SU1297049A1 - Device for checking terminals - Google Patents

Abstract

The invention relates to the field of automation and computer technology and can be used for tapping terminals by controlling the code symbols generated by them, as well as for checking the communication link between telecom adapters. The aim of the invention is to increase the reliability of the controls. The device contains a receive register, a transmit register, an indicating unit, a keyboard. When checking terminals, the encoded pulse sequence from the output of the terminal is written in a serial or parallel code to the receive register. The information at its output is displayed on the display block. The keyboard allows dialing arbitrary code sequences and transmitting them to the device outputs through the transmit register. 5 il. i (L

Description

eleven

The invention relates to automation and computing and can be used to verify the ter- r. the minals by monitoring the code symbols generated by them, as well as for checking the communication links between telecommunication adapters.

The aim of the invention is to increase the reliability of the control.

FIG. 1 shows a functional diagram of the device; in fig. 2 shows the code symbol format generated by the terminal} in FIG. 3 is a diagram of the interface unit to which the device is connected; in fig. 4 - keyboard layout; Fig, 5 is a diagram of the pulse distributor.

The proposed device contains a generator 1, a pulse distributor 2, a first register 3, an indication unit 4, an OR 5 element, a trigger 6, an adapter block 7, a keyboard 8, a counter 9, a second register 10, a parity generator 11. Position 12 denotes the terminal under test, pos, 13 is the test terminal connected to the communication line, pos, 14 is the remote communication adapter, over .1520 is the inputs and outputs of the device, pos,

21- lines of communication.

The interface block (FIG. 3) contains optocouplers 22 and 23, matching elements 24-29, the Keyboard (FIG. 4) contains latching switches 30 and 31, non-latching switch 32 trigger 33, Pulse distributor (FIG. 5) contains the third 34 and fourth 35 counters, trigger 36, first 37 and second 38 elements NOT; When checking a terminal connected to a communication line and operating in sequential I / O mode, the device operates in the mode of control of the passage of code symbols formed by the terminal and the remote adapter communication, and in the mode of contact ol serviceability blocks. receiving terminal and remote communication adapter

. In the first mode, the monitoring is carried out by checking the successive code symbols transmitted by the terminal when the keys of its keyboard are pressed. In the initial state, a current flows in the communication line 21, since the transmission elements of all devices are in the open state (e.g. 7)

970492

When the Start pulse is transmitted, the communication line 21 is de-energized. At this, the second output of block 7 generates a zero potential, which 5 through the OR element 5 is fed to the input of the trigger setup 6 and to the information input of the register 3, Trigger 6 is enabled and enables the distributor 2 pulses, which, synchronously with the frequency of the received information bits of the code symbol, begins to form control cycles for writing information to the register 3 and to count the received information bits in one code symbol.

After writing to the register of the third decimal bit, t, e, of the first stop pulse (Fig. 2), pulse distributor 2 generates a pulse arriving at the reset input of trigger 6, which switches and sets the pulse distributor .2 to its initial state. In this case, the formation of clock pulses for register 3 is stopped. In block 4 of the display, the code symbol recorded in register 3 is displayed, and the display is saved until the next code is received.

15

20

25

thirty

character.

The correctness of the code symbol recorded in register 3 and its elements is fixed by the operator, in

,, block health monitoring mode

receiving a terminal and a remote communication adapter or only one of them, a certain code symbol is set using the switches 30 of the keyboard 8. Shaper 11 bits of parity on the basis of the input information generates bits of parity. By pressing the keypad switch 32 (recording) 8, the character of the record 4 enters the transfer register 10. At. releasing the switch 32, the code symbol with the frequency of the control clock, formed by the counter 9, from the register register 10 is fed to the input

Q block 7. The optocoupler 23 of the block, under the influence of an incoming code symbol, when opened or closed, transmits the code symbol to the communication line 21. At the same time, the same symbol arrives

„To exit 16 of the device.

In this case, the code symbol generated in the device is received by the verifiable terminal, and the reception of the transmitted code symbol in

Register 3 is necessary to monitor the health of link 21 (in the event of a line break, the code in reception register 3 is not recorded).

In the case of the off state of the switch 31 (repeat) one click - releasing the button 32 Recording the keyboard causes a single code symbol to be transmitted. When the switch 31 is turned on by the register 10, the code symbol is permanently written to the same register, while the keyboard character is transmitted inevitably

In addition, for monitoring the correct operation of the terminal and the remote communication adapter, it is possible to control the quality of the formation of code symbols: Catch, without disturbing the normal operating mode between these devices, in any place including the cut line 21 between them.

When checking the terminal, on the outputs of which code symbols are formed in a parallel code, the code symbols are fed to the device inputs 17 and written to the register 3 with a gating pulse accompanying each code character and arriving at the device input 18.

The code symbol recorded in register 3 is displayed by display unit 4.

When checking the terminal in the serial I / O mode, the terminal code formed by the terminal is fed to the input 15 of the device. Further operation of the device is similar to the one described above.

The control sequence, formed using the keyboard 8, is fed to the input of the receiver terminal from the output 16 of the device.

Claims (1)

Invention Formula A terminal monitoring device comprising a generator, a pulse distributor, a first register, an indicating unit and an OR element, the output of the generator is connected to a pulse input of a pulse distributor, the outputs of the first register are connected to the inputs of an indicating unit, in order to increase the reliability of control, A keyboard, a counter, a second register, a parity bit generator, a trigger, the inputs of the OR element are the first and second inputs of the device, and the output is connected to the information input of the serial the first register and the trigger input, the parallel register's first write synchronization is the third device input, the first register's information inputs are the device input group, the first pulse distributor output is connected to the first register's synchronous input, the second pulse distributor output is connected to the input reset the trigger, the output of which is connected to the reset input of the pulse distributor, the counting input of the counter is connected to the output of the gedertor, the output from the meter is connected to the serial write input of the second register, the output of which is connected to the keyboard input and is the device output, the first keyboard key is connected to the information input of the second write serial record, the second keyboard output is connected to the counter reset input, the parallel recording input of the second register, group of outputs the keyboard and the output of the parity bit are connected to the information inputs of the second register, the inputs of the parity bit are connected to the group of outputs of the key urs. 1 Start Inrormotsi etn. Stop one tJj.jLll.l .. fig.g 19i Lgo . 2S 2S ten Fig.z J / P 10 j4ZZ} -g + K-chIy + :: Compiled by A.Tounov Editor L.Povkhan Tekhred M.Hodanich Proofreader T.Kolb Order 782/52 Circulation 673 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 f (/. FIG. five