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《双绞线的标准做法（standard practice of twisted pair）》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、双绞线的标准做法（Standardpracticeoftwistedpair）StandardpracticeoftwistedpairPinorderDirectconnectionsignalofmediumThearrangementorderoftwistedpairOneTX+(transmission)WhiteandgreenTwoTX-(transmission)greenThreeRX+(receiving)WhiteandorangeFourNotinuseblueFiveNotinuseWhiteandb
2、lueSixRX-(receiving)orangeSevenNotinuseWhitebrownEightNotinuseBrown(EIA/TIA568Astandard)First,twointernationalstandardsontwistedpairpracticeTherearetwointernationalstandardsfortwistedpair,EIA/TIA568AandEIA/TIA568Brespectively.Let'stakealookatthewaytheyconnect,seethe
3、picturebelow:PinorderDirectconnectionsignalofmediumThearrangementorderoftwistedpairOneTX+(transmission)WhiteandorangeTwoTX-(transmission)orangeThreeRX+(receiving)WhiteandgreenFourNotinuseblueFiveNotinuseWhiteandblueSixRX-(receiving)greenSevenNotinuseWhitebrownEightN
4、otinuseBrown(EIA/TIA568Bstandard)Infact,thereisnoessentialdifferencebetweenstandardEIA/TIA568AandEIA/TIA568Btwo,butonlythedifferenceincolor.Whatusersneedtopayattentiontoistoensuretheconnectionoftwocrystalheads:The1,2linepairisaroundpair;The3,6linepairisaroundpair;Th
5、e4,5linepairisaroundpair;The7,8linepairisaroundpair;Thefourlinesof4/5,7/8intwistedpairarenotdefined.Thespecificline,oftendonotpayattentiontowith1,2,3,4(NOVELLnetinafewyearsagowhenthisisconnectedtothe10Mnetworkconnection,butthe10Mnetworkisrelativelynarrowbandwidth,go
6、odconnectivity,itisconnectedto1,2,3,4canalsoexchange).Becauseofthehighbandwidthof100M,the1,2,3and4cannotworkwell.Unfortunately,theperformanceoffaultindifferentways:somecomputersinconnection,networkcardandhub/lightswitcheshavenormallight;lightissomecomputernetworkcar
7、donthenormallight,andthelightsideofthehub/switchflashes,andincreasingthedifficultyofdebugging.Sothismistakemustbehighlyvalued.Two,whatisthestraightcable?Whatiscrosscable?Ingeneral,we'llseetwocommonwaysofconnectingtwistedwires:throughcablesandcrosswires.Thefollowingt
8、wokindsofcableleadsortingandapplicableoccasions.1.throughcable:Bothendsofthecrystalheadfollowthe568Aor568Bstandard,andeachstrandofthetwist
