SU915279A1 - Device for automatic monitoring of voice frequency channels - Google Patents

Description

The invention relates to communication technology and can be used in the linear-hardware 'nodes, on the cross-channels of the primary networks, on the switching centers of the channels of fixed and mobile communication nodes.

A device for automatic control of channels of tone frequency is known. (PM) containing a channel set at the central station, the input of which is combined with the first input of the switch and connected to the first output of the control unit, the second output of which is connected to the combined inputs of the first and second integrators, the third output of the control unit is connected to the first input of the command frequency generator and the first input of the receiver, the first output of the first integrator through the first switch connected to the second input of the switch, the first output of the second integrator through the second switch connected to the third output row switch, the other input of

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and the switch output is connected respectively to the PM channel, and the second outputs of the first and second integrators are combined and connected to the control unit, the output of the command frequency generator and the second input of the receiver are connected respectively to the other input of the first switch and the other output of the second switch, and the output of the receiver connected to the recording unit of the monitoring results, and at the slave station, the receiver input of the command frequency is connected to the PM channel, the receiver output being connected via the delay element to the input n reklyuchatelya channels [1].

However, the known device has a long monitoring time and requires

2F additional equipment for grades *

• ki quality channels of the PM through the passage of discrete signals.

The purpose of the invention is to reduce the time of control and the expansion of the field

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the use of automatic control devices of the channels of PM.

The goal is achieved in that the automatic control of frequency channels, comprising at tsent- ₅ tral station channel set, the input of which is combined with the first input of the switch and is coupled with the first. the output of the control unit, the second output of which is connected to the combined inputs of the first second second integrator, the third output of the control unit is connected to the first input of the command frequency generator and to the first input of the receiver, the first output of the first integrato, 5 counter recording results counter The second input of the time counter is not connected with the second input of the switch. is connected to the third-rent sequence, and to it to the output of the switch, the others to input 20 _(the first output of the register registration block |

and the switch output is respectively connected to the PM channel, the second outputs of the first and second integrators are combined and connected to the second input of the control unit, while the output of the command frequency generator and the second input of the receiver are connected respectively to another input of the first switch and another output of the second switch, and the output of the receiver connected to the recording unit of the monitoring results, and at the slave station, the receiver input of the command frequency is connected to the PM channel, the receiver output through the delay element Linked to the first input of the channel switch, a modulator, a demodulator, a starting block, a recurrent sequence sensor, an error threshold number switch, a measurement time counter, a recurrent sequence transfer rate switch are entered at the central station, and a tone call receiver and a command generator are entered at the slave station frequency, while at the central station the output of the channel set is connected to another, the receiver input, the second output of which is connected to the first input of the control unit, the third output of the control unit ⁵⁰ through serially connected, the starting block and the sensor of the recurrent sequence are connected to the first input of the monitoring results recording unit, the second output of the starting block ^{55 55 is} connected to the input of the error threshold switch and to the input of the measurement time counter, the fourth output ^;

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The control unit is connected to another input of the sensor of the recurrent sequence via a switch of the transfer rate of the recurrent sequence, another output of which is connected via a modulator to the second input of the generator of the command frequency, while the second output of the receiver is connected to the second input of the monitoring result register through the demodulator, and the output of the switch error threshold and the output of the measurement time counter are connected to the third and fourth inputs respectively

The control unit is connected to the sixth input of the control unit, and the fifth output of the control unit is connected to the fifth input of the monitoring result recording unit, and at the slave station the input of the channel switch is connected to the input of the tone call receiver, the first output of which is connected to another input of the delay element, the second output This receiver is connected to the input of the command frequency generator.

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

The automatic control of the PM channels at the central station includes 1 channel set 2, switch 3, control unit 4, generator 5 of the command frequency, receiver 6, first 7 and second switch 8, respectively, recurrent sequence sensor 9, modulator 10, demodulator 11, starting unit · 12, first 13 and second 14 integrators, respectively, switch 15 (Error threshold number, measurement time counter 16, recurrent sequence transfer rate switch 17, monitoring results recording unit 18, and odchinennoy stations 19 ~ Channel switch 20, a receiver 21, a delay element 22, dial tone receiver 23, the command generator 24 frequency.

The device works as follows.

After a certain period of time on the command filed with the block-4

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control, at central station 1, switch 3 moves to the next fixed position, i.e. connects to the switch 3 through the channel set 2 channel TCh. Integrators 13 and 14 are connected to the receiving and transmitting paths of this channel in parallel with a high-resistance input, which fix the level in the channel paths.

If the channel has an integral level above a predetermined value, then that channel is considered to be occupied by the transmission of information. Otherwise, the channel is estimated free, i.e. not busy in this period of time with ¹⁵ information.

The result of the channel employment estimate determines the subsequent test program. The command from the control unit 4 sends a signal to the switch 20 3, which makes the next step and through the contacts of the first switch 7 to the transmitting branch of the channel instead of the first integrator 13 for a certain period of time the command frequency is connected, and through the contacts of the second switch 8, the receiver 6 is connected to the receiving branch instead of the second integrator 14 for the same period of time. 30

. At the same time, a signal is sent from the control unit 4 to the channel set 2. As a result, at the central station 1, the station equipment circuit is disconnected. ₃₅

At the slave station 19, the receiver 21, permanently connected to the channel, analyzes the incoming signal. If at the frequency and signal-to-noise ratio the received signal corresponds to the norm, then delay element 22 is triggered for timing and closes the circuit of the switch of the 20 channels.

As a result, the reception path is connected with the transmission path with channel equalization levels (generated "stub") is disconnected from the end station equipment 19 and the branch path to the station "transfer" connects dial tone receiver 23. By Nala The signal ⁰ from the control unit through the contact The first switch 7 from the generator 5 is supplied with the command frequency via the transmitting path of the test channel through the “loop” of the slave station ⁵⁵ 19, through the receiving path of this channel and received at the central station 1 by the receiver 6.

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The passage of the signal of the control frequency, normalized in amplitude and frequency, indicates the health of both the pacts of this channel 5 and this result is recorded in the recording unit 18 by a signal from the receiver 6. At the same time, the signal supplied from the control unit 4 sends a signal to the switches 7 ¹⁰ and 8 that work and through

their contacts are connected respectively to the transmission path and the reception path of the channel to the modulator 10 and the demodulator 11.

The control signal from the control unit 4 is also fed to the start-up unit 12, and from the latter a training signal is transmitted, which is fed to the sensor 9, the switch · 15 and the counter 16 of the measurement time. At the same time, a command is sent to the switch 17 of the transmission rate of the recurrent sequence, from which the start signal is fed to the inputs of the sensor 9 and the counter 16 of the measurement time.

The recurrent binary sequence of signals passes through the prepared “loop”: the transmission path of the PM channels, the switch circuit 20, the reception path of the PM channel, and after the demodulator enters block 18. The same recurrent sequence of signals from sensor 9 is supplied to the same block 18, which is synchronized by -, the sequence of signals received from the channel of PM.

Affected signals detected after comparing received signals and signals supplied from sensor 9 are recorded in block 18.

The mark of conformity of the quality of the channel to the norm is entered on the control unit 4, in which a signal is generated about the end of the test cycle. In block 18, it is recorded and displayed: time, number of the tested channel, test result "Go - Not pass". A connection is provided to the output unit 18, which allows you to display the measurement results to an external memory (computer) for storage, summarization and subsequent transfer to the communication control points.

The transition from one speed to another is carried out automatically with the output of test results for block 18. Upon receipt of data on the quality of the channel to the norm on

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the highest speed measurement cycle is suspended, which is fixed by the control unit, which generates a command for the switch and connect the device to the next channel.

In the case of sending a calling frequency from the station equipment (for example, data transmission equipment) to call the correspondent to exchange messages during the measurement, these signals are perceived by the receiver 6 of the central station 1 or the receiver of the 23.tonal call at the slave station 19.

In the first case, the output of the receiver is 6

It is connected to the control unit 4. In the control unit 4, a test termination command is generated, for which a signal is sent to the channel set 2, from. the operation of which restores the receive and transmit paths of the PM channel. In the direction of the slave station 13, the parcel is sent from the generator 5 of the command frequency, which is perceived by the receiver 21. The transmission paths are restored and

 reception at the subordinate station for the exchange of data.

In the second case, the output of the receiver 23 starts the generator of the command frequency 24, the signals of which are perceived by that. receiver 6, which ensures the suspension of the channel test and the restoration of the paths of the PM channel “

The application of the proposed device at communication centers allows to significantly reduce the measurement time and to use an automatic control device to assess the quality of PM channels intended both for telephone communication and data transmission, since all operations {connection (switching) of channels, evaluation of monitoring results, their registration and transfer to an external recording device (computer)) is carried out automatically without spending time on coordinated actions of the operators of both stations during preparation and during measurements, and the use of additional measuring equipment.

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Claims (1)

Claim A device for the automatic control of channels of tone frequency (PM), containing at the central station a ka-kit, the input of which 55 eight not connected to the first input of the switch and connected to the first output of the control unit, the second output of which is connected to the combined inputs of the first and second integrators, the third output of the control unit is connected to the first input of the command frequency generator and to the first input of the receiver, the first output of the first integrator is connected via the first switch with the second input of the switch, the first output of the second integrator is connected via a second switch to the third output of the switch of the torus, the other inputs and output of the switch are respectively connected to the PM channel, the second outputs of the first and second integrators are combined and connected to the second input of the control unit, while the output of the command-frequency generator and the second input of the receiver are connected respectively to another input of the first switch and another output of the second switch, and the output of the receiver is connected to the result recording unit control, and at the slave station the receiver’s command frequency input is connected to the PM channel, and the receiver’s output is connected to the channel switch input through the delay element, which distinguishes I have introduced a modulator, demodulator, starting unit, recurrent sequence sensor, error threshold switch, measurement time counter, recurrent sequence transfer rate switch, to reduce the monitoring time and expand the scope of application of automatic control devices of PM channels. and a tone station receiver and a command frequency generator were input at the slave station, while the central station’s output of the channel complex through another input when The control unit is connected to the first input of the control unit, the third output of which is connected to the first input of the monitoring results recording unit through the serially connected starting unit and sensor of the recurrent sequence, the second output of the starting unit is connected to the input of the switch of the threshold number of errors and the time counter of the measurements , the fourth output of the control unit through the switch of the transfer rate of the recurrent sequence is connected to another input of the sensor of the recurrent sequence® 9 915279 10 body; another output of which is connected via a modulator to the second input of the command frequency generator, and the second output of the receiver through the demodulator is connected to the second input of the monitoring results recording unit, and the output of the error threshold switch output and the output of the measurement time counter are connected respectively to the third and fourth inputs of the monitoring results recording unit and the second input of the measurement time counter is connected to the first output of the transfer rate switch of the recurrent sequence, the first in output of the control results recording unit is connected to the sixth input of the control unit, and the fifth output of the control unit is connected to the fifth input of the recording unit of the control results, and at the subordinate station the channel switch input is combined with the input of the tone call receiver, the first output of which is connected to another input of the delay element, and the second output of this U receiver is summed to the input of the command frequency generator.