JPS59132254A - System for masking failure due to effect - Google Patents

Abstract

PURPOSE:To eliminate alarm due to a failure caused by effect by providing one more circuit failure detecting circuit and raising alarm only when any of them detects a failure. CONSTITUTION:An effect mask gate 5 is added. Receiving signals B, C are inputted to receiving alarm detectors 2, 4, they are compared with a reference value, and when the signals are lower than the reference value, alarms D, E are raised respectively. When alarms D, E are inputted to the effect mask gate 5, since they are simultaneous alarms, the alarm discriminates that the receiving signal A is failed already, and no alarm output F is outputted. When any of the alarms D, E is failed, the effect mask gate 5 judges that any of receiving amplifiers 1, 3 and alarm detectors 2, 4 is failed and raises an alarm output F.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technical Field of the Invention The present invention relates to failure alarm detection in communication equipment, particularly in failure alarms that do not distinguish between cause failures and effect failures.
This method masks the effect failure and detects a failure alarm only when the cause failure occurs.

(2) Prior art and problems Any communication equipment can have ■transmission function, ■reception function,■
It also has one of the power supply functions.

Among the failure alarms output from conventional communication equipment, transmission failures and power supply failures are alarms that can be determined to be immediate cause failures.

On the other hand, an alarm for the reception function is either a cause failure or an influence failure (propagation path failure, transmission failure of the opposite equipment, or reception function failure of the upper system equipment), and the alarm is issued and an investigation is carried out. The disadvantage is that the 5 equipment was not a failure but had an impact failure.

(3) Purpose of the Invention The purpose of the present invention is to eliminate alarms caused by influential failures.

(4) Structure of the Invention The present invention provides a circuit failure detection circuit in the conventional failure detection circuit, and takes advantage of the fact that there is a low probability that both detection circuits will stop simultaneously. If an alarm is issued, it is determined that it is an influential failure and that alarm is masked, and if only one alarm is issued, this is better than outputting an alarm as a causal failure.

(5) Embodiment of the Invention The signal is amplified and becomes the received +S signals B and C. The received signals ■ and 0 are input to the reception alarm detection units 2 and 4, and are compared with the reference value.

If the value falls below the standard value, alarm 0. [F] is output. The alarm 0° [F] is input to the influence mask gate 5, and since it is a simultaneous alarm, it is determined that the received signal ■ has already been a fault, and the alarm output [F] is not output.

If either of the alarms O1 [F] is abnormal, the influence mask gate 5 considers either the receiving AMPI 3 or the receiving alarm detection 2 or 4 of the equipment to be a failure and outputs it as a failure alarm to the alarm output [F]. .

(6) Effects of the Invention According to the present invention, since it is possible to detect a failure alarm and remove an influential failure, a supervisor does not have to make a wrong judgment, and a system for monitoring communication equipment. In this case, only the cause fault f is sent (if it is sent, the number becomes seven), which has the effect of reducing the load and eliminating the need for complicated fault f'lJ constant logic.

[Brief explanation of drawings]

1.3 is the reception left hand, 2.4 is reception alarm detection,
5 is an affected fault mask section. (2) is the received signal, (2) and O are the amplified received signals, (2) and (2) are the alarm outputs, and [F] is the way the alarm is output after the fault masking.

Claims (1)

[Claims] The received signal is split into two, the first. The second receiving circuit receives the M1. The outputs of the second receiving circuit are respectively connected to the first and second receiving circuits. An influence failure masking method in which the second abnormality detection circuit is manually operated and an alarm is output only when either one of the first and second abnormality detection circuits detects an abnormality.