SU557512A1 - Automatic Subscriber Finder - Google Patents

Description

one

This invention relates to radio engineering and can be used in automatic telephony.

A device for automatic subscriber search is known comprising a series-inter-run time unit, a pulse generator, a pulse counter, a memory block, a pulse series counter, a shutdown unit, a dialing repetition unit and a start-up unit whose outputs are connected to the second input of the pulse generator and to the amplifier input, respectively reception, the outputs of which are connected respectively to the second inputs of the launcher, the repeater unit and the shutdown unit lj.

However, the known device does not have sufficient speed.

The purpose of the invention is to increase speed.

To do this, an automatic subscriber locator comprising a series-inter-run time block, a pulse generator, a pulse counter, a memory block, a pulse series counter, a shutdown block, a repeat block and a block

the start, the outputs of which are connected respectively to the second input of the pulse generator and to the input of the amplifier, the reception, the outputs of which are connected respectively to the second inputs of the start block, the repeater dialing block and the switch off block, is inserted into an automatic search control unit consisting of a matching transformer, tone generator, the distributor, inductor call receiver, switching unit and time relay connected to the second input of the receiving amplifier, to the third input of which the switching unit is connected, is connected output inductor with first call receiver, the second output of which is connected via a distributor unit to the memory and the second output of the pulse generator through the tone generator is connected to the matching transformer.

The drawing shows the electrical circuit of the proposed device.

The device contains series-connected inter-series time series, a generator of 2 pulses, a counter of 3 pulses, a block of 4 memory, a counter of 5 series

pulses, a switch-off unit 6, a dialing repeater unit 7 and a start-up unit 8, the outputs of which are connected respectively to the second input of the generator 2 and to the input of the receiving amplifier 9, whose outputs are connected respectively with the second inputs of the block 8, 7 and 6, the auto-control unit Yu, consisting of a matching transformer 11, a tone frequency generator 12, a distributor 13, an inductive call receiver 14, a switching unit 15 and a time relay 16 connected to the second amplifier input 9, to the third input of which is connected a block 15 connected to the output the receiver 14, the second output of which is connected to the unit 4 via the distributor 13, and the second output of the generator 2 through the generator 12 is connected to the matching transformer 11. In addition, the

14 and block 8 are connected by button 17 Auto search to lines 18 and 19, and block

15- to line 19.

The device works as follows.

The numbers by which the subscriber's auto search is performed are programmed in block 4 of the memory using dedicated dedicated buttons. To put the device into autosearch mode, the subscriber presses button 17 Autosearch / AP /, the distributor 13 is activated, line 18 is prepared for transmitting numbers, and receiver 14 is connected to subscriber line 19, switching contacts of the button 17, unit 6 output switches from input unit 7 to the input of the time relay 16.

When you receive a call on line 19

A probe 14 is triggered, from which a command is sent to the distributor 13 to prepare block 4 for transmitting the first number. The receiver 14 with its contacts connects the unit 8 to the line 18 and delivers

a signal to block 15, which, by switching its contacts, connects line 19 to line 18 through a matching transformer 11. In addition, block 15 transmits to amplifier 9 a signal to turn off the amplifier for loud speaking reception.

During the transmission of the number, the generator 2 controls the operation of the generator 12, from which tones with the interruption frequency of the dial pulse are sent to line 19. These signals inform the caller about the autosearch of the called party. After the transfer of the last series of numbers, block 6 issues a signal to the time relay

16 and disables the receiver of the tones of the successor 9c in order to avoid analyzing the signals arriving on line 18.

After a certain time has elapsed, time relay 16 is triggered, which will re-enable the tone receiver in amplifier 9. The tone receiver will monitor the presence of tones, which can occur in two cases: the called subscriber did not answer, after the end of the conversation he disconnected. When these signals appear, the amplifier 9 transmits to block 6 a command to bring the device back to its initial state, except for distributor 13. If the calling subscriber is not satisfied with the connection, he repeats the call. In this case, the receiver 14 transfers the distributor 13 to the next position, ready in block 4 for transmitting the next number, then the device also works as described.

If necessary, the caller will receive as many different connections as the search addresses will be programmed, thereby removing restrictions on the time and scope of movement of the subscriber without significantly increasing the likelihood of incoming calls being lost.

Claims (1)

1. US patent No. 3591727, 178-18, published in 1967. I