Kev sib txuas Wired Ethernet tseem muaj thoob plaws hauv kev lag luam uas qhov kev nce nrawm thiab kev ruaj ntseg ntawm kev sib txuas hauv xov tooj yog qhov xav tau. Txawm li cas los xij, kev sib txuas lus wireless tau nce exponentially hauv tsev. Ntau tus tswv tsev tsis xav txog kev sib txuas lus ntau ntxiv lawm, tab sis nws tseem yog qhov kev xaiv tseem ceeb rau ntau yam xwm txheej.
Ethernet Cable yog dab tsi?
Cov khoom siv hauv lub network txuas feem ntau txuas nrog lub cev rau lub server, modem, router, lossis ib leeg nrog Ethernet cables. Txhua qhov kawg ntawm Ethernet cable muaj qhov txuas hu ua RJ45 connector. A Registered Jack 45 (RJ45) connector yog ib hom qauv ntawm lub cev txuas rau network cables. RJ45 connectors yog siv yuav luag nkaus nrog Ethernet cables thiab networking.
Txawm hais tias Ethernet cables tau dhau los ntawm ntau tiam neeg ntawm kev txhim kho kev nrawm, RJ45 txuas uas tshwm rau ntawm qhov kawg ntawm cov cables tsis tau hloov pauv. Txawm hais tias koj siv Qeb 3 txog Qeb 6 cables, cov khoom txuas yog RJ45. Qeb 7 cables tuaj yeem raug txiav nrog RJ45 connectors, tab sis lawv yog cov tshwj xeeb versions hu ua GigaGate45 (GG45). GG45 connectors yog rov qab tau tshaj RJ45 connectors.
Ethernet cables muaj cov ntsaws yas me me ntawm txhua qhov kawg uas tau muab tso rau hauv RJ45 jacks ntawm Ethernet li. Lub sij hawm ntsaws yog hais txog cable lossis txiv neej kawg ntawm kev sib txuas thaum lub sij hawm jack hais txog qhov chaw nres nkoj lossis poj niam kawg.
Plugs, Pins, thiab Crimping
RJ45 plugs muaj yim tus pins uas cov hlua ntawm lub cable txuas hluav taws xob. Txhua lub ntsaws muaj yim qhov chaw sib nrug li 1 hli sib nrug rau qhov uas ib tus neeg xaim tau ntxig siv cov cuab yeej tshwj xeeb cable crimping. Kev lag luam hu rau hom connector 8P8C, shorthand rau yim txoj hauj lwm, yim hu.
Ethernet cables thiab 8P8C connectors yuav tsum tau crimped rau hauv RJ45 thaiv cov qauv kom ua haujlwm zoo. Technically, 8P8C tuaj yeem siv nrog lwm hom kev sib txuas dua li Ethernet; Nws kuj tseem siv nrog RS-232 serial cables, piv txwv li. Txawm li cas los xij, vim tias RJ45 yog qhov tseem ceeb ntawm 8P8C, cov kws tshaj lij kev lag luam feem ntau siv ob nqe lus sib hloov.
Tib txwm hu xov tooj thiab broadband modems siv qhov hloov pauv ntawm RJ45 hu ua RJ45s, uas muaj ob qhov kev sib cuag hauv 8P2C teeb tsa tsis yog yim. Qhov sib luag ntawm lub cev zoo sib xws ntawm RJ45 thiab RJ45s ua rau nws nyuaj rau lub qhov muag tsis paub qhia rau ob leeg sib nrug. Txawm li cas los xij, lawv tsis hloov pauv.
RJ45S yog tus qauv qub uas tsis tau siv sijhawm ntev.
Txoj Pinouts ntawm RJ45 Connectors
Ob tus qauv RJ45 pinouts txhais qhov kev npaj ntawm ib tus neeg yim xaim xav tau thaum txuas cov txuas rau cable: T568A thiab T568B qauv. Ob leeg ua raws li lub rooj sib tham ntawm cov txheej txheem ntawm ib tug ntawm tsib xim (xim av, ntsuab, txiv kab ntxwv, xiav, los yog dawb) nrog tej kab txaij thiab cov khoom ua ke.
Ua raws li T568A lossis T568B lub rooj sib tham yog qhov tseem ceeb thaum koj tsim koj tus kheej cables kom ntseeg tau tias hluav taws xob sib raug zoo nrog lwm yam khoom siv. Yog tias koj tsis tsim koj tus kheej cov cables, koj tsuas yog yuav tsum tau txheeb xyuas tus qauv raug siv nrog koj cov khoom siv. Rau cov laj thawj keeb kwm, T568B yog tus qauv nrov dua, txawm tias qee lub tsev siv T568A version. Cov lus hauv qab no qhia txog cov xim coding ntawm cov xov hlau hauv cov khoom sib txuas.
| Pin | T568B | T568A |
|---|---|---|
| 1 | dawb nrog txiv kab ntxwv kab | dawb nrog kab txaij ntsuab |
| 2 | txiv kab ntxwv | ntsuab |
| 3 | dawb nrog kab txaij ntsuab | dawb nrog txiv kab ntxwv kab |
| 4 | blue | blue |
| 5 | dawb nrog xiav kab | dawb nrog xiav kab |
| 6 | ntsuab | txiv kab ntxwv |
| 7 | dawb nrog xim av kab | dawb nrog xim av kab |
| 8 | xim av | xim av |
Ntau lwm hom kev sib txuas zoo ib yam li RJ45, thiab lawv tuaj yeem yooj yim tsis meej pem nrog ib leeg. RJ11 connectors siv nrog xov tooj cables, piv txwv li, siv rau-txoj hauj lwm connectors es yim txoj hauj lwm connectors, ua rau lawv me ntsis nqaim dua RJ45 connectors. Tsis tas li ntawd, lawv saib zoo ib yam.
Qhov Teeb Meem Nrog RJ45s
RJ45 connectors tuaj nrog qee qhov teeb meem. Txhawm rau tsim kom muaj kev sib txuas nruj ntawm lub ntsaws thiab qhov chaw nres nkoj network, qee qhov RJ45 plugs siv cov khoom me me, khoov tau ntawm cov yas hu ua tab. Lub tab tsim kom nruj dua ntawm lub cable thiab qhov chaw nres nkoj ntawm kev ntxig, yuav tsum tau qis qis ntawm lub tab kom tshem tawm nws. Lub tab tiv thaiv ib lub cable los ntawm kev ua yuam kev los xoob. Cov tab no yooj yim tawg thaum khoov rov qab, uas tshwm sim thaum lub connector snags ntawm lwm lub cable, khaub ncaws, lossis lwm yam khoom nyob ze.
RJ45 connector feem ntau teeb meem tshwm sim thaum cov xov hlau tsis ua raws li tus qauv sau tseg. Cov neeg uas nyiam ua haujlwm ntawm lawv tus kheej cov cables thiab cov khoom sib txuas yuav tsum ua tib zoo saib xyuas cov kab txuas kom raug kom tsis txhob muaj teeb meem.
