RU2009618C1 - Device for controlling digital phone set - Google Patents

Abstract

FIELD: electric communication. SUBSTANCE: device has handset lever position signal former 1, the first, the second and the third input bars 2, 16, 17, information signal selector 3, sync pulse selector 4, the first and the second information input bars 5, 15, transmittance information signal former 6, the first, the second output bars 7, 18, dial input signal former 8, dial input bars 9, dial output signals former 10, dial output bars 11, signal selector 12, unit 13 for uniting signals, counter 14, the first, the second and the third control output bars 19, 20 and 21, descrambler 22, scrambler 23, activity permittance signal former 24, inhibition interval former 25 after the handset is put on levers, duty mode signal former 26, permittance interval former 27, digital phone set members power turning-on signal former 28, activity signal former 29. EFFECT: reduced error when digital phone set is under control. 1 dwg

Description

 The invention relates to techniques for electrical communication, in particular, to devices for controlling a digital telephone, and can find application in digital telephones installed on a digital telephone network, in which information is transmitted to the telephone (and comes from it) in digital form.

 The aim of the invention is to reduce the error of the result of control of a digital telephone.

 The drawing shows a structural diagram of a device for controlling a digital telephone.

 The device for controlling the digital telephone contains the driver 1 of the lever position signal of the handset, the first input control bus 2, the selector 3 of the information signal, the selector 4 of the clock pulse, the first input bus 5 of the information, the driver 6 of the information transmission signal, the first output bus 7 of the information, the driver 8 dialer input signals, 9 dialer input buses, 10 dialer output signals, 11 dialer output buses, 12 signal selector, b lock 13 for combining signals, counter 14, second input information bus 15, second and third input control buses 16 and 17, second output information bus 18, first, second and third output bus 19, 20, 21 control, descrambler 22, scrambler 23, shaper 24 of the enable signal of activity, shaper 25 of the prohibition interval after laying the handset, shaper 26 of the signal standby mode, shaper 27 of the resolution interval, shaper 28 of the power-on signal of the elements of the digital telephone, and 29 Spruce activity signal.

 The operation of the device is as follows.

 The device for controlling the CTA has two operating modes: standby and active. As of the first input control bus, the required mode is set.

 If there is a logic level 2 on the input control bus 2, the signal conditioner of the put handset 25 at the outputs has a log level. "1", if there is a log "0" on the bus 2 - a log. "0".

The first information bus 5 receives a continuous sequence of pulses with PWM modulation with frequency F _o , duration τ _o - corresponding log "0" and τ ₁ = 2τ ₀ corresponding - log. 1 the duration between the trailing edges is constant and equal to T _o = 1 / F _o
In addition, in this stream between pulses there is a synchronization pulse with a frequency F _c = 1/8 · F _o , duration τ ₀ or τ ₁ , the position of the relative previous information pulse t = T _o / 2.

The information sequence of pulses is fed to the selector of the information signal 3, which transmits only pulses with a frequency Г _o , and converts the pulses of PWM modulation into AM modulation. From the output of the selector 3 to the elements of the CTA control unit, a PM with F _o and an information signal delayed for a period To are received. The signal selector analyzes the standby signal control unit: call - information pulses on the input bus 5 of duration τ ₁ and the test signal - 1001 on the input bus 5. If there is an output signal from the output of the selector 12, the pulses pass to the first output bus 19. When the presence of the signal "test" from the output of the selector 12 log. "1" goes to block 13 for transmission in the direction of the EATL.

 If the CTA control unit is in active mode, then the signal analysis selector 12 does not produce.

 In the active mode, the information signal from the selector of the information signal 3 is supplied to the descrambler 22, in which the signal is converted statistically, inverse to scrambling. From the output of the descrambler 22, the signal is supplied to the second output bus information 18.

 In standby and active modes from the incoming pulse sequence is selected on the selector 4 clock, coming from the output of the selector 4 to the output control bus 30.

In active mode, the control unit performs the following functions:
formation of the code sequence of the number of the pressed button for transmission to the automatic telephone exchange;
generating a power-on signal for a CTA element;
generation of a subscriber activity signal for transmission to a telephone exchange;
formation of information signals (speech) for transmission to the AATS.

 In active mode, shaper 1 receives the log level. "0", which allows the operation of the shaper 26 and through it the counter 14. From the counter 14, the pulse sequences generated from the PM selector IC 3 are supplied to the shaper 8, from which four input buses 9 enter the keypad of the dialer. When a button is pressed on the keyboard, one of the sequences is switched to one of the output buses 11. Next, this sequence is transmitted to the driver 10. From the output of the driver 10, the code sequence of the number of the pressed button is sent to the signal combining unit for transmission 13. And also, the signal from the driver 10 the prohibition of the operation of the driver 24, and the signal to the operation of the driver 28.

From the counter, a sequence of pulses with a frequency of F _o / 2 is supplied to the shaper 29. From the output of the shaper 29, the subscriber activity signal is transmitted to block 13 for transmission.

Information signals are transmitted to the EATL via the second information bus 15, they are signals with AM modulation, duration T _o. These signals are fed to a scrambler 23, in which the signal is statically converted. From the output of the scrambler 23 information scrambled signal is fed to the block Association 13.

 From block 13, one of the incoming signals through the shaper 6 is fed to the first output bus 7.

 When switching from the active mode of operation to the standby mode of the CTA control unit, the signal from the shaper 1 is fed to the shaper 25, which for a certain period of time prohibits the reception and transmission of the control unit. During the ban, the EATL determines that the subscriber is in standby mode and disconnects the subscribers.

 On the third bus control level 17 log. "1" a forced command to activate the subscriber activity signal is possible. (56) Montemurro R. et de Criter realijjatni di un apparecehio telefonico numerico. - "Note. Recesioni, notijie." 1978, v. 27, N 3, p. 433-466.

Claims (1)

 DEVICE FOR CONTROL OF A DIGITAL TELEPHONE APPARATUS, containing a driver of the position signal of the handset (FSPMT), the control input of which is connected to the first input control bus, a clock selector and an information signal selector, the inputs of which are connected to each other and connected to the first input information bus, selector the dialer of the input signals of the dialer (FVSN) and the shaper of the output signals of the dialer (FVychSN), connected by inputs and outputs, respectively, with the output data and input buses, a signal combining unit and a transmit information signal shaper (FISP), the output of which is connected to the first output information bus, as well as a second input information bus, a second and third input control bus, a second output information bus, and a first, second, third and a fourth control bus output, wherein the first signal output of the FHyCH is connected to the first input of the signal combining unit, characterized in that, in order to reduce the error of the digital telephone control result By means of the second device, it is equipped with sequentially connected resolution interval shaper, standby signal shaper, prohibition interval counter and shaper after laying the handset, as well as power-on signal shaper (FSWP), activity signal shaper (FSA), activity resolution signal shaper (FSRA ), a scrambler and descrambler, the control inputs of which are interconnected and connected to the second input control bus, and the information input of the scrambler is connected to the second the input information bus, the information input of the descrambler is connected to the output of the selector of the information signal of the same name, the input of the signal selector, the input of the resolution interval generator and the input of the signal combining unit, the counting inputs of the scrambler and descrambler are interconnected and connected to the second output control bus, to the clock output of the information selector signals, the first input of the signal selector and the counting input of the counter, the output of the descrambler is connected to the second output information bus, the output the crembler through the signal combining unit is connected to the first input of the FISP, the second input of which is connected to the second input of the signal selector and the first signal output of the prohibit interval shaper after laying the handset, the second signal output of which is connected to the signal input of the standby signal shaper, the first signal output of the counter through FSFMT is connected to the first input of the FSWP and the second input of the prohibitory interval driver interconnected after laying the handset, the second signal the counter output channel is connected to the FSA first input of the same name, the third signal output is connected to the FSFN input of the same name, the fourth signal output is connected to the same input of the resolution interval former, the second output of which is connected to the third and second inputs of the signal selector and FSWP connected to each other, respectively, the third input which is connected to the second signal output FVyCHN, the third signal output of which is connected to the first signal input of the FSRA, the second and third signal inputs of which connected respectively to the FSFMT output of the same name and the third control input bus, the FSRA output through the FSA is connected to the fourth input of the signal combining unit, the signal selector output is connected to the fifth signal input, the FSMT control output is connected to the same input of the standby signal generator, FSWP control outputs, the signal selector and the clock selector are connected respectively to the third, first and fourth output control buses.