JP2001016363A - Communication terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To conduct network connection control by providing a fax modem and a data modem in a communication terminal so as to be connected to the same modem even in the case of either of facsimile communication or data communication, and also to smoothly switch network connection control to communication control. SOLUTION: Either a fax modem 16 or a data modem 17 and a tone detection section 15 are used to conduct call control, transmission of a call start signal and detection of a reply signal in facsimile communication and data communication. Then a changeover section 14 selects the connection of the fax modem 16 or the data modem 17 to a telephone line 12 in response to a reply signal from a destination communication terminal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a communication terminal device which can incorporate or connect both a fax modem and a data modem.

[0002]

2. Description of the Related Art With the recent diversification of communications, various communications formats such as facsimile communications and data communications have come to exist in communications using telephone lines. Accordingly, some communication terminals have built-in or connectable both a fax modem and a data modem. These are very convenient because it is possible to support both facsimile communication and data communication by connecting either a fax modem or a data modem to a telephone line according to the communication format.

[0003] It should be noted that related devices of this type are disclosed in JP-A-6-189015 and JP-A-7-058.
877 and JP-A-7-321950.
In these apparatuses, the receiving side automatically determines facsimile communication and data communication when a call is received, and automatically switches between the fax modem and the data modem.
In the technique disclosed in Japanese Patent Application Laid-Open No. 8-317159, a communication device having a facsimile / data communication function is configured to automatically perform facsimile communication after data communication.

[0004]

In the above-mentioned communication terminal device in which both a fax modem and a data modem can be built or connected, call control is performed by each modem in accordance with the communication format. For example, when facsimile communication is performed, call control such as DTMF transmission and call progress tone detection is performed using a fax modem, and when data communication is performed, DTMF transmission using a data modem is performed. Outgoing call control such as call progress tone detection was performed.

In this case, both the fax modem and the data modem have call control means. That is,
As programs related to call control, two types of programs, a case using a data modem and a case using a fax modem, need to be implemented, resulting in functional waste. When the CPUs controlling the two modems are different, the call control program must be installed in each CPU. Further, regarding the evaluation regarding the call control, it is necessary to evaluate both the case where the data modem is used and the case where the fax modem is used. In addition, regarding the approval test of each country regarding call control,
Authorization tests need to be performed for both the use of a data modem and the use of a fax modem.

An object of the present invention is to improve such a problem and provide a fax modem and a data modem, and perform network connection control by connecting to the same modem in both facsimile communication and data communication. It is an object of the present invention to provide a communication terminal device capable of performing such operations.

Another object of the present invention is to improve such a problem and provide a facsimile modem and a data modem, which are connected to the same modem for both facsimile communication and data communication. It is an object of the present invention to provide a communication terminal device that can perform connection control and can smoothly switch from network connection control to communication control.

[0008]

In order to achieve the above object, the inventor of the present application has proposed a call control (transmission of a PB signal, transmission of a PB signal, etc.) in both facsimile communication and data communication.
The present invention has arrived at the present invention by focusing on common network connection control for detection of call progress tones such as dial tone, busy tone, etc.), transmission of a call signal, and detection of a response signal.

According to a first aspect of the present invention, there is provided a data modem for modulating / demodulating code data, a facsimile modem for modulating / demodulating facsimile data, and a network connection control for facsimile communication and data communication. Control means for connecting one of them, and performing network connection control in facsimile communication and data communication by connecting to the same modem.

A second aspect of the present invention provides a data modem for modulating and demodulating code data, a fax modem for modulating and demodulating facsimile data, tone detecting means for detecting a tone signal from a line, and a network in facsimile communication and data communication. Control means for performing connection control using either a fax modem or a data modem and tone detection means, and performing network connection control in facsimile communication and data communication using the same modem and tone detection means. There is a feature to do.

According to a third aspect of the present invention, there is provided a data modem for modulating / demodulating code data, a facsimile modem for modulating / demodulating facsimile data, switching means for switching any one of the facsimile modem and the data modem to connect to a line, and a facsimile. Call control, call signal transmission, and response signal detection in communication and data communication are performed by connecting either a fax modem or a data modem, and then responding to a response signal from the destination communication terminal. Control means for switching the connection with the line to the fax modem or the data modem side, connecting to the same modem, performing call control in facsimile communication and data communication, sending a call signal, and detecting a response signal, Then, switch the modem as necessary according to the response signal from the destination communication terminal. It is characterized by performing signal control.

According to a fourth aspect of the present invention, there is provided a data modem for modulating / demodulating code data, a facsimile modem for modulating / demodulating facsimile data, switching means for switching any one of the facsimile modem and the data modem to connect to a line, Tone detection means for detecting a tone signal from the telephone, call control in facsimile communication and data communication, call signal transmission, and, for response signal detection, one of the fax modem or data modem and the tone detection means Control means for switching the connection with the line to the fax modem or the data modem side in response to a response signal from the destination communication terminal,
Call control, call signal transmission, and response signal detection in facsimile communication and data communication are performed by the same modem and tone detection means, and then, according to the response signal from the destination communication terminal, the modem is activated as necessary. It is characterized by performing communication control by switching.

According to a fifth aspect of the present invention, in the third or fourth aspect, the switching means is provided between the line and the facsimile modem and the data modem. This is characterized in that both the line transformers are switched to connect a line to a fax modem or a data modem.

By doing so, it is possible to use a transformer suitable for the characteristics of each modem properly and smoothly switch from a network connection operation (including a call operation) to a communication operation. If the communication terminal has switching means for switching between the fax modem and the data modem on the modem side rather than the line transformer in the network control unit (NCU), the line transformer conforms to the characteristics of both the fax modem and the data modem. Must be done.

[0015]

An embodiment of the present invention will be described below with reference to the drawings. [First Embodiment] FIG. 1 is a block diagram showing a configuration of a communication terminal device according to an embodiment of the present invention. A communication terminal device 10 is connected to a telephone line 12 and other communication terminals are connected. It is configured to perform data communication or facsimile communication with a terminal device.

The communication terminal device 10 includes a telephone line 12
A network control unit (NCU) 13 for performing network control (line disconnection or connection, etc.) related to the above, and for switching the connection to the telephone line 12 to a facsimile modem 16 having a facsimile communication function or a data modem 17 having a data communication function. Switching section 14, tone detection section 15 for detecting a tone signal from telephone line 12, fax modem 16 for modulating and demodulating facsimile data (image data) when performing facsimile communication, communication data (code data) for performing data communication Modem 17 that modulates and demodulates data, communication terminal device 1
A storage unit 18 for storing information related to call control of 0,
A control unit 19 for performing control relating to overall communication. Network connection control such as transmission of a DTMF signal (or PB signal), detection of a call progress tone such as a dial tone, a busy tone, and the like is performed by using a fax modem 16 and a tone detection unit 15.

Although the switching unit 14 is not shown in detail, for example, a line transformer common to the fax modem 16 and the data modem 17 is provided on the line side, and switching means (corresponding to a switching unit 239 described later) is provided for the modem. Side (between the line transformer and the fax modem 16 and the data modem 17).

Next, control in this embodiment will be described with reference to FIG. FIG. 2 is a diagram to which the invention of claim 4 is applied, and includes control from the start of a call operation to the start of data communication (including network connection control such as call control shown in steps 101 and 102). Show. First, the telephone line 12 is closed by the network control unit 13 to make a call (step 101). Next, in a state where the switching unit 14 is connected to the fax modem 16, the dial tone is detected by the tone detection unit 15 or the fax modem 16 (step 102). If a dial tone is detected here, a DTMF signal is transmitted from the fax modem 16 to make a call (step 103). Next, the fax modem 16 starts sending out a calling signal (CI, CNG, etc.) (step 104), and the tone detector 15 or the fax modem 16 responds to the busy tone and the response signal (CED, ANSam) from the other party. , Etc.) (steps 105 and 106).

Here, when a busy tone is detected,
Judging that the other party is busy, the calling operation is terminated and the telephone line 12
Is released (step 107). When a response signal is detected, it is determined that there is a response from the other party, and the switching unit 1
4 to switch to the data modem 17 side (step 108). Thereafter, data communication is started by the data modem 17 (step 109). The control of the data modem 17 may be performed by the control unit 19 or may be performed by another control unit (CPU) (not shown). When the dial tone detection (step 102) or the response signal from the other party (step 106) is performed, if the signal cannot be detected after a certain period of time, the control unit 19 determines that a time-out has occurred, and performs a call operation. And the telephone line 12 is released (step 107).

In this embodiment, the detection of the dial tone (step 102) and the detection of the response signal from the other party (step 106) are performed as the network connection control, but the detection of the dial tone or the busy tone is additional control. Therefore, it may not be necessary to carry out.

Further, as a configuration in which the tone detecting unit 15 is deleted from the present embodiment (the invention according to claim 4 is applied) (that is, the invention according to claim 3 is applied), dial tone, busy tone, and The detection of the response signal from the other party may be controlled by the fax modem 16.
In this case, other configurations are the same as in the present embodiment. Further, the configuration of the present embodiment (the invention according to claim 4 is applied),
Alternatively, the switching unit 14 may be deleted from the configuration in which the tone detection unit 15 is deleted from the present embodiment (the invention according to claim 3 is applied), and the fax modem 16 and the data modem 17 may be connected in parallel instead. Good. This is a configuration to which the invention described in claim 1 or 2 is applied. In this case, the switching control of the switching unit 14 in the present embodiment is not performed, but other operations are the same as in the present embodiment.

[Second Embodiment] Next, an embodiment to which the invention of claim 5 is applied will be described. Control in the present embodiment (including network connection control such as call control)
Are substantially the same as those in the first embodiment (shown in FIG. 2), and thus description thereof will be omitted. FIG. 3 shows a configuration of a communication terminal device according to the second embodiment of the present invention, and FIG. 4 shows a configuration of a network control unit thereof. This communication terminal device 2
0, a network control unit (NCU) 23 that performs network control (line disconnection or connection, etc.) related to the telephone line 22;
Connection with a fax modem 26 having a facsimile communication function or a data modem 2 having a data communication function
7; a tone detector 25 for detecting a tone signal from the telephone line 22; a facsimile modem 26 for modulating and demodulating facsimile data (image data) when performing facsimile communication; and a communication for performing data communication. A data modem 27 that modulates and demodulates data (code data), a storage unit 28 that stores information related to call control of the communication terminal device 20, and a control unit 29 that performs control related to communication in general. Then, the DTMF signal (or P
Call control such as transmission of B signal), detection of call progress tone such as dial tone and busy tone, and the like are performed using the fax modem 25 and the tone detection unit 25.

The network control unit 23 includes the communication terminal 2
0, a path 232 to the telephone line 22, a path 233 to the fax modem 26, a path 234 to the data modem 27, a line transformer 235 for the fax modem for insulating the telephone modem 22 from the fax modem 26, and a data modem 27. Line switch 236 for isolating the telephone line 22 from the telephone line 22, a switch 237 for closing the line when the fax modem is connected, a switch 238 for closing the line when the data modem is connected, and the fax modem 26 or A switch 239 for switching to the data modem 27.

When the switch 239 is arranged on the modems 26 and 27 side of the line transformers in the network control unit 23, the line transformers must be compatible with the characteristics of both the fax modem 26 and the data modem 27. Therefore, in the present embodiment, the switch 239 is arranged on the telephone line 22 side of the line transformers 235 and 236 in the network control unit 23 so that the characteristics of the line transformer 235 and the data modem 27 adapted to the characteristics of the fax modem 26 are adjusted. A suitable line transformer 236 is provided to be switchable. Also, the switch 237 and the switch 23
8 may be disposed on the telephone line 22 side of the switch 239.

In such a configuration, the switching control from the fax modem 26 to the data modem 27 is performed, for example, by switching the switch 239 from the fax modem 26 to the data modem with both the switches 237 and 238 closed. This is performed by switching to the 27 side.

According to each embodiment, regardless of whether facsimile communication or data communication is performed, network connection control such as call control is performed by connecting to either one of the modems. The program only needs to be implemented for one predetermined modem (for example, the fax modems 16 and 26). Alternatively, even when the CPUs controlling the respective modems are different, the program may be mounted on only one of the CPUs.

Further, according to each embodiment, the evaluation relating to the call control may be performed only for the modem used for the call control. Further, regarding the authorization test in each country regarding the call control, the authorization test may be performed only for the modem used for the call control.

Therefore, it is possible to realize a functionally efficient communication terminal device having a fax modem and a data modem. Note that the tone detectors 15 and 25
Constitute the tone detecting means, the control sections 19 and 29, the network control sections 13 and 23 constitute the controlling means, and the switching section 14, the switch 239 and the like constitute the switching means.

[0029]

According to the first aspect of the present invention, network connection control such as call control (DTMF signal transmission, call progress tone detection, etc.) in facsimile communication and data communication is performed by a fax modem or a data modem. Since either one (same modem) is connected, network connection control (including call control) can be performed by connecting to the same modem in both facsimile communication and data communication.

According to the second aspect of the present invention, network connection control in facsimile communication and data communication is performed as follows.
Since it is performed using either the fax modem or the data modem and the tone detecting means (tone detecting unit), the network connection is controlled by connecting to the same modem in both facsimile communication and data communication. be able to.

According to the third aspect of the present invention, call control and call signal (C) in facsimile communication and data communication.
I, CNG, etc.) and response signals (CED, ANS)
am, etc.) detection is performed by connecting to either the fax modem or the data modem, and then the connection to the line is switched in accordance with a response signal from the destination communication terminal by switching means (switching unit, switching unit) , Etc.), it is possible to connect to the same modem to perform network connection control in both facsimile communication and data communication, and to perform communication control from network connection control. Can be switched smoothly.

According to the fourth aspect of the present invention, with respect to call control, call signal transmission, and response signal detection in facsimile communication and data communication, either one of a fax modem or a data modem and tone detection means are used. After that, the connection with the line is switched to the fax modem or the data modem according to the response signal from the destination communication terminal, so that the same modem is used regardless of whether facsimile communication or data communication is performed. The network connection control can be performed by connecting, and the switching from the network connection control to the communication control can be smoothly performed.

According to a fifth aspect of the present invention, in the third or fourth aspect, the switching means (switching unit, switching unit, etc.)
While connected to the line, it is switchably connected to the fax modem via the fax modem line transformer and is also switchably connected to the data modem via the data modem line transformer. In addition to performing network connection control, it is possible to smoothly switch from network connection control to communication control by properly using transformers suitable for the characteristics of each modem.

[Brief description of the drawings]

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

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

FIG. 3 is a block diagram illustrating a schematic configuration of a communication terminal device according to a second embodiment of the present invention.

FIG. 4 is a block diagram illustrating a configuration of a network control unit according to a second embodiment of the present invention.

[Description of Signs] 10, 20 Communication terminal device 12, 22 Telephone line 13, 23 Network control unit 14 Switching unit 15, 25 Tone detection unit 16, 26 Fax modem 17, 27 Data modem 18, 28 Storage unit 19, 29 Control Part 235 Line transformer for fax modem 236 Line transformer for data modem 237, 238 Switch 239 Switch

Claims (5)

[Claims] 1. A data modem for modulating / demodulating code data, a facsimile modem for modulating / demodulating facsimile data, and a network connection control for facsimile communication and data communication is performed by connecting one of the facsimile modem and the data modem. And a means for connecting to the same modem to perform network connection control in facsimile communication and data communication. 2. A data modem for modulating and demodulating code data, a fax modem for modulating and demodulating facsimile data, tone detecting means for detecting a tone signal from a line, and a fax modem for controlling network connection in facsimile communication and data communication. Or control means for performing the control using one of the data modems and the tone detecting means, and performing network connection control in facsimile communication and data communication using the same modem and the tone detecting means. Communication terminal device. 3. A data modem for modulating and demodulating code data, a facsimile modem for modulating and demodulating facsimile data, switching means for switching any one of the facsimile modem and the data modem to connect to a line, and calling in facsimile communication and data communication. Control, call signal transmission, and response signal detection are performed by connecting either a fax modem or a data modem, and then the connection to the line is made according to the response signal from the destination communication terminal. Or control means for switching to the data modem side, comprising: connecting to the same modem, performing call control in facsimile communication and data communication, transmitting a call signal, and detecting a response signal, and thereafter, from the destination communication terminal. Switching the modem as necessary according to the response signal of Communication terminal device. 4. A data modem for modulating and demodulating code data, a fax modem for modulating and demodulating facsimile data, switching means for switching between the fax modem and the data modem to connect to a line, and detecting a tone signal from the line. Tone detection means, call control in facsimile communication and data communication, call signal transmission, and response signal detection are performed using either the fax modem or the data modem and the tone detection means, and then the other party Control means for switching the connection with the line to the fax modem or the data modem in accordance with the response signal from the destination communication terminal; outgoing call control in facsimile communication and data communication, calling signal transmission, and response signal detection By the same modem and tone detection means, and then According response signal from signal terminal, the communication terminal apparatus and performs communication control by switching the modem as required. 5. The switching means is disposed closer to the line than a fax modem line transformer and a data modem line transformer provided between the line and the fax modem and the data modem, and switches between the line transformers. 5. The communication terminal device according to claim 3, wherein the line is connected to a fax modem or a data modem.