RU2224381C2 - Device for quality control of telegraph and telephone communication channels - Google Patents

Abstract

FIELD: wire and radio communications engineering. SUBSTANCE: device that can be used as component part of computer-based control and monitoring means for stationary radio centers, computer-based communication systems , and as separate device has newly introduced second and third standard-frequency sensors and communication adapter interconnected and connected to other component parts of device through main parallel interface; output of second standard-frequency sensor is connected to second input of telegraph signal analyzer; first output of third standard-frequency sensor is connected to input of telegraph signal generator, and second output of third standard-frequency sensor, to second input of telephone signal level meter. EFFECT: enlarged functional capabilities, remote-control channel redundancy provision, improved repairability of device. 1 cl, 1 dwg

Description

 The invention relates to techniques for wired and radio communications and can be used as part of a complex of automated control and monitoring tools at stationary radio centers, as part of mobile automated communication systems, as well as autonomously.

 A device for monitoring the quality of telegraph and telephone channels, comprising a microprocessor control unit, a reference frequency sensor, a telegraph signal sensor, a telegraph interface, a telegraph signal analyzer, a telephone signal generator and a telephone signal level meter, connected to each other via a parallel main interface, reference frequency sensor, telegraph signal sensor, telegraph interface and telegraph signal analyzer are connected in series, and the output for generators telephone signals is connected to a first input of the level gauge telephone signals [1].

 However, the known device is controlled remotely through only one channel, the failure of which means the exclusion of the device from the complex of automated control and monitoring tools. The use in a known device of a single reference frequency sensor entails a complication of the circuit of its construction and reduces the maintainability of the device.

 The objective of the invention, firstly, is to expand the functionality of the device for monitoring the quality of telegraph and telephone channels, in particular, to provide the ability to reserve a remote control channel of the device, and, secondly, to improve the maintainability of the device.

 The problem is solved by introducing into the device for monitoring the quality of telegraph and telephone channels a second and third reference frequency sensors and a communication adapter connected to each other and to a microprocessor control unit, a reference frequency sensor, a telegraph signal sensor, a telegraph interface, a telegraph signal analyzer, a telephone generator signals and the level meter of telephone signals through the main parallel interface, while the output of the second reference frequency sensor is connected to the second input a telegraph signals analyzer, the first output of the third reference frequency sensor is connected to the input of the telephone signal generator, and the second output of the third reference frequency sensor is connected to the second input of the telephone signal level meter.

 The drawing shows a structural diagram of the proposed device.

 The device for monitoring the quality of telegraph and telephone channels contains a microprocessor control unit 1, a communication adapter 10, a reference frequency sensor 2, a telegraph signal sensor 3, a telegraph interface 4, a second 8 and a third 9 reference sensors connected to each other via a parallel main interface (MPI) frequencies, telegraph signal analyzer 5, telephone signal generator 6 and telephone signal level meter 7. Reference frequency sensor 2, telegraph signal sensor 3, telegraph interface 4 and telegraph signal analyzer Alov 5 are connected in series. The output of the second reference frequency sensor 8 is connected to the second input of the telegraph signal analyzer 5. The second output of the telephone signal generator 6 is connected to the first input of the telephone signal level meter 7. The first output of the third reference frequency sensor 9 is connected to the input of the telephone signal generator 6, and the second output of the third the reference frequency sensor 9 is connected to the second input of the telephone signal level meter 7.

The device operates as follows
A measuring telegraph signal of a given structure with a given telegraphing speed is supplied from the output of the telegraph signal sensor 3 to the first input of the telegraph interface 4, and from its first output (TLG output) enters the line. In the telegraph interface circuits 4, the telegraph signal level is converted, ensuring the output of the telegraph signal sensor 3 is aligned with the line. Output telegraph circuits have electronic overload protection.

 The input of the telegraph signal analyzer 5 is connected to the line through the matching input circuit of the telegraph interface 4, which has surge protection. The telegraph signal is fed to the second input (VH. TLG) telegraph interface 4, which converts the signal level. From the second output of the telegraph interface 4, the telegraph signal is fed to the first input of the telegraph signal analyzer 5. The results of the analysis of telegraph signals are the magnitude and sign of edge distortions, as well as information about the presence of crushing and gaps in the reception of the signal.

 The generator of telephone signals 6 provides the formation and issuance in line of the first output (Output TLF) sinusoidal signals of a given frequency and a given level.

 A telephone signal level meter 7 with automatic selection of the measurement limit is connected to the line by its third input (Input. TLF). The level of telephone signals is measured in narrow-band or wide-band operation with the output of measurements in decibels, neper or millivolts.

 The device for controlling the quality of telegraph and telephone channels is controlled either locally, from the front panel of the device, or remotely, using one of the three channels (1 remote control channel, 2 dripping remote control or 3 remote control channel) of a remote control, for example, at the IRPS interface.

 Both with local and remote control of the device, the operation of the component parts of the device is controlled through the microprocessor control unit 1. Data exchange between the microprocessor control unit 1 and all component parts of the device is carried out via the main parallel interface (MPI).

 2 and 3 channels of the remote control are connected to the microprocessor control unit 1 through a communication adapter 10, which provides the transmission of response messages (receipts to received control commands, device status messages for monitoring the quality of telegraph and telephone channels, messages on the results of analysis of telegraph and telephone signals) by external devices via the remote control channel through which the control command was received or a request was received on the status of the device for monitoring the quality of telegraph and telephone channels fishing or request signal analysis results. This allows you to use one of these remote control channels as the main one, and the other as a backup remote control channel.

 An additional opportunity to reserve a remote control channel is provided when using 1 channel of the remote control connected to the input / output of the microprocessor control unit 1 and having priority over 2 and 3 channels of the remote control.

 Via the microprocessor control unit 1, data on setting the structure of the output signal - 1: 1 (dots), 6: 1, 1: 6, Barker combination (3: 2: 1: 1), and so on - is transmitted to the telegraph signal sensor 3 via a parallel main interface .d., to set the output signal level, to set the synchronization mode of the generated signal - synchronous or start-stop, to set the signal generation mode - in positive or negative, to set the value of edge distortions introduced into the generated signal, as well as the command about the need for transcoding telegraph information when operating in G1B mode.

 For the telegraph signal analyzer 5, through the microprocessor control unit 1, the input signal synchronization mode is set - synchronous or start-stop.

 The telegraphy speed for the telegraph signal sensor 3 and for the telegraph signal analyzer 5 is set by setting the frequency values of the reference frequencies through the microprocessor control unit 1, respectively, on the reference frequency sensor 2 and the second reference frequency sensor 8. The voltage of the reference frequency corresponding to the specified telegraphy speed is output reference frequency sensor 2 to the input of the telegraph signal sensor 3, and from the output of the second reference frequency sensor 8 to the second input of the telegraph signal analyzer 5.

 For the generator of telephonic signals 6 through the microprocessor control unit 1, the level of the generated sinusoidal signal in decibels, neper or millivolts and the line load resistance (600 or 150 Ohms) are set.

 The frequency of the sinusoidal signal generated by the telephone signal generator 6 is set by setting the value of the reference frequency on the third reference frequency sensor 9 through the microprocessor control unit 1. In this case, the voltage of the reference frequency corresponding to the given frequency of the generated sinusoidal signal is supplied from the first output of the third reference frequency sensor 9 to telephone signal generator input 6.

 For the level meter of telephone signals 7 through the microprocessor control unit 1, the input resistance value of the meter is set (600 or 150 Ohms if the line load is a level meter of telephone signals 7, and 100 kOhms if a load of 600 or 150 is connected to the line parallel to the meter of telephone signals 7 Ohm), meter operation mode (narrow-band or wide-band) and the required dimension of the level measurement result (decibels, neper or millivolts).

 The results of the analysis of telegraph signals and the results of measurements of the level of telephone signals are transmitted respectively from the analyzer of telegraph signals 5 and from the meter of the level of telephone signals 7 via the main parallel interface to the microprocessor control unit 1, which provides the output of the results to the front panel of the device for monitoring the quality of telegraph and telephone channels (when local control of the device) or transferring the results to an external device (upon request) via 1 channel of the remote control or, through the adapter communication 10, on channel 2 or 3 of the remote control.

 When you turn on the device for monitoring the quality of telegraph and telephone channels, both with local and remote control, it is initialized and switches to self-monitoring mode. In this case, the telegraph signal sensor 3 and the telegraph signal analyzer 5, as well as the telephone signal generator 6 and the telephone signal level meter 7 are switched to the “on-the-go” mode: the telegraph signal from the output of the telegraph signal sensor 3 through the telegraph interface 4, from its second output is fed to the first input of the telegraph signal analyzer 5, and the telephone signal from the second output of the telephone signal generator 6 is fed to the first input of the telephone signal level meter 7. Based on the results of self-monitoring in the microprocess Weed control unit 1, formed condition evaluation device for monitoring the quality of telegraph and telephone channels, which is given to the front panel of the device or transmitted to an external device for a working channel remote control. If the results of self-monitoring are positive, a “Ready” mark is formed, and the telegraph signal sensor 3, telegraph signal analyzer 5, telephone signal generator 6 and telephone signal level meter 7 are switched to line operation mode.

Sources of information
1. UDC 621.317.743. V.M. Lobachev, N.P. Yazov, V.D. Bogachev. Quality control device for telegraph and telephone channels. Radio engineering, 1994, issue 1 (prototype).

Claims (1)

A device for monitoring the quality of telegraph and telephone channels, comprising a microprocessor control unit, a reference frequency sensor, a telegraph signal sensor, a telegraph interface, a telegraph signal analyzer, a telephone signal generator and a telephone signal level meter connected to each other via a parallel main interface, the sensor reference frequencies, the telegraph signal sensor, the telegraph interface and the telegraph signal analyzer are connected in series, and the second output a telephone signal generator is connected to a first input of a telephone signal level meter, characterized in that a second and third reference frequency sensors and a communication adapter connected to each other and to a microprocessor control unit, a reference frequency sensor are introduced into the device for monitoring the quality of telegraph and telephone channels, telegraph signal sensor, telegraph interface, the first output and the second input of which are connected to the line, the telegraph signal analyzer, the telephone signal generator, the first output of which is dined with a line, and a telephone signal level meter, the third input of which is connected to the line through a parallel main interface, while the output of the second reference frequency sensor is connected to the second input of the telegraph signal analyzer, the first output of the third reference frequency sensor is connected to the input of the telephone signal generator, and the second output of the third reference frequency sensor is connected to the second input of the telephone signal level meter.