JPH05207180A - Isdn connection system - Google Patents

Abstract

PURPOSE:To prevent the system from being complex and the operation from being complicated by providing a switching means in the same circuit of an ISDN board for connection to a telephone line and an ISDN line. CONSTITUTION:In the circuit of an ISDN board 1, as a telephone line switching means, a switching circuit 17 switches a MODEM 23 for modulating data to be transmitted to the telephone line to analog data and demodulating digital data from the telephone line and a CODEC 19 for converting the analog data received from the telephone line to digital data and converting digital signals transmitted from the ISDN line to analog signals. Similarly, as an ISDN line switching means, a switching circuit 11 switches the circuit 23 and the CODEC 19 and by providing two kinds of switching means in the same circuit, the ISDN connector prevents being complicated and complicating the operation and improves convenience.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention prevents, from among ISDN connection devices for connecting a telephone line and an ISDN line, particularly a circuit for connecting to the telephone line and the ISDN line to prevent the device from becoming complicated. , ISD to improve convenience
N connection device.

[0002]

2. Description of the Related Art In recent years, an integrated service digital communication network (hereinafter referred to as ISDN), which is an integrated digital communication network that comprehensively handles services such as telephones, telegraphs, telexes, facsimiles, etc., has been used.

When communicating with the other party who has subscribed to the ISDN line to use the ISDN, the ISDN
I equipped with S interface etc. for connecting to the line
Connect the SDN board to the ISDN line.

On the other hand, when communicating with a partner who has not joined the ISDN line, since the size of the connector of the ISDN board and the communication protocol are different, a telephone line equipped with a modem circuit or the like for using a general telephone line. It was necessary to tie the board to the telephone line. Therefore, ISD
It is not easy to prevent the apparatus from becoming complicated because the board for N having the board for N and the board for telephone line is connected to the tangent board depending on whether or not the other party has joined the ISDN line.

[0005]

However, conventionally, when the communication partner subscribes to the ISDN line, I
Since the ISDN board is connected to the SDN line and the telephone line board needs to be connected to the telephone line when the ISDN line is not subscribed, there is a problem that the device becomes complicated and the operation becomes complicated. there were.

The present invention has been made to solve such a conventional problem, and an object thereof is to prevent the apparatus from becoming complicated and to prevent the operation from being complicated, thereby improving the convenience of the apparatus. Another object of the present invention is to provide an ISDN connection device that improves the communication quality.

[0007]

To achieve the above object, the present invention provides a modem circuit for modulating data to be transmitted to a line into analog data and demodulating data received from the telephone line into digital data. The analog signal received from the telephone line is converted into a digital signal, and I
A codec for converting a digital signal transmitted from an SDN line into an analog signal,

A telephone line switching means for switching the codec and the modem circuit to connect to a telephone line, a data conversion circuit for converting the data to be transmitted and received on the ISDN line, and the data conversion circuit and the codec. An ISDN line switching means for switching and connecting to the ISDN line is provided.

[0009]

With the above configuration, the communication partner is the ISDN.
When the line is subscribed, the ISDN line switching means is switched to the data conversion circuit side to transmit / receive data to / from the ISDN line. Also, in order to realize voice communication,
The telephone line switching means is switched to the codec side, the ISDN line switching means is switched to the codec side, and the ISDN line is transmitted.

On the other hand, when the communication partner is not subscribed to the ISDN line, the telephone line switching means is switched to the modem circuit side to transmit / receive data to / from the telephone line, so that the apparatus can be prevented from being complicated.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the control of an embodiment of the ISDN connection apparatus of the present invention.

In FIG. 1, an ISDN (Integrated Service Digital Communication Network) board 1 is connected to an ISDN line for handling different services such as telephone, telex, facsimile and videotex and a telephone line which is a public line. Further, the ISDN board 1 is connected to a microprocessor 3 which transmits / receives data to / from a communication partner via an ISDN line or a telephone line.

The ISDN board 1 is provided with the circuits described below.

First, the data conversion circuit 5 is a circuit for converting the data output from the microprocessor 3 into a digital signal for transmission to the ISDN line. The command control unit 7 decodes the command input from the data conversion circuit 5 and switches the switching circuit 11 described later. The S interface 9 includes a switching circuit 11 and is an interface section between the microprocessor 3 and the ISDN line. The switching circuit 11 is switched to the interface 13 side or the codec 19 side described later by the control of the command control unit 7. The interface 13 is an interface unit with the ISDN line.

On the other hand, the interface 15 connected to the telephone line is connected to the switching circuit 17. Switching control of the switching circuit 17 is performed by a command control unit 21, which will be described later, and data transmitted via the telephone circuit is switched to the modem circuit 23 side or the codec 19 side.

The codec 19 converts an analog signal into a digital signal, converts the processed digital signal into an analog signal again, and is dedicated to voice. The command control unit 21 includes the microprocessor 3
Then, the switching command transmitted from is decoded and the switching control of the switching circuit 17 is executed. The modem circuit 23 is
The data transmitted from the microprocessor 3 is modulated into analog data, or the data transmitted from a general telephone line is demodulated and transmitted to the microprocessor 3.

Next, the operation of this embodiment will be described.

First, the ISDN board 1 is an ISDN line,
After connecting to the telephone line and the microprocessor 3, the system starts up.

When the communication partner subscribes to the ISDN line, the microprocessor 3 transmits the transmission data from the data conversion circuit to the command control unit 7. The command control unit 7 decodes the switching command transmitted from the microprocessor 3 and the switching command is on the ISDN line side. Therefore, the switching circuit 11 is switched to the ISDN line side and the transmission data is transmitted via the interface 13.
Sent on SDN line. Further, since voice communication is also possible, the command control unit 2 transmits the switching command set in the file transmitted from the microprocessor 3.
1 decodes the switching circuit 17 into the codec 19
Switching to the side, the voice is converted into a digital signal by the interface 15, the switching circuit 17, and the codec 19 and transmitted to the ISDN line via the S interface 9 and the interface 13.

On the other hand, when the communicating party does not subscribe to the ISDN line, the microprocessor 3 transmits a switching command to the command control unit 21 to send the switching circuit 1 to the switching circuit 1.
7 is switched to the modem circuit 23 side. Modem circuit 2
Since it is switched to the 3 side, the voice transmitted by the telephone line is converted into digital data by the demodulation of the switching circuit 17 and the modem circuit 23 and transmitted to the microprocessor 3.

Next, when transmitting data from the microprocessor 3 to the telephone line, the data is transmitted from the microprocessor 3 to the modem circuit 23, modulated into analog data by the modem circuit 23, and transmitted through the switching circuit 17 and the interface 15. Sent to the telephone line.

As a result, since one ISDN board can be connected to the ISDN line and the telephone line, it is not necessary to provide the ISDN line board and the telephone line board as in the conventional case, so that the apparatus is prevented from being complicated. The convenience of operation can be improved.

[0024]

As described above, according to the present invention, since the switching means for connecting to the telephone line and the ISDN line is provided in the same circuit, the device is prevented from being complicated and the operation is complicated. By preventing, the convenience of the device can be improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing control of an embodiment of an ISDN connection device of the present invention.

[Explanation of symbols]

 1 ISDN board 7, 21 Command control unit 5 Data conversion circuit 9 S interface 11, 17 Switching circuit 23 Modem circuit

Claims (1)

[Claims] 1. A modem circuit for modulating data to be transmitted to a telephone line into analog data and demodulating data received from the telephone line into digital data, and an analog signal received from the telephone line to a digital signal. Then, a codec for converting a digital signal transmitted from the ISDN line into an analog signal, a telephone line switching means for connecting the codec and the modem circuit to the telephone line, and data for transmitting / receiving to the ISDN line. A data conversion circuit for conversion, and the data conversion circuit and the codec are switched to change the I
An ISDN connection device comprising: an ISDN line switching means for connecting to an SDN line.