JPH0623091Y2 - Transmission control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is used when transmitting and receiving data between portable electronic devices such as portable word processors and laptop personal computers using public telephones and the like. The present invention relates to a transmission control device.

[Conventional technology]

2. Description of the Related Art Conventionally, an electronic device using a modulator / demodulator (modem) and an acoustic coupler to transmit / receive data to / from an electronic device of a partner is known.

FIG. 4 is a block diagram of an electronic device having a built-in modulation / demodulation device. In this type of electronic device 50, the modulation / demodulation device 51 is directly connected to a telephone line 52 to be used, and a call to the destination electronic device is toned. It is designed to be dialed. The fifth
The figure is a block diagram of an electronic device using an acoustic coupler. A microphone 62 and a speaker 63 are attached to the electronic device 60 via a modulator / demodulator 61, and the microphone 62 and the speaker 63 are connected to a speaker 64 of a telephone 66. , The microphone 65 is connected to the telephone line 52 by making a corresponding dial transmission.

[Problems to be solved by the device]

By the way, the user usually wants to use an electronic device having a built-in modulator / demodulator directly connected to a telephone line, and in some cases, to connect to the telephone line via a public telephone or the like at a place where he / she is out. Sometimes.

However, the electronic device 50 of the type shown in FIG. 4 is not intended to be used via a public telephone or the like and cannot be connected to the telephone line via the public telephone or the like. Also, the electronic device 6 of the type shown in FIG.
In 0, it cannot be directly connected to the telephone line 52,
Further, there is a problem that the dial of the telephone must be turned when connecting to the telephone line 52 via a public telephone or the like.

An object of the present invention is to provide a small transmission control device for connecting an electronic device, which is usually directly connected to a telephone line, to a telephone line via a public telephone or the like. A further object of the present invention is to provide a transmission control device that can be applied regardless of the type of modulation / demodulation device incorporated in an electronic device.

[Means for Solving the Problems]

In order to achieve the above object, the transmission control device of the present invention comprises:
The sound input means, the sound output means, and the signal from the modulator / demodulator built in the electronic device are subjected to a predetermined matrix conversion process and added to the sound output means, and the signal from the sound input means is predetermined matrix converted. It is provided with a matrix conversion means that is processed and added to the modulation / demodulation device, and is detachably attached to the electronic device. Further, the transmission control device of the present invention may be provided with current adjusting means for adjusting the current flowing when connecting to the modulation / demodulation device.

[Action]

The transmission control device having the above configuration is used when an electronic device that is normally directly connected to a telephone line is used via a public telephone or the like. In this case, the transmission control device is connected to the modulation / demodulation device built in the electronic device, and the sound input means and the sound output means of the transmission control device are applied to the speaker and the microphone of the telephone, respectively. When transmitting to the other party's electronic device, a call is made by tone dialing and then data is transmitted. This data is matrix-converted by the matrix conversion means and sent to the telephone line via the sound output means and the microphone of the telephone and sent to the other party. Further, the data from the other party's electronic equipment is sent to the matrix converting means via the telephone line, the speaker of the telephone, and the sound inputting means, undergoes the matrix conversion there, is input to the modulation / demodulation device, and is received by the electronic equipment. As described above, transmission / reception via a public telephone or the like can be performed only by attaching a detachable transmission control device having a simple structure.

Further, by providing a current adjusting means for adjusting a current flowing at the time of connection with the modulation / demodulation device in the transmission control device, any kind of modulation / demodulation device built in the electronic device can be adapted. The transmission controller of the present invention can be connected to any modulator / demodulator by adjusting the current so that

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of a transmission control device according to the present invention. The transmission control device 1 includes an audio input means 2 and
The signals from the sound output means 3 and the modulation / demodulation device 51 of the portable electronic device 50 are subjected to predetermined matrix conversion processing and added to the sound output means 3, and at the same time, the sound input means 2
It is provided with a matrix conversion means 4 for applying a predetermined matrix conversion process to the signal from the device and applying it to the modulation / demodulation device 51, and a current adjustment means 5 for adjusting the current flowing when connecting to the modulation / demodulation device 51, and is detachably attached to the electronic device 50. It can be installed.

In this embodiment, the sound input means 2 has a microphone 6 that receives a sound signal from the speaker 11 of the telephone 10 and converts it into an electric signal, and an amplifier 7 that amplifies the electric signal from the microphone 6. The sound output means 3 amplifies the signal from the matrix conversion means 4 and the microphone 12 of the telephone 10 for converting the electric signal from the amplifier 8 into a sound signal.
And a speaker 9 for inputting. Further, the matrix conversion means 4 is adapted to perform so-called 2-wire 4-wire conversion for converting the 2-wires from the modulator / demodulator 51 into 4-wires.

2 and 3 are diagrams showing specific examples of the transmission control device shown in FIG. 1, respectively. 2 and 3, the current adjusting means 5 is realized by a power source 20 that generates a variable voltage of 6V to 12V, and the matrix converting means 4 is realized by a transformer 21 in FIG. Is provided in the call amplifier 22, for example, ROHM's BA6562. The amplifiers 7 and 8 are composed of transistor logic in FIG. 2, and the call amplifier 22 in FIG.
It is provided inside.

The operation of the transmission control device having such a configuration will be described below.

In FIG. 1, a portable electronic device 50 is usually installed in a predetermined position in a room and directly connected to a telephone line 52 for use. In this case, the transmission control device 1 of this embodiment is not used. When the user carries the electronic device 50 and wants to send and receive it to and from the other party's electronic device from a public telephone, for example, when the user is out of the office, the user first has two terminals of the modulation / demodulation device 51 of the electronic device 50. The terminals T ₁ and T ₂ of the transmission control device 1 according to the present embodiment are connected to the microphones 6 and 9, and the microphone 6 and the speaker 9 are applied to the speaker 11 and the microphone 12 of the telephone 10. Then, if necessary, the voltage of the current adjusting means 5, that is, the voltage of the power source 20 is adjusted. Note that this is performed in order to adjust the current I flowing in the closed loop as shown in FIG. 1 when the transmission control device 1 is connected to the modulation / demodulation device 51, and thereby the modulation / demodulation device connected to the transmission control device 1. 51
The on-hook / off-hook control function in the modulator / demodulator 51 can be adjusted so as to operate properly even if the type is changed.

Thereafter, when transmitting data to the other party's electronic device, the electronic device 50 sends a tone dial. This tone signal is applied from the modulation / demodulation device 51 to the matrix conversion means 4, where it is converted into two lines and four lines and input to the microphone 12 of the telephone 10 via the sound output means 3.
This causes the call to be made. In this state, the electronic device 50
Can transmit data to the electronic device of the other party. That is, the data is input to the microphone 12 via the modulator / demodulator 51, the matrix conversion means 4, and the sound output means 3 in the same manner as the tone signal and transmitted.

On the other hand, data from the other party's electronic device is output as sound from the speaker 11 via the telephone line 52, and this data is received by the sound input means 2 and converted by the matrix conversion means 4 into two-wire and four-wire. Then, the modulation / demodulation device 5 of the electronic device 50
It is received by inputting 1.

As described above, the transmission control device 1 of the present embodiment has a simple structure as specifically shown in FIGS. 2 and 3, so that it can be miniaturized so that it is convenient to carry, It is possible to connect the electronic device 50, which is usually directly connected to the telephone line, to the telephone line 52 via a public telephone or the like by a simple procedure. The call to the other party can be made by the tone dial without turning the dial.
Further, since the current adjusting means 5 is provided, the electronic device 50
The transmission control device 1 can be used regardless of the type of the modulation / demodulation device 51 incorporated in the. However, in the case where the electronic device 50 is provided with the current adjusting means having the same function as this, the current adjusting means 5 may not necessarily be provided. If only a specific type of modulator / demodulator 51 is used, the current adjusting means 5 may generate a constant voltage instead of being variable.

[Effect of device]

As described above, according to the present invention, the transmission control device has a very simple structure including the sound input means, the sound output means, and the matrix conversion means, which is detachable and easy to carry, and is small in size. In addition, the electronic device can be connected to the telephone line via a public telephone, etc. by simply mounting this transmission control device on the electronic device that is normally connected directly to the telephone line, and the dial can be turned. Needless to say, you can make a call to the other party by tone dialing. If the current adjusting means is provided in the transmission control device, the transmission control device can be used regardless of the type of the modulation / demodulation device built in the electronic device.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of a transmission control device according to the present invention, FIGS. 2 and 3 are diagrams showing a concrete example of the transmission control device of FIG. 1, and FIG. FIG. 5 is a configuration diagram of a general electronic device, and FIG. 5 is a configuration diagram of a conventional electronic device using an acoustic coupler. DESCRIPTION OF SYMBOLS 1 ... Transmission control device, 2 ... Sound input means, 3 ... Sound output means, 4 ... Matrix conversion means, 5 ... Transmission control means, 50 ... Electronic equipment, 51 ... Modulator / demodulator

Claims (2)

[Scope of utility model registration request] 1. A sound input means, a sound output means, and a signal from the sound input means, which is applied to the sound output means by subjecting a signal from a modulator / demodulator built in an electronic device to a predetermined matrix conversion process. And a matrix conversion means for applying a predetermined matrix conversion process to the modulation and demodulation device, and is detachably attached to the electronic device. 2. A signal from a sound input means, a sound output means, and a modulation / demodulation device built in an electronic device is subjected to a predetermined matrix conversion process and added to the sound output means, and a signal from the sound input means. Is provided with matrix conversion means for applying a predetermined matrix conversion process to the modulation / demodulation device and current adjustment means for adjusting a current flowing at the time of connection with the modulation / demodulation device, and is detachably attached to the electronic device. A transmission control device characterized in that