CN110475035A - A kind of xDSL equipment with loop noise self-checking function - Google Patents
A kind of xDSL equipment with loop noise self-checking function Download PDFInfo
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- CN110475035A CN110475035A CN201910665413.4A CN201910665413A CN110475035A CN 110475035 A CN110475035 A CN 110475035A CN 201910665413 A CN201910665413 A CN 201910665413A CN 110475035 A CN110475035 A CN 110475035A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/345—Interference values
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
- H04M11/068—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors using time division multiplex techniques
Abstract
The invention discloses a kind of xDSL equipment with loop noise self-checking function, the equipment includes: control module, switching module and build-out resistor module；Wherein, control module is used to respond the loop noise self-checking command of user's input, generates first control signal, and first control signal is sent to switching module；Switching module is used to control the connection and disconnection between control module and build-out resistor module according to first control signal；Control module is also used to when control module is connected to build-out resistor module, tests signal to build-out resistor module transmitted noise；Build-out resistor module is used to the noisy test signal received being back to control module；Control module is also used to detect the received signal strength of the noisy test signal received, and according to the corresponding strength of transmitted signals of the noisy test signal and received signal strength, calculates the loop noise of equipment.The present invention can be realized the loop noise of xDSL equipment autonomously detection xDSL route.
Description
Technical field
The present invention relates to DSL technical field more particularly to a kind of xDSL equipment with loop noise self-checking function.
Background technique
Digital subscriber line (Digital Subscriber Line, DSL) technology is one kind using telephone wire as transmission medium
Transmission technology, and xDSL is the general name of various types of digital subscriber lines.Since DSL technology can be in transmission telephone network
Loop on support symmetrically and asymmetric transmission mode, solution Internet service provider (Intemet Service Provider,
ISP) the transmission problem between user, therefore using the telephone subscriber's loop being largely laid with, it is capable of providing the Yin Te of high speed
Net access reduces overhead, and application is more and more extensive.
When xDSL equipment is run, xDSL route is often possible to the noise jamming by various signals, in order to determine xDSL
Whether the noise of equipment is subjected to, if needs to place under repair to xDSL equipment, user needs to know that the loop of DSL line is made an uproar
Sound.However, in the prior art, xDSL equipment (such as xDSL router) passes through the DSL in DSL interface access telephone wire and ISP
Local side connection, to realize function of surfing the Net, the noiseproof feature of xDSL equipment can only lead to after xDSL equipment is connect with DSL local side
It crosses webpage and checks that relevant parameter could obtain, the parameter for obtaining loop noise can not be detected by xDSL equipment autonomously.
Summary of the invention
It is set the technical problem to be solved by the embodiment of the invention is that providing a kind of xDSL with loop noise self-checking function
It is standby, it can be realized the loop noise of xDSL equipment autonomously detection xDSL route.
In order to solve the above-mentioned technical problem, the embodiment of the invention provides a kind of xDSL with loop noise self-checking function to set
Standby, the equipment includes: control module, switching module and build-out resistor module；The switching module is connected to the control mould
Between block and the build-out resistor module, the control terminal of the control module is connect with the controlled end of the switching module；Wherein,
The control module is used to respond the loop noise self-checking command of user's input, generates first control signal, and will
The first control signal is sent to the switching module；
The switching module is used to control the control module and the build-out resistor mould according to the first control signal
Connection and disconnection between block；
The control module is also used to when the control module is connected to the build-out resistor module, to the matching electricity
It hinders module transmitted noise and tests signal；Wherein, the noisy test signal is the test signal of different frequency；The survey of different frequency
Trial signal corresponds to different strength of transmitted signals；
The build-out resistor module is used to the noisy test signal received being back to the control module；
The control module is also used to detect the received signal strength of the noisy test signal received, and according to the noise
The corresponding strength of transmitted signals of signal and received signal strength are tested, the loop noise of the equipment is calculated.
Further, the control module is specifically used for being calculated by the following formula the equipment in the test of any frequency
The intensity of corresponding loop noise under signal:
Sn=Sr+Nl-St
Wherein, SnFor the intensity of loop noise；SrFor the received signal strength of the test signal；NlIt is obtained to detect in advance
Attenuation when the test signal obtained transmits in the apparatus；StFor the strength of transmitted signals of the test signal.
Further, after the control module is completed to calculate the loop noise of the equipment, the control module is also
For:
According to the loop noise of the corresponding equipment under the test signal of different frequency and each frequency, generates loop and make an uproar
Sound Self-Check Report.
Further, the equipment further includes DSL interface；The DSL interface is connect with the switching module；Wherein,
The control module is also used to respond the normal work instruction of user's input, generates second control signal, and by institute
It states second control signal and is sent to the switching module；
The switching module be also used to be controlled according to the second control signal control module and the DSL interface it
Between connection and disconnection；
The DSL interface with DSL local side for connecting, so as to pass through the DSL between the equipment and the DSL local side
Interface transmission data.
Further, the control module includes transmission unit, receiving unit and hybrid circuit unit；Wherein,
The output end of the transmission unit is connect by transmitting line with the first end of the hybrid circuit unit, described to connect
The input terminal for receiving unit is connect by receiving circuit with the hybrid circuit unit second end；
The third end of the hybrid circuit unit is connect with the first end of the switching module, the hybrid circuit unit
4th end is connect with the second end of the switching module.
Further, the transmission unit includes digital analog converter and linear amplifier；Wherein,
The output end of the digital analog converter is connect with the input terminal of the linear amplifier, the linear amplifier it is defeated
Outlet is connect with the first end of the hybrid circuit unit.
Further, the receiving unit includes low-noise amplifier, filter and analog-digital converter；Wherein,
The input terminal of the low-noise amplifier is connect with the second end of the hybrid circuit unit, the low noise amplification
The output end of device is connect with the input terminal of the filter, the input of the output end of the filter and the AD conversion unit
End connection.
Further, the switching module includes relay and controlled circuit, the relay include the first switching switch,
Second switching switch and coil；Wherein,
The first end of the controlled circuit is connect with the first end of the coil, the second end of the controlled circuit with it is described
The second end of coil connects, and the controlled end of the controlled circuit is the controlled end of the switching module；
The fixed end of the first switching switch is the first end of the switching module, and the first of the first switching switch cuts
It changes end to connect with the first end of the DSL interface, the second switch terminal and the build-out resistor module of the first switching switch
First end connection；
The fixed end of the second switching switch is the second end of the switching module, and the first of the second switching switch cuts
It changes end to connect with the second end of the DSL interface, the second switch terminal and the build-out resistor module of the second switching switch
Second end connection.
Further, the controlled circuit includes diode, triode and first resistor；Wherein,
The first end of the diode is the first end of the controlled circuit, and the first end of the diode is also used to and supplies
Electric end connection；The second end of the diode is the second end of the controlled circuit；
The first end of the triode is connect with the first end of the first resistor, the second end of the triode with it is described
The second end of diode connects, the third end ground connection of the triode；
The second end of the first resistor is the controlled end of the controlled circuit.
Further, the triode is PNP type triode；
The base stage of the PNP type triode is the first end of the triode, the transmitting of the PNP type triode extremely institute
State the second end of triode, the third end of the extremely described triode of the current collection of the PNP type triode；
The first end of the diode is cathode, and the second end of the diode is anode.
Further, the build-out resistor module includes second resistance.
A kind of xDSL equipment with loop noise self-checking function of above-mentioned offer, can be surveyed by control module transmitted noise
Trial signal, and returned by build-out resistor module and received by control module, according to strength of transmitted signals and received signal strength
The loop noise of xDSL equipment under each frequency is calculated, xDSL equipment autonomously obtains the loop noise of equipment, can be realized xDSL
Equipment autonomously detects the loop noise of xDSL route, and surfing the Internet after xDSL equipment and the connection of DSL local side without user, it is related to check
Parameter grasps the loop noise of xDSL equipment convenient for user.
Detailed description of the invention
Fig. 1 is a kind of the first preferred embodiment of xDSL equipment with loop noise self-checking function provided by the invention
Structural schematic diagram；
Fig. 2 is a kind of second of preferred embodiment of xDSL equipment with loop noise self-checking function provided by the invention
Structural schematic diagram；
Fig. 3 is a kind of the third preferred embodiment of xDSL equipment with loop noise self-checking function provided by the invention
Structural schematic diagram；
Fig. 4 is a kind of the 4th kind of preferred embodiment of xDSL equipment with loop noise self-checking function provided by the invention
Structural schematic diagram.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The embodiment of the invention provides a kind of xDSL equipment with loop noise self-checking function, referring to Fig. 1, it is this hair
A kind of structural schematic diagram of the first preferred embodiment of xDSL equipment with loop noise self-checking function of bright offer, specifically
, the equipment includes: control module 1, switching module 2 and build-out resistor module 3；The switching module 2 is connected to the control
Between molding block 1 and the build-out resistor module 3, the controlled end of the control terminal of the control module 1 and the switching module 2 connects
It connects；Wherein,
The control module 1 is used to respond the loop noise self-checking command of user's input, generates first control signal, and will
The first control signal is sent to the switching module 2；
The switching module 2 is used to control the control module 1 and the build-out resistor according to the first control signal
Connection and disconnection between module 3；
The control module 1 is also used to when the control module 1 is connected to the build-out resistor module 3, to described
Signal is tested with 3 transmitted noise of resistive module；Wherein, the noisy test signal is the test signal of different frequency；Different frequencies
The test signal of rate corresponds to different strength of transmitted signals；
The build-out resistor module 3 is used to the noisy test signal received being back to the control module 1；
The control module 1 is also used to detect the received signal strength of the noisy test signal received, and is made an uproar according to this
The corresponding strength of transmitted signals of sounding trial signal and received signal strength, calculate the loop noise of the equipment.
Specifically, inputting loop noise self-checking command when user needs to know the loop noise of xDSL equipment, mould is controlled
Block responds loop noise self-checking command, generate first control signal and be simultaneously sent to switching module, and switching module is according to receiving
Connection and on-off between control module and build-out resistor module are realized in first control signal control；When in control module and distribution
When hindering module connection, control module tests signal to build-out resistor module transmitted noise, the test letter under each of these frequency
Number according to corresponding strength of transmitted signals send；Noisy test signal is back to control module by build-out resistor module, is controlled
Molding block receives, and the loop that such noisy test signal just have passed through xDSL equipment returns to control module；Control module receives
When to noisy test signal, the received signal strength of the noisy test signal received is detected, and according to the noisy test signal
Corresponding strength of transmitted signals and received signal strength calculate the loop noise of xDSL equipment, complete the test letter of all frequencies
The loop noise of number lower xDSL equipment calculates, in this way, xDSL equipment can get xDSL equipment institute under the test signal of different frequency
Corresponding loop noise can be realized the loop noise of xDSL equipment autonomously detection xDSL route.
It should be noted that the connection and on-off between control module and build-out resistor module are by control data transmission
What the connection and disconnection of route were realized, and may be configured as first control signal and first control between control module and build-out resistor module
Connection, into Auto-Sensing Mode, after the completion of self-test, control first control signal first control control module and build-out resistor module it
Separated end process of self-test.Control module tests signal by transmitting line transmitted noise, is received and is returned by receiving circuit
Noisy test signal.
It should be noted that noisy test signal is the test signal of different frequency, the test signal of each frequency is right
There should be strength of transmitted signals, control module can successively send the test signal of different frequency, and successively detection calculates each frequency
Test the loop noise of xDSL equipment under signal, the loop noise of acquisition xDSL equipment corresponding loop noise in specific frequency
Content of parameter.When calculating the loop noise of equipment, according to the strength of transmitted signals of the noisy test signal under a certain frequency and
The loop noise that received signal strength calculates is the loop noise of equipment under the frequency, that is, calculates equipment pair under each frequency
When the loop noise answered, the strength of transmitted signals of foundation and test signal corresponding to received signal strength should frequency it is consistent.
A kind of xDSL equipment with loop noise self-checking function provided in an embodiment of the present invention, can be sent out by control module
Noisy test signal is sent, and is returned by build-out resistor module and is received by control module, according to strength of transmitted signals and reception
Signal strength calculates the loop noise of xDSL equipment under each frequency, and xDSL equipment autonomously obtains the loop noise of equipment, can
The loop noise for realizing xDSL equipment autonomously detection xDSL route, surfs the Internet after connecting xDSL equipment with DSL local side without user
It checks relevant parameter, the loop noise of xDSL equipment is grasped convenient for user.
Preferably, the control module 1 is specifically used for being calculated by the following formula the equipment in the test of any frequency
The intensity of corresponding loop noise under signal:
Sn=Sr+Nl-St
Wherein, SnFor the intensity of loop noise；SrFor the received signal strength of the test signal；NlIt is obtained to detect in advance
Attenuation when the test signal obtained transmits in the apparatus；StFor the strength of transmitted signals of the test signal.
Specifically, passing through formula S for the intensity of loop noisen=Sr+Nl-StIt calculates and obtains.Attenuation is design
The parameter being obtained ahead of time when xDSL equipment.
Preferably, after the control module 1 is completed to calculate the loop noise of the equipment, the control module 1 is also
For:
According to the loop noise of the corresponding equipment under the test signal of different frequency and each frequency, generates loop and make an uproar
Sound Self-Check Report.
Specifically, control module generates loop after the loop noise that equipment is completed in detection, according to detected information
Noise Self-Check Report.
Transmission for loop noise Self-Check Report optionally, can if PC equipment is only connect with the LAN of xDSL equipment mouth
It is set as prompting whether to download loop noise Self-Check Report after the completion of xDSL equipment self-inspection, user clicks downloading and can set xDSL
Standby loop noise Self-Check Report is transmitted to PC equipment.If PC equipment is connect with xDSL equipment by serial ports, xDSL may be configured as
After the completion of equipment self-inspection, whether loop noise Self-Check Report is saved to PC equipment by serial ports prompt, user selects to save
The loop noise Self-Check Report preservation of xDSL equipment is transmitted to PC equipment.
Preferably, referring to Fig. 2, it is the of a kind of xDSL equipment with loop noise self-checking function provided by the invention
The structural schematic diagram of two kinds of preferred embodiments；The equipment further includes DSL interface 4；The DSL interface 4 and the switching module 2
Connection；Wherein,
The control module 1 is also used to respond the normal work instruction of user's input, generates second control signal, and by institute
It states second control signal and is sent to the switching module 2；
The switching module 2 is also used to control the control module 1 and the DSL interface according to the second control signal
Connection and disconnection between 4；
The DSL interface 4 with DSL local side for connecting, so that by described between the equipment and the DSL local side
DSL interface transmission data.
Specifically, control module obtains when working normally instruction, second control signal is generated, and be sent to switching module,
So that switching module is controlled connection and disconnection between control module and DSL interface according to second control signal, when control module with
When connection between DSL interface, xDSL equipment can carry out data transmission with the DSL local side being connected on DSL interface.
It should be noted that working normally instruction can be user's additional input, it is also possible to be set as loop noise
Self-test after the completion of, default user input work normally instruction, it may be assumed that after the completion of the self-test of loop noise, pass through switching module will
XDSL equipment automatically switches to normal mode of operation by loop Auto-Sensing Mode.
A kind of xDSL equipment with loop noise self-checking function provided in an embodiment of the present invention can pass through switching module reality
Existing xDSL equipment switches between loop Auto-Sensing Mode and normal mode of operation, can autonomous detection loop noise, also can be normal
Carry out data transmission with DSL local side.
Preferably, the control module 1 includes transmission unit 110, receiving unit 120 and hybrid circuit unit 130；Its
In,
The output end of the transmission unit 110 is connected by the first end of transmitting line TX and the hybrid circuit unit 130
It connects, the input terminal of the receiving unit 120 is connect by receiving circuit RX with 130 second end of hybrid circuit unit；
The third end of the hybrid circuit unit 130 is connect with the first end of the switching module 2, the hybrid circuit list
4th end of member 130 is connect with the second end of the switching module 2.
Specifically, passing through transmission as shown in Fig. 2, control module includes transmission unit, receiving unit and hybrid circuit unit
Unit sends signal, receives signal by receiving unit, the generation of echo is reduced by hybrid circuit unit, eliminates the letter of transmission
Interference number to received signal.
A kind of xDSL equipment with loop noise self-checking function provided in an embodiment of the present invention, can be realized the signal of transmission
It is transmitted with the branch of received signal, and interference of the signal to received signal of transmission can be eliminated.
Preferably, referring to Fig. 3, it is the of a kind of xDSL equipment with loop noise self-checking function provided by the invention
The structural schematic diagram of three kinds of preferred embodiments；The transmission unit 110 includes digital analog converter 111 and linear amplifier 112；Its
In,
The output end of the digital analog converter 111 is connect with the input terminal of the linear amplifier 112, the Linear Amplifer
The output end of device 112 is connect with the first end of the hybrid circuit unit 130.
Specifically, transmission unit includes digital analog converter and linear amplifier, it can will be sent and be believed by digital analog converter
Number digital-to-analogue conversion is carried out, will be sent after signal amplifies processing by linearly sending out device big and be delivered to hybrid circuit unit, for
Other modules are handled.
Preferably, as shown in figure 3, the receiving unit 120 turns including low-noise amplifier 121, filter 122 and modulus
Parallel operation 123；Wherein,
The input terminal of the low-noise amplifier 121 is connect with the second end of the hybrid circuit unit 130, the low noise
The output end of acoustic amplifier 121 is connect with the input terminal of the filter 122, the output end and the mould of the filter 122
The input terminal connection of number converting unit 123.
Specifically, receiving unit includes low-noise amplifier, filter and analog-digital converter, low noise amplification can be passed through
The signal that device inputs hybrid circuit module amplifies, and after filtering out interference by filter, docks by analog-digital converter
The signal of receipts carries out analog-to-digital conversion, so that equipment is handled.
Preferably, the switching module 2 includes relay 210 and controlled circuit 220, and the relay 210 includes first
Switch switch SW1, the second switching switch SW2 and coil 211；Wherein,
The first end of the controlled circuit 220 is connect with the first end of the coil 211, and the of the controlled circuit 220
Two ends are connect with the second end of the coil 211, and the controlled end of the controlled circuit 220 is the controlled end of the switching module 2；
The fixed end of the first switching switch SW1 is the first end of the switching module 2, the first switching switch SW1
The first switch terminal connect with the first end of the DSL interface 4, it is described first switching switch SW1 the second switch terminal with it is described
The first end of build-out resistor module 3 connects；
The fixed end of the second switching switch SW2 is the second end of the switching module 2, the second switching switch SW2
The first switch terminal connect with the second end of the DSL interface 4, it is described second switching switch SW2 the second switch terminal with it is described
The second end of build-out resistor module 3 connects.
Specifically, the control terminal of control module sends control signal to the controlled end of controlled circuit, controlled circuit is according to defeated
Enter to control the energization and power-off of the coil of signal control relay.When the coil is energized, the first switching module and the second switching mould
The transfer strip of block is got off by suction, and when coil no power, the transfer strip of the first switching module and the second switching module is by bullet
Property element pull on, switching module can be so controlled by control module, realizes switching control DSL interface and control module
Connection and disconnection and the connection and disconnection of build-out resistor module and control module.
Preferably, referring to Fig. 4, it is the of a kind of xDSL equipment with loop noise self-checking function provided by the invention
The structural schematic diagram of four kinds of preferred embodiments；The controlled circuit 220 includes diode D, triode Q and first resistor R1；Its
In,
The first end of the diode D is the first end of the controlled circuit 220, and the first end of the diode D is also used
It is connect in feeder ear；The second end of the diode D is the second end of the controlled circuit 220；
The first end of the triode Q is connect with the first end of the first resistor R1, the second end of the triode Q with
The second end of the diode D connects, the third end ground connection of the triode Q；
The second end of the first resistor R1 is the controlled end of the controlled circuit 220.
Specifically, the voltage U1 of the controlled end of control module control controlled circuit, is inputted by voltage U1 and feeder ear
Voltage U2 is divided in first resistor, triode and diode, and whether each end voltage for controlling triode meets turn-on condition,
And then whether control coil is powered, the both ends of diode are parallel to the both ends of coil, for vising the voltage at coil both ends, protect
Controlled circuit.
It should be noted that those skilled in the art can control the size of the voltage U2 of voltage U1 and feeder ear input,
And according to the on state characteristic of different types of triode, diode characteristic, to determine that each end of triode, diode are respectively held
Connection type, as long as being able to achieve a kind of beneficial effect of xDSL equipment with loop noise self-checking function provided by the invention i.e.
It can.
Preferably, the triode Q is PNP type triode；
The base stage of the PNP type triode is the first end of the triode Q, and the transmitting of the PNP type triode is extremely
The second end of the triode Q, the third end of the extremely described triode Q of the current collection of the PNP type triode；
The first end of the diode D is cathode, and the second end of the diode D is anode.
Specifically, the first end of diode D is cathode, and the second end of diode D is when triode Q is PNP type triode
When anode, the energization of controlled circuit control coil and cold process are as follows:
Assuming that the voltage U2 of feeder ear is 3.3V, when control module exports low level to the second end of first resistor, by
It is greater than the voltage of base stage in the voltage of the emitter of PNP type triode, PNP type triode conducting, electric current can be through the line of relay
Circle flows into collector, and forming circuit, coil is powered at this time；When control module exports high level to the second end of first resistor,
Since the voltage of the emitter of PNP type triode is not more than the voltage of base stage, PNP type triode is not turned on, and coil is obstructed at this time
Electricity.
Preferably, the build-out resistor module includes second resistance.
It is received specifically, noisy test signal is back to control module by second resistance.Second resistance has impedance
The effect matched.Optionally, the resistance value of second resistance is 100 ohm.
When it is implemented, specifically, inputting loop noise self-test when user needs to know the loop noise of xDSL equipment
Instruction, control module respond loop noise self-checking command, generate first control signal and are sent to switching module, switching module root
The connection and on-off between control module and build-out resistor module are realized according to the first control signal control received；When controlling
When module with resistive module with being connected to, control module tests signal, each of these frequency to build-out resistor module transmitted noise
Under test signal sent according to corresponding strength of transmitted signals；Noisy test signal is back to control by build-out resistor module
Module is received by control module, and the loop that such noisy test signal just have passed through xDSL equipment returns to control module；Control
When module receives noisy test signal, the received signal strength of the noisy test signal received is detected, and according to the noise
The corresponding strength of transmitted signals of signal and received signal strength are tested, the loop noise of xDSL equipment is calculated, completes all frequencies
Test signal under xDSL equipment loop noise calculate, in this way, xDSL equipment can get different frequency test signal under
Loop noise corresponding to xDSL equipment can be realized the loop noise of xDSL equipment autonomously detection xDSL route.
A kind of xDSL equipment with loop noise self-checking function provided in an embodiment of the present invention, can be sent out by control module
Noisy test signal is sent, and is returned by build-out resistor module and is received by control module, according to strength of transmitted signals and reception
Signal strength calculates the loop noise of xDSL equipment under each frequency, and xDSL equipment autonomously obtains the loop noise of equipment, can
Allow xDSL equipment with loop noise self-checking function, surfing the Internet after xDSL equipment and the connection of DSL local side without user, it is related to check
Parameter grasps the loop noise of xDSL equipment convenient for user.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (11)
1. a kind of xDSL equipment with loop noise self-checking function, which is characterized in that the equipment includes: control module, switching
Module and build-out resistor module；The switching module is connected between the control module and the build-out resistor module, described
The control terminal of control module is connect with the controlled end of the switching module；Wherein,
The control module is used to respond the loop noise self-checking command of user's input, generates first control signal, and will be described
First control signal is sent to the switching module；
The switching module be used to be controlled according to the first control signal control module and the build-out resistor module it
Between connection and disconnection；
The control module is also used to when the control module is connected to the build-out resistor module, Xiang Suoshu build-out resistor mould
Block transmitted noise tests signal；Wherein, the noisy test signal is the test signal of different frequency；The test of different frequency is believed
Number corresponding different strength of transmitted signals；
The build-out resistor module is used to the noisy test signal received being back to the control module；
The control module is also used to detect the received signal strength of the noisy test signal received, and according to the noise testing
The corresponding strength of transmitted signals of signal and received signal strength, calculate the loop noise of the equipment.
2. as described in claim 1 with the xDSL equipment of loop noise self-checking function, which is characterized in that the control module tool
Body is used to be calculated by the following formula the intensity of the equipment corresponding loop noise under the test signal of any frequency:
Sn=Sr+Nl-St
Wherein, SnFor the intensity of loop noise；SrFor the received signal strength of the test signal；NlIt is detected in advance
Attenuation when the test signal transmits in the apparatus；StFor the strength of transmitted signals of the test signal.
3. as described in claim 1 with the xDSL equipment of loop noise self-checking function, which is characterized in that in the control module
After the loop noise for completing the calculating equipment, the control module is also used to:
According to the loop noise of the corresponding equipment under the test signal of different frequency and each frequency, loop noise is generated certainly
Inspection report.
4. as described in claim 1 with the xDSL equipment of loop noise self-checking function, which is characterized in that the equipment further includes
DSL interface；The DSL interface is connect with the switching module；Wherein,
The control module is also used to respond the normal work instruction of user's input, generates second control signal, and by described the
Two control signals are sent to the switching module；
The switching module is also used to be controlled between the control module and the DSL interface according to the second control signal
Connection and disconnection；
The DSL interface with DSL local side for connecting, so as to pass through the DSL interface between the equipment and the DSL local side
Transmit data.
5. as claimed in claim 4 with the xDSL equipment of loop noise self-checking function, which is characterized in that the control module packet
Include transmission unit, receiving unit and hybrid circuit unit；Wherein,
The output end of the transmission unit is connect by transmitting line with the first end of the hybrid circuit unit, and the reception is single
The input terminal of member is connect by receiving circuit with the hybrid circuit unit second end；
The third end of the hybrid circuit unit is connect with the first end of the switching module, and the 4th of the hybrid circuit unit the
End is connect with the second end of the switching module.
6. as claimed in claim 5 with the xDSL equipment of loop noise self-checking function, which is characterized in that the transmission unit packet
Include digital analog converter and linear amplifier；Wherein,
The output end of the digital analog converter is connect with the input terminal of the linear amplifier, the output end of the linear amplifier
It is connect with the first end of the hybrid circuit unit.
7. as claimed in claim 5 with the xDSL equipment of loop noise self-checking function, which is characterized in that the receiving unit packet
Include low-noise amplifier, filter and analog-digital converter；Wherein,
The input terminal of the low-noise amplifier is connect with the second end of the hybrid circuit unit, the low-noise amplifier
Output end is connect with the input terminal of the filter, and the input terminal of the output end of the filter and the AD conversion unit connects
It connects.
8. as claimed in claim 5 with the xDSL equipment of loop noise self-checking function, which is characterized in that the switching module packet
Relay and controlled circuit are included, the relay includes the first switching switch, the second switching switch and coil；Wherein,
The first end of the controlled circuit is connect with the first end of the coil, the second end of the controlled circuit and the coil
Second end connection, the controlled end of the controlled circuit is the controlled end of the switching module；
The fixed end of the first switching switch is the first end of the switching module, the first switch terminal of the first switching switch
It is connect with the first end of the DSL interface, the of the second switch terminal of the first switching switch and the build-out resistor module
One end connection；
The fixed end of the second switching switch is the second end of the switching module, the first switch terminal of the second switching switch
It is connect with the second end of the DSL interface, the of the second switch terminal of the second switching switch and the build-out resistor module
The connection of two ends.
9. as claimed in claim 8 with the xDSL equipment of loop noise self-checking function, which is characterized in that the controlled circuit packet
Include diode, triode and first resistor；Wherein,
The first end of the diode is the first end of the controlled circuit, and the first end of the diode is also used to and feeder ear
Connection；The second end of the diode is the second end of the controlled circuit；
The first end of the triode is connect with the first end of the first resistor, the second end of the triode and two pole
The second end of pipe connects, the third end ground connection of the triode；
The second end of the first resistor is the controlled end of the controlled circuit.
10. as claimed in claim 9 with the xDSL equipment of loop noise self-checking function, which is characterized in that the triode is
PNP type triode；
The base stage of the PNP type triode is the first end of the triode, the transmitting of the PNP type triode extremely described three
The second end of pole pipe, the third end of the extremely described triode of the current collection of the PNP type triode；
The first end of the diode is cathode, and the second end of the diode is anode.
11. the xDSL equipment with loop noise self-checking function as described in claims 1 to 10 any one, which is characterized in that
The build-out resistor module includes second resistance.
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Address after: 5 / F, fulizhen building, No.1, Kefa Road, high tech park, Nanshan District, Shenzhen, Guangdong 518000 Patentee after: Shenzhen Lianzhou International Technology Co.,Ltd. Address before: 5 / F, fulizhen building, No.1, Kefa Road, high tech park, Nanshan District, Shenzhen, Guangdong 518000 Patentee before: SHENZHEN PUWEI TECHNOLOGY CO.,LTD. |