Twisted-pair cables, uas paub txog cov kws tshaj lij IT niaj hnub, nrog kev pab los ntawm cov PCs tuaj yeem sib txuas, zais ib qho zoo kawg nkaus. Qhov tseeb yog tias tsis yog tsuas yog cov ntaub ntawv digital kwj tuaj yeem kis tau los ntawm lawv, tab sis kuj muaj hluav taws xob. Txhawm rau ua qhov no, cov khoom siv ntxiv yuav tsum tau siv - PoE adapters. Nyob rau tib lub sijhawm, muaj coob tus ntawm lawv ntau yam thiab txoj hauv kev los txuas cov cuab yeej no rau lub network. Dab tsi yog qhov tshwj xeeb ntawm cov cuab yeej no?
Cov ntaub ntawv siv cuab yeej yooj yim
PoE-adapter yog ib qho khoom siv uas siv lub peev xwm ntawm PoE thev naus laus zis, uas tso cai rau koj hloov lub zog mus rau cov cuab yeej xav tau los ntawm kev sib tw sib tw ua ke. Txawm li cas los xij, lub peev xwm ntawm Ethernet cable los pauv cov teeb liab digital tsis ploj, thiab lub network tseem ua haujlwm tau zoo.
Deciphering the abbreviation PoE - Fais fab dhau Ethernet. Ntawd yog, "powered los ntawm tus qauv Ethernet." Lub PoE adapter qee zaum hu ua "injector" - tab sis hom thib ob ntawm cov cuab yeej tseem yog qhov raug suav tias yog qhov hloov pauv ntawm thawj. Cia peb kawm txog qhov tshwj xeeb ntawm kev siv lub cuab yeej hauv nqe lus nug hauv cov ntsiab lus ntawm kev siv PoE-technology.
Ntau txog kev siv tshuab
Power dua Ethernet thev naus laus zis tso cai rau koj muab lub zog rau ntau hom khoom siv: Wi-Fi routers, koob yees duab, tsav. Lub ntsiab kom zoo dua ntawm cov cuab yeej no yog tias nws koom nrog kev siv ib txheej ntawm cov xov hlau - ob qho tib si rau kev tshaj tawm cov cim digital thiab muab hluav taws xob.
Vim li ntawd, thaum txhim kho cov tes hauj lwm, tsis tas yuav nteg cov xov hlau rau lub qhov (socket), nrog rau kev txhim kho cov khoom siv hluav taws xob ntxiv uas tsim nyog. Qee qhov xwm txheej, kev teeb tsa ntawm lub hwj chim cables tuaj yeem nyuaj los ntawm qhov tsis zoo ntawm lub cev qhov chaw ntawm lub network Cheebtsam. Piv txwv li, nws tshwm sim tias Wi-Fi adapter muab lub teeb liab zoo tshaj plaws ntawm ib qho chaw hauv lub tsev uas nws muaj teeb meem rau kev muab hluav taws xob. Tib yam tuaj yeem hais txog lub koob yees duab: qee zaum yuav tsum tau saib xyuas thaj chaw uas nyuaj rau muab lub zog.
PoE thev naus laus zis tso cai rau koj los teeb tsa kev sib txuas ntawm cov khoom siv rau lub qhov (socket), uas, raws li peb tau sau tseg saum toj no, tuaj yeem tso tawm cov khoom siv rau lub network thiab muab lub zog rau nws. Txoj hauv kev no tuaj yeem siv tau rau hauv cov ntaub ntawv ntawm kev txhim kho lub network infrastructure tam sim no. Nws muaj peev xwm muab hluav taws xob rau cov hluav taws xob uas twb muaj lawm.
Qhov zoo ntawm Technology
Yog li, yog tias peb sau cov txiaj ntsig tseem ceeb ntawm kev siv thev naus laus zis hauv nqe lus nug, lawv tuaj yeem tsim cov npe hauv qab no:
- kev siv tib lub cable yog ua tau ob qho tib si rau kev pub misfais fab mov, thiab rau kev sib pauv ntawm cov ntaub ntawv digital;
- tau txais txiaj ntsig kev lag luam cuam tshuam nrog qhov tsis xav tau rau nruab lub zog hluav taws xob thiab lwm yam khoom siv tsim nyog;
- qib siab ntawm kev ruaj ntseg ntawm lub network infrastructure ntawm hom tsim nyog tau ua tiav vim muaj cov qauv uas muab kev tiv thaiv tsim nyog ntawm cov khoom tiv thaiv hluav taws xob surges;
- nws muaj peev xwm los kho kom zoo dua tam sim no network infrastructure, npaj kev sib txuas lus hauv cov cheeb tsam uas yav tas los tsis tuaj yeem siv tau rau kev teeb tsa vim xav tau nteg hluav taws xob cables;
- nws muaj peev xwm los teeb tsa cov chaw taws teeb tswj ntawm cov khoom siv los ntawm cov txheej txheem network.
Tam sim no peb kawm cov qauv tseem ceeb ntawm lub hauv paus uas PoE tes hauj lwm ua haujlwm.
qauv
Cov txheej txheem tseem ceeb siv hauv kev teeb tsa cov txheej txheem sib xws yog IEEE 802.3af. Nws suav nrog kev suav nrog 2 hom khoom siv hauv lub network - cov khoom siv hluav taws xob thiab cov neeg siv khoom. Lawv tuaj yeem yog, raws li peb tau sau tseg saum toj no, Wi-Fi routers, network drives. Cov koob yees duab ua haujlwm zoo hauv cov tshuab no. Ntawm cov npe nrov tsim khoom lag luam uas tsim cov khoom siv uas PoE adapter tuaj yeem cuam tshuam yog Axis.
Cov khoom siv ntawm thawj hom - qhov chaw - tuaj yeem nyob ntawm qhov pib ntawm lub network lossis nruab nrab ntawm cov cuab yeej siv hluav taws xob thiab cov neeg siv khoom. Tus qauv hauv nqe lus nug tso cai rau kev muab lub zog dhau ntawm qhov tsis muaj kev sib tw twisted ntawm ntau chav kawm - tshwj xeeb, nws txhawb nqa 5,5e thiab 6 ntawm qhov hluav taws xob ntawm 48 V thiab kev siv hluav taws xob hauv 15 W. Nyob rau tib lub sijhawm, tsis muaj kev cuam tshuam rau qhov zoo ntawm cov ntaub ntawv digital xa mus rau cable, thiab kev txhim kho tseem ceeb ntawm kev tsim kho hauv network tam sim no nyob rau hauv cov ntsiab lus ntawm bandwidth tsis xav tau.
Voltage Methods
Ib lub zog dhau Ethernet network tuaj yeem muab hluav taws xob los ntawm ob txoj kev npaj.
Ua ntej, koj tuaj yeem siv cov teeb liab transformers cais raws li qhov siab ntawm qhov kawg ntawm cov kab. Cov khoom siv hluav taws xob yuav raug siv rau lawv cov kais dej hauv nruab nrab. Ib yam li ntawd, los ntawm lawv, tab sis nyob rau sab txais, qhov voltage yuav raug tshem tawm. Lub tshuab no tso cai rau koj siv tib khub ntawm cov xov hlau rau ob qho tib si tshaj tawm cov xov tooj cua zaus thiab xa hluav taws xob.
Thib ob, koj tuaj yeem siv cov khub dawb tam sim no nyob rau hauv cov kab ntawm cov khoom sib xws los hloov lub zog. Qhov no ua tau li cas? Qhov tseeb yog tias hauv kev xyaum, 2 tawm ntawm 4 khub uas nyob hauv Ethernet cable feem ntau tsis siv. Tau kawg, yog tias peb tab tom tham txog lawv txoj kev ua raws li 100 Base TX thev naus laus zis.
Qhov tshwj xeeb sau tseg ntawm lub koom haum ntawm lub network hauv hom PoE qhia tias cov yam ntxwv ntawm kev siv cov tshuaj txhaj tshuaj yuav nyob ntawm seb txoj kev twg, thawj lossis thib ob, qhov hluav taws xob tau xa mus. Yog li, lub peev xwm ntawm cov ntawv sau tseg 802.3af tus qauv tso cai rau kev xa hluav taws xob rau cov khub hauv pob 1, 2 lossis, piv txwv li, 4, 5 cables. Nyob rau hauv lem, injectors yuav ua tausiab tshaj 100 Base TX technology. Txawm li cas los xij, yog tias peb tab tom tham txog splitters, ces lawv yuav tsum ua haujlwm nrog ib qho ntawm cov phiaj xwm hloov hluav taws xob tau sau tseg saum toj no, txawm tias qhov sib txuas polarity yog thim rov qab.
Type of PoE Equipment
Muaj ntau chav kawm ntawm cov cuab yeej muaj peev xwm ua haujlwm hauv lub zog-dhau-twisted-pair hom. PoE adapter yog ib qho ntawm lawv (cov khoom siv sib txuas muaj ntau ntau yam - peb yuav kawm txog lawv qhov tshwj xeeb). Nrog rau nws, kuj tseem muaj PoE keyboards, nrog rau cov khoom siv siv. Hauv ntau qhov xwm txheej, lawv tuaj yeem ua ke rau hauv ib qho system. Cia peb kawm qhov tshwj xeeb ntawm txhua yam ntawm cov cuab yeej sau tseg kom ntxaws ntxiv.
Kev siv khoom siv
Kev siv cov khoom siv yog, qhov tseeb, tib lub network khoom siv uas tau siv los ntawm ob khub twisted. Lawv cov yam ntxwv tseem ceeb yog qhov input impedance. Qhov ntsuas qhov sib thooj feem ntau yog txiav txim siab hauv thaj tsam ntawm 19-26.5 kOhm. Raws li txoj cai, lub capacitor kuj tseem muaj nyob rau hauv cov qauv ntawm cov neeg siv khoom sib txuas.
Switches
Lub PoE hloov yog tsim los xyuas kom meej kev ua haujlwm ntawm lub network nyob rau hauv cov nqe lus ntawm kev lees paub qhov tseeb ntawm kev sib txuas ntawm cable mus rau cov ntsiab lus. Kev sib txuas ntawm hom sib txuas ua haujlwm raws li 802.3af raws tu qauv, uas peb tau hais los saum toj no, nrog rau 802.3at. Lawv tso cai rau koj los xyuas kom meej qhov kev sib cuam tshuam ntawm ntau yam khoom siv nyob rau hauv cov xwm txheej ntawm lub zog muaj zog. Yog tias koj tsis siv PoE hloov, ces muaj qhov ua tau vim qhov hloov pauv tam sim no nyob rau hauv cov khub twisted, cov neeg siv khoom yuav tawm mus.tsev.
Adapters
Cov khoom siv ntawm hom lus nug, raws li peb tau sau tseg saum toj no, muab faib ua ntau yam ntxiv. Yog li, PoE adapter tuaj yeem yog lub hwj chim adapter. Nws cov qauv muaj cov khoom siv hluav taws xob, nrog rau cov khoom sib txuas, uas tuaj yeem nruab nrog kev sib cais ntawm cov galvanic thiab qhov no zoo li lub thawv me me los yog cov hlau tsis tu ncua. Lub PoE fais fab adapter yog qee zaum hu ua lub injector. Muaj ntau ntau txoj kev daws teeb meem ntawm hom no nyob rau hauv khw Lavxias teb sab. Piv txwv li, PoE TP Link 150S adapter yog nrov. Cov yam ntxwv tseem ceeb tshaj plaws ntawm cov cuab yeej ntawm cov khoom siv sib xws yog qhov ntsuas hluav taws xob ruaj khov. 48 V yog suav hais tias yog qhov taw qhia zoo tshaj plaws, yog tias peb tham txog cov qauv ntaus cim los ntawm TP Link.
Lwm hom PoE adapter yog qhov tau txais. Txawm li cas los xij, nws kuj tseem siv tau los muab lub zog rau cov khoom siv uas siv cov twisted khub, tab sis tsuas yog cov uas tsis koom nrog pawg ntawm cov neeg siv khoom. Txhawm rau kom cov khoom siv no ua haujlwm, nws yog qhov xav tau tias nws lub zog tsis tshaj 24 watts. Nws tuaj yeem raug sau tseg tias nyob rau hauv cov chav kawm suav nrog cov khoom siv, cov cuab yeej uas muaj nyob rau hauv qeb ntawm splitters yog qhov txawv. Qhov tseeb, lawv tuaj yeem raug cais raws li cov neeg siv khoom siv.
Yog tias peb tham txog PoE adapters, uas yog splitters, lawv tau tsim los ua haujlwm nrog lwm yam khoom siv - PoE-Switch. Ntawd yog, lawv lub luag haujlwm tseem ceeb yog kev faib cov ntaub ntawv hauv network rau hauv cov kwj deg rau lub hom phiaj ntawm kev txhais lus tom ntej rau cov khoom siv uas tsis koom nrog hauv qeb ntawm cov khoom siv. Splitters yog lub luag hauj lwm rau kev hloov cov voltage uas muab rau lawv mus rau cov theem uas zoo rau cov cuab yeej zaum kawg - piv txwv li, cov no tuaj yeem yog cov cim ntawm 5, 12 lossis 48 V.
Nyob rau hauv lem, splitters kuj muab faib ua ob hom - nquag thiab passive. Raws li rau yav dhau los, lawv tuaj yeem ua haujlwm ob qho tib si nrog cov keyboards thiab nrog lub hwj chim adapters. Cov khoom siv xws li, piv txwv li, DWL-P50 hom splitter los ntawm D-Txuas. Ib qho PoE adapter cais raws li cov cuab yeej ntawm hom lus nug kuj tuaj yeem ua tsis tau. Lawv tsuas tuaj yeem ua haujlwm nrog cov tshuaj txhaj tshuaj. Tib lub sijhawm, raws li cov kws tshaj lij sau tseg, feem ntau lawv muag ua ke nrog lawv hauv ib txheej.
Nuances of use adapters
Nrog rau kev sib txuas kom raug ntawm cov khoom siv hluav taws xob uas siv Power over Ethernet thev naus laus zis, yuav tsum tsis muaj teeb meem nrog lub koom haum network. Tab sis qee qhov teeb meem, vim qhov tshwj xeeb ntawm cov qauv siv hauv cov tshuab zoo li no, tseem tuaj yeem tshwm sim. Yog li, piv txwv li, PoE-Switch tuaj yeem txiav txim siab tias qhov chaw nquag tsis yog cov neeg siv khoom siv, thiab lub network tuaj yeem poob lub zog ib ntus vim qhov tseeb tias lub tshuab hluav taws xob tsis siv neeg siv hauv qhov system. Nws yog tsim nyog, nyob rau hauv lem, hloov nws nrog ib tug active ib tug. Lwm qhov teeb meem tshwm sim yog hluav taws xob hluav taws xob thaum sim txuas tus neeg siv khoom siv rau qhov hloov. Koj tuaj yeem daws nws los ntawm kev txhim kho ib qho khoom siv ntxiv - PoE converter.
Qhov tseeb nthuav yog tias los ntawm qhov pom ntawm tus nqi ntawm kev lag luam uas tau muab tso rau hauv lub network, nrog tus lej me me.siv cov khoom siv, nws muaj txiaj ntsig ntau dua los siv cov khoom siv passive, nrog rau ib qho loj - nquag sawv daws yuav. Qee tus kws tshaj lij IT ntseeg tias tom qab tus naj npawb ntawm cov ntsiab lus nkag tau dhau 3, cov khoom siv hluav taws xob tuaj yeem siv tau.
zoo cable hom
Fais fab hauv Is Taws Nem thev naus laus zis suav nrog kev siv cov kab sib tw twisted. Tab sis lawv yog, raws li koj paub, ntawm ntau hom - piv txwv li, nrog 2 thiab 4 khub. Qhov twg yog qhov zoo tshaj plaws rau kev teeb tsa ntawm cov tes hauj lwm ntawm cov khoom sib xws? Raws li cov kws tshaj lij, lub kaw lus yuav khaws cov haujlwm ua haujlwm thaum siv txhua hom cable. Tab sis yog tias peb tab tom tham txog qhov hnyav ntawm qhov hloov pauv - piv txwv li, yog tias siv tag nrho nws cov chaw nres nkoj, ces lub cable nrog 4 khub yog qhov kev xaiv zoo tshaj plaws.
