JPS6143044A - Line monitor - Google Patents

Abstract

PURPOSE:To attain ease of fault analysis by checking a sequence number added into information, detecting it at an error detection means at occurrence of a fault at the transmission side and informing it to a terminal device at the transmission/reception side. CONSTITUTION:When a field constitution of a sequence number in information and a revision condition are inputted from a keyboard 7 to a main control section CC3, it is informed to a monitor unit MU1 and an error detection unit EDU2 respectively to start a monitor. The MU1 transmits the monitored information to the CC3, and transfers only the sequence number to the EDU2. The CC3 outputs the information from the MU1 to an input/output section 6. The EDU2 checks the renewal state of the sequence number received from the MU1 and if there is any error, the level of an error detection line 5 is changed and informed to the transmission side terminal device.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a line monitoring device, and more specifically, for example,
The present invention relates to a device for detecting the occurrence of a failure on the transmitting side in a line monitoring device that monitors data such as level 2 data.

For example, ×25 level 2 data transmitted over a line between a terminal and an exchange is structured as shown in FIG. 3(a). This is called low-level data, and in FIG. 3(a), "F" is a flag, 'A' is an address, "C" is a control, "■" is information, and 6FC8 is a frame gate sequence (e.g. Parichi). Information (2) in FIG. 3(a) is further configured as shown in FIG. This is ×2
This is called 5L level 3 data and is shown in Figure 3 (b).
), "LCGN" is the logical channel group number,
“LCN” is the logical channel number, “TYP”, “SQ”
N" are the packet type and sequence, respectively,"
[IATA'' indicates data, respectively. And the third
The data section "DATA-" in the figure) is further added to the data section "DATA-" in the figure
It is configured as shown in C). Figure 3 (0) is user level data, and in Figure 3 ((+)), TN'' is the tenant number, ``TTP'' is the type of user level data, ``TSQ'' is its sequence number, and TDATA''.
indicate user-level data, respectively.
゛ [Prior Art] In order to detect the occurrence of a failure in data in the format shown in Figure 3, the conventional methods were to visually check for sequence errors in the information on the monitor screen, or to display sequence errors on the monitor screen. In either case, it was not possible to reproduce the behavior when a failure occurred on the transmitting side, and the investigation of the cause of the failure could only be done theoretically.

[Problem that the invention seeks to solve]

In view of the above-mentioned drawbacks of the prior art, the present invention can facilitate failure analysis by immediately notifying a monitor device of an error when a failure occurs on the transmitting side.

[Means for solving problems]

The present invention overcomes the drawbacks of the prior art described above and provides an efficient line monitoring device. This is accomplished by a line monitoring device having means for drawing a number, means for checking the sequence number to detect an error, and means for notifying a communication terminal on the transmitting side or the transmitting/receiving side when an error is detected.

[Effect]

In the present invention, the line monitoring device checks the sequence number added to the information, and when a failure occurs on the transmitting side, the above-mentioned entertainment detecting means detects and notifies the transmitting side or one terminal on the transmitting and receiving sides.

〔Example〕

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

FIG. 1 shows a block diagram of one embodiment of the invention.

In Figure 1, 1 is a monitor unit, 2 is an error detection unit, 3 is a main control unit, 4 is a transmission data/reception data line, 5 is an error detection line, 6 is an input/output unit, 7 is a keyboard, and 8 is a display The parts are shown respectively.

In FIG. 1, the main control unit (cc) 3 inputs the field configuration and update conditions of the sequence number SHQ in the information (see FIG. 3(b)) from the keyboard 7, and then controls the monitor unit (MU) 1 and error detection unit) (
f! DU) Notify 2 and start the monitor. The monitor unit 1 sends the monitored information to the main mm section 3 and also transfers only the sequence number SBQ to the error detection unit 2. The main control section 3 outputs information from the monitor unit 1 to the display section 8'. On the other hand, the error detection unit 2 updates the sequence number received from the monitor unit.
If there is an error, the level of the error detection line 5 is changed and the sending terminal is notified.

The error detection line is, for example, R5-232 of a packet switching line.
In the case of C interface, the empty bin No. 10 is used; FIG. 2 is a block diagram of an embodiment of the error detection unit in FIG.
is a latch register, 12 is a +1 adder, and 13 is a comparator. In the circuit of FIG. 2, sequence number 10 is latched in latch register 11, and +
1 and the comparator 13 with the updated sequence number.
are input and compared. If the updated sequence number and the pre-update sequence number are equal to +1, the output is zero, but if they are not equal, it is interpreted as a failure and is notified to the transmitting side via the error detection line 5.

〔Effect of the invention〕

As explained in detail above, according to the present invention, when a failure occurs on the transmitting side, the error is immediately notified from the monitor device, making it easier to analyze the error. The effect is enormous. ′

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the line monitoring device according to the present invention, FIG. 21J is a detailed block diagram of the error detection unit in FIG. 1, and FIG. 3 is a block diagram showing information transferred through the line and monitored. Indicates formant. In the drawing, 1 is a monitor unit, 2 is an error detection unit, 3 is a main control unit, 4 is a transmission data/reception data line, 5 is an error detection line, 10 is a sequence number, 11 is a latch register, 12 is a +1 adder , 13 indicate comparators, respectively. Page 1, Figure 2, Qin, page 3

Claims (1)

[Claims] In a line monitoring device that monitors transfer information on a communication line, there is a means for drawing a sequence number added to the information, a means for checking the sequence number to detect an error, and a means for detecting an error on the transmitting side when an error is detected. Alternatively, a line monitoring device characterized by having means for notifying communication terminals on the transmitting and receiving sides.