SU1540022A2 - Device for automatic switching of telegraph communication channels - Google Patents

Abstract

The invention relates to the field of communication, can be used in data transmission systems via telegraph channels. The purpose of the invention is to increase the switching accuracy by increasing the number of cycles of monitoring the state of the telegraph communication channels. The goal is achieved by introducing additional barring elements 19, 20, additional memory block 22 and additional elements 21. When a duplicate main fault is detected during the monitoring, the fault signal from the main control block 3 returns from block 22 to the main block 18 additional channel status. If the duplicate channel monitoring cycle approaches completion, the information from block 22 does not read, this information is erased, and it is prepared to record information on the actual state of the additional channel at the end of the monitoring cycle from the main memory block 18. The device functions more efficiently by periodically monitoring all additional channels while the main channels are in good condition, which allows you to constantly have reliable information on the status of additional channels. 1 il.

Description

The invention relates to communication and can be applied in data transmission systems via telegraph channels of Euro 3 and.

The purpose of the invention is to improve the accuracy of switching by increasing the number of cycles of monitoring the state of telegraph communication channels

The drawing shows a structural-electrical device diagram

The device contains the first switches 1 receivers 2 information, the main blocks 3 control, the second switches 4 5 control receiver 5, additional control block 6, ring register 7E pulse generator 8, element OR 9, additional element OR 10, elements AND and 12 of the ban, the first additional prohibition elements 13, registers 14, elements 15 and 16, shapers 17 pulses, main memory blocks 18, second 19 and third 20 additional prohibition elements, additional elements 21 and additional memory blocks 22,

The device works as follows.

In the initial state, the main communication channels through the first switches 1 are connected to the receivers 2 information. The main control units 3 monitor and generate fault signals of the respective main channels. The duplicating channels are connected to the input of the monitoring receiver 5 through the first 1 and second 4 switches for periodically monitoring the control signal arriving at the first inputs of the second switches 4 and the signal entering the fourth inputs of the second comm0

five

0

five

0

five

0

five

tators 4 when leaving the main channel from the outputs of the prohibition elements 13 and the outputs of the registers 14, and the signals at the output of the prohibition elements 13 are formed using the ring register 7, the additional element OR 10 and the prohibition element 11 based on the signals from the pulse generator 8 with a properly functioning a duplicate channel, the state of which is stored in memory block 18 With a malfunctioning main channel and a valid duplicate channel, a fault signal from the main control unit 3 through prohibition elements 12 in the absence of si The first and third inputs are fed to registers 14, where they are analyzed for a time equal to or longer than the channel recovery time specified by the pulse generator 8 controlling the registers 14. From the registers 14 the signal is fed to the fourth inputs of the second switches 4 and through the OR element 9 and the prohibition element 11 prohibits the operation of the ring register 7 from the pulse generator 8, monitors the connected backup channel and switches the main channel to the backup one.

When an additional channel fails, information about its state is recorded in the corresponding memory blocks 18 and rewritten into additional memory blocks 22, In the absence of signals about the failure of the main channels by a signal from the output of the ring register 7, through the failure information element 19 of the additional canap information from block 18 memory is erased. Through the element 13 of the prohibition by the signal arriving at the per 5

the second input of the second switch 4, connects the corresponding backup channel to the control receiver 5o

When a duplicate channel detects a malfunction of the corresponding main channel, the malfunction signal from the main control unit 3 through the prohibition element 20 and the additional element 21 returns from the additional memory block 22 to the main memory block 18 information about the additional channel. If the monitoring cycle of the backup channel approaches completion, which is determined by the signal at the additional output of register 14, then information is not read from the additional memory block 22, this information is erased and it is prepared for recording at the end of the control cycle from the main memory block 18 the actual state of the additional channel

Claims (1)

The device functions more efficiently, having periodically monitored all additional channels with healthy main channels, which allows one to constantly have reliable information about the state of additional channels. Invention Formula Device for automatic switching of telegraph channels 0226 on avtosv. No. 944140, characterized in that, in order to increase the switching accuracy by increasing the number of monitoring cycles of the telegraph communication channels, it introduces the second additional prohibition elements5 additional memory blocks, additional And elements whose outputs are connected to the main inputs of the respective main memory blocks, the outputs of which are connected to the first inputs of the respective additional blocks the memory, the outputs of which are connected to the first inputs of additional elements And, the corresponding outputs of the ring register are connected to the first inputs of the second additional prohibition elements whose outputs are connected to the additional inputs of the corresponding main memory blocks, the outputs of the corresponding main control blocks are connected to the second inputs of the second additional prohibition elements and the first inputs of the third additional prohibition elements whose outputs are connected to the second inputs of the additional AND elements, and the additional outputs of the corresponding the registers are connected to the second inputs of the third additional prohibition elements and the second input of additional memory blocks