JPS632442A - Communication control equipment - Google Patents

Abstract

PURPOSE:To quickly and surely investigate the cause of a fault without connecting a data scope, etc., in series, by providing a data tracing section and successively recording data on a communication line. CONSTITUTION:The transmission and reception by a communication line are controlled by a circuit control section 1 and the delivery and receipt of data transmitted through the communication line are controlled at a processing section 2. A data tracing section 3 is also connected to the communication line and data on the communication line are successively recorded. Based on the record, the cause of a fault can be investigated quickly and surely without connecting a data scope, etc., in series.

Description

[Detailed Description of the Invention] [Summary] A data trace unit is provided in a communication control device installed in each computer, etc. that makes up a computer network and controls data transmission and reception, and records data necessary for investigating the cause of a failure. It has been made possible.

[Industrial application field]

The present invention relates to improvements in communication control devices.

Computers and workstations connected to form a network (together referred to as computers, etc.)
In order to perform basic communication control, including detection of 9 line control code, error detection, and monitoring of communication line status during data transfer with other computers, etc., each A control device is provided.

There are various types of communication control devices depending on the number of lines and the scale of the computer, etc., but the main type is a line control unit for efficiently controlling multiple communication lines.

It consists of a line handling section for controlling the electrical interface with the modem, and a processing section for controlling the exchange of data transmitted via the communication line. Along with this growth, both hardware and software are becoming more complex, and the tendency for errors to occur tends to increase.

At this time, if an error occurs, it is desirable that the cause be investigated promptly.

[Conventional technology]

In investigating the cause of errors in transmitted data, the first step is to find out what changes have occurred in which parts of the transmitted and received data.

For this reason, conventionally, in addition to retransmitting the transmitted data when an error occurs, a device called a datascope or the like is used to observe how the retransmitted data appears on the transmission path on the transmitting or receiving side. A method is adopted in which the data is compared with the retransmitted data.

[Problem that the invention seeks to solve]

The device called a datascope is connected in series to a transmission path and displays detected data in fixed lengths on a CRT or the like for visual observation.

However, since it is necessary to disconnect the transmission line in order to connect in series, there is a problem in that the connection requires time and effort.

[Means for solving problems]

As shown in the principle diagram of FIG. 1, the communication control device according to the present invention is a communication control device provided in each computer, etc. that is connected by one communication line and constitutes a t-network, and is a communication control device that controls the connected communication lines. Part 1. In addition to processing s2 for controlling the exchange of data transmitted via the communication line.

A data trace section 3 is provided for sequentially recording transmitted and received data on a communication line.

[Effect]

When investigating the cause of a failure, data that appears on the transmission path on the sending or receiving side is recorded by the data trace unit 3, and this can be output to a printer or display device, etc. for use in investigating the cause of the failure. .

〔Example〕

FIG. 2 is a configuration diagram of the embodiment, and numerals 41 to 4n common to those in FIG. ).

Reference numerals 31 and 32 denote a trace control circuit and a data storage section which constitute the trace device 3, and 5 a display device with a keyboard provided as an operator interface.

At the sending or receiving end, when an error is detected in the transmission or reception of data and the cause is investigated.

The program of the line control section 1 is activated and the data on the transmission path is recorded in the data storage section 32 via the trace control circuit 31.

The contents of the data storage unit 32 recorded in this way are as follows:
The information can be displayed on the keyboard-equipped display device 6 at any time by operating the keyboard, and can be used to investigate the cause of the failure.

〔Effect of the invention〕

As explained above, in the communication control device of the present invention, it is necessary to connect a data scope or the like each time when investigating the cause of a failure, and therefore the effort required for investigation can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the principle of the present invention. FIG. 2 is a configuration diagram of the embodiment. Also in fig. 1 is a line control unit, 2 is a processing device.

Claims (1)

[Scope of Claims] A line control unit (1) provided in each of computers, etc. that are interconnected by a communication line to form a network, and that controls the connected communication line; What is claimed is: 1. A communication control device comprising: a processing unit (2) for controlling transmission and reception of data on a communication line, the communication control device comprising: a data tracing unit (3) for sequentially recording data transmitted and received on a communication line;