CN1123195C - Automatic subscriber line and phone set testing card connected to access phone channel - Google Patents
Automatic subscriber line and phone set testing card connected to access phone channel Download PDFInfo
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- CN1123195C CN1123195C CN 98122233 CN98122233A CN1123195C CN 1123195 C CN1123195 C CN 1123195C CN 98122233 CN98122233 CN 98122233 CN 98122233 A CN98122233 A CN 98122233A CN 1123195 C CN1123195 C CN 1123195C
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- access network
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Abstract
The present invention relates to a user line, a user circuit and a telephone automatic test card of an access network telephone channel user. The telephone automatic test card is composed of a digital signal processing and periphery logic circuit, a high speed A/D circuit, a speech path for measuring, a user speech path, an SPI communication interface circuit, a serial communication circuit, etc. The present invention integrates main functions of an existing system test in a block of card, and realizes test functions of a complete external line, an internal line, a telephone and obstacle accurate positioning with access network interface communication. The card has the key technologies of external line test excitation and algorithm, high speed two-channel A/D sampling and DSP real-time analysis and process on DTMF dialing sound.
Description
The present invention relates to a kind of test card, particularly a kind of Access Network speech channel user's automatic test card.
Along with Access Network in nearly one or two years enters local telephone network and rural telephone network in a large number, the General Administration of Telecommunications has required the whole test functions of 112 systems increase to user of access network.Because of Access Network is few at certain regional customer volume, it is unacceptable using the system testing head (about 100,000 RMB of price) at large-scale stored-program control exchange.How solving the Access Network test problem cost-effectively is each Access Network producer questions of common interest.
The specification requirement of General Administration of Telecommunications's butt joint network access testing is also informal finalizes a text.In present draft, only test event has been done certain requirement, do not stipulate concrete implementation method.Existing measuring technology is divided following several basically:
1, adopts external instrument, with artificial method test.
2, the test bus with the Access Network remote end module causes end office (EO) with the method that hard connection or logic connect, and utilizes the measuring head of end office (EO) to test.
3, developing certain embedded testing equipment voluntarily by Access Network manufacturer tests automatically.
Said method all has the defective that is difficult to overcome:
1, manual testing's method waste of manpower, time, obviously can not adapt to the requirement about automatic test of the General Administration of Telecommunications.
Solve the problem of automatic test though 2, the test bus of Access Network remote end module is caused the head of estimating of end office (EO), brought following problem:
A, no matter be to connect or method that logic connects with hard, the signal on the test bus is transferred to the decline that end office's (transmission range reaches more than ten kilometers usually) must cause measuring accuracy.
B, the transmission equipment that needs are expensive increase considerably cost.
C, need carry out software and hardware to end office's measuring head of long-time running and change, increase the unsteadiness factor.
3, embedding testing equipment at the Access Network far-end is rational selection, but there is two large problems in present existing embedded device:
A, since Access Network manufacturer subscriber line test is unfamiliar with, the functions of the equipments that develop are incomplete, and measuring accuracy is not high.
B, this embeds testing equipment only at specific Access Network manufacturer, and interface is nonstandard, is unfavorable for the maintenance management of office side.
The object of the present invention is to provide a kind of powerful, advanced design, test speed fast, accurately, ratio of performance to price height can be successfully and solve the Access Network speech channel user's of Access Network test problem automatic test card economically.
Purpose of the present invention can reach by following measure: the present invention includes outer reason of digital signal and peripheral logical circuit, test control circuit, the high-speed a/d circuit, measure and use voice pathway, the user speech path, the SPI communication interface circuit, serial communication circuit, Digital Signal Processing and peripheral logical circuit and measurement voice pathway, the user speech path, the SPI communication interface circuit, serial communication circuit links to each other, test control circuit is delivered in the output of Digital Signal Processing and peripheral logical circuit, Digital Signal Processing and peripheral logical circuit are delivered in the output of high-speed a/d circuit, SPI communication interface circuit (6) and serial communication circuit (7) can be realized and the access network equipment communication interface, and provide the remote testing interface, pass through communication interface, test card acceptance test order, send test result, Digital Signal Processing and peripheral logical circuit (1) are responsible for the testing algorithm analysis, testing process control, with communicating by letter of Access Network interface and remote interface, comprise audio frequency, the double-tone oscillometry, the high order curve approximate analysis, also adopt extensive programmable gate array in addition, realize logic control, comprise the sampling of control high-speed a/d, test circuit, test control circuit (2) comprises test and excitation control high-speed a/d sample circuit (3), and have a plurality of ranges, the needs that adapt to wide-range in actual the use, measure and to monitor with voice pathway (4) and user speech path (7), insert, send buzz, and realize mutual between test desk and the tested user.
The object of the invention can also reach by following measure: adopt dsp chip TMS302F206 in Digital Signal Processing and the peripheral logical circuit.
The present invention has following advantage compared to existing technology:
1, complete function, precision height, stable and reliable for performance, volume is little, and little power consumption is cheap, helps applying.
2, owing to have a platform-neutral, make and estimate card and Access Network is relatively independent, help both sides' technology innovation, and help user's maintenance management.
Fig. 1 is a functional-block diagram of the present invention;
Fig. 2 is the connection diagram of the present invention and Access Network;
Fig. 3 is the software architecture diagram of test card;
Fig. 4 is for the user's communication high resistant is monitored, conversation intrusion schematic diagram.
The present invention is described in further detail below in conjunction with accompanying drawing (embodiment):
With reference to Fig. 1, the present invention by Digital Signal Processing and peripheral logical circuit 1, test control circuit 2, high-speed a/d circuit 3, measure and form with voice pathway 4, user speech path 5, SPI communication interface circuit 6, serial communication circuit 7 etc.The present invention adopts Digital Signal Processing (DSP), programmable gate array (FPGA), high-speed a/d Sampling techniques.SPI communication interface circuit 6 and serial communication circuit 7 can realize and the access network equipment communication interface, and the remote testing interface is provided, and by communication interface, test card acceptance test order sends test result.Digital signal place (DSP) be responsible for the control of testing algorithm analysis, testing process, with the communicating by letter of Access Network interface and remote interface, comprise audio frequency, dual-tone multifrequency analysis, high order curve approximate analysis etc.Utilize the powerful processing capacity of DSP, can satisfy test function comprehensively and require and the Future Development needs.Also adopt extensive programmable gate array in addition, realize logic control, mainly comprise the sampling of control high-speed a/d, test circuit, can be integrated in the logic control function on the chip piece.Test circuit comprises test and excitation, high-speed a/d sample circuit, and has a plurality of ranges, adapts to the needs of wide-range in actual the use.Multiple functions such as buzz can be realized monitoring, be inserted, send to the speech interface circuit, and realize mutual between test desk and the tested user.
With reference to Fig. 2, this test card 14 can directly insert in the Access Network remote equipment machine frame 8, in racks of coexistence such as user's plate 9, control board 10, account for a groove position, by Access Network 13, the channel that optical fiber 12 provides can be surveyed user of access network, simultaneously at switch end 11, the present invention also can provide system remote interface 15, can directly link to each other with system by this interface.
The software configuration of test card is seen Fig. 3.
Hardware drive module: control hardware action, provide flexile test and excitation,
Data acquisition.
Data analysis module: to the digital filtering of the The data complexity of gathering, curve is forced
Closely, use suitable mathematical model and carry out analyzing and processing.
Serial communication module mainly is responsible for transmission and the reception with Access Network serial communication bag.
Testing control module is responsible for whole test card flow process control.
All software is implemented on the DSP.Because of the test function item is many, the algorithm complexity has adopted modular construction, uses the C Programming with Pascal Language.Consider that from speed, the program space angle part key code has adopted the assembler language programming.
The systemic-function general introduction:
The Loop test function:
At this moment, Access Network far-end control appliance should be grabbed user outline, and gives one of row order to test card:
(1) integration test:
Test card returns the result and the ten binomial parameter indexs of Loop test, and fixed
The property judged result:
Normal 1 line insulation of 0 test result is bad
The 3 circuit swinging cross of breaking of 2 circuits
The 5 circuit crosstalks of 4 circuit ground vapour
6 line electrical leakages, 7 phones do not hang up properly
When circuit broken string or swinging cross, also return the fault point distance.
The Internal Line Test function:
At this moment, Access Network far-end control appliance should be grabbed the user interior lines, and gives one of row order to test card:
(1) integration test:
Test card returns the Internal Line Test result, and project has: feed, dialing tone,
Loop current, fat dash collect the digits, audio frequency collects the digits:
(2) interior lines ringing test:
At this moment, switch is given user interior lines ringing-signal feeding, and test card returns the ringing test result, comprising: ringing-current exists not, and floating voltage can not stop when the dynamo-electric pressure of answering and simulation off-hook.
(3) single ringing-current voltage of surveying;
Condition is ordered similar to last, different is ringing-current voltage when this moment, test card only returned zero load.
Voice channel is set up
As need one user who is conversing is monitored, inserts, puts the machine test, need set up a voice channel earlier.Test card has an analog voice interface, and this speech interface connects ordinary telephone subscriber, and known number.The fixed telephone number that the surveyor is artificial at test desk or the auto-dial testing examination blocks, test card detects because of after dialing the ringing signal that this telephone number sends here, test card internal simulation off-hook, thereby set up the voice channel of surveyor to test card, test card is inner to link to each other voice channel in logic with test bus, set up the surveyor like this and can monitor, insert the user's voice passage of conversing.
With reference to Fig. 4, establish user A and user B converses, the measuring center test desk test subscriber A of office.
The party A-subscriber is busy, and this moment, test desk such as need high resistant were monitored, and then Access Network should be able to link to each other with user A by test bus (outside line).Test desk can be by dialling test card voice channel (numeral or simulation) interface telephone number, set up the voice channel of test desk phone and test card, set up voice channel is connected with the voice of test bus in test card inside, set up a voice channel like this between test desk and the user A, it is unidirectional that the control of test card in house software becomes voice channel, is monitoring this moment.
It is two-way that software control makes voice channel, and be conversation and toll breakdown this moment.
Voice channel is set up process:
(1) Access Network far-end control appliance is connected to the test bus outside line to tested user.
(2) test desk is dialled the particular telephone number that test card connects.
(3) Access Network far-end control appliance is sent out monitoring or is inserted order and give test card.
(4) after test card detects ringing-current, set up test desk → test card → test bus → tested user's voice passage, if monitor, then test card inside forms half-duplex channel, whether and can send prompt tone to notify the user before monitoring according to order request: if insert, then surveyor and tested user can converse mutually.
(5) test card sends out the response of having set up monitoring or insertion for Access Network far-end control appliance.
(6) Access Network far-end control appliance is sent out the order that ends task.
(7) test card is sent out the response of successful execution order.
In addition, the user that dialogue machine does not hang up properly, test card can be sent howler tone
(being howler tone).
This function comprises following order:
(1) monitor, insert order:
This order controllable testing card is set up unidirectional or the double-directional speech passage, and whether notifies the user.
(2) change monitoring, the insertion state:
This order controllable testing card changes arbitrarily to be monitored or the insertion state.
(3) end to monitor, insert order:
This order controllable testing card stops monitoring or the insertion state.
(4) send the howler tone order:
This order control test card is sent the howler tone of length controlled, returns whether on-hook in official hour of user.The phone test: the main purpose of phone test is to detect the dialing performance of substation, and step is as follows:
(1) Access Network far-end control appliance is connected to the test bus outside line to tested user.
(2) test desk is dialled the particular telephone number that test card connects.
(3) Access Network far-end control appliance is sent out the ring user command to test card.
(4) after detecting user's off-hook, Access Network far-end control appliance is sent out the dialing sense command to test card.
(5) surveyor points out subscriber dialing, and whether testing result is correct then.
(6) Access Network far-end control appliance is sent out the order that ends task.
(7) test card is sent out the response of successful execution order.Available order is as follows:
(1) substation state verification order:
Test card returns whether on-hook of user.
(2) ring user command:
This order control test card is sent the ring back tone of length controlled, returns whether off-hook in official hour of user.
(3) dialing sense command:
Whenever the user dials once number or on-hook, test card returns a piece of news, comprises dial type (dual-tone multifrequency or pulse or on-hook), and number value, and the specifying information of dialing comprise:
(1) the height frequency and the level thereof of dual-tone multifrequency.
(2) pulse length of pulse dialing and break-make ratio.
(4) end the phone test command:
This order controllable testing card stops the phone test mode.
The key technical indexes:
The user outline characteristic test:
User outline is tested ten binomial outside line parameter indexs, and judges outside line qualitative test result according to the quantitative values of parameter.
A) resistance (A-B, A-G, B-G)
Measuring range: 10 Ω～10M Ω
Measure error: ± 2% ± 1 Ω (10 Ω～1M Ω) ± 10% (1M Ω～10M Ω)
B) electric capacity (A-B, A-G, B-G)
Measuring range: 0.001 μ F～10 μ F
Measure error: ± 2% ± 0.0001 μ F (0.001 μ F～1.0 μ F) ± 10% (1.0 μ F～10.0 μ F)
C) alternating voltage (A-B, A-G, B-G)
Measuring range: 0.1～500VRMS
Measure error: ± 2%
D) direct voltage (A-B, A-G, B-G)
Measuring range: 0.1～500V
Measure error: ± 2%
The subscriber line circuit test
The subscriber line circuit test is meant the test subscriber interior lines, and whether main test loop electric current, feed voltage, dialing tone normally reach concrete quantitative parameter value; Can test receive normal Pulse Dialing, the dual-tone multifrequency number of sending out.
A) loop current (A-B)
Measuring range: 1.0～100mA
Measure error: ± 2%
B) feed voltage
Measuring range: 0.1～100V
Measure error: ± 2%
C) dialing tone
The dialing tone of sending as switch satisfies following condition, and then the dialing tone test result is normal.
Frequency: 450Hz ± 2Hz
Level :-10 ± 3dbm
D) Pulse Dialing
Break-make ratio: (1.6 ± 0.2): 1
Impulse speed: 10 ± 1pps
Send out number interval:＞500ms
E) the dual-tone multifrequency number of sending out
Frequency deviation: ± 1.5%
Level:
Low frequency group :-9 ± 3dBM
High frequency group :-7 ± 3dBM
Two-frequency signal level difference: 2 ± 1dB
Total distortion: than the low 20dB of first-harmonic level
Pickup electrode limit:＞40ms/ position
Sigtnal interval duration:＞40ms
Subscriber equipment (phone) test:
Whether the pulse of test subscriber's phone, DTMF pulsing be normal.
A) pulse phone and DC pulse button (DP) phone test
A, dial speed (standard 10PPS)
Measuring range: 5PPS～22PPS
Permissible error: 0.5PPS
B, continuation are than (standard 1.6: 1)
Measuring range: (1.0～3.0): 1
Permissible error: ± 0.1
B) Dual Tone Multifrequency phone test
A, frequency (standard: low frequency group 697,770,852,941Hz, high frequency group 1209,1336,1477,1633Hz, frequency deviation ± 1.5%)
Measuring range: 300Hz～3400Hz
Permissible error: ± 1.5%
C, level (standard: low frequency group-9 ± 3dBM, high frequency group-7 ± 3dBM, double frequency letter
Number level difference is not more than 2 ± 1d)
Measuring range :-24dBM～0dBM (single-frequency)
Permissible error: 1dBM
The qualitative judgement ability:
(1) fault test accuracy rate 〉=98%
Its interrupt line, swinging cross, ground connection, short circuit, bump ground obstacle accuracy rate 100% other obstacle accuracy rate 〉=95%
(2) fault is accurately located:
A) fault location blind area≤20 meter
B) fault location point tolerance ± 20 meter
Claims (2)
1, a kind of Access Network speech channel user's automatic test card, it is characterized in that: comprise outer reason of digital signal and peripheral logical circuit (1), test control circuit (2), high-speed a/d circuit (3), measure with voice pathway (4), user speech path (5), SPI communication interface circuit (6), serial communication circuit (7), Digital Signal Processing and peripheral logical circuit (1) and measurement voice pathway (4), user speech path (5), SPI communication interface circuit (6), serial communication circuit (7) links to each other, test control circuit (2) is delivered in the output of Digital Signal Processing and peripheral logical circuit (1), Digital Signal Processing and peripheral logical circuit (1) are delivered in the output of high-speed a/d circuit (3), SPI communication interface circuit (6) and serial communication circuit (7) can be realized and the access network equipment communication interface, and provide the remote testing interface, pass through communication interface, test card acceptance test order, send test result, Digital Signal Processing and peripheral logical circuit (1) are responsible for the testing algorithm analysis, testing process control, with communicating by letter of Access Network interface and remote interface, comprise audio frequency, the double-tone oscillometry, the high order curve approximate analysis, also adopt extensive programmable gate array in addition, realize logic control, comprise the sampling of control high-speed a/d, test circuit, test control circuit (2) comprises test and excitation control high-speed a/d sample circuit (3), and have a plurality of ranges, the needs that adapt to wide-range in actual the use, measure and to monitor with voice pathway (4) and user speech path (7), insert, send buzz, and realize mutual between test desk and the tested user.
2, test card according to claim 1 is characterized in that: adopt dsp chip TMS302F206 in Digital Signal Processing and the peripheral logical circuit (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98122233 CN1123195C (en) | 1998-12-04 | 1998-12-04 | Automatic subscriber line and phone set testing card connected to access phone channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98122233 CN1123195C (en) | 1998-12-04 | 1998-12-04 | Automatic subscriber line and phone set testing card connected to access phone channel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1256573A CN1256573A (en) | 2000-06-14 |
| CN1123195C true CN1123195C (en) | 2003-10-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98122233 Expired - Fee Related CN1123195C (en) | 1998-12-04 | 1998-12-04 | Automatic subscriber line and phone set testing card connected to access phone channel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1123195C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101170322B (en) * | 2007-12-10 | 2012-07-25 | 烽火通信科技股份有限公司 | User line and user circuit testing system and method |
| CN101345796B (en) * | 2008-08-19 | 2012-04-25 | 烽火通信科技股份有限公司 | Soft exchange user line intelligent test system and method based on user line test module |
| CN104394282B (en) * | 2014-11-14 | 2017-10-10 | 深圳市共进电子股份有限公司 | The method of testing and system of a kind of network voice communication |
-
1998
- 1998-12-04 CN CN 98122233 patent/CN1123195C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1256573A (en) | 2000-06-14 |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
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| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20031001 Termination date: 20100104 |