SU1314477A2 - Keyboard dial - Google Patents

Abstract

The invention relates to communication technology and provides a reduction in dialing time. The device contains a reversible counter 1, a decoder 2, a keyboard 3, pulse generators 4 and 10, triggers 5 and 9, a coincidence unit 6, a display unit 7, a relay block 8, two additional outputs 11 and 12 of the decoder. Block 7 is turned off when the digit is completed and the next button of keyboard 3 can be pressed. The inter-run time is ensured by the fact that the counter 1 passes zeroes after the zeroing conditions corresponding to the numbers 15, 14, 13, etc. until reaching output 12 (corresponding to figure P). Negate. the trigger 9 is set to one state, enabling operation 10. Counter 1, under the action of these pulses, changes the counting direction and re-polls buttons of keyboard 3 at high speed. 1 il. with (L with N "N)

Description

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The invention relates to communication technology, can be used in the equipment of automatic dialing of telephone and telegraph networks and is an improvement of the basic invention according to the author. St. No. PA9429.

The aim of the invention is to reduce the dialing time.

The drawing shows the structural scheme of the dial pad.

The device contains a reversible counter 1, a decoder 2, a keyboard 3, a first pulse generator 4, a first trigger 5, a coincidence unit 6, a display unit 7, a relay block 8, a second trigger 9, a second pulse generator 10, a first additional output 11 of the decoder, a second additional output 12 decoder.

Tastronovy dialer works as follows.

When the power is turned on, the reversible counter 1 is set to the zero state by the installation signal to 0 (not shown in the diagram). From the first additional output I1 and from the second additional output 12 of the decoder, the first trigger 5 and the second trigger 9 are set respectively to the zero and one states, prohibiting the passage of pulses from the first pulse generator 4 through the coincidence unit 6 to the relay block -8 and into

line display unit 7 is turned off. I

At the end of the original signal, the reversible counter 1 under the action of pulses arriving at the summing input from the second pulse generator 10 successively changes its states, while the output of the decoder 2 sequentially polls the buttons of the keyboard 3. The buttons are polled at high speed.

In each polling period, negative signals from the first and second additional outputs II and 12 of the decoder confirm the state of the first and second triggers 5 and 9.

When one of the buttons of keyboard 3 is pressed, for example, corresponding to digit 3, and when the reversing counter 1 reaches the state corresponding to the dialed digit, a negative signal from the corresponding output of the decoder 2 through keyboard 3 means that the second trigger 9 is set to

4772

zero state. The signal from the direct output of the second trigger 9 prohibits the operation of the second pulse generator 10, and the signal from the inverse output allows the operation of the first pulse generator 4, whose operating parameters correspond to the required frequency of dialing pulses.

At the same time, the first trigger 5 is set to one state, which allows the passage of signals from the first pulse generator 4. Through the coincidence unit 6 to the input of the relay unit 8 and the line includes - with the display unit 7, which signals the passage of dialing pulses.

In a reversible counter under the action of pulses arriving at the calculation

0

five

 the input from the first pulse generator 4, subtracts the dialed code corresponding to the dialed key of keyboard 3. As soon as the reversible counter 1 reaches the current

zero output, negative: the signal from the first additional output 11 of the decoder, the first trigger 5 is reset, which prohibits the pulses from the first pulse generator 4 to pass through the coincidence block 6 to the relay block 8. The last triggers three times, which corresponds to the three pulses taken into the communication line 35.

The display unit 7 is turned off, indicating that the set of this digit has been completed and the next button of the keyboard 3 can be pressed. The inter-run time is ensured by the fact that the reverse counter 1 after zeroing passes the states corresponding to the numbers 15, 14, 13 and so on. until reaching the second complementary output 12 of the decoder (corresponding to 11). The negative signal of the second trigger 9 is set to one, allowing the second generator

0

0

five

pulses 10. A reversible counter 1 under the action of these pulses changes the counting direction and re-polls buttons of keyboard 3 at high speed.

The dialing process is repeated.

Claims (1)

Invention Formula Tastaturny dialer on author. St. № 1149429, distinguished3 13144774 u and so that, in order to shorten which is connected to the output of the dialing time tastatuni, the g inverse output of the second trigger is subsequently connected to the second second connected to the input of the first generator and the second pulse generator, the pulse torus, and the output of the second The second additional output of the decipher- pulse generator is connected to an adder, connected to the installation input of the counter, the alternate of the second trigger, reset the input “reversing”.