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Fiber patch cable is the fiber which connects the computer with equipment. , it is very convenient to connect and manage, thicker layer of protection, generally used in the connection between the Optical and the terminal box.
Fiber Jumper structure
1. The center is glass core of light transferring
2. The core surrounded by a layer of glass envelope with lower refractive index, so the fiber remained in the core
3. A thin plastic coat outside is used to protect the envelope.