JPS596646A - Method for controlling modulator demodulator - Google Patents

Abstract

PURPOSE:To improve the working effect at the setting of an MODEM and to prevent incorrect setting, by setting up the operational state of the MODEM connected to a transmission line by input operation. CONSTITUTION:In a controlling device 1, a generating part 7 adds a control code of a transmission carrier to the information of addresses A-C from an input part 5 and transmits the added information to a transmission line 13. The control signal on the transmission line 13 is guided to the detecting parts 8 of MODEMs 2-4 to discriminate transmission carrier controlling code coincident with the self address, respectively. When the control code goes to ''1'' as the result of the discrimination, transmission request signal controlling parts 11 are actuated, transmission carrier controlling signals (b) are sent and modulating and demodulating parts 10 are set up to the state sending the carrier constantly. When the control code goes to ''0'', transmission request signal (a) inputted to the MODEM are used as the control signals (b).

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control method for setting the operating state of a modem device.

It is necessary to set the operating state using a switch or the like inside the modem according to the mode of use. For example, if a modem and demodulator is used on a direct line with one-to-one communication, the modem and demodulator should be set so that its carrier is always sent to the line. When used in a branch line, the center station modulator/demodulator always sends out that carrier, and the secondary station modem/demodulator sends out the carrier when there is a transmission request from the terminal device. This was done by operating switches within each modulation/demodulation device depending on the mode of use.

For this reason, when installing the modulator/demodulator, a skilled maintenance person must determine the switch settings for each modulator/demodulator, resulting in the disadvantage that incorrect settings may be made during operation, and that setting takes time.

SUMMARY OF THE INVENTION An object of the present invention is to provide a modem control system that eliminates the above-mentioned conventional drawbacks.

According to the present invention, there is a means for setting the own address and a control signal consisting of address information and a control code. a plurality of modulation and demodulation devices equipped with means for identifying the control code and setting the operating state when the address information matches the own address; and input means for inputting connection information of the modulation and demodulation devices from the outside A modulation/demodulation device control method comprising: a control device that receives connection information and determines the operating state that each modulation/demodulation device should have; and a control device that includes a device that generates the control signal based on the output of the control device. is obtained.

The present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of a control device and a modulation/demodulation device used in the present invention.

This embodiment shows an example in which a transmission request signal of a modulation/demodulation device is controlled. In the figure, TS1- indicates the control device>2
+3t4 indicates a modulation/demodulation device.

The control device 1 includes an input section 5 and a control section 6? Control signal generator 7
Is it composed of? The modulation/demodulation device 2, 3 and 4 consists of 2 control signal detection sections, 8 self-address setting switches, 9° modem/demodulation section 10, and a transmission request signal control section 11. Matsu 12
13 is a data transmission line between modulators and a transmission line F is a transmission line for transmitting a control signal. A is a transmission request signal sb that is input to the modulator and demodulator. A transmitter carrier control signal is used to control the transmitter carrier of the modulator and demodulator. .

The modulation/demodulation device 223ν4 is assigned an address by a self-attention setting switch 9 built into each of the modulation and demodulation devices 223ν4. In this embodiment, the addresses assigned to the modulation and demodulation devices 2 and 3) and 4 respectively satisfy A+B>C. To set the operating state of the modem, the operator only needs to input connection information between the modems from the input section 5 of the two control devices 1, and the rest is done automatically. The operation of the present invention will be explained below with reference to FIG.

First, in the case where there is no modem/demodulator 4 and there is only a direct line between the modem/demodulators 2/3, the operator simply inputs the addresses A+B of the two modem/demodulators 2/3 from the input section 5. - For example, enter the character string "AvB". This information is input to the control section 6. The control unit 6 determines that 2 addresses are 2 from this information.
The modulator and demodulator 2ν“3 of the address 5A and B recognizes that this is a direct line.
It is determined that it is sufficient to set the transmission carrier so that it is always output without depending on the transmission request signal a.

By using a microprocessor, for example, in the control section 6, the above identification and determination can be easily realized. The control section 6 sends the result of the above processing to the control signal generation section 7, that is, the control state of the transmission carrier of the modulation/demodulation device for each address. As a result, the control signal generating section 7! The control code of the transmission carrier is added to the information of address A>B, and the information is sent to the transmission path 13. This control signal is shown, for example, in FIG. 2(1). Therefore, in this case, the a transmission carrier suppression code r A + B is both '1' (carrier always transmitted).

Next, in the case of a two-branch line, the operator inputs three addresses and information indicating that the modem 2 is the center station from the input section 5. - For example, enter the character string rA+t13+cJ. Here, the number following A means that A is the center station. What about the control section 6? From this information, by inputting three tour addresses, it is identified that it is a branch line ν and that the modem 2 of address A is the center station, and the transmitting carrier is always transmitted to the modem 2 of address A. It is determined that the setting for transmitting the transmission carrier depending on the transmission request signal a is sufficient for the modulation/demodulation device 3F4 of the transmission address BvC.

This information is input to the control signal generator 7. The control signal generating unit 7 adds a control code of the transmission carrier to the information of quad address A>BvC and sends it to the transmission path 13 . The control signal in this case is shown, for example, in FIG. 2(2).

On the other hand, the control signal ν from the transmission line 13 described above is detected by the control signal detection unit 8 of the modulation/demodulation device 2t3y4. The control signal detection unit 8 detects the transmission line 1 that matches its own address.
Identify the transmit carrier control code following the address information from 3. The control signal detection unit 8 detects 2 if the transmission carrier control code is “1” (transmission carrier is always transmitted).
The transmission request signal control section 11 is controlled so that the transmission carrier control signal inputted to the modulation/demodulation section 10 is set to a state in which the modulation/demodulation section 10 always transmits a carrier regardless of the transmission request signal a. Also? Transmitting carrier control code is °′0°
In this case, the transmission request control unit 11 is controlled so that the ν transmission request signal a becomes the transmission gear control signal of the modulation/demodulation unit 10.

Do it like the north! It is possible to automatically set the transmission carrier control state of each modulation/demodulation device using simple information input from the input unit 5 of the control device 1. In addition, in the above-mentioned embodiments, only the case where the transmission carrier is controlled as the operating state of the modulator/demodulator is described; however, setting of other states can also be easily performed by increasing the number of control codes sent to the transmission path 13. It is clear that it can be done.

Furthermore, in Fig. 1, the data transmission line 12 between the modulators and the transmission line 13 for transmitting control signals are shown separately, but a general second channel is used as a mode of use of the modulator and demodulator. By doing so, the transmission line I2 can also be used in common with the transmission line 13.

According to the present invention (as is clear from the above description).

Since the operating state of the modem connected to the ν modem can be set by a simple input operation, it is possible to improve work efficiency when installing the ν modem and to prevent one erroneous setting.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of a control device and a modulation/demodulation device used in the present invention. FIG. 2 is a diagram showing an example of control signals used in the present invention. Explanation of symbols: 1 is control device + 2 + 3 > 4 is modem device 2
5 is an input section Flow is a control section 7 is a control signal generation section t8 is a control signal detection section 9 is a self-address setting switch 10 is a modulation/demodulation section A 11 is a transmission request signal control section Signals +b represent transmission carrier control signals, respectively.

Claims (1)

[Claims] 1. Means for setting its own address, and means for receiving a control signal consisting of address information and a control code, and identifying the control code and setting an operating state if the address information matches the own address. a plurality of modulation and demodulation devices, and an input means for inputting connection information of the modulation and demodulation devices from outside; a control device that receives the connection information and determines the operating state that each of the modulation and demodulation devices should have; and an output of the control device. and a control device comprising means for generating the control signal.