SU902311A2 - Device for automatic searching of subscribers - Google Patents

Description

(54) DEVICE AUTOMATIC SEARCH FOR SUBSCRIBERS

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The invention relates to radio engineering and can be used in automatic telephony to build subscriber telephone devices of switching centers.

According to the main author. St. No. 557512, a device for automatic subscriber subscriber unit containing a series of inter-serial time blocks, a pulse generator, a pulse counter, a memory block, a pulse series counter, a shutdown block, a repeater dial, a start block, the outputs of which are connected to the second input, is known. pulse generator and to the input of the receiving amplifier, the outputs of which are connected respectively to the second inputs of the start-up unit, the repetition unit, and the dial-up and shutdown unit, the autosearch control unit connected to the second inputs of the receiving amplifier and the memory unit, as well as with the second output of the pulse generator, with the first subscriber line directly and with the second

subscriber line through the contacts of the button. Autosearch in the working position, second subscriber line through normally closed contacts Autosearch is connected to the launcher Sch.

However, the known device has a long subscriber search time.

The purpose of the invention is to reduce the search time for subscribers.

This goal is achieved by introducing into the known automatic subscriber unit a ten-day test block and a serially connected read priority distributor, a random access memory block and an address decoder, the sequentially connected read priority distributor, the random memory block and the address decoder between the auto search control block. and a memory unit, with the first, second and third outputs of the block of the ten-day tester being connected respectively to the pilot inputs p queue allocator. readout

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memory block and address decoder.

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

Automatic search device. subscriber block contains 1 decade theotatura, readout allocator 2, RAM block 3, inter-series time block 4, 5 pulse generators, 6 pulse pulses counter, memory block .7, pulse series counter 8, shutdown block 9, repeat dialing block 10 , a startup unit 11 with contacts 12, a search control control unit 13, an Auto search button 14, a reception amplifier 15, first and second subscriber lines 16 and 17, respectively, an address decoder 18.

The device works as follows.

The pre-programming of the numbers for their subsequent automatic dialing is not carried out manually using the installation cross, but by block 1 of the ten-day test system, which dials the subscriber’s number, this number is recorded in memory block 3, then read through address decoder 18 into memory block 7 Also, the address is assigned by block 1.

The numbers by which the subscriber is automatically searched are selected from the memory block by writing their addresses in the RAM, the read priority distributor 2 at the same time records the number of addresses to search. To transfer the device to the autopoy mode, the subscriber presses the button 14. Next, the device operates similarly to the prototype with the only

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the difference that the information on the addresses of the numbers to be searched for is not contained in the pressed address buttons, but in block 3 of the operational memory. Sequential reading of these addresses is carried out according to the signals of the auto-search control unit 13 through the reading priority distributor 2.

Thus, the introduction of new elements in the proposed device is essential. but expands its capabilities, ultimately leading to an increase in telephone speed.

Claims (1)

1. USSR author's certificate number 557512, cl. H 04 M 3/58, 10.06.75 (prototype).