SU409394A1 - DEVICE FOR VERIFICATION OF TRACK OF COMMUNICATION SYSTEM WITH PULSE CODE MODULATION - Google Patents

Description

one

The invention relates to the field of telecommunications and molset is used, in particular, in any communication system with a temporary seal.

A device for automatic verification of PCM encoders is known, which contains a sensor of test signals consisting of a binary generator, a word generator, a linear generator, an analyzing device consisting of a comparator and an error counter, an indicator device.

The principle of operation is based on the comparison of test signals, simpler through a coder with a sequence of signals produced by a sensor of code combinations. The result of the comparison from the error counter goes to the fault indicator.

However, using such a device it is impossible to carry out a thorough verification of the entire PCM path from the center to a remote station OR to subscribers.

The aim of the invention is to detect faults in individual paths of the communication system.

This is achieved by introducing into the proposed device a memory register, a time channel identification circuit, a subsequent coitrol circuit, a cycle counter, as well as communication circuits between them, which are implemented as follows. The inputs of the memory register and

identification circuits are connected to external devices of the communication system, the output of the register is connected to other inputs of the identification circuits, the outputs of the identification circuits are connected to the sensor inputs of the test signals and the analyzing device, respectively. Another input of the analyzing device is connected to the path. The output of the sensor is connected to the controlled cial, and the output of the analyzing device is connected to the inputs of the nodes generating the signals "Health and Fault".

To the second input of the signal shaping node, the "Fault" is connected to the output of the CYCLES counter, whose input is connected to the output of one of the time channel identification circuits.

Pa of the drawing shows a block diagram of the proposed PCM path checking device.

The device consists of a register / memory storing a sign of a temporary channel to be monitored; identification schemes 2 and 5 that select a controlled time channel from all channels provided to network subscribers; sensor 4 test signals, issuing test signals to the monitored channel; analyzing node 5 analyzing the test information coming from the monitored channel; key circuit 6, which determines the time of the test signals from the sensor; key scheme 7 defining the beginning of the analysis; Signal formation unit 8 "Connection failure with a negative result of control; Signal generation unit 9" Connection operability and a positive control result; counter 10 cycles, performing counting cycles, characterizing the number of times the provision of a controlled time channel for analysis.

The device works as follows.

When a connection is established in a register / memory from a control system device, in particular from an electronic computer, an indication of a temporary channel used in the connection and being monitored is recorded in a binary code.

A binary signal from the register / memory is fed to one input of the identification circuit 2, to the second input - binary signals containing time channel codes. The sequence of binary signals varies depending on which time channel is currently provided for transmission. When the binary signals arriving at both inputs of the identification circuit 2 coincide, the signal from it sets the key circuit 6 to a state in which the clock frequency, acting on the sensor 4 of the test signals, generates test signals arriving at this monitored time channel.

The issuance of a series of test signals to a monitored channel ceases when 6 sets of the “Installation.

The test signals from the monitored channel are sent to the analyzing node 5. The identification circuit 3 determines the time of provision for receiving the monitored time channel and, using key circuit 7, gives permission to perform the analysis.

At the same time, the counter runs 10 cycles. Analyzing node 5 determines the number of downed binary signals in the test pattern. When the number of failures is exceeded by some predetermined norm, the unit 8 of the formation generates a signal "Fault. Under the condition that the number of failures is within the acceptable range, the formation unit 9 generates a “Operability. The signals "Health and Fault" are transmitted to external devices of the communication system for further processing and decision making.

The "Fault" signal is also generated if, during a predetermined number of time cycles, the test signals do not arrive at the input of the node 5, analyzable, ero.

When obtaining an estimate of the state of connection, signals from nodes S and 9 of the formation set to the initial state the register / memory and counter of 10 cycles.

Subject invention

A device for checking the path of a communication system with pulse-code modulation, containing a sensor of test signals, connected to an analyzing node via a controlled communication channel, characterized in that, in order to detect faults in individual paths of a communication system, a register is additionally entered into the device and these, identification schemes of the monitored time channel, signal forming and non-imbalance signal generation units and a cycle counter, while the memory register receives signals with a sign of the monitored The outputs of the memory register are connected to one of the inputs of the identification of the monitored temporary channel, the outputs of which are connected via the key circuits respectively to the inputs of the sensor of the test signals and the analyzing node, the outputs of the latter are connected respectively to the inputs of the correctability and malfunction signals, and to the second to the input of the signal generation unit, the malfunction is connected to the output of the cycle counter connected to the second circuit of recognizing the monitored time channel, the first ode signal generating units and serviceability neispravposti connected to inputs "reset cycle counter connected simultaneously to the other inputs of the register memory, and the third input" reset cycle counter coupled to the third swing BL analyzing unit. Taktova t acmo / na I d - In the path From the path I To the system -J LoZleni L