CN102412895B - Centralized monitoring method for optical cable resource - Google Patents
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- CN102412895B CN102412895B CN201110376085.XA CN201110376085A CN102412895B CN 102412895 B CN102412895 B CN 102412895B CN 201110376085 A CN201110376085 A CN 201110376085A CN 102412895 B CN102412895 B CN 102412895B
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 210
- 230000003287 optical effect Effects 0.000 title claims abstract description 145
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000012360 testing method Methods 0.000 claims abstract description 30
- 230000000737 periodic effect Effects 0.000 claims abstract description 25
- 238000004891 communication Methods 0.000 claims abstract description 20
- 238000012423 maintenance Methods 0.000 claims abstract description 7
- 239000000835 fiber Substances 0.000 claims description 38
- 239000013307 optical fiber Substances 0.000 claims description 17
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000004888 barrier function Effects 0.000 abstract 2
- 230000005540 biological transmission Effects 0.000 description 6
- 238000007726 management method Methods 0.000 description 5
- 238000009666 routine test Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000000253 optical time-domain reflectometry Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a centralized monitoring method for the optical cable resource. The method comprises the following steps of: 1, establishing an optical cable section; 2, establishing optical routing; 3, forming optical cable network topology; 4, setting a monitoring module for a network; 5, selecting a monitoring mode, skipping to a step 5.1 in a roll-call monitoring mode, skipping to a step 5.2 in an automatic periodic monitoring mode, and skipping to a step 5.3 in a barrier alarm monitoring mode; 5.1, performing roll-call monitoring at the optical cable section; 5.2, automatically and periodically monitoring the optical cable section; 5.3, performing barrier alarm monitoring at the optical cable section; 6, monitoring central analysis testing data, judging whether a fault occurs, skipping to a step 7 if the fault occurs, and skipping to the step 5 if no fault occurs; 7, assigning a person to maintain the failed optical cable section; and 8, monitoring the maintained optical cable section by using the monitoring module, and skipping to the step 5. In the method, online monitoring, analysis and real-time fault alarm are performed on a communication optical cable and communication equipment, so that the line communication and maintenance efficiencies are increased, the line failure rate is lowered, and the fault time is shortened.
Description
Technical field
The present invention relates to a kind of optical survey technology, be specifically related to a kind of centralized monitoring method for optical cable resource.
Background technology
Optical fiber communication has a series of superiority in transmission range, transmission rate and stability etc., and its application is deep into national economy and each field of daily life day by day, becomes indispensable link.Because optical fiber is physical bodies, itself has the life problems of performance degradation, adds the impact of all kinds of contingency, and optical cable is damaged, and interrupts or impact communication.Therefore, effectively predict cable variation trend, to judge and process fiber failure has seemed even more important in time, become the fault time reducing optical cable and improved communication quality, ensure electric power netting safe running, increased the important means running income.
A large amount of optical cable all starts to build and lay from early 1990s, due to the also factors such as imperfection of production technology at that time, its optical fiber quality (comprising transmission window and speed etc.) and life-span all can be not enough to some extent, therefore, it successively enters the deterioration phase, needs to strengthen the monitoring to it, management.But under the prior art, maintenance, the management team of optical cable will be very huge, and its shortcoming is apparent.
At present, the detection method of prior art is at ODF(fibre distribution frame by technical staff, Optical Distribution Frame) frame first searches out tested optical cable, use OTDR(optical time domain reflectometer again, Optical Time Domain Reflectometer) test this its, and then by manually carrying out gathering and analyzing.
Though also use OTDR when adopting manual testing, also can to localization of fault, the fine length of bending and reserved at places such as hoistways dish when laying because optical cable is actual, makes the location of this fault accurate not, have impact on repairing speed.
Also adopt a kind of supervisory control system of cable in prior art, this system is a simple resource record system, and the interlock of shortage and automatic test equipment, does not more possess the scheduling feature of maintenance.Certain route spot fault can be found, but cannot quantitatively and localizing faults scene by existing fibre optic transmission equipment, will inevitably delay faults process opportunity, cause larger economic loss; Utilize communication equipment to detect simultaneously and also do not possess forecast function, strong support cannot be provided for optical cable planning.Optical cable, as a kind of passive transmission medium, not yet develops self detection alarm function at present, and the state condition of external system to it can only be relied on to monitor and manage.
Meanwhile, because traditional maintenance management is based on written, cannot store at computer system memory, cause various form, data accumulates over a long period and huge, check, contrast is all very inconvenient.In addition because construction and use are different units or department, the data of collection in tested tissue and examination may have different, leave defect to the optical cable state variation analytical work in later stage and renewal plan.
Summary of the invention
The invention provides a kind of centralized monitoring method for optical cable resource, improve line traffic efficiency and line upkeep efficiency, reduce line failure rate and line fault time.
For achieving the above object, the invention provides a kind of centralized monitoring method for optical cable resource, the method includes the steps of:
Step 1, optical cable segment are set up;
Step 1.1, boundary mark are set up;
Be associated between step 1.2, boundary mark;
Step 1.3, optical cable segment are newly-built and generate fibre core;
Step 1.4, to be set up by the user of fiber optic communications and fiber optic communications equipment thereof;
The splicing point of step 1.5, optical cable segment generates;
Step 2, optical routing are set up;
The starting point boundary mark of step 2.1, Surveillance center selective light route in GIS-Geographic Information System;
Step 2.2, GIS-Geographic Information System search the optical cable segment and untapped fibre core thereof of appearing this point;
Step 2.3, Surveillance center choose a fibre core of certain optical cable segment;
Step 2.4, GIS-Geographic Information System find out and with the optical cable segment selecting fibre core to connect into optical routing, can judge whether the optical cable segment not connecting into fiber cable network, if so, then jump to step 2.3, if not, then jump to step 2.5;
Step 2.5, Surveillance center select fibre core complete and preserve this information;
Step 3, optical cable segment and optical routing form fiber cable network topology;
In step 4, fiber cable network topology, monitoring modular is set;
Step 5, Surveillance center are monitored optical cable segment by monitoring modular, and select monitoring pattern, if roll-call monitoring pattern, then jump to step 5.1, if automatic periodic monitoring pattern, then jump to step 5.2, if trouble alarm monitoring pattern, then jump to step 5.3;
Step 5.1, Surveillance center carry out roll-call monitoring to optical cable segment;
Step 5.1.1, Surveillance center's instruction start monitoring;
Step 5.1.2, Surveillance center select to carry out the monitoring station of monitoring and optical routing;
Step 5.1.3, Surveillance center judge whether the parameterized template of monitoring to some extent, if so, then jump to step 5.1.5, if not, then jump to step 5.1.4;
Step 5.1.4, Surveillance center arrange the parameter of monitoring;
Step 5.1.5, Surveillance center send Monitoring instruction to selected monitoring station;
Step 5.1.6, monitoring station send Monitoring instruction to monitoring modular and monitor optical routing inner fiber;
Step 5.1.7, monitoring station receive monitoring result, are sent to Surveillance center, and Surveillance center receives monitoring result, based on monitoring result formation curve file;
Step 5.2, Surveillance center carry out automatic periodic monitoring to optical cable segment;
Step 5.2.1, Surveillance center are to the monitoring station setting periodic monitoring time;
Step 5.2.1.1, Surveillance center select setting the periodic monitoring time monitoring station and under optical routing;
Step 5.2.1.2, Surveillance center's setting periodic monitoring time;
Step 5.2.1.3, Surveillance center send the director data of periodic monitoring time to monitoring station;
Step 5.2.2, monitoring station judge whether the periodic monitoring time, if so, then jump to step 5.2.3, if not, then jump to step 5.2.2;
Step 5.2.3, monitoring station control monitoring modular and monitor optical fiber and receive Monitoring Data;
Step 5.2.4, monitoring station receive monitoring result, are sent to Surveillance center;
Step 5.3, Surveillance center carry out trouble alarm monitoring to optical cable segment;
The performance number of step 5.3.1, monitoring modular Real-time Collection each road optical fiber;
The Monitoring Data of step 5.3.2, monitoring station timing reading monitoring module;
Monitoring Data compares with alarming threshold value by step 5.3.3, monitoring station, judges whether to produce alarm, if so, then jumps to step 5.3.4, if not, then jumps to step 5.3.2;
Step 5.3.4, monitoring station transmitting optical power data are to Surveillance center;
The information of step 5.3.5, monitoring station inquiry optical routing, starts obstacle test;
Step 5.3.6, monitoring station analyzing test data, judge whether to need alarm, if then warning information is sent to Surveillance center, and jumps to step 5.3.7, if not, then jumps to step 5.3.5;
Step 5.3.7, Surveillance center send warning information;
Step 6, Surveillance center's analyzing test data, and judged whether that optical cable segment breaks down, if so, then jump to step 7, then jump to step 5 if not;
Step 7, Surveillance center send work to be safeguarded fault optical cable segment;
Step 8, monitoring module monitors have completed the optical cable segment of maintenance, and jump to step 5.
Centralized monitoring method for optical cable resource of the present invention is compared with the optical survey mode of prior art, its advantage is, the present invention is to around the management of a series of engineerings of communications optical cable, equipment, unit and whole fiber cable network implementation information, and on this basis on-line monitoring is implemented to communications optical cable, communication equipment, real time fail alarm, instant performance prediction, there is powerful data management function and path monitoring mode that is perfect, science, improve line traffic efficiency and line upkeep efficiency, reduce line failure rate and line fault time.
Accompanying drawing explanation
Fig. 1 is the structural representation of the cable resource centralized monitoring system that centralized monitoring method for optical cable resource of the present invention is suitable for;
Fig. 2 is total method flow diagram of centralized monitoring method for optical cable resource of the present invention;
Fig. 3 is the flow chart setting up optical cable segment of centralized monitoring method for optical cable resource of the present invention;
Fig. 4 is the flow chart setting up optical routing of centralized monitoring method for optical cable resource of the present invention;
Fig. 5 is the flow chart of the roll-call monitoring of centralized monitoring method for optical cable resource of the present invention;
Fig. 6 is the flow chart of the automatic periodic monitoring of centralized monitoring method for optical cable resource of the present invention;
Fig. 7 is the flow chart of the setting periodic monitoring time of centralized monitoring method for optical cable resource of the present invention;
Fig. 8 is the flow chart of the trouble alarm monitoring of centralized monitoring method for optical cable resource of the present invention.
Embodiment
Embodiments of the invention are illustrated below in conjunction with accompanying drawing.
As shown in Figure 1, centralized monitoring method for optical cable resource of the present invention a kind of embodiment of cable resource centralized monitoring system of being suitable for.System in this embodiment comprises a provincial or city-level monitoring center PMC, connect under a provincial or city-level monitoring center PMC and monitored 1 to 32 local level monitoring center LMC, connect under each local level monitoring center LMC and monitored 1 to 32 monitoring station MS, and connect under the MS of each monitoring station and monitor 16*2 monitoring modular, connect under each monitoring modular and detect 32 optical routings, connect under every bar optical routing and monitor 1 to 8 section of optical fiber, such power system capacity configuration is maximum can be reached: 32*32*16*32*8=4194304(root) optical fiber.
The system equipment of provincial or city-level monitoring center PMC and local level monitoring center LMC substantially roughly the same, form primarily of following equipment: database server, monitoring management terminal, the communication server (front end processor), router (between PMC and LMC), data sheet printer, HUB(hub) etc., software section can be configured on distinct device or an equipment according to actual scale.To the information resources of monitoring be needed to be input in system by terminal in this system, and these parameters are issued to each monitoring station MS, each monitoring station MS can carry out this locality monitoring to optical cable by its lower monitoring modular.Monitoring station MS is communicated with monitoring modular by 422 data wires.The instruction that monitoring modular is subject to monitoring station MS is monitored circuit (mainly optical routing) or is tested, and the information of optical fiber each point inside optical routing is turned back to monitoring station MS, and upload to provincial or city-level monitoring center PMC and local level monitoring center LMC step by step by monitoring station MS.
PMC, LMC, MS station is interconnected by DCN, DDN, PSTN network.Monitoring station MS and monitoring modular are arranged in same frame, are connected by data wire.Monitoring modular is directly connected by light path with optical routing and optical fiber.
The utility model discloses a kind of centralized monitoring method for optical cable resource, as shown in Figure 1, the method includes the steps of:
Step 1, as shown in Figure 3, optical cable segment is set up, and newly-built optical cable segment is one section of physical optical normally, and it runs through the boundary mark such as Ren Jing, pole line, connects the equipment such as light fiber-dividing box, Optical cross connects case, ODF, and the administrative unit such as machine room, institute of office.
Step 1.1, boundary mark are set up, and set up region, institute of foundation office successively, set up machine room, set up people's well, set up the boundary mark that optical fiber is laid in pole line etc.
Be associated between step 1.2, each boundary mark.
Step 1.3, optical cable segment are newly-built, and generate the fibre core of optical fiber.
Step 1.4, to be set up by the user of fiber optic communications and fiber optic communications equipment thereof, such as, set up A end subscriber and the B end subscriber that connect communication at 2, and set up its respective A and hold equipment and B section equipment.
The splicing point of step 1.5, optical cable segment generates.
The layer data upload of the optical cable segment established is preserved to Surveillance center.
Step 2, as shown in Figure 4, optical routing is set up, newly-built optical routing-according to practical communication situation, based on the optical cable segment be connected by equipment, connecting numerous fibre cores and become optical routing, is the Main Resources data that path monitoring part is used.
The starting point boundary mark of step 2.1, Surveillance center's selective light route in GIS-Geographic Information System (GIS), each boundary mark of this boundary mark for setting up in step 1.
Step 2.2, GIS-Geographic Information System search the optical cable segment and untapped fibre core thereof of appearing this point.
Step 2.3, Surveillance center choose a fibre core of certain optical cable segment.
Step 2.4, GIS-Geographic Information System find out and with the optical cable segment selecting fibre core to connect into optical routing, can judge whether the optical cable segment not connecting into fiber cable network in addition, if so, then jump to step 2.3, if not, then jump to step 2.5.
Step 2.5, Surveillance center select fibre core complete and preserve this information.
Step 3, optical cable segment and optical routing form fiber cable network topology, and its structure as shown in Figure 1.
In step 4, fiber cable network topology, monitoring modular is set.
Step 5, Surveillance center are monitored optical cable segment by monitoring modular, and select monitoring pattern, if roll-call monitoring pattern, then jump to step 5.1, if automatic periodic monitoring pattern, then jump to step 5.2, if trouble alarm monitoring pattern, then jump to step 5.3.
Path monitoring is exactly that Surveillance center MC drives monitoring station MS to test appointment optical routing by communicating terminal, or monitoring station self-timing is tested appointment optical routing, pass through communicating terminal information upload again to Surveillance center, Surveillance center analyzes information upload, thus generation sends work safeguard or carry out performance prediction to communications optical cable, implements good monitoring performance.
Step 5.1, as shown in Figure 5, Surveillance center (provincial or city-level monitoring center PMC or local level monitoring center LMC) carries out roll-call monitoring to optical cable segment.
Test of calling the roll is according to instant needs, the user of Surveillance center sets the parameters such as range, pulsewidth, backscattering coefficient, Optimizing Mode by manual, given an order by the monitoring station MS of communicating terminal to place, namely this optical routing is tested after the response of monitoring station, test rear survey station and return the data center of test curve file to Surveillance center, Surveillance center draws out test curve according to file, and user can analyze this curve, thus realizes the testing and analyzing to target lightguide cable link.
Step 5.1.1, Surveillance center's instruction start monitoring.
Step 5.1.2, Surveillance center select to carry out the monitoring station MS that monitors and optical routing.
Step 5.1.3, Surveillance center judge whether the parameterized template will monitored to some extent, if so, then jump to step 5.1.5, if not, then jump to step 5.1.4.
Step 5.1.4, Surveillance center arrange the parameter of monitoring, and the parameter that test comprises testing range, test pulsewidth, test wavelength, equalization number of times and group index.
Step 5.1.5, Surveillance center send Monitoring instruction to selected monitoring station MS by its communicating terminal.
Step 5.1.6, monitoring station MS send Monitoring instruction to monitoring modular and monitor optical routing inner fiber.
Step 5.1.7, monitoring station MS receive monitoring result, are sent to Surveillance center.Surveillance center receives monitoring result, based on monitoring result formation curve file.
Step 5.2, as shown in Figure 6, Surveillance center carries out automatic periodic monitoring to optical cable segment.
Routine test be user according to safeguarding needs, to every bar optical system for testing by arranging independently routine test parameter, the cycle, unit can from minute to day, the moon, year.After routine test terminates, automatically comparing by measured curve and reference curve, when exceeding the thresholding of setting, namely producing alarm signal.Routine test can the transmission quality of long-term follow circuit, can the problem such as Timeliness coverage optical fiber quality deterioration.According to the test period arranged, system automatically over the ground optical routing carry out periodic cycle test, automatic decision test result, find abnormally namely to send alarm signal.
Step 5.2.1, as shown in Figure 7, Surveillance center sets the periodic monitoring time to monitoring station MS.
Step 5.2.1.1, Surveillance center select setting the periodic monitoring time monitoring station MS and under optical routing.
Step 5.2.1.2, Surveillance center's setting periodic monitoring time.
Step 5.2.1.3, Surveillance center send the director data of periodic monitoring time to monitoring station MS.
Step 5.2.2, monitoring station judge whether the periodic monitoring time, if so, then jump to step 5.2.3, if not, then jump to step 5.2.2.
Step 5.2.3, monitoring station MS control monitoring modular and monitor optical fiber and receive Monitoring Data.
Step 5.2.4, monitoring station MS receive monitoring result, are sent to Surveillance center.
Step 5.3, as shown in Figure 8, Surveillance center carries out trouble alarm monitoring to optical cable segment.
A light power monitoring measuring unit has multichannel input interface, can access multifiber.Light power monitoring measuring unit is to carrying out Real-Time Monitoring by the situation of change of monitored optical fiber power, MS station this optical power value of timing acquiring also compares with threshold value, as found, it is lower than threshold value, namely send alarm, and alarm data is uploaded, stop ongoing routine test and test of calling the roll simultaneously, with the highest priority, the fastest speed, starts optical time domain reflectometer OTDR and tests this optical routing, then test data uploaded control center MC.
Optical power monitoring is carried out automatically by system, and user only needs to arrange optical power alarming threshold value.
Surveillance center, first according to luminous power parameter request required under optical cable normal operating conditions, presets optical power alarming threshold value.
The performance number of step 5.3.1, monitoring modular Real-time Collection each road optical fiber.
The Monitoring Data of step 5.3.2, monitoring station MS timing reading monitoring module.
Monitoring Data compares with alarming threshold value by step 5.3.3, monitoring station MS, judges whether to produce alarm, if so, then jumps to step 5.3.4, if not, then jumps to step 5.3.2.
Step 5.3.4, monitoring station MS transmitting optical power data are to Surveillance center.
Step 5.3.5, monitoring station MS inquire about the information of optical routing, start obstacle test.
Step 5.3.6, monitoring station analyzing test data, judge whether to need alarm, if then warning information is sent to Surveillance center, and jumps to step 5.3.7, if not, then jumps to step 5.3.5.
Step 5.3.7, Surveillance center send warning information.
Step 6, Surveillance center's analyzing test data, and judged whether that optical cable segment breaks down, if so, then jump to step 7, then jump to step 5 if not and continue monitoring.
Step 7, Surveillance center send work to be safeguarded fault optical cable segment.
Step 8, monitoring module monitors have completed the optical cable segment of maintenance, and jump to step 5.
Although content of the present invention has done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple amendment of the present invention and substitute will be all apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (1)
1. a centralized monitoring method for optical cable resource, is characterized in that, the method includes the steps of:
Step 1, optical cable segment are set up;
Step 1.1, boundary mark are set up;
Be associated between step 1.2, boundary mark;
Step 1.3, optical cable segment are newly-built and generate fibre core;
Step 1.4, to be set up by the user of fiber optic communications and fiber optic communications equipment thereof;
The splicing point of step 1.5, optical cable segment generates;
Step 2, optical routing are set up;
The starting point boundary mark of step 2.1, Surveillance center selective light route in GIS-Geographic Information System;
Step 2.2, GIS-Geographic Information System search the optical cable segment and untapped fibre core thereof of appearing this point;
Step 2.3, Surveillance center choose a fibre core of certain optical cable segment;
Step 2.4, GIS-Geographic Information System find out and with the optical cable segment selecting fibre core to connect into optical routing, can judge whether the optical cable segment not connecting into fiber cable network, if so, then jump to step 2.3, if not, then jump to step 2.5;
Step 2.5, Surveillance center select fibre core complete and preserve this information;
Step 3, optical cable segment and optical routing form fiber cable network topology;
In step 4, fiber cable network topology, monitoring modular is set;
Step 5, Surveillance center are monitored optical cable segment by monitoring modular, and select monitoring pattern, if roll-call monitoring pattern, then jump to step 5.1, if automatic periodic monitoring pattern, then jump to step 5.2, if trouble alarm monitoring pattern, then jump to step 5.3;
Step 5.1, Surveillance center carry out roll-call monitoring to optical cable segment;
Step 5.1.1, Surveillance center's instruction start monitoring;
Step 5.1.2, Surveillance center select to carry out the monitoring station of monitoring and optical routing;
Step 5.1.3, Surveillance center judge whether the parameterized template of monitoring to some extent, if so, then jump to step 5.1.5, if not, then jump to step 5.1.4;
Step 5.1.4, Surveillance center arrange the parameter of monitoring;
Step 5.1.5, Surveillance center send Monitoring instruction to selected monitoring station;
Step 5.1.6, monitoring station send Monitoring instruction to monitoring modular and monitor optical routing inner fiber;
Step 5.1.7, monitoring station receive monitoring result, are sent to Surveillance center, and Surveillance center receives monitoring result, based on monitoring result formation curve file;
Step 5.2, Surveillance center carry out automatic periodic monitoring to optical cable segment;
Step 5.2.1, Surveillance center are to the monitoring station setting periodic monitoring time;
Step 5.2.1.1, Surveillance center select setting the periodic monitoring time monitoring station and under optical routing;
Step 5.2.1.2, Surveillance center's setting periodic monitoring time;
Step 5.2.1.3, Surveillance center send the director data of periodic monitoring time to monitoring station;
Step 5.2.2, monitoring station judge whether the periodic monitoring time, if so, then jump to step 5.2.3, if not, then jump to step 5.2.2;
Step 5.2.3, monitoring station control monitoring modular and monitor optical fiber and receive Monitoring Data;
Step 5.2.4, monitoring station receive monitoring result, are sent to Surveillance center;
Step 5.3, Surveillance center carry out trouble alarm monitoring to optical cable segment;
The performance number of step 5.3.1, monitoring modular Real-time Collection each road optical fiber;
The Monitoring Data of step 5.3.2, monitoring station timing reading monitoring module;
Monitoring Data compares with alarming threshold value by step 5.3.3, monitoring station, judges whether to produce alarm, if so, then jumps to step 5.3.4, if not, then jumps to step 5.3.2;
Step 5.3.4, monitoring station transmitting optical power data are to Surveillance center;
The information of step 5.3.5, monitoring station inquiry optical routing, starts obstacle test;
Step 5.3.6, monitoring station analyzing test data, judge whether to need alarm, if then warning information is sent to Surveillance center, and jumps to step 5.3.7, if not, then jumps to step 5.3.5;
Step 5.3.7, Surveillance center send warning information;
Step 6, Surveillance center's analyzing test data, and judged whether that optical cable segment breaks down, if so, then jump to step 7, then jump to step 5 if not;
Step 7, Surveillance center send work to be safeguarded fault optical cable segment;
Step 8, monitoring module monitors have completed the optical cable segment of maintenance, and jump to step 5;
Wherein, after the splicing point generation of optical cable segment, the layer data upload of the optical cable segment established is preserved to Surveillance center; Before Surveillance center carries out trouble alarm monitoring to optical cable segment, Surveillance center, according to luminous power parameter request required under optical cable normal operating conditions, presets optical power alarming threshold value.
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| CN108768509A (en) * | 2018-04-16 | 2018-11-06 | 国家电网公司 | A kind of fault location algorithm based on lightguide cable link |
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