A ring feeder structure odn network system with expansion adaptability and line protection function
A network system and line protection technology, applied in transmission systems, electromagnetic wave transmission systems, electrical components, etc., can solve problems such as increasing equipment operation and maintenance costs, increasing the complexity of network auxiliary equipment, and simplifying network infrastructure.
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[0029] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0030] Description of reference symbols: 1—regional optical fiber access center; 11—network path monitoring and switching control unit; 12—optical switch switching matrix; 121—protection path optical switch switching matrix; 122—OTDR scanning channel switching optical switch; 2— Feeder fiber optic cable ring; 3—feeder fiber branch point; 4—fiber distribution box; 41—fiber optic splitter; 411—2×2 3dB fiber optic coupler; 412—1×n fiber optic splitter; 5—user optical network unit ONU .
[0031] Such as Figure 1-Figure 3 As shown, taking a ring multi-node ODN as an example, a ring ODN consists of a regional optical fiber access center 1, several nodes in the region and a feeder fiber optic cable ring 2 connecting them. The regional optical fiber access center 1 is responsible for connecting each user and transmitting two-way information, and is also resp...
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