JP2625049B2 - Break signal monitoring time setting method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a break signal monitoring time setting method for recognizing a break signal notified from a communication partner terminal in a communication control processor.

[0002]

2. Description of the Related Art A break signal is a signal for setting a data to binary 0 and transmitting it for a predetermined period in order to asynchronously interrupt a transmitting partner terminal, for example, when requesting reception interruption from a receiving side. . In the TTY procedure and other no-procedures, a break signal is generally used because a specific character cannot have the meaning of an interrupt.

[0003] The transmission period of the break signal differs depending on the type of the nonprocedural terminal. For example, when the terminal operator presses a specific key, a break signal is transmitted only for a predetermined period proportional to the line speed (specified in CCITT Recommendation V.14 and others). Send break signal only during period (CCIT
T. Recommendation X.28 and others). Therefore,
In order to reliably detect the break signal notified from the receiving side, the transmitting terminal needs to set the monitoring time of the break signal corresponding to the partner terminal.

Therefore, conventionally, as shown in FIG. 3, a system builder sets a line speed and separately sets a predetermined break signal monitoring time for the communication control processor 31. The break signal monitoring time set at this time is proportional to the line speed with respect to the regulation, and is independent of the line speed with respect to the regulation.

[0005]

Since a large-scale communication system accommodates a large number of lines, initial setting of the line speed and setting of a break signal monitoring time for each line during system construction work are extremely difficult. It was complicated.

It is an object of the present invention to provide a break signal monitoring time setting method which makes it unnecessary to set a break signal monitoring time for at least a line in which a break signal monitoring time proportional to a line speed is set. With the goal.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a communication control processor in which a line speed and a break signal monitoring time are set corresponding to a line. Break signal monitoring time setting means for automatically generating and setting a break signal monitoring time, and when the line speed and the break signal monitoring time are set, setting the break signal monitoring time with priority. And

[0008]

According to the present invention, the break signal monitoring time proportional to the set line speed is automatically generated at the time of initialization of a line whose break signal monitoring time is proportional to the line speed. It is not necessary to set the monitoring time.

Further, when a break signal monitoring time is not related to the line speed, if a break signal monitoring time is set together with the line speed, the break signal monitoring time automatically generated according to the line speed is invalidated. Alternatively, by stopping the automatic generation function, it is possible to prioritize a given break signal monitoring time, and to cope with setting of an arbitrary break signal monitoring time.

[0010]

FIG. 1 is a block diagram showing an embodiment of a communication control processing apparatus for realizing the method of the present invention.

In the figure, a communication control processor 11 includes:
A break signal monitoring time setting means 15 is provided, in which a system builder inputs line speed information set for the line, automatically generates a break signal monitoring time proportional to the line speed, and sets the break signal monitoring time in the break signal monitoring circuit 13. The automatic generation of the break signal monitoring time proportional to the line speed
The break signal monitoring time corresponding to the line speed is held in advance as table information, and a table is searched based on the line speed and the corresponding break signal monitoring time is output, or the processing is performed based on a predetermined formula. Generate.

Also, the break signal monitoring time setting means 15
If the break signal monitoring time information is input together with the line speed information, stop the automatic generation function of the break signal monitoring time proportional to the line speed, or disable the automatically generated break signal monitoring time, A break signal monitoring time input from the outside is set in the break signal monitoring circuit 13.

FIG. 2 shows a break signal monitoring time setting means 1.
9 is a flowchart illustrating an example of a processing procedure in No. 5. (1) shows an example of a processing procedure accompanying input of line speed information, and (2) shows an example of a processing procedure accompanying input of break signal monitoring time information.

In FIG. 2A, if the break signal monitoring time information is not input when the line speed information is input, a break signal monitoring time proportional to the line speed is held based on the line speed. Search for a table that
The obtained break signal monitoring time is set in the break signal monitoring circuit 13 and the process is terminated. On the other hand, if the break signal monitoring time information is input when the line speed information is input, the process passes the automatic generation processing of the break signal monitoring time corresponding to the line speed.

In FIG. 2B, when break signal monitoring time information is input, the break signal monitoring time is set in the break signal monitoring circuit 13 as it is. In addition,
The line speed information is input before the break signal monitoring time information is input, and the break signal monitoring time corresponding to the line speed is automatically generated by the processing procedure shown in (1), and is already set in the break signal monitoring circuit 13. Also, by setting the break signal monitoring time to be overwritten by inputting the break signal monitoring time information, the break signal monitoring time that is arbitrarily set can be validated by invalidating the automatically generated break signal monitoring time.

If the break signal monitoring time information is input prior to the input of the line speed information, the break signal monitoring time is set in the break signal monitoring circuit 13 and the break signal monitoring time is automatically calculated from the line speed. By passing the processing to be generated, the break signal monitoring time which is similarly set arbitrarily can be made valid.

With this configuration, if the break signal monitoring time set in the break signal monitoring circuit 13 is proportional to the line speed, the break signal monitoring time corresponding to the line speed is automatically set. The system builder need only set the line speed when the system is initialized. If the break signal monitoring time is irrelevant to the line speed, the system builder sets the line speed and the break signal monitoring time at system initialization so that any break signal monitoring time can be set to the break signal monitoring time. It can be set in the monitoring circuit 13. The system builder does not instruct the start of the break signal monitoring.
A communication control processing program in the communication control processing device 11 executes according to a predetermined procedure.

[0018]

As described above, according to the present invention, when the break signal monitoring time is proportional to the line speed, the system builder only sets the line speed and does not need to set the break signal monitoring time. And the initialization work can be simplified.

If the break signal monitoring time is irrelevant to the line speed, the break signal monitoring time set by the system builder can be made valid, so that any break signal monitoring time can be set as before. It is.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of a communication control processing device for realizing the method of the present invention.

FIG. 2 is a flowchart illustrating an example of a processing procedure in a break signal monitoring time setting unit 15;

FIG. 3 is a diagram illustrating a conventional break signal monitoring time setting method.

[Explanation of symbols]

 Reference Signs List 11 communication control processing device 13 break signal monitoring circuit 15 break signal monitoring time setting means 31 communication control processing device

Claims (1)

(57) [Claims] In a communication control processing device in which a line speed and a break signal monitoring time are set for a line, when only the line speed is set, a break signal monitoring time proportional to the line speed is automatically generated. And a break signal monitoring time setting means for setting the break signal monitoring time with priority when the line speed and the break signal monitoring time are set. .