A method for testing fiber optic faults in multi-level non-equally distributed epon networks
A test method and technology for fiber optic faults, applied in electrical components, electromagnetic wave transmission systems, transmission systems, etc., can solve problems such as limited dynamic range of narrow pulse width tests, inability to realize signal tests, etc., and achieve the effect of reducing costs
Active Publication Date: 2015-11-18
STATE GRID CORP OF CHINA +2
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Problems solved by technology
[0004] The purpose of the present invention is to solve the problem that the narrow pulse width test dynamic range of the existing OTDR optical time domain reflectometer is limited, and the signal test after the attenuation of the seven-stage optical splitter cannot be realized, and a method of segmenting the test light path by using the redundant optical fiber core is invented. Test so that the non-uniform EPON network fiber fault test method that can determine the location of the fault point
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[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0026] like Figure 1-6 shown.
[0027] A method for testing optical fiber faults in a multi-level non-equally divided EPON network, which includes the following optical path connections and determinations. A wave combiner is installed at a certain level of optical splitter, and the core of the light-emitting point trunk optical cable that has not passed through the optical splitter is used as another link of the test light, thereby skipping the loss of the previous levels of optical splitters and establishing at least two tests link, so as to decompose the single multi-splitter series EPON point-to-multipoint line test into at least two EPON point-to-multipoint line tests with fewer series, so as to reduce the interference of the multi-level optical splitter attenuation on the fault judgment of the test line; The method for determining the location of ...
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The invention provides a method for testing multistage non-equipartition EPON optical fiber failures. The method is characterized in that specific optical cable major trunk road surplus optical fibers, combiners and an optical switch of a non-equipartition EPON line are utilized to decompose a single EPON point-to-multipoint test line into two or more point-to-multipoint test lines for test, the two or more point-to-multipoint test lines are combined into a test wavy curve through later computer data processing, and then the positions of failure points are determined. By the adoption of the method, the dynamic range of an optical time domain reflectormeter in an EPON line test is increased, and the problem that bottom noise interference affects failure judgment is solved.
Description
technical field [0001] The invention relates to an optical fiber fault location diagnosis technology, in particular to a method for determining an optical fiber fault location in a multi-level non-equivalent Ethernet passive optical network (EPON) communication line, Test the optical channel, decompose a single EPON test line into two test lines for testing, and solve the problem that the signal is easily interfered by the bottom noise during the multi-level non-equivalent EPON network fiber fault test. Background technique [0002] At present, the terminal equipment of the distribution network has the characteristics of large quantity, wide distribution and scattered, small and important data traffic, and high security requirements. EPON passive optical network can well adapt to the above characteristics, so it has become the most important part of the distribution communication network. Primary communication technology. [0003] Different from the network structure of the...
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IPC IPC(8): H04B10/071
Inventor 黄进曹晶丁士长谈军
Owner STATE GRID CORP OF CHINA