and the facsimile device 2
The switch circuit SW2 of 0 is the b2 side, the switch circuit SW3
Is connected to the a3 side. From this state, modem 1
0, the facsimile device 20, and the telephone 30 can call without any problem.

That is, from the host device 40 to the modem 10
When a call origination request is sent to the data communication control unit 11
Switches the switch circuit SW1 to the a1 side. As a result, the telephone line L is connected to the data communication control unit 11 and data communication can be started. During the data communication in the modem 10, the switch circuit SW1 is switched to the a1 side, so that the data communication is not interrupted even when the facsimile device 20 or the telephone 30 makes a call request.

Next, from the steady state, the facsimile machine 20
In, when the transmission start procedure is executed, the system control unit 21 switches the switch circuit SW2 to the a2 side.
Therefore, the facsimile communication can be performed via the facsimile communication control unit 24. At this time, the facsimile device 20 notifies the host device 40 via the communication interface 50 that the telephone line L is being used. By this notification, the host device 40 that recognizes that the telephone line L is being used
Disables the transmission from the modem 10.
Therefore, even if there is a call origination request from the modem 10, the facsimile communication is not interrupted by this. Further, since the switch circuit SW2 is switched to the side a2, it is not possible to make a call from the telephone 30 during the facsimile communication. Therefore, the call from the telephone 30 does not interrupt the facsimile communication.

Further, when the telephone 30 makes an outgoing call operation from the steady state, the telephone line L and the telephone 30 are connected to each other, and a telephone call can be performed. At this time, the modem 30 and the facsimile device 20 use the off-hook detectors 13 and 23 to make the telephone 3
An off hook of 0 is detected, the telephone line is recognized as being in use, and the call is not interrupted.

Next, the incoming operation of the communication terminal device of the first embodiment described in FIG. 1 will be described. In this example, when the facsimile device 20 receives an incoming call, the receiving terminal identifying means 21 determines which terminal the incoming call is to.
If the incoming call is identified as 1 and the incoming call is a telephone call or a facsimile call, the system control unit 21 controls the line connection to execute the operation when the telephone call is received by the telephone 30 or the facsimile apparatus 20 itself receives the facsimile.
If the data communication is received by the modem 10, the notification means 212 notifies the data communication of the host device 40 via the communication interface 50. The host device 40 receives the notification of the incoming data communication from the modem 10
It controls the data communication control unit 11 to control the line connection and execute the data communication. When the incoming call is a telephone call or facsimile communication,
It also controls the modem 10 so that it is not connected to the telephone line L.

FIG. 2 is a flow chart of the incoming call processing in the system control unit 21 of the facsimile apparatus 20 and performs the following operations.

The call signal from the telephone line L at the time of an incoming call is recognized by the system controller 21 through the call signal detector 22 of the facsimile device 20 (step S1). As a result, the system control unit 21 switches the switch circuit SW2 to a2.
Then, the telephone line L is connected to the facsimile communication control unit 24 and the call detection unit 25 (step S2).

The facsimile communication control unit 24 detects the CNG signal indicating the facsimile communication (step S
3) As described above, the call detector 25 detects a call by detecting a signal peculiar to the call (step S).
4). The system control unit 21 monitors these results for a preset time (step S5), and CNG
If a signal is detected, it is determined to be facsimile communication, if a call is detected, it is determined to be a call, and if neither is detected, it is determined to be data communication.
That is, the receiving terminal identifying means 211 works.

If the CNG signal is detected in step S3 and it is determined to be facsimile communication, the switch circuits SW2 and SW3 are left in the connected state and the normal facsimile reception operation is performed.

When the call is detected in step S4 and it is determined that the call is made, the system controller 21 switches the switch circuit SW3 to the side b3 (step S8), drives the call signal generator 26, and sets the telephone 30. A call signal is sent to call the called party (step S9). Then, while the call is being made, the off-hook of the talked person is monitored through the off-hook detection unit 23 (step S10),
If off-hooked, the switch circuit SW3 is switched to the a3 side and the switch circuit SW2 is switched to the b2 side (step S1.
1) Connect the telephone line to the telephone. Then, when the off-hook detecting unit 23 detects that the call is ended and the telephone 30 is on-hook (step S12), the incoming call routine is ended.

When it is determined in step S5 that the CNG signal has not been detected even after the elapse of a predetermined time, and that it has not been identified as an incoming call, the system control unit 21
Determines that the incoming call is data communication, and communication interface 5
0, the system control unit 2 of the facsimile device 20
1 notifies the host device 40 of the incoming data communication (step S6).

Upon receipt of this notification, the host device 40 instructs the modem 10 to connect the line. The data communication control unit 11 of the modem 10 switches the switch circuit SW1 to the a1 side and starts data communication.

After notifying the host device 40 of the incoming data communication, the system control unit 21 of the facsimile device 20 thereafter switches the switch circuits SW2 and SW3 to the initial state (step S7) and ends the incoming call routine.

Next, a case will be described in which the modem 10, the facsimile device 20 and the telephone 30 are switched to continue communication during one outgoing call.

In the facsimile device 20, when the continuous communication is reserved during the start of the facsimile communication or during the facsimile communication, the continuous communication starting means 213 of the system control unit 21 after the end of the facsimile communication and before the release of the telephone line. To start up. When activated, the continuous communication activation means 213 performs exactly the same operation as when an incoming call arrives at the terminal specified at the time of reservation.
Reservation for continuous communication is made from an input key operation unit (not shown) of the facsimile device 20 and also to the host device 4.
0, can be performed by an instruction from the facsimile machine of the other party.

For example, when the data communication is set as the continuous communication by the input key during the facsimile communication, the system control unit 21 performs the same operation as the incoming of the data communication after the end of the facsimile communication. That is, the notification unit 212 notifies the host device 40 of the incoming data communication via the communication interface 50. As described above, the host device 40 receives the notification and then the modem 1
0 is connected to the line and controlled to perform data communication.
Similarly, when a call is set as continuous communication, the system control unit 21
The line switching operation is performed in exactly the same manner as when a call is received, and the telephone line L is shifted to the state of the call by the telephone 30.

When the line is handed over to the modem 10 or the facsimile device 20 after the telephone call by the telephone 30, the operation can be performed by the speaker.

When the line is transferred to the facsimile device 20 or the telephone 30 after the data communication by the modem 10, the caller / facsimile communication activation means 41 of the host device 40 operates. For example, by making a reservation in advance in the host device 40 as to whether to perform facsimile communication or call after data communication, the activation means 41 is activated, and the communication interface 5 to the facsimile device 20 is activated.
A facsimile communication request or a call request is issued via 0. In this case, the reservation of continuous communication can be made by an instruction from the input key operation unit of the control host 40 or an application switch, or the other party host device communicating with the facsimile device 20 or the modem 10.

FIG. 3 shows a flowchart of the operation of the system controller 21 of the facsimile apparatus 20 at this time.

The host device 40 is the facsimile device 20.
When a request for facsimile communication or call is issued to
The system control unit 21 of the facsimile device 20 detects this (step S21). Upon receiving this communication request, the system control unit 21 determines whether the communication request is a facsimile communication request or a call request (step S2).
2). When the request is for facsimile communication, the system control unit 21 switches the switch circuit SW2 to the side a2 (step S23), and notifies the host device 40 of the completion of preparation for facsimile communication (step S24).

In response to this notification, the host device 40 switches the switch circuit SW1 to the b1 side, and the facsimile device 2
Facsimile communication is activated in the system controller 0. Upon receiving this activation command (step S25), the system control unit 21 starts facsimile reception processing.

On the other hand, when the communication request is a call,
The system control unit 21 switches the switch circuit SW2 to the b2 side and switches the switch circuit SW3 to the b3 side (step S26). Then, the calling signal generating unit 26 is driven (step S27), and a calling signal is sent to the telephone 30 to call the speaker. Then, the system control unit 21 keeps the off-hook detection unit 23 during the call.
Monitor the off-hook of the talkee through (step S2
8) If off hooked, switch circuit SW3 to a3
To the side (step S29). Then, the system control unit 21 notifies the host device 40 that the preparation for the call is completed (step S30).

In response to this notification, the host device 40 switches the switch circuit SW1 to the b1 side, so that the line is connected to the telephone 30 and the call state is set.

FIG. 4 shows a call sequence between the host device 40 of the modem 10 and the system control unit 21 of the facsimile device 20 when the data communication is received and when the facsimile communication is started after the data communication.

In the first embodiment of FIG. 1, the receiving terminal identifying means is provided in the facsimile device 20 to control the selection of all the receiving terminals, but the receiving terminal identifying means is provided in the modem. You can also FIG. 5 is a block diagram showing the configuration of the second embodiment in which the receiving terminal identifying means is provided in the modem.

In FIG. 5, reference numeral 60 is a modem, 70 is a facsimile device, and 80 is a host device for the modem 70. The modem 60, the facsimile device 20, and the telephone 30 are cascade-connected (cascaded) to the telephone line L, and the communication interface 50 connects the host device 80 and the facsimile device 70. Is similar to the example of FIG. Also in this example, the order of connection to the telephone line L is not limited to the example shown in the figure, but may be arbitrary.

In the case of this example, the modem 60 has a system controller 61, a call signal detector 62, an off-hook detector 63, a data communication controller 64, and a call detector 65.
And a changeover switch SW4 for changing over the line connection for data communication in the modem 60. In this example, the line connection terminal 60L is connected to the telephone line L, and the telephone terminal connection terminal 60T is the facsimile apparatus 7.
0 line connection terminal 70L.

The ringing signal detector 62 is the same as the ringing signal detector 12 of FIG. The data communication control unit 64 controls data communication in the modem 60. In this example, the data communication control unit 64 has a function of detecting a CNG signal like the facsimile communication control unit. The call detector 65 is shown in FIG.
This is the same as the call detection unit 25 in the above example. From the outputs of the data communication control unit 64 and the call detection unit 65, the system control unit 61 identifies the called terminal.

The system controller 61 switches the switch SW4 to control the line connection. When performing data communication with the other party via the line L, the switch SW4 is switched to the a side. When the facsimile device 70 or the telephone 30 performs facsimile communication or a telephone call, the switch SW4 is switched to the b side. In a steady state such as an incoming call waiting state, the switch SW4 is switched to the b side.

The facsimile apparatus 70 and the system control unit 71 are provided with a changeover switch circuit S for performing line connection switching for facsimile communication and telephone communication.
W5 and SW6, ringing signal detector 72, telephone 30
An off-hook detecting section 73 for detecting the off-hook of the above, a facsimile communication control section 74 for performing facsimile communication,
A call signal generator 75 for supplying a call signal to the telephone 30. Then, the telephone 30 is connected to the telephone terminal connection terminal 70T of the facsimile device 70.
The facsimile device 70 in this example does not have a function of identifying the called terminal, and the modem 60 in this example plays a role equivalent to that of the facsimile device 20 in the example of FIG.

The system control unit 71 has a switch circuit SW.
5 and SW6 are controlled to be switched to perform line connection control as to whether to perform facsimile communication or telephone call by telephone 30. In the steady state, the switch SW5 is switched to the b side and the switch SW6 is switched to the a side.

The system control section 71 also controls the overall operation of the facsimile apparatus 70.
In this example, the function of the receiving terminal identifying means is not provided as described above, and the continuous communication starting means 711 that operates when the data communication or the telephone call is continued without releasing the line after the facsimile communication is used as its function. Prepare

In this example as well, similar to the example of FIG. 1, transmission can be performed from any terminal without any problem.

In the case of this example, the system control unit 61 identifies the receiving terminal when receiving a call. That is, when there is an incoming call, the system control unit 61 detects it from the detection output from the calling signal detection unit 62. And the switch circuit S
W4 is switched to the a side, and the receiving terminal is identified from the signals from the data communication control unit 64 and the call control unit 65. If the incoming call is a data communication, the data communication mode is directly entered.

When the incoming call is a facsimile incoming call or a telephone incoming call, the fact is notified to the system control unit 71 of the facsimile device 70 via the host device 80 and the interface 50. From this notification, the system control unit 71 of the facsimile device 70 switches the switch circuits SW5 and SW6 in the same manner as in the example of FIG. 1, and if the incoming call is a facsimile incoming call, performs line connection control during facsimile communication. If the incoming call is an incoming call, the line connection control during the call is performed.

When a continuous communication is performed by another terminal while maintaining the line after the predetermined communication and the data communication is changed to the facsimile communication or the telephone call, the activation means 81 of the host device 80 is used. Can be performed by using the same control as that of the incoming call.

Further, in the case of data communication subsequent to facsimile communication in the facsimile device 70, it is possible for the system control unit 711 to activate the modem 60 via the host device 80. The continuous control from the facsimile communication to the call is performed by the system control unit 7 of the facsimile device 70.
1, the line control can be easily performed by the switch circuits SW5 and W6.

In the case of the example of FIG. 5, the modem 6
0 and the facsimile device 70 need to be changed differently from those on the market.

[0081]

As described above, according to the present invention, a modem, a facsimile machine, and a telephone connected to one telephone line can be automatically switched appropriately in accordance with the contents of communication when receiving a call. You can

In addition, by performing bidirectional communication between the host device of the modem and the facsimile device, the line can be freely transferred between the modem, the facsimile device, and the telephone, and data can be transmitted and received during one call. Communication, facsimile communication, and communication different from each other can be performed, and the communication can be switched over and over again.

Further, regarding the transmission from the modem, since the modem, the facsimile device and the telephone are connected in cascade, no problem occurs.

[Brief description of drawings]

FIG. 1 is a block diagram of a first embodiment of a communication terminal device according to the present invention.

FIG. 2 is a flowchart of the operation of the first embodiment of the communication terminal device according to the present invention.

FIG. 3 is a flowchart of the operation of the first embodiment of the communication terminal device according to the present invention.

FIG. 4 is a diagram showing a communication sequence between the modem host device and the facsimile device of the first embodiment of the communication terminal device according to the present invention.

FIG. 5 is a block diagram of a second embodiment of a communication terminal device according to the present invention.

FIG. 6 is a block diagram showing a conventional automatic switching control system between a facsimile device and a modem.

FIG. 7 is a diagram showing a connection example when three types of terminals are connected to one telephone line.

[Explanation of symbols]

10, 60 modem 11, 64 data communication control unit 12, 22, 62 call signal detection unit 23, 73 off-hook detection unit 20, 70 facsimile device 21, 61, 71 system control unit 24, 74 facsimile communication control unit 25, 65 call Detecting unit 26, 75 Calling signal generating unit 30 Telephone 40, 80 Host device 41, 81 Calling / facsimile communication starting means 50 Communication interface 211 Called terminal identifying means 212 Notification means 213, 711 Continuous communication starting means

Claims (2)

[Claims] 1. A modem connected to the data processing device,
A facsimile machine connected to the data processing apparatus via a communication interface and a telephone are cascade-connected to one telephone line, and the facsimile machine makes a first connection between itself and the telephone line. A communication terminal device that performs control and a second connection control between the telephone and the telephone line, and the data processing device performs a third connection control between the modem and the telephone line. One of the modems, the receiving terminal identifying means for determining whether the incoming call is the incoming data to the modem, the incoming call to the facsimile device, or the incoming call to the telephone, and the incoming call to the data processing device. Means for notifying the identification output of the terminal identification means, wherein the facsimile apparatus is configured to transmit the first output based on the identification output of the receiving terminal identification means. And the second connection control,
The data processing device is a communication terminal device configured to perform the third connection control based on the identification output of the receiving terminal identification means. 2. The communication terminal device according to claim 1, wherein the data processing device is connected to the data processing device via the communication interface while maintaining a connection state of a telephone line after data communication by the modem. First activating means for activating the facsimile device to enter the facsimile communication mode or the call mode is provided, and the facsimile device is provided with the above-mentioned communication while maintaining the connection state of the telephone line after the end of the facsimile communication or the call. A communication terminal device provided with a second activation means for activating the data processing device via an interface to bring it into a data communication mode.