CN102594452A - Self diagnosis passive optical network system - Google Patents
Self diagnosis passive optical network system Download PDFInfo
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- CN102594452A CN102594452A CN2012100682213A CN201210068221A CN102594452A CN 102594452 A CN102594452 A CN 102594452A CN 2012100682213 A CN2012100682213 A CN 2012100682213A CN 201210068221 A CN201210068221 A CN 201210068221A CN 102594452 A CN102594452 A CN 102594452A
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Abstract
The invention discloses a self-diagnostic passive optical network system, which comprises an optical cable terminal (OLT) device, a backbone optical cable (140), an optical distribution node (OND) system, a branch optical cable (170) and an optical access network user terminal (180) which are in successive connection. A self diagnosis control device is arranged between the OLT device and the backbone optical cable (140), and correspondingly, a self diagnosis identification device is arranged on the branch optical cable between the OND system and the optical access network user terminal (180); according to the passive optical network system, different OND branches can be selected to be tested through different wavelengths, so that a point-to-multipoint test is converted into a point-to-point test , and the fault position of the OND branch can be accurately confirmed.
Description
Technical field
The present invention relates to a kind of self diagnosis passive optical network; Relate in particular to a kind of can be to PON (Passive Optical Network; Passive optical network is hereinafter to be referred as PON) fault of optical cable positions in the system self diagnosis passive optical network, the invention belongs to the communications field.
Background technology
In recent years, along with the 3G business is carried out gradually, IPTV (Interactive Personality TV, IPTV) user increases, the Internet bandwidth rises year by year, the user increases the increasing demand of the network bandwidth.EPON (Passive Optical Network; Hereinafter to be referred as PON) technology is as Optical Fiber Transmission and the access technology of a kind of point to multiple spot, has to save advantages such as machine room investment, device security height are shared, saved to cable resource, bandwidth resources, networking speed is fast, integrated cost is low.Therefore construction total amount in the whole world of PON grid rises year by year, and has become the inexorable trend of development.
There are EPON (Ethernet passive optical network) and GPON (Gigabit Passive Optical Network) in the main PON system that builds in the whole world at present.Transmission plan is with 1310nm wavelength transmission narrow band service signal; With 1550nm wavelength transmission broadband service signal, adopt Multi-point Control Protocol MPCP (Multi-Point Control Protocol: be called for short MPCP), time division multiplexing tdm A (Time Division Multiple Access) and measuring technology simultaneously.Do not need power supply unit at optical branch point, only need to install a simple light distributor and get final product.
The traditional passive optical network system is as shown in Figure 2; Optical fiber cable termination equipment), (Optical Distribution Node:, the Optical Access Network user terminal adopts ONU (Optical Network Unit: for backbone optical cable 140, the ODN of Optical Distribution Node system optical network unit) or ONT (Optical Network Terminal: ONT Optical Network Terminal) Optical Distribution Node), branched optical cable 170 and a plurality of Optical Access Network user terminal 180 comprise: the optical fiber cable termination equipment OLT of EPON (optical line terminal:.This system generally comprises the light signal of three kinds of wavelength: upward signal 1310nm, downstream signal 1490nm, CATV (TV) signal, preceding two signals are used for user communication, like phone, the Internet etc.
Yet along with the construction amount explosive increase of PON system, also brought attendant's shortage, workload is heavy, maintenance service lacks, be difficult to the problem of accurate fault location point, be in particular in:
1, the PON network safeguards that difficult point is mainly at ODN (Optical Distribution Node; Optical Distribution Node) and branch; Main cause is that ODN quantity is various, and branch is huge especially, causes network complicated; Realize that fault location is relatively more difficult fast, this problem is that the maintenance cost of minimizing system has proposed a difficult problem.
2, traditional OTDR (Optical Time Domain Reflectometer; Optical time domain reflectometer) technology is difficult to the accurate position of location ODN branch; Reason is that OTDR is a kind of test equipment of point-to-point; It is also inapplicable to the test environment of multiple spot to be applied in this point, even more accurate, that resolution is higher, dynamic range the is bigger now PON-OTDR that is exclusively used in the PON network test can not accurately measure breakpoint.The length that the OTDR technology is treated the photometry road has special requirement, can not differentiate the identical branch's light path of length.Because if the length of two branch roads is identical, the test signal that they reflect can arrive OTDR simultaneously, and OTDR just can't distinguish, if line fault also to be hard to tell Chu be the fault that which bar circuit occurs on earth.If breakpoint is just near another branch or overlapping, OTDR is the accurately localization of faults and lost effect just, can't normally detect light path.
3, with regard to this problem, industry has proposed several different methods and scheme, for example regulates the different length of ONU, so that OTDR can differentiate the terminal, but can't analyze real breakpoint; Also there is method to propose to place an array waveguide grating AWG, is the test of point-to-point with the test conversion of putting multiple spot, but, do not possess feasibility because cost is too high at the ODN place.
Summary of the invention
The object of the invention is exactly to overcome the problem and shortage that prior art exists; A kind of self diagnosis passive optical network is provided; This passive optical network can adopt the OTDR of wavelengthtunable and settle a wavelength filter at each branch outlet place of ODN; Thereby realize test, reach accurate fault location each branch's light path in the PON network.
The technical scheme that the present invention adopted is:
A kind of self diagnosis passive optical network; Comprise the optical fiber cable termination equipment OLT, backbone optical cable, the ODN of Optical Distribution Node system, branched optical cable, the Optical Access Network user terminal that connect successively; Be provided with the self diagnosis control device between described optical fiber cable termination equipment OLT and the backbone optical cable, and the branched optical cable between described accordingly Optical Distribution Node ODN of system and the Optical Access Network user terminal is provided with the self diagnosis recognition device; Its self diagnosis control device closes glistening light of waves switch, wavelengthtunable OTDR and controller by multichannel and combines; Multichannel is closed glistening light of waves switch and is comprised the multichannel optical switch of a 1*N and the optical branching device group of being made up of N optical branching device; The input of multichannel optical switch is connected with wavelengthtunable OTDR; The input of optical branching device is connected with the output of multichannel optical switch and the output of optical fiber cable termination equipment OLT respectively, and the output of optical branching device is connected with backbone optical cable; Its self diagnosis recognition device is combined by the wavelength filter on each branched optical cable that is arranged between ODN of Optical Distribution Node system and the Optical Access Network user terminal; The wavelength of the wavelength filter on the wavelength filter on each branched optical cable and other branched optical cable is inequality, and the wavelength adjusting range of the wavelengthtunable OTDR in the wave-length coverage of wavelength filter and the self diagnosis control device is corresponding.
Described optical branching device group is formed in parallel by many groups optical branching device, and its input correspondence is connected with a plurality of optical fiber cable termination equipment OLT, and its output is connected with a plurality of Optical Distribution Node ODN of system through the backbone optical cable correspondence and forms.
Said optical branching device is a light wavelength division multiplexing.
Said wavelength filter bandwidth of operation adopts through the service band of the test signal of correspondence with it among optical network system service signal and the wavelengthtunable OTDR.
Said wavelength filter operation wavelength is selected in 1565nm ~ 1700nm wave-length coverage.
Said wavelength filter operation wavelength is spaced apart 50GHz or 100GHz or 200GHz or 400GHz.
Said wavelength filter is the plug-in wavelength filter.
Said Optical Access Network user terminal is optical network unit ONU or ONT Optical Network Terminal ONT.
The present invention has following advantage:
1, adopts self diagnosis passive optical network of the present invention; Can be through the different ODN branch of the selected test of different wave length; Thereby the test conversion that will put multiple spot is the test of point-to-point; Can confirm the abort situation of ODN branch very accurately, solve the PON network cable and safeguarded the particularly technical problem of ODN branch maintenance
2, self diagnosis passive optical network of the present invention is utilized in the ODN position increase wavelength filter of PON system; And do not need extra to each ONU client increase reflector; Therefore smaller to the change of PON system link, quantities is little, just can realize the accurate location to the PON system failure.
Description of drawings
The general structure sketch map of Fig. 1, self diagnosis passive optical network of the present invention;
Fig. 2, traditional P ON network basic structure and composition
Fig. 3, multichannel are closed the basic structure sketch map of glistening light of waves switch;
Fig. 4, wavelength filter of the present invention the operation wavelength sketch map;
Fig. 5, self diagnosis passive optical network overall applicability form sketch map of the present invention;
The form of implementation sketch map that monitoring is interrupted in Fig. 6, ODN branch of Optical Distribution Node system;
Fig. 7, wavelengthtunable OTDR test curve sketch map of the present invention;
The workflow diagram that monitoring is interrupted in Fig. 8, ODN branch of Optical Distribution Node system.
Wherein:
OLT, optical fiber cable termination equipment 110, multichannel are closed glistening light of waves switch;
120, wavelengthtunable OTDR; 130, controller;
140, backbone optical cable; ODN, Optical Distribution Node system;
160, wavelength filter; 170, branched optical cable;
180, Optical Access Network user terminal; 112, multichannel optical switch;
111, optical branching device;
Embodiment
Further specify embodiment of the present invention and operation principle below in conjunction with accompanying drawing.
Fig. 1 is a general structure sketch map of the present invention.Comprise that mainly optical fiber cable termination equipment OLT, multichannel close glistening light of waves switch 110, wavelengthtunable OTDR 120, controller 130, backbone optical cable 140, the ODN of Optical Distribution Node system, wavelength filter 160, branched optical cable 170 and a plurality of Optical Access Network user terminal 180, the quantity of wavelength filter 160 is corresponding with the ODN of Optical Distribution Node system output.Compared to existing technologies; The present invention is employed in the former EPON and increases parts newly; Newly-increased parts are that multichannel is closed glistening light of waves switch 110, wavelengthtunable OTDR 120, controller 130, wavelength filter 160; Make between optical fiber cable termination equipment OLT and the backbone optical cable 140 and be provided with the self diagnosis control device, and the branched optical cable between described accordingly Optical Distribution Node ODN of system and the Optical Access Network user terminal 180 is provided with the self diagnosis recognition device.The self diagnosis control device closes glistening light of waves switch 110, wavelengthtunable OTDR 120 and controller 130 by multichannel and combines, and the self diagnosis recognition device is combined by the wavelength filter 160 on each branched optical cable that is arranged between ODN of Optical Distribution Node system and the Optical Access Network user terminal 180.More than the annexation of newly-increased parts is: multichannel is closed between glistening light of waves switch 110 insertion cable terminal equipment OLT and the backbone optical cable 140; The input port that the input optical signal of optical fiber cable termination equipment OLT closes glistening light of waves switch 110 through optical fiber and multichannel links to each other; The output port that multichannel is closed glistening light of waves switch 110 links to each other with backbone optical cable 140, and another input port that multichannel is closed glistening light of waves switch 110 and wavelengthtunable OTDR 120 link to each other through optical fiber; Wavelength filter 160 connects through optical fiber to be got involved between the Optical Distribution Node ODN of system and each branched optical cable 170, and controller 130 closes glistening light of waves switch 110 with optical fiber cable termination equipment OLT, multichannel, wavelengthtunable OTDR 120 all links to each other through electrical interface.Wavelengthtunable OTDR adopts the operation wavelength with OTDR to be adjusted to specified wavelength, measuring fiber attenuation and one of them branched optical cable carried out the optical time domain reflectometer of fiber failure location.
Fig. 3 is that multichannel of the present invention is closed glistening light of waves switch 110 structural representations; Its structure mainly comprises the multichannel optical switch 112 and N optical branching device 111 of a 1xN; The input of multichannel optical switch 112 connects wavelengthtunable OTDR 120, two inputs of optical branching device 111, and a port connects the output of multichannel optical switch 112; Another port connects the optical line terminal OLT of PON network, and the output of optical branching device 111 connects the backbone optical cable 140 of PON network.Optical branching device 111 can adopt light wavelength division multiplexing or other to have the device of light wavelength division multiplexing identical function.
Fig. 4 is the operation wavelength sketch map of wavelength filter 160 of the present invention; Described wavelength filter is meant that a part limit is logical; The logical filter of part band; Logical being meant in limit allows the passive optical network service signal, comprises the service wavelength of 1310nm, 1490nm, 1550nm, and logical the referring to of band only allows the signal of an OTDR test wavelength to pass through.The wavelength filter of wavelength X 1 is placed on first corresponding output port of first branch of the passive network Optical Distribution Node ODN of system; 1310nm upward signal, 1490nmCATV (Cable Television that this moment, this output port can only break-through PON system; Cable TV) signal, 1550nm downstream signal; And the OTDR test signal of wavelength X 1, other signal all is prevented from.In like manner the wavelength filter of wavelength X 2 is placed on second branch of the ODN of Optical Distribution Node system; Second output port of the corresponding Optical Distribution Node ODN of system; This wavelength filter can only break-through PON system 1310nm upward signal, 1490nmCATV signal, 1550nm downstream signal; And the OTDR test signal of wavelength X 2, other signal all is prevented from.The rest may be inferred; The output of the network Optical Distribution Node ODN of system of 1xN can be provided with the wavelength filter of corresponding with it N the different wave length of quantity; These wavelength filter different wave lengths λ 1, λ 2 ..., λ n bandwidth can be arranged to the interval of 50GHz (0.4nm), 100GHz (0.8nm), 200GHz (1.6nm) or 400GHz (3.2nm); These wavelength can be arranged in 1565nm ~ 1700nm wave-length coverage, can adapt to present 1x8,1x16,1x32,1x64 and following 1x128, the test of 1x256 ODN.Wavelength filter used in the present invention can be designed to pluggable easy structure, during construction, only needs to increase at the output optical port of the optical-fiber network Optical Distribution Node ODN of system the wavelength filter of a plug-in, can make construction simple, and quantities is minimum.
The present invention can also adopt a plurality of optical fiber cable termination equipment OLT to share multichannel and close glistening light of waves switch, controller, wavelengthtunable OTDR; Multichannel is closed a plurality of Optical Distribution Node ODN of system of glistening light of waves switch rear end parallel connection, wavelength filter, branched optical cable and Optical Access Network user terminal and is realized more multichannel fault location; As shown in Figure 5; A plurality of optical fiber cable termination equipment OLT close with corresponding multichannel that one of them input of light wavelength division multiplexing links together in the glistening light of waves switch; A plurality of optical fiber cable termination equipment OLT all are connected with controller; A plurality of optical fiber cable termination equipment OLT this moment shared wavelengthtunable OTDR, a multichannel are closed glistening light of waves switch; Multichannel is closed the backbone optical cable of the output connection PON network of the light wavelength division multiplexing in the glistening light of waves switch, and the backbone optical cable back parallel connection behind the light wavelength division multiplexing at this moment is provided with the ODN of Optical Distribution Node system, wavelength filter, branched optical cable, Optical Access Network user terminal.Adopt a plurality of optical fiber cable termination equipment of this structure OLT to share a wavelengthtunable OTDR and warning information is delivered in the same controller, manage concentratedly and realize multichannel fault location, saved the cost of whole fault locator.
In conjunction with Fig. 6 and Fig. 8 the fault location implementation procedure of the branched optical cable interrupt event in the self diagnosis passive optical network is specifically described as follows: when branched optical cable 170 one of them branch take place to interrupt; For example the respective branches optical cable of Optical Access Network user terminal ONU2 connection is because external cause causes interrupting; ONU2 sends warning information to optical fiber cable termination equipment OLT; Optical fiber cable termination equipment OLT learns that ONU2 breaks down; Alarm earlier, optical fiber cable termination equipment OLT passes to controller 130 with this alarm signal, and controller 130 is received alarm signal; Clearly be after the circuit alarm appears in ONU2 branch that the wavelength filter of wavelength X 2 has been installed; The controller drives multichannel is closed the corresponding optical switch passage of optical fiber cable termination equipment OLT that glistening light of waves switch 110 switches to alarm, and controller drives is regulated the long and working temperature in pulse laser chamber of wavelengthtunable OTDR 120 then, the operation wavelength of wavelengthtunable OTDR 120 is adjusted to the test wavelength X 2 at fault branch place.Wavelengthtunable OTDR 120 sends out the pulse test signal at this moment, begins to carry out the breakpoint test.Wavelengthtunable OTDR120 can analytic curve, compares with reference curve, gives optical fiber cable termination equipment OLT with information retransmission after confirming to conclude the position.This moment, test result was as shown in Figure 7, can accurately measure the breakpoint location of EPON through the measuring process of self diagnosis passive optical network of the present invention.
Though the present invention has at length illustrated and described a relevant certain embodiments reference, those skilled in the art should be understood that, is not deviating from the spirit and scope of the present invention and can make various changes in form with on the details.These change all will fall into the desired protection range of claim of the present invention.
Claims (8)
1. a self diagnosis passive optical network comprises the optical fiber cable termination equipment OLT, backbone optical cable (140), the ODN of Optical Distribution Node system, branched optical cable (170), the Optical Access Network user terminal (180) that connect successively, it is characterized in that:
Be provided with the self diagnosis control device between described optical fiber cable termination equipment OLT and the backbone optical cable (140), and the branched optical cable between described accordingly Optical Distribution Node ODN of system and the Optical Access Network user terminal (180) is provided with the self diagnosis recognition device;
Its self diagnosis control device closes glistening light of waves switch (110), wavelengthtunable OTDR (120) and controller (130) by multichannel and combines; Multichannel is closed glistening light of waves switch (110) and is comprised the multichannel optical switch (112) of a 1*N and the optical branching device group of being made up of N optical branching device (111); The input of multichannel optical switch (112) is connected with wavelengthtunable OTDR (120); The input of optical branching device (111) is connected with the output of multichannel optical switch (112) and the output of optical fiber cable termination equipment OLT respectively, and the output of optical branching device (111) is connected with backbone optical cable;
Its self diagnosis recognition device is combined by the wavelength filter (160) on each branched optical cable that is arranged between ODN of Optical Distribution Node system and the Optical Access Network user terminal (180); The wavelength of the wavelength filter on the wavelength filter on each branched optical cable and other branched optical cable is inequality, and the wavelength adjusting range of the wavelengthtunable OTDR (120) in the wave-length coverage of wavelength filter and the self diagnosis control device is corresponding.
2. a kind of self diagnosis passive optical network as claimed in claim 1 is characterized in that:
Described optical branching device group is formed in parallel by many groups optical branching device, and its input correspondence is connected with a plurality of optical fiber cable termination equipment OLT, and its output is connected with a plurality of Optical Distribution Node ODN of system through the backbone optical cable correspondence and forms.
3. according to claim 1 or claim 2 a kind of self diagnosis passive optical network is characterized in that:
Said optical branching device (111) is a light wavelength division multiplexing.
4. according to claim 1 or claim 2 a kind of self diagnosis passive optical network is characterized in that:
Said wavelength filter (160) bandwidth of operation adopts through the service band of the test signal of correspondence with it among optical network system service signal and the wavelengthtunable OTDR (120).
5. according to claim 1 or claim 2 a kind of self diagnosis passive optical network is characterized in that:
Said wavelength filter (160) operation wavelength is selected in 1565nm ~ 1700nm wave-length coverage.
6. a kind of self diagnosis passive optical network as claimed in claim 5 is characterized in that:
Said wavelength filter (160) operation wavelength is spaced apart 50GHz or 100GHz or 200GHz or 400GHz.
7. a kind of self diagnosis passive optical network as claimed in claim 5 is characterized in that:
Said wavelength filter (160) is the plug-in wavelength filter.
8. according to claim 1 or claim 2 a kind of self diagnosis passive optical network is characterized in that:
Said Optical Access Network user terminal (180) is optical network unit ONU or ONT Optical Network Terminal ONT.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102957977A (en) * | 2012-09-04 | 2013-03-06 | 青岛海信宽带多媒体技术有限公司 | Passive optical network and optical time domain detector optical module thereof |
| CN103297127A (en) * | 2013-06-09 | 2013-09-11 | 索尔思光电（成都）有限公司 | Optical network unit (ONU) optical module |
| CN103560826A (en) * | 2013-11-21 | 2014-02-05 | 国家电网公司 | Method for testing multistage non-equipartition EPON optical fiber failures |
| CN103675974A (en) * | 2013-12-23 | 2014-03-26 | 武汉光迅科技股份有限公司 | Filter capable of being used for both wave aggregation and bidirectional signal monitoring |
| CN104253644A (en) * | 2014-09-10 | 2014-12-31 | 江苏宇特光电科技股份有限公司 | PON (passive optical network) monitoring system based on wavelength scanning narrow line width OTDR (optical time domain reflectometry), and PON monitoring method based on wavelength scanning narrow line width OTDR |
| CN104685847A (en) * | 2013-08-05 | 2015-06-03 | 华为技术有限公司 | Bandwidth allocation method, device and system |
| CN105007116A (en) * | 2014-04-21 | 2015-10-28 | 江苏艾思特信息科技有限公司 | Rapid fiber fault monitoring system |
| CN105227231A (en) * | 2015-08-21 | 2016-01-06 | 国网天津市电力公司 | A kind of power distribution communication net EPON fiber optic cable monitor equipment live display unit based on cloud computing |
| CN106230499A (en) * | 2016-07-26 | 2016-12-14 | 桂林聚联科技有限公司 | A kind of fiber optic cable monitor device of tree-shaped fiber cable network |
| CN106911379A (en) * | 2015-12-23 | 2017-06-30 | 中国电信股份有限公司 | Realize method, management system and the optical time domain reflectometer equipment of light path detection |
| US9774390B2 (en) | 2013-10-25 | 2017-09-26 | Huawei Technologies Co., Ltd. | Fiber link recognition method, device, and system |
| CN111669221A (en) * | 2020-04-29 | 2020-09-15 | 华为技术有限公司 | Method, device and system for fault location |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1866790A (en) * | 2005-11-16 | 2006-11-22 | 华为技术有限公司 | PON network design method using OTDR detection light path |
| CN101442691A (en) * | 2008-12-22 | 2009-05-27 | 武汉光迅科技股份有限公司 | Optical cable monitoring system based on passive optical network system |
| US20090263122A1 (en) * | 2008-04-22 | 2009-10-22 | Roger Jonathan Helkey | Method and apparatus for network diagnostics in a passive optical network |
| CN102082609A (en) * | 2011-01-21 | 2011-06-01 | 中兴通讯股份有限公司 | Transmission method of optical line terminal (OLT), passive optical network (PON) system and optical signal |
| CN102244538A (en) * | 2010-05-10 | 2011-11-16 | 华为技术有限公司 | System and method for detecting sub-optical fibers, ODN (optical distribution network) and optical splitter |
| CN202488458U (en) * | 2012-03-15 | 2012-10-10 | 武汉光迅科技股份有限公司 | Self-diagnosis passive optical network system |
-
2012
- 2012-03-15 CN CN2012100682213A patent/CN102594452A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1866790A (en) * | 2005-11-16 | 2006-11-22 | 华为技术有限公司 | PON network design method using OTDR detection light path |
| US20090263122A1 (en) * | 2008-04-22 | 2009-10-22 | Roger Jonathan Helkey | Method and apparatus for network diagnostics in a passive optical network |
| CN101442691A (en) * | 2008-12-22 | 2009-05-27 | 武汉光迅科技股份有限公司 | Optical cable monitoring system based on passive optical network system |
| CN102244538A (en) * | 2010-05-10 | 2011-11-16 | 华为技术有限公司 | System and method for detecting sub-optical fibers, ODN (optical distribution network) and optical splitter |
| CN102082609A (en) * | 2011-01-21 | 2011-06-01 | 中兴通讯股份有限公司 | Transmission method of optical line terminal (OLT), passive optical network (PON) system and optical signal |
| CN202488458U (en) * | 2012-03-15 | 2012-10-10 | 武汉光迅科技股份有限公司 | Self-diagnosis passive optical network system |
Non-Patent Citations (1)
| Title |
|---|
| SWOOK HANN ET AL: "Monitoring technique for a hybrid PS/WDM-PON by using a tunable OTDR and FBGs", 《MEAS. SCI. TECHNOL.》 * |
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| CN102957977B (en) * | 2012-09-04 | 2015-11-18 | 青岛海信宽带多媒体技术有限公司 | EPON and optical time domain detector optical module thereof |
| CN103297127A (en) * | 2013-06-09 | 2013-09-11 | 索尔思光电（成都）有限公司 | Optical network unit (ONU) optical module |
| CN104685847A (en) * | 2013-08-05 | 2015-06-03 | 华为技术有限公司 | Bandwidth allocation method, device and system |
| US9774390B2 (en) | 2013-10-25 | 2017-09-26 | Huawei Technologies Co., Ltd. | Fiber link recognition method, device, and system |
| CN103560826A (en) * | 2013-11-21 | 2014-02-05 | 国家电网公司 | Method for testing multistage non-equipartition EPON optical fiber failures |
| CN103560826B (en) * | 2013-11-21 | 2015-11-18 | 国家电网公司 | A kind of multistagely non-ly divide equally EPON network fiber fault testing method |
| CN103675974B (en) * | 2013-12-23 | 2016-01-20 | 武汉光迅科技股份有限公司 | A kind of can simultaneously for close involve two-way signaling monitoring filter plate |
| CN103675974A (en) * | 2013-12-23 | 2014-03-26 | 武汉光迅科技股份有限公司 | Filter capable of being used for both wave aggregation and bidirectional signal monitoring |
| CN105007116A (en) * | 2014-04-21 | 2015-10-28 | 江苏艾思特信息科技有限公司 | Rapid fiber fault monitoring system |
| CN104253644A (en) * | 2014-09-10 | 2014-12-31 | 江苏宇特光电科技股份有限公司 | PON (passive optical network) monitoring system based on wavelength scanning narrow line width OTDR (optical time domain reflectometry), and PON monitoring method based on wavelength scanning narrow line width OTDR |
| CN104253644B (en) * | 2014-09-10 | 2017-02-15 | 江苏宇特光电科技股份有限公司 | PON (passive optical network) monitoring system based on wavelength scanning narrow line width OTDR (optical time domain reflectometry), and PON monitoring method based on wavelength scanning narrow line width OTDR |
| CN105227231A (en) * | 2015-08-21 | 2016-01-06 | 国网天津市电力公司 | A kind of power distribution communication net EPON fiber optic cable monitor equipment live display unit based on cloud computing |
| CN106911379A (en) * | 2015-12-23 | 2017-06-30 | 中国电信股份有限公司 | Realize method, management system and the optical time domain reflectometer equipment of light path detection |
| CN106230499A (en) * | 2016-07-26 | 2016-12-14 | 桂林聚联科技有限公司 | A kind of fiber optic cable monitor device of tree-shaped fiber cable network |
| CN111669221A (en) * | 2020-04-29 | 2020-09-15 | 华为技术有限公司 | Method, device and system for fault location |
| CN111669221B (en) * | 2020-04-29 | 2021-09-21 | 华为技术有限公司 | Method, device and system for fault location |
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Application publication date: 20120718 |