SU862371A1 - Device for detecting interruption occurence section in communication channels - Google Patents

Description

(54) DEVICE FOR LOCALIZED LAND

RELATIONSHIPS IN COMMUNICATION CHANNELS

I

The invention relates to telecommunications and can be used on long-distance trunk lines in order to localize the site of occurrence of communication interruptions in group and linear paths.

A device for localizing the site of occurrence of interruptions in communication channels is known, which contains in series a connection at the control room. Control receiver frequency and Q indicator and on each controllable item a receiver of the control frequency and indicator, the other input of which is combined with the input of the receiver of the control frequency of the next controlled, 5 DJ points

However, the known device allows the occurrence of errors in the definition. The scientific research institute of the number of the damaged area due to the scatter of the thresholds of triggering jg of the comparators in the presence of de-stabilized factors.

The aim of the invention is to improve localization accuracy.

Claims (2)

To do this, a device for localizing the area of occurrence of interruptions in communication channels, containing at the control room serially connected receiver of the control frequency and indicator and at each controlled point, receiver of the control frequency and indicator, the other input of which is combined with the receiver input of the control frequency of the next controlled point, an additional communication channel was introduced, at each controlled point, a coincidence unit and an acknowledgment receiver, and at the control tower, a transmitter to the handshake signal. At the control station, the transmitter input of the acknowledgment signal is connected to the receiver output of the control frequency, the transmitter output of the acknowledgment signal is connected via an additional communication channel to the input of each receiver of the acknowledgment signal, the output of which is connected to one of 3 inputs of the coincidence unit, the output of which is connected to the input indicator. The other input of the coincidence unit is connected to the output of the receiver of the controlled frequency of the corresponding controlled point. The drawing shows a structural electrical circuit of the proposed device. The device for localization of the section of occurrence of interruptions in communication channels contains at the control room and each controlled point the receiver I of the control frequency, indicator 2, additional channel 3, at each controlled point the block 4 matches, the receiver 5 confirming the signal -signal, controlled path 7, amplifying points 8 of path 7. The device operates as follows. Provided that due to the destabilizing factors, the receiver 1 of the control frequency of the control points has a difference in the threshold of Trigger from A in To and in the receiver of 1 control frequency of the control tower, the trigger threshold is adjusted so that it only triggers from interruptions with an amplitude greater than. A ( We look at two possible cases. In the first case, the amplitude of the break is in the zone of variation of the trigger threshold of the receivers from A (y, c to Amo1x) In this case, the receiver 1 of the control frequency of the control room does not It is because its threshold is set to large A. In this case, the override indicators do not work either at the control room or at the monitoring point. In the second case, when the amplitude of the break exceeds the AtjvLo value A. Receiver 1 of the control frequency at the supervisor point is triggered; Acknowledgment Signal Transmitter 6. The signal of the last transmitted through additional channel 3 causes the receiver 5 to acknowledge the signal of each controlled point. As a result, a signal appears at the input of block 4, connected to the output of receiver 5, and a signal from receiver 1 of the control frequency appears at the other input of block 4, but only at those controlled points that are located behind the break point. . When there are signals at both inputs, the coincidence unit 4 is triggered, and its signal turns on the indicator 2. Thus, in this case, the indicators also indicate the presence of a break at all controlled points, and therefore, the number of the damaged section is determined without error. A device for localizing a section of occurrence of interruptions in communication channels, containing at the dispatch point serially connected receiver of the control frequency n indicator and at each controlled point the receiver of the control frequency and indicator, the other input of which is combined with the receiver input T e and Ch eu e with the fact that, in order to increase the accuracy of localization, an additional channel of communication was introduced, at each controlled point - a unit At the control station, the input of the transmitter of the confirmation signal is connected to the output of the receiver of the control frequency, the output of the transmitter of the acknowledgment signal is connected via an additional communication channel to the input of each receiver of the feedback signal, the output of which connected to one of the inputs of the coincidence unit, the output of which is connected to the indicator input, another input of the coincidence unit is connected to the output of the control receiver often You are the appropriate controlled item. Sources of information taken into account in the examination 1. The author's certificate of the USSR 60A165, cl. H 04 J 1/16, 1978 (prototype). l V 1 Is one 11 | F g Iv one || If Ch f