SU1658409A1 - Device for telecode data transfer from punched tape - Google Patents

Abstract

The invention relates to telegraphy. The purpose of the invention is to increase the speed and accuracy of information transfer. The device contains a transmitter 1. reperformer 2, transmitting memory block 3, operating mode selection unit 4, transceiver 5, master oscillator 6. The purpose of the invention is achieved by the introduction of a receiving memory block 7, an error protection block 8 and a signal conversion unit 9. This makes it possible to increase the transmission rate of telecode information by no less than two times and increase the fidelity of transmitting code information to the body by no less than 5.5 times due to the majority method and parity. 2 hp ff, 3 ill.

Description

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The invention relates to telegraphy and can be used b networks of telegraph and telephone communications.

The purpose of the invention is to increase the speed and accuracy of information transfer.

FIG. 1 shows the structural electrical circuit of the proposed device; in fig. 2 is a structural electrical circuit for error protection block; in fig. 3 is a structural electrical circuit of a signal conversion unit.

A device for transmitting telecode information from punched tape contains a transformer 1. reperformer 2, transmitting memory block 3, operating mode selection unit 4, transceiver 5. master oscillator 6, receiving memory block 7, error protection block 8 and conversion unit 9 signal.

The error protection block contains a reception accumulator 10, a reception distributor 11, a decoder 12, a reception distributor 13, a transmission drive 14, a decision node 15, and an OR 16 element.

The signal conversion unit comprises a model 17, a vocoder 18 and a matching node 19.

The device works as follows.

Depending on the type of the connected channel (telephone, telegraph or digital), controls (not shown) of the signal conversion unit 9 are set by the operator to the appropriate position. In this case, a telephone set (not shown) connected to the signal conversion unit 9 is used for service communication over switched telephone and digital channels.

After resetting the punched tape in transmitter 1, the operator records the telecode information contained on the punched tape in block 3 of the memory of the device. In this case, the transmitter 1 is started at the corresponding signal taken from the output of the mode selection unit 4, the information from the punched tape is read and written to the memory unit 3. After reading the last character, transmitter 1 is automatically turned off. Consistent operation of all units of the device is provided by the clock pulse sequences generated by master oscillator 6.

After establishing a service connection with the subscriber and obtaining agreement on the reception of telecode information, the operator switches the device to the mode of transmission (reception) of information. Depending on the quality of the communication channel, the device can use the mode of information transfer with increased reliability, or the mode of information transfer without increase of reliability.

In the first case, the telecode information from the output of the memory block 3 is successively fed to the error protection block 8. The 32-bit-formed information blocks are fed to the input of the transceiver 5, in which one parity check bit is added to each information mark, and at the end of each block, a series of 3 characters is formed that define the end of the block.

From the output of the transceiver 5, the information signals in the sequential start-stop code arrive at the input of the signal conversion unit 9.

In order to match the information signals with the channel used, block 9 converts the signals by level, code and modulation type, etc. After that, information signals are sent to the communication channel.

When receiving telecode information, the signal conversion unit 9 performs inverse transformations and, from its output, the information signals in the serial start-stop code arrive at the input of the transceiver 5. In the transceiver 5, signals of the serial start-stop code are converted into signals of the parallel code and each information symbol is bit-tested on parity. Next, the information signals arrive at the error protection block 8, in which blocks of 32 characters are formed from the incoming information. Each three information blocks are compared to each other by a majority method and a result block is formed. After that, the information of the resulting block of 32 characters enters memory block 7. From the output of memory block 7, the information is sequentially read into reperformer 2, which registers the incoming information on punched tape.

If there are more errors in the received information, the error protection unit 8 generates a corresponding alarm signal, which is transmitted to the transmission side via the communication channel. In this case, both on the transmitting and on the receiving side, an alarm is activated, indicating that the transmission process of the telecode information is incomplete. The transmission of telecode information can also be interrupted by t no at the initiative of the receiving or transmitting side operator by applying the appropriate signal from the mode selection unit 4 to the error protection block 8.

After bringing the elements of the device back to the initial state, the process of transmitting the telecode information is resumed at the request of the operator.

In the information transfer mode without reliability enhancement, information signals on the device blocks are passed in the same way, except that in the error protection block 8, the formed blocks of 32 characters do not repeat three times. At the same time, on the receiving side, each incoming information block is considered as the resulting one and from the output of the error protection block 8 through the memory block 7 enters the input of the reperforator 2. Errors in the received telecode information are detected visually by the operator on signs recorded on a punched tape. The transfer process is interrupted manually by the operator, as described above.

Unit 8 protection against errors works as follows

Clock pulses from master oscillator 6 enter distributors 13 and 11 and decisive node 15. From the output of mode selector 4 to distributor 13, decisive node 15 and decoder 12 receive a corresponding signal that determines the mode of transmitting (receiving) telecode information with increasing confidence or without increasing credibility. The same signal begins to read information from memory block 3.

The information from the memory unit 3 enters the distributor 13, which, by controlling the signals from the output of the transceiver 5, generates information blocks of 32 characters each. From the output of the distributor 13 information signals are received in the drive 14.

If the device is in the mode of information transmission without increasing reliability, then from the output of the accumulator 14 the information signals are fed to the input of the transceiver 5 and further to the communication channel. Otherwise, i.e. when the device is in the mode of transmitting information with increased reliability, after reading from the memory block 3 of the information block into 32 characters, the distributor 13 prohibits the passage of control signals from the transceiver 5 to the memory block 3 and switches the drive 14 to the repeat mode of information. In this case, the reading of information in memory block 3 is stopped, in information from the outputs of accumulator 14, except for transceiver 5, is fed through distributor 13 to input of accumulator 14. After three single information blocks are repeated, distributor 13 is again transferred to information readout mode from memory block 3 The process is repeated.

When receiving telecode information, information signals from the output of the transmitter 5 are fed to the decoder 12 and then either through the distributor 11 to the accumulator 10, or to the input of the element OR 16. When the information block is received in 32 characters in a mode of increasing confidence, information of each repetition is accumulated in drive 10 (separate register). After that, from the output of the accumulator 10, information about three repetitions of one block enters the input of the decision node 15.

0 Simultaneously from another output, the accumulator 10 sends a signal to the distributor 11, which signals that the device is in the generation mode of the resulting information block. Wherein

5, the first repetition of the next information block is accumulated in the storage 10 in the backup register. In decision node 15, the received information is compared by a majority method. After

For this, the information of the resulting block from the output of the decision node 15 goes through the OR 16 element to the block 7 of the memory.

If there are more errors in the result block

5 permissible, in the decision node 15 the alarm is automatically activated. The corresponding signal from its output enters the accumulator 14, which is disconnected from the output of the distributor 13 and transmits to the side of the transceiver 5 a series of information signals corresponding to the alarm signal.

On the transmitter side, an alarm signal is allocated in the decoder 12. In

As a result of this, the signal from the output of the decoder 12 turns on an alarm system (not shown) in the decision node 15. After that, the drive 14 similarly begins to duplicate the alarm

0 signal that enters the communication channel.

When receiving information in the mode without increasing the reliability, the decision node 15, the distributor 11 and the accumulator 10 do not participate in the work. At the same time, the signals of each information block of 22 characters from the output of the decoder 12 are fed through the OR 16 element directly to the input of the memory block 7.

If the operator detects errors in the received information or for any reason, the transmission (reception) of the telecode information can be interrupted by the operator. At the same time, the corresponding signal, taken from the output of the mode selection circuit, switches on the signaling system in the decision node 15. Alarms on the communication channel are received as described above. In order to resume the process of transmitting (receiving) telecode information, the operators of the mode selection unit 4 bring their devices to the initial state (the corresponding circuit is not shown in the drawing).

The signal conversion unit 9 operates as follows.

Service communication over the telephone channel and the digital channel is carried out by means of a telephone set. At the same time, the telephone set is connected to the telephone channel directly via matching node 19. And to the digital channel via matching node 19 and vocoder 18. Telecommunication link is provided by means of transmission of alarm signals by operators as described above.

In the case of telecode information transmission, the matching node 19 of the corresponding signal taken from the output of the mode selector 4, disconnects the telephone from the communication channel and connects the output of the transceiver 5 to it. In this case, the signals from the output of the transceiver 5 go through the matching node 19 to the telegraph channel connection. In matching node 19, the telegraph signals are level converted. If the transmission of telecode information is carried out over a telephone channel, the information signals in modem 17 are converted into modulated signals and then come to the communication channel. When transmitting telecode information over a digital communication channel, the code of the information signals in the matching node 19 is converted into the code of signals used in the digital communication channel. When receiving telecode information, the operations mentioned above for converting information signals are performed in block 9 of the signal conversion in the reverse order.

Claims (2)

1. A device for transmitting telecode information from punched tapes, containing a master oscillator, the output of which is connected to the first input of the reperformer, to the first input of the transmitter, to the first input of the transceiver, and to the first input of the transmitting memory unit, the second input of which is connected to the output of the transmitter. which is connected to the first output of the mode selector, the second output of which is connected to the second input of the transceiver, characterized in that, in order to increase speeds and fidelity of information transfer, a receiving memory block, an error protection block and a signal conversion unit, the first input of which is connected to the third input of the transceiver, the first output of which is connected to the first input of the error protection block, the second input of which is connected to the third output the operating mode selection unit and the first input of the signal conversion unit, the second input 5 of which is connected to the second output of the transceiver, the fourth input of which is connected to the first output of the error protection block, the third input of which is connected to the output of the master oscillator and to the first 0 to the input of the memory receiving block, the output of which is connected to the second input of the reperformer, the output of which is connected to the second input of the receiving memory block, the third input of which is connected to the second output of the block 5 error protection, the third output of which is connected to the third input of the transmitting memory block, the output of which is connected to the fourth input of the error protection block, while the second output of the signal converter block is the signal output of the device, the first and second signal inputs of which are the third and fourth inputs of the signal conversion unit respectively. five 2. The device according to claim 1, that is, so that the error protection block comprises a transfer distributor, a reception distributor, a decoder, a transmission drive, a reception drive, an OR element 0 and the decision node, the first output of which is connected to the first input of the transmission accumulator, the first output of which is connected to the first input of the transmission distributor, the second input of which is connected to the first 5 with the input of the receive distributor and with the first input of the decision node, the second output of which is connected to the first input of the OR element, the second input of which is connected to the first output of the decoder, the second output of which is connected to the second input of the decision node, the third input of which is connected to the first output receive drive, the second output of which is connected to the second input of the receive distributor, 5 whose third input is connected to the third input of the decoder, the first input of which is connected to the fourth input of the decision node, the output of the receive distributor is connected to the input of the receive accumulator, the first output of the transfer distributor is connected to the second input of the transmission accumulator, the second output of which is the first output of the error protection block, the second and third outputs of which are respectively the output of the OR element and the second output of the transmission distributor, the third input of which is the fourth input of the error protection block, the first input of which is The second input of the decoder and the fourth input of the transmission distributor, the second input of which is the third input of the error protection block, the second input of which is the first input of the decoder and the fifth input of the distributor transmission divider. 0 3 Device pop. 1, characterized in that the signal converting unit comprises a modem vocoder and a matching node, the first output of which is connected to the modem input, the output of which is connected to the first input of the matching node, the second output of which is connected to the input of the vocoder, which output is connected to the second input of the matching node, the third, fourth, fifth and sixth inputs of which are respectively the first, second, third and fourth inputs of the signal conversion unit, the first and second outputs of which are the third and fourth output respectively odes matching node. FIG. 2