JPS61247147A - Initial setting method for modulator-demodulator - Google Patents

Abstract

PURPOSE:To change over dynamically the setting of a modulator-demodulator or its setting change by registering the initial setting information of the modulator-demodulator and reading it at the start or the replacement of a communication control program for initial setting. CONSTITUTION:The initial setting information 71, 72-of the modulator- demodulator 4 is formed at the same time when the communication control programs 31, 32-are formed and stored in a library 11 corresponding to the programs 31, 32-. In starting the program 31 to connect a terminal equipment 5 with a communication line 6, the program 31 is read from the library 11 by the command from a host processor 1 and sent to a communication control section 2 and an initial setting information 71 is sent to the modulator- demodulator 4.

Description

[Detailed Description of the Invention] [Summary] Necessary initial setting information is read from the initial setting information of the modulation/demodulation device registered in advance at the time of startup or replacement of the communication control program, and based on this, the initial setting information of the modulation/demodulation device is read out. By performing the settings, the initial settings of the modulation/demodulation device can be performed reliably, thereby preventing the occurrence of interface errors with the host.

[Industrial application field]

The present invention relates to an initial setting method for a modulation/demodulation device connected to a communication line between a host processor and a terminal device.

[Conventional technology]

A modem is required to communicate between a host processor and a terminal device using a communication line. Before starting communication, the modem needs to set a speed value and a timer value in accordance with the communication speed of the host processor.

If the modem used to connect the above communication line is a device that can support the maximum speed length (e.g. 48008P, S), the modem used to connect the above communication line may be compatible with a lower speed length (e.g. 2400BPS).
) can also be handled.

However, in order to perform communication between a host processor and a terminal device with different transmission control procedures using the same line, a communication control program (hereinafter abbreviated as NCP) on the host processor side is required.
It is necessary to replace the modem, and along with this, the modem settings (speed, timer value), etc. must also be changed.

[Problem that the invention seeks to solve]

Setting and changing the settings of the modem described above is done manually, which is time-consuming in remote locations, and may result in interface errors with the host, resulting in failure to connect the communication line.

Therefore, the present invention makes it possible to select modem setting values according to the NCP used, performs initial settings of the modem using the selected initial setting values, and dynamically changes modem attributes (setting values). The purpose is to provide a method to do this.

[Means for solving problems]

Therefore, in the present invention, the initial setting information of the modem is registered in advance on the host processor side, and the
When the CP is activated, prior to communication, necessary information is sent to the modem from among the initial setting information of the modem, and the modem performs its own initial settings based on this information, or The above-mentioned various initial setting information patterns are built into the ROM, the host specifies the required pattern number, and the modem reads the initial setting information corresponding to this pattern number from the ROM, and performs its own initial setting based on this. By making settings, it is possible to dynamically switch the attributes of the modulation/demodulation device.

[For production]

The above initial setting information is created in correspondence with the communication control program, and when the NCP is started or replaced, the NCP
The one corresponding to is selected. Therefore, there will be no modem setting errors, and dynamic operation of the NCP will be possible.

〔Example〕

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

FIG. 2 is a block diagram showing the main part of the configuration of the first embodiment of the present invention, in which the initial setting information 71 of the modem 4
．． 72. -..., the corresponding Le N CP31.32゜...
・Also, N provided on the host processor 1 side.
This is an example of registering in the CP library 11 in advance.

The above initial setting information? 1.72. ...is, N CP3
1. When creating 32°..., define modem setting values as parameters and create them at the same time. Created initial setting information 7
1°72,-- is NCP31.32. -... and stored in "'CN CP Live 51/1".

Now start the NCP 31 and control the terminal device 5.
Let's consider a case where an attempt is made to connect the following via the communication line 6.

NCP31 performs NC according to a command from host processor 1.
The data is read from the P library 11 and sent to the communication control unit 4. Further, the corresponding initial setting information 71 is read out and sent to the two modems 4 via the communication control section 2.

The modem 4 stores the received initial setting information 71 in an internal table, and performs its own settings based on this. Thereafter, a set completion signal is returned to the host processor l.

With the above steps, the settings for the network system are completed.
After that, general communication will be possible.

According to this embodiment, the modem 4 is initialized based on the initial setting information selected corresponding to the NCP 3 to be activated, thereby eliminating modem setting errors due to operator illusions or input errors.

FIG. 3 is a block diagram of a main part showing the configuration of a second embodiment of the present invention. In this embodiment, initial setting information 7 is stored in advance in a ROM (read-only storage device) 12 in the modem 4. This is an example.

In this embodiment, as shown in FIG. 4, each initial setting information 71, 72. ... is the respective setting value 81,
82. ... and their respective recognition codes 91.92. ...
It consists of

Now, in the communication control unit 2, the NCP is replaced with NCP31.
Assume that you are trying to start 32. In this case, the host processor 1 stops the running of the NCP 31 which is no longer needed, and then loads the NCP 32 into the communication control unit 2. At the same time, the recognition code (■ in this example) 92 stored corresponding to the NCP 32 is sent to the modem 4 (see the dashed line in FIG. 3).

Modem 4 sets the setting value 82 indicated by the specified recognition code ■ to R.
It reads from OM12 and operates based on this.

The above initial setting information 7 is set in advance for each NCP when the modem is installed.
31.32. ...and set it in sync with RO.
In addition to storing this recognition code in M12, this recognition code 91°92,
... to the NCP library 11. NCP31.32.
It is stored in correspondence with...

In this embodiment as well, the modem 4
Since the settings are selected and executed in accordance with the activated NCP 3, mistakes in setting the modem 4 are eliminated.

〔Effect of the invention〕

As explained above, according to the present invention, modem setting errors are eliminated and NCP activation or switching can be performed dynamically.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of main parts showing the configuration of the present invention, Fig. 2 is a block diagram of main parts showing a first embodiment of the invention, and Fig. 3 is a block diagram of main parts showing a second embodiment of the invention. Block diagram FIG. 4 is a diagram showing the structure of the contents of the ROM. In the figure, ■ is a host processor, 2 is a communication control unit,
3 is a communication control program (NCP) 4 is a modem (modem), 5 is a terminal device, 6 is a communication line, 7 is initial setting information, 11 is an NCP library, 1st cause 2nd figure ROM To beak blade 114 figure

Claims (1)

[Claims] A host processor (1), a communication control unit (2), and a communication control program (3) running within the communication control unit (2).
), a modem (4), and a communication line (6), in which at least one type of initial setting information (7) of the modem (4) is registered in advance;
Before starting communication by starting or replacing the communication control program (3), the host processor (1)
selects the initial setting information (7) corresponding to the activated or replaced communication control program (3) from the pre-registered initial setting information (7), and sets the initial setting information (7) to the selected initial setting information (7). An initial setting method for a modulator and demodulator, characterized in that the initial setting of the modulator and demodulator (4) is performed based on the method.