SU720829A1 - Customer calling device - Google Patents

Description

(54) DEVICE FOR CALLING SUBSCRIBERS

the OR element with the first input of the clock pulse generator, the output of the information processing time metering unit are connected to the input of the starting block and to the second Tyone input | Torah of a tactical module which is connected to the input of an information processing time metering unit, the other inputs of which are connected to additional outlets of switching elements.

The drawing shows the structural electrical circuit of the proposed device.

The device circuit comprises a clock pulse generator 1, an information processing time accounting unit 2, a starting block 3, interrogation nodes 4 consisting of triggers 5, elements 6, 7, sensors 8, switching elements 9, as well as address register 10, a decoder 11 , element OR 15.

The device works as follows.

For any given program, the input of register 10 receives an array of codes for the numbers of those subscribers from whom it is necessary to obtain information. These codes are decrypted by the decoder 11 and set the corresponding triggers 5 to one state. The decoder 11 is made so

 4W lii {) W inf6i2ta4e 01predygenShk -Kyda can trigger all the triggers 5 at once. At the moment the information subscribers start calling, the starting block 3 generates a search impulse, which enters the input of the And 6, 7 elements. if trigger 5 was set to one. At the same time, the output impulse of the AND 6 element switches on the switching element 9 (of the trigger type), which gives permission for the passage of information from the subscriber via the information bus 13, turns off the trigger 5 to the zero state and Through the OR element 12 it goes to the control input of the generator 1, the output the signals of which trigger block 2, which is time out; allotted for communication with the subscriber, since it is controlled from the switching element 9. After the time allotted for communication with the subscriber, the pulse from block 2 that turns off the generator 1 resets at EX1 Ommutatsybynyh elements 9 and fed to trigger unit 3 rd formiruyup new scan pulse. Te p'T Sh15ZhS -Y0 yy e 1yg vykhed Momyonta 7, since the trigger 5 was previously reset, and enters the inputs of the elements And 6, 7 of the next survey node. Further work happens in a similar way. After polling the last information subscriber starting block 3

generates another search pulse, which immediately passes to the output of element 7. This pulse is the signal that the device has finished working in a given communication session, it is a signal of readiness for the use of a new array of codes for selective storing with subscribers.

D-triggers can be used as triggers 5, which completely simplifies the circuit for resetting them.

The device will allow a significant reduction in the number of equipment and simplify the scheme, thereby increasing its reliability.

Claims (1)

1. USSR author's certificate No. 530479, cl. H 04 Q 9/14, 1974 (prototype).