H3C SecPath F5020 Installation Manual

Also see for SecPath F5020: Configuration guide Installation, quick start Manual Interface configuration guide

Contents

H3C SecPath F5020 Installation Manual Manual pdf 63 page image

564. Cut the top of the wires even with one another. Insert the wires into the RJ-45 end and makesure the wires extend to the front of the RJ-45 end and make good contact with the metalcontacts in the RJ-45 end and in the correct order.5. Crimp the RJ-45 connector with the crimping pliers until you hear a click.6. Use a cable tester to verify the connectivity of the cable.Optical fiberOptical fibers feature low loss and long transmission distance.Optical fibers can be classified into single mode fibers and multi-mode fibers. A single mode fiber(with yellow jacket) carries only a single ray of light; a multi-mode fiber (with orange jacket) carriesmultiple modes of lights.Table 32 Characteristics of single mode and multi-mode optical fibersItem Single mode fiber Multi-mode fiberCore Small core (10 micrometers or less) Larger core than single mode fiber (50micrometers, 62.5 micrometers or greater)Dispersion Less dispersion Allows greater dispersion and therefore,signal loss exists.Light source andtransmission distanceUses lasers as the light source oftenwithin campus backbones for distanceof several thousand metersUses LEDs as the light source often withinLANs or distances of a couple hundredmeters within a campus networkTable 33 Allowed maximum tensile force and crush loadPeriod of force Tensile load (N) Crush load (N/mm)Short period 150 500Long term 80 100Fiber connectors are indispensable passive components in an optical fiber communication system.They allow the removable connection between optical channels, which makes the optical systemdebugging and maintenance more convenient. There are multiple types of fiber connectors. Figure35 shows an LC connector.Figure 35 Appearance of an LC connectorFollow these guidelines when you connect an optical fiber:• Before connecting an optical fiber, make sure the connector and cable type match the hotswappable interface module.• The fiber Ethernet port of the firewall supports only the LC connector.• Fiber connectors are fitted with dust caps. Keep the dust caps secure when the fiber connectorsare in use. Install dust caps when the fiber connectors are not in use to avoid damage to theirend face. Replace the dust cap if it is loose or polluted.• Before connecting an optical fiber, use dust free paper and absolute alcohol to clean the endface of the two fiber connectors. You can brush the end faces only in one direction.

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