H3C S10504 Installation Manual

Also see for S10504: Installation guide Installation, quick start

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H3C S10504 Installation Manual Manual pdf 89 page image

81OverviewOptical fiberOptical fibers are widely used in fiber-optic communications, which are advantageous for long-distancecommunications.Optical fibers can be classified into the following types:• Single mode fiber: It has a core size of 10 μm, and has a lower modal dispersion. It carries only asingle ray of light. It is mostly used for communication over longer distances.• Multi-mode fiber: It has a core size of 50 μm or 62.5 μm or higher, and has a higher modaldispersion than single-mode optical fiber. It is mostly used for communication over shorterdistances.Table 49 Allowed maximum tensile force and crush loadPeriod of force Tensile load (N) Crush load (N/mm)Short period 150 500Long term 80 100Optical fiber cableAn optical fiber cable is a cable containing one or more optical fibers. The optical fiber elements aretypically individually coated with plastic layers and contained in a protective tube. Optical fiber cablesfall into single-mode and multi-mode.Patch cordA fiber that has connectors at both ends is called a patch cord. A patch cord connects one optical deviceto another for signal routing. Patch cords fall into single-mode and multi-mode patch cords.• Single-mode patch cord: The jacket is yellow. It permits transmission over longer distances.• Multi-mode patch cord: The jacket is orange. It permits transmission over shorter distances.Patch cords are classified into SC, LC, and FC patch cords based on interface type. The length of a patchcord can be 0.5 m (1.64 ft), 1 m (3.28 ft), 2 m (6.56 ft), 3 m (9.84 ft), 5 m (16.40 ft), and 10 m (32.81ft).Pigtail cordA pigtail cord is an optical fiber that has an optical connector on one end and a length of exposed fiberon the other. The end of the pigtail is fusion spliced to a fiber, connecting the fiber cable and transceiver.Pigtail cords fall into single-mode (yellow) and multi-mode (orange), and can also be classified into SC,LC, and FC pigtail cords based on interface type.Fiber connectorFiber connectors are indispensable passive components in an optical fiber communication system. Theyallow the removable connection between optical channels, which makes the optical system debuggingand maintenance more convenient and the transit dispatching of the system more flexible.