CN2930111Y - VDSL2 line detector - Google Patents

Abstract

The utility model discloses a VDSL 2 circuit tester used for testing the user's circuit linkage property and appraising the data transmission quality which comprises a program storage device, a system internal memory, a CPU, a display, a testing interface, a DMM module and a VDSL2 Modem module, wherein, the VDSL 2 circuit tester is additionally provided with a serial port commutation port whose public end is connected with an RS232serial interface of the CPU and two output ends are connected with the DMM module and the VDSL2 Modem module. The circuit input ends of the DMM module and the VDSL2 Modem module are connected with the testing interface. The VDSL 2 circuit tester connecting the circuit under measurement into the DMM module and the VDSL2 Modem module through the testing interface can not only test the ADSL operation, but also accomplish the testing to the VDSL 2 new operation and launch network level testing with high working efficiency and wide application.

Description

The VDSL2 line tester

Affiliated technical field

The utility model provides a kind of VDSL2 line tester that is used for detecting user's line link performance and assessment data transmission quality, belongs to technical field of telecommunications.

Technical background

VDSL2 (Very high bit-rate DSL 2), Chinese is superelevation bit rate Digital Subscriber Line 2, insert the technology of Internet as a kind of emerging high speed, G.993.2 its standard obtains formally to pass through in the ITU-T SG15 in February, 2006 meeting.This technology is to adopt digital coding and modulation-demodulation technique to go up at user's copper twisted pair (ordinary telephone line) of routine to transmit wideband digital signal.VDSL2 mainly is mainly reflected in following four aspects especially: (1) transmittability is powerful, (2) functional characteristic abundant, (3) adapt to plurality of application scenes, (4) compatible existing main DSL technology.Just be based on the special of these four aspects, in present or the coming years, will obtaining application more and more widely.

VDSL2 can carry out the self adaptation of ADSL2+, ADSL, VDSL (DMT) pattern according to the circuit situation for the circuit of different quality on the copper twisted pair of various distances, but its link performance performance also exists very big difference.For the data access service of opening on the copper twisted pair of existing longer distance, its transmission range is long more, and is also serious more to the decay of signal.Therefore, the user is when this type of business of application, and telecommunications company or ISP (Internet Service Provider, Internet link service provider) must determine whether this user's copper cable has possessed this type of ability professional and performance requirement of opening.Equally, in the process that the user uses, if when the not high situation of service disconnection or network connection quality takes place, telecommunications company or ISP also must determine to influence the factor of service operation, so that fix a breakdown.

State Intellectual Property Office is in the utility model patent of issue on February 7th, 2002, application number is: 02212649.X, the name of utility model is called: the adsl line tester, its major technique content is: provide a kind of can be by measurement circuit ADSL link parameter and the DMM parameter quality of comprehensively judging circuit and fault, test result intuitively, can search the fault point fast, the adsl line tester that can converse and get in touch with Originating Office.Its weak point is that test event is simple, only limits to the test to the ADSL business, can not finish the test to this new business of VDSL2, can not carry out the test of network layer, inefficiency, and the scope of application is little.

The utility model content

Goal of the invention of the present utility model provide a kind of can overcome above-mentioned defective, test result intuitively simply, accurately and reliably, multiple functional VDSL2 line tester.Its technical scheme is:

Comprise program storage, Installed System Memory, CPU, display, test interface, DMM module and VDSL2 Modem module, it is characterized in that: set up the serial ports commutation circuit, its public end connects the RS232 serial port of CPU, two output connects DMM module and VDSL2 Modem module respectively, and the circuit of DMM module and VDSL2 Modem module inserts the termination test interface.

Described VDSL2 line tester, the Digital Multi-Meter Test module comprises relay K 1-4, the vdct unit, the alternating voltage test cell, circuit loop resistance test cell, line capacitance test cell and line insulation test unit, wherein the vdct unit is connected to normal-closed end 1 pin of relay K 2,4 pin, the alternating voltage test cell is connected to Chang Kaiduan 3 pin of relay K 2,6 pin, common port 2 pin of relay K 2,5 pin correspondences are connected to normal-closed end 1 pin of relay K 1,4 pin, common port 2 pin of relay K 1, the corresponding via line incoming end of 5 pin LINE1-2 inserts test interface, Chang Kaiduan 3 pin of relay K 1,6 pin correspondences are connected to common port 2 pin of relay K 3,5 pin, normal-closed end 1 pin of relay K 3,4 pin are connected to the line insulation test unit, Chang Kaiduan 3 pin of relay K 3,6 pin correspondences are connected to common port 2 pin of relay K 4,5 pin, normal-closed end 1 pin of relay K 4,4 pin are connected to the line capacitance test cell, Chang Kaiduan 3 pin of relay K 4,6 pin are connected to circuit loop resistance test cell.

Described VDSL2 line tester, the serial ports commutation circuit adopts four bidirectional analog switches, the 1st pin of its A cell mesh links to each other with the 4th pin of C cell mesh, the 10th pin of its B cell mesh links to each other with the 9th pin of D cell mesh, receive the RS232 serial port of CPU then respectively as two lines of the public end of serial ports commutation circuit, the 2nd pin of four bidirectional analog switch A cell mesh and the 11st pin of B cell mesh are connected to the serial communication port end of DMM module as an output of serial ports commutation circuit, the 8th pin of D cell mesh and the 3rd pin of C cell mesh are connected to the serial communication port end of VDSL2 Modem module as another output of serial ports commutation circuit, control pin 13 pin of four bidirectional analog switch A cell mesh and control pin 12 pin of B cell mesh link to each other, receive on the I/O mouth of C4 of CPU, the 6th pin of D cell mesh links to each other with the 5th pin of C cell mesh, receives on the I/O mouth of C5 of CPU.

Described VDSL2 line tester, CPU are 32 ARM7 microprocessors.

Its operation principle is: circuit to be measured is linked into Digital Multi-Meter Test module and VDSL2 Modem test module through test interface.(1), when carrying out the VDSL2 parameter testing, the CPU control relay powers up for VDSL2 Modem module, starts this module work, VDSL2 Modem module by and the transmitting-receiving training of machine room local side apparatus, finish and activate link.The CPU module is set up the communication port of CPU module and VDSL2 Modem module serial ports by serial ports commutation circuit control pin GPC4, GPC5 (set 0,1), by the RS232 agreement, the physical layer parameter that this module is tested is sent to the CPU module, the CPU module is handled then, finishes the brilliant LCD of liquor charging and shows work.When (2) carrying out the DMM parameter testing, the CPU control relay powers up for the DMM module, start this module work, the CPU module is set up the communication port of CPU module and DMM module serial ports by serial ports commutation circuit control pin GPC4, GPC5 (set 1,0), by the RS232 agreement, CPU module controls DMM module is carried out the test job (as voltage tester, loop resistance test, capacity measurement, Insulation test etc.) of each project, this module is sent to the CPU module by the RS232 agreement with the data of being tested, handle by the CPU module then, finish the brilliant LCD of liquor charging and show work.

The utility model has following advantage compared with the prior art:

1, can carry out the parameter testing of VDSL2 business, also can self adaptation ADSL2+, ADSL, the different business of VDSL (DMT) tests, obtain each physical layer parameter information, simultaneously can carry out Digital Multi-Meter Test, parameters such as the voltage by measurement circuit, loop resistance, electric capacity, insulation are assessed the electrical characteristic of circuit, make test result more comprehensively and directly perceived.

2, can carry out the test of the variety of protocol of network layer,, verify the connectedness of network layer link as PPPoE dialing authentication (ppp protocol), Ping Test (ICMP agreement).

3, can carry out the copying of user VDSL2, ADSL2+, ADSL, VDSL (DMT) Modem fully, make things convenient for the user to carry out the fault location of Modem front and back, be the competent assistant that the telecommunications operator carries out service fulfillment and line upkeep.

4, it can self adaptation ADSL2+, ADSL, the different business of VDSL (DMT), DSL parameter by measurement circuit and DMM (Digital MultiMeter digital multimeter) parameter, comprehensively judge the quality and the fault of circuit.By PPP (Pointto Point, point-to-point) dialing, Network layer function such as Ping Test, verify the connectedness of network.

Description of drawings

Fig. 1 is a fundamental diagram of the present utility model;

Fig. 2 is the line map of RS232 serial ports commutation circuit embodiment;

Fig. 3 is the line map of the close beta unit of DMM module.

Embodiment

1, program storage 2, Installed System Memory 3, display 4, test interface 5, DMM module 6, VDSL2 Modem module 7, serial ports commutation circuit 8, keyboard 9, vdct unit 10, alternating voltage test cell 11, circuit loop resistance test cell 12, line capacitance test cell 13, line insulation test unit

In fundamental diagram shown in Figure 1: CPU adopts 32 ARM7 microprocessors, connect program storage 1 and Installed System Memory 2 through bus, address wire and chip select line, display 3 is connected to the liquid crystal control port of CPU, keyboard 8 is connected with CPU with the IO mouth by bus, the public end of serial ports commutation circuit 8 connects the RS232 serial port of CPU, two output connects DMM module 5 and VDSL2 Modem module 6 respectively, and the circuit of DMM module 5 and VDSL2 Modem module 6 inserts termination test interface 4.

In the embodiment shown in Figure 2: serial ports commutation circuit 8 adopts four bidirectional analog switches, the 1st pin of its A cell mesh links to each other with the 4th pin of C cell mesh, the 10th pin of its B cell mesh links to each other with the 9th pin of D cell mesh, receive the RS232 serial port of CPU then respectively as two lines of the public end of serial ports commutation circuit 8, the 2nd pin of four bidirectional analog switch A cell mesh and the 11st pin of B cell mesh are connected to the serial communication port end of DMM module 5 as an output of serial ports commutation circuit 8, the 8th pin of D cell mesh and the 3rd pin of C cell mesh are connected to the serial communication port end of VDSL2 Modem module 6 as another output of serial ports commutation circuit 8, control pin 13 pin of four bidirectional analog switch A cell mesh and control pin 12 pin of B cell mesh link to each other, receive on the I/O mouth of C4 of CPU, the 6th pin of D cell mesh links to each other with the 5th pin of C cell mesh, receives on the I/O of C5 of CPU.

In the embodiment shown in fig. 3: vdct unit 9 is connected to normal-closed end 1 pin of relay K 2,4 pin, alternating voltage test cell 10 is connected to Chang Kaiduan 3 pin of relay K 2,6 pin, common port 2 pin of relay K 2,5 pin correspondences are connected to normal-closed end 1 pin of relay K 1,4 pin, common port 2 pin of relay K 1, the corresponding via line incoming end of 5 pin LINE1-2 inserts test interface 4, Chang Kaiduan 3 pin of relay K 1,6 pin correspondences are connected to common port 2 pin of relay K 3,5 pin, normal-closed end 1 pin of relay K 3,4 pin are connected to line insulation test unit 13, Chang Kaiduan 3 pin of relay K 3,6 pin correspondences are connected to common port 2 pin of relay K 4,5 pin, normal-closed end 1 pin of relay K 4,4 pin are connected to line capacitance test cell 12, Chang Kaiduan 3 pin of relay K 4,6 pin are connected to circuit loop resistance test cell 11.

VDSL2 Modem and connection thereof involved in the utility model activates, signal amplifies, DSP concrete technology such as (data processing), being connected and using of CPU, program storage, Installed System Memory, keyboard and display also is known technology, so do not do detailed description.

Claims (5)

1, a kind of VDSL2 line tester, comprise program storage (1), Installed System Memory (2), CPU, display (3), test interface (4), DMM module (5) and VDSL2 Modem module (6), it is characterized in that: set up serial ports commutation circuit (7), its public end connects the RS232 serial port of CPU, two output connects DMM module (5) and VDSL2 Modem module (6) respectively, and the circuit of DMM module (5) and VDSL2 Modem module (6) inserts termination test interface (4).

2, VDSL2 line tester as claimed in claim 1, it is characterized in that: Digital Multi-Meter Test module (5) comprises relay K 1-4, vdct unit (9), alternating voltage test cell (10), circuit loop resistance test cell (11), line capacitance test cell (12) and line insulation test unit (13), wherein vdct unit (9) are connected to normal-closed end 1 pin of relay K 2,4 pin, alternating voltage test cell (10) is connected to Chang Kaiduan 3 pin of relay K 2,6 pin, common port 2 pin of relay K 2,5 pin correspondences are connected to normal-closed end 1 pin of relay K 1,4 pin, common port 2 pin of relay K 1, the corresponding via line incoming end of 5 pin LINE1-2 inserts test interface, Chang Kaiduan 3 pin of relay K 1,6 pin correspondences are connected to common port 2 pin of relay K 3,5 pin, normal-closed end 1 pin of relay K 3,4 pin are connected to line insulation test unit (13), Chang Kaiduan 3 pin of relay K 3,6 pin correspondences are connected to common port 2 pin of relay K 4,5 pin, normal-closed end 1 pin of relay K 4,4 pin are connected to line capacitance test cell (12), Chang Kaiduan 3 pin of relay K 4,6 pin are connected to circuit loop resistance test cell (11).

3, VDSL2 line tester as claimed in claim 1 is characterized in that: VDSL2 Modem module comprises DSP data processing unit, AFE front end analogue unit, ethernet circuit unit and power unit circuit.

4, VDSL2 line tester as claimed in claim 1, it is characterized in that: serial ports commutation circuit (7) adopts four bidirectional analog switches, the 1st pin of its A cell mesh links to each other with the 4th pin of C cell mesh, the 10th pin of its B cell mesh links to each other with the 9th pin of D cell mesh, receive the RS232 serial port of CPU then respectively as two lines of the public end of serial ports commutation circuit (7), the 2nd pin of four bidirectional analog switch A cell mesh and the 11st pin of B cell mesh are connected to the serial communication port end of DMM module (5) as an output of serial ports commutation circuit (7), the 8th pin of D cell mesh and the 3rd pin of C cell mesh are connected to the serial communication port end of VDSL2 Modem module (6) as another output of serial ports commutation circuit (7), control pin 13 pin of four bidirectional analog switch A cell mesh and control pin 12 pin of B cell mesh link to each other, receive on the I/O mouth of C4 of CPU, the 6th pin of D cell mesh links to each other with the 5th pin of C cell mesh, receives on the I/O mouth of C5 of CPU.

5, VDSL2 line tester as claimed in claim 1 is characterized in that: CPU is 32 ARM7 microprocessors.