RU1831768C - Apparatus for multifrequency signals reception - Google Patents

Abstract

Usage: in the telephone communication technique for automatically receiving signals about the signs of a number transmitted by a multi-frequency code from several line sets of a telephone exchange or automatic telephone exchange. SUMMARY OF THE INVENTION: the device comprises a receiving unit, a multi-frequency signal switch, a digital signal switch, a register block, an output switch, and a control unit. Improving the efficiency of use of the device consists in the fact that one and the same receiver can cyclically serve several linear sets of telephone exchanges or automatic telephone exchanges. 2 ill.

Description

The invention relates to telephone communication technology and can be used to automatically receive signals about the signs of a number transmitted by a multi-frequency code.

The purpose of the invention is to increase the efficiency of using the PBX receiving unit, which consists in the fact that the same unit can cyclically serve several line sets, store information about the received number signs during the polling cycle of the LC group.

In addition, a new mechanism of interaction between the distinguishing features of the solution and the known ones provided a new property for the proposed device; maintenance of four linear sets of automatic telephone exchanges, which leads to the efficient use of a multi-frequency receiver and a decrease in the required number of station multi-frequency receivers.

In FIG. 1 shows a functional diagram of the proposed device.

The device contains a receiving unit. multi-frequency signal switch 2, digital signal switch 3, register block 4, output switch 5 and control unit 6.

The device operates as follows. At the first moment of time, a control signal is supplied from the control unit 6 to the inputs of the multi-frequency signal switch 2 and the digital signal switch 3, by which the multi-frequency signal switch 2 switches the first input to the input of the multi-frequency receiver 1 and at the same time the digital signal switch 3 according to the same control. the signal switches the output of the receiving unit 1 with the first register of the register unit 4. In this case, the multi-frequency signal from the first input through the multi-frequency switch 2 is fed to the input of unit 1,

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where separate tonal signals are extracted, amplified and converted to digital form. The digital signal switch commutes the signal received from the outputs of the receiving unit 1 with the inputs of the first register of the register block 4, the first register of which, like all the others, consists of six memory cells. Information on the frequency fi is transmitted to the first memory cell, frequency f information is transmitted to the second memory cell, frequency f / i to the third cell, f / i to the fourth cell, fs to the fifth, and fe to the sixth. Each register consists of six memory cells, since the reception of a multi-frequency signal implies the presence of 2 of the six tones (fi, f2, fa, U, fs, fe). It is possible to increase the number of received tones with more bits of memory cells.

The signal supplied to the multi-frequency switch 2 and the digital signal switch 3 remains constant for 8 ms; at the end of this time interval, a control pulse is supplied to the first register of the register block 4, which allows recording information about the state of the first entrance.

At the next time, a control signal from block 6 is supplied, by which the multi-frequency signal switch 2 switches the output of the receiving block 1 with the second register block register 4.

In this case, the signal from the 2nd input through the multi-frequency signal switch 2 is fed to the input of the receiving unit 1, where it is filtered, detected and digitally fed to the input of the digital signal switch 3. The digital signal switch 3 commutes the signal received from the output of the receiving unit 1 with the inputs of the second register of the block of registers 4, the second register of which also consists of 6 memory cells.

Inputs 3 and 4 are considered in a similar way. Then, upon receipt of a permission signal for issuing information to the exchange, the output switch 5 switches the outputs of the registers of the register block 4 to the input of the vehicle.

The technical solution to the problem of increasing the efficiency of using a station multi-frequency receiver is provided mainly due to the introduction of a control unit (CU) 6. A timing diagram of the operation of the CU is shown in FIG. 2.

. at time to (see Fig. 2) the address code of the line kit {LK) of the telephone exchange from outputs 1 and 2 of the control unit is supplied to the inputs 5, 6 of the multi-frequency signal switch and to the inputs 7, 8 of the digital signal switch.

This ensures that input 1 is connected.

to the input of the receiving unit, and the outputs of this

the receiver through a switch of digital signals - to the inputs of the first register of the block

registers. In this register, data is received about the received information.

Claims (1)

SUMMARY OF THE INVENTION A device for receiving multi-frequency signals, comprising a receiving unit, a multi-frequency signal switch and a register unit, as well as a control unit, which includes a digital signal switch and an output switch, with four the first inputs of the multi-frequency switch are inputs of the device, and the output is connected to the input of the receiving unit, six outputs of which are connected respectively to six information inputs of the digital signal switch, twenty-four outputs of which are connected to twenty-four information inputs of the output switch, the outputs and control inputs of which are connected to the telephone station, while the first two outputs of the control unit are connected to two second inputs of the switch of multi-frequency signals and to two control inputs of the switch of digital signals, and the second the four outputs of the control unit are connected to the control inputs of the register unit. " 2 5: fo J 4 2 4 25 s LfLf7sl LLL ; Г2JЈГI fe h "§ I I l 5 Xj i with Oj J o CO 6 Ј 5 PG Figure 1 and