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[AipuWaton] Nkag siab Yim Hlau hauv Ethernet Cables: Kev Ua Haujlwm thiab Kev Ua Zoo Tshaj

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Kev sib txuas cov kab hluav taws xob sib txuas feem ntau tuaj yeem ua rau tsis meej pem, tshwj xeeb tshaj yog thaum sim txiav txim siab qhov twg ntawm yim tooj liab xov hlau nyob hauv Ethernet cable yog qhov tseem ceeb rau kev ua kom muaj kev sib txuas hauv ib txwm. Txhawm rau kom paub meej qhov no, nws yog ib qho tseem ceeb kom nkag siab txog tag nrho cov haujlwm ntawm cov xov hlau no: lawv tau tsim los txo cov kev cuam tshuam hluav taws xob (EMI) los ntawm kev sib tw ntawm cov xov hlau ua ke ntawm qhov tshwj xeeb. Qhov kev sib tw no tso cai rau cov hluav taws xob hluav taws xob uas tsim tawm thaum lub sij hawm xa hluav taws xob hluav taws xob kom tshem tawm ib leeg, tshem tawm cov kev cuam tshuam zoo. Lo lus "twisted khub" aptly piav txog qhov kev tsim kho no.

Lub Evolution ntawm Twisted Pairs

Cov khub twisted thaum xub thawj siv rau kev sib kis xov tooj, tab sis lawv cov txiaj ntsig tau coj mus rau lawv qhov kev txiav txim siab me ntsis hauv cov teeb liab kis tau tus mob. Tam sim no, cov hom siv dav tshaj plaws yog Qeb 5e (Cat 5e) thiab Qeb 6 (Cat 6) twisted khub, ob leeg muaj peev xwm ua tiav bandwidths txog li 1000 Mbps. Txawm li cas los xij, ib qho kev txwv tseem ceeb ntawm cov kab sib tw twisted yog lawv qhov kev sib kis ntau tshaj plaws, uas feem ntau tsis tshaj 100 meters.

Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias nco txog T568A kev txiav txim tsis tsim nyog vim tias nws txo qis dua. Yog tias xav tau, koj tuaj yeem ua tiav cov qauv no yooj yim los ntawm kev sib pauv cov xov hlau 1 nrog 3 thiab 2 nrog 6 raws li T568B teeb tsa.

Wiring Configuration rau ntau daim ntawv thov

Rau cov qauv siv uas siv Qeb 5 thiab Qeb 5e twisted khub, plaub khub ntawm cov xov hlau - yog li, yim tag nrho cov xov hlau tseem ceeb - feem ntau yog ua haujlwm. Rau cov tes hauj lwm ua hauj lwm nyob rau hauv 100 Mbps, qhov kev teeb tsa ib txwm siv cov xov hlau 1, 2, 3, thiab 6. Cov txheej txheem sib txuas, hu ua T568B, npaj cov xov hlau ntawm ob qho kawg raws li hauv qab no:

1A
2B

T568B Kev xaim hluav taws xob:

  • Pin 1: txiv kab ntxwv-dawb
  • Pin 2: ol
  • Pin 3: ntsuab-dawb
  • Pin 4: blue
  • Pin 5: xiav-dawb
  • Pin 6: Green
  • Pin 7: xim av-dawb
  • Pin 8 : brown

 

T568A Kev txiav txim xaim:

Pin 1: ntsuab-dawb
Pin 2: Green
Pin 3: txiv kab ntxwv-dawb
Pin 4: blue
Pin 5: xiav-dawb
Pin 6: ol
Pin 7: xim av-dawb

Pin 8 : brown

Nyob rau hauv feem ntau Fast Ethernet tes hauj lwm, tsuas yog plaub ntawm yim cores (1, 2, 3, thiab 6) ua kom tiav lub luag haujlwm hauv kev xa thiab txais cov ntaub ntawv. Cov xov hlau seem (4, 5, 7, thiab 8) yog ob txoj kev thiab feem ntau tshwj tseg rau kev siv yav tom ntej. Txawm li cas los xij, hauv cov tes hauj lwm tshaj 100 Mbps, nws yog tus qauv coj los siv tag nrho yim cov xov hlau. Nyob rau hauv cov ntaub ntawv no, xws li nrog Qeb 6 los yog siab dua cables, siv tsuas yog ib tug subset ntawm lub cores yuav ua rau muaj kev cuam tshuam network stability.

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Cov ntaub ntawv tso tawm (+)
Cov ntaub ntawv tso tawm (-)
Cov ntaub ntawv nkag (+)
Khaws cia rau kev siv xov tooj
Khaws cia rau kev siv xov tooj
Cov ntaub ntawv nkag (-)
Khaws cia rau kev siv xov tooj
Khaws cia rau kev siv xov tooj

Lub hom phiaj ntawm Txhua Hlau

Txhawm rau kom nkag siab zoo dua yog vim li cas cov xov hlau 1, 2, 3, thiab 6 tau siv, cia peb saib cov hom phiaj tshwj xeeb ntawm txhua qhov tseem ceeb:

Qhov tseem ceeb ntawm Twisted Pair Density thiab Shielding

Thaum stripping ib Ethernet cable, koj yuav pom qhov sib tw ceev ntawm cov hlua hlau sib txawv heev. Cov khub lub luag haujlwm rau kev xa cov ntaub ntawv-feem ntau yog cov txiv kab ntxwv thiab ntsuab khub-tws ntau nruj dua li cov uas tau muab faib rau hauv av thiab lwm yam dej num, xws li cov xim xim av thiab xiav. Yog li ntawd, ua raws li T568B xov hlau tus qauv thaum crafting thaj cables yog ib qho tseem ceeb rau kev pom zoo.

Kev Ntseeg Tsis Ncaj Ncees

Nws tsis yog qhov tsis tshua muaj neeg hnov ​​​​cov neeg hais tias, "Kuv nyiam siv kuv tus kheej txoj kev npaj thaum ua cov cables; puas yog? Txawm hais tias tej zaum yuav muaj qee qhov yooj yim rau kev siv tus kheej hauv tsev, nws yog qhov pom zoo kom ua raws li cov lus txib xaim hauv kev tshaj lij lossis cov xwm txheej tseem ceeb. Deviating los ntawm cov qauv no tuaj yeem ua rau tsis muaj txiaj ntsig ntawm kev sib tw twisted khub cables, ua rau cov ntaub ntawv tseem ceeb tsis tau thiab txo kev sib kis.

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Xaus

Hauv cov ntsiab lus, yog tias koj txiav txim siab npaj cov xov hlau raws li tus kheej nyiam, nco ntsoov muab cov xov hlau 1 thiab 3 ua ke hauv ib khub sib tw, thiab cov xov hlau 2 thiab 6 ua ke hauv lwm tus khub twisted. Ua raws li cov lus qhia no yuav ua kom koj lub network ua haujlwm tau zoo thiab ntseeg tau.

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