H3C SR6602 Installation Manual

Also see for SR6602: Configuration guide

Contents

H3C SR6602 Installation Manual Manual pdf 76 page image

68• Straight-through cables connect devices of different types—for example, router to PC and router toswitch.• Crossover cables connect devices of the same type—for example, switch to switch, router to router,and PC to PC.If an RJ-45 Ethernet port is enabled with MDI/MDIX autosensing, it can automatically negotiate pin roles.NOTE:The H3C SR6602 RJ-45 Ethernet interfaces support MDI/MDIX autosensing. By default, MDI/MDIXautosensing is enabled on an interface.Making an Ethernet twisted pair cableFollow these steps to make an Ethernet twisted pair cable:Step1 Cut the cable to a proper length with the crimping pliers.Step2 Strip off an appropriate length of the cable sheath. The length is typically that of the RJ-45 connector.Step3 Untwist the pairs so that they can lay flat, and arrange the colored wires based on the wiringspecifications.Step4 Cut the top of the wires even with one another. Insert the wires into the RJ-45 end and make sure the wiresextend to the front of the RJ-45 end and make good contact with the metal contacts in the RJ-45 end andin the correct order.Step5 Crimp the RJ-45 connector with the crimping pliers until you hear a click.Step6 Use a cable tester to verify the proper connectivity of the cable.Optical fiberYou can use an optical fiber to connect the following interface modules: HIM-4GBP/HIM-8GBP,HIM-CL1P/HIM-CL2P, HIM-CLS1P/HIM-CLS2P, HIM-MSP2P/HIM-MSP4P, HIM-PS1P,HIM-AL1P/HIM-AL2P, HIM-RS2P, MIM-2GBE, MIM-1POS, and MIM-1ATM-OC3.Optical 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 carriesonly a single ray of light; a multi-mode fiber carries multiple modes of lights.Table 31 Characteristics of single mode and multi-mode optical fibersSingle 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 andtransmissiondistanceUsers 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 hundred meterswithin a campus network