1. Kev txiav txim siab tseem ceeb rau kev xaiv PoE hloov
1. Xaiv tus qauv PoE hloov
Hauv kab ntawv PoE yav dhau los, peb tau hais tias tus qauv PoE fais fab mov hloov tuaj yeem kuaj xyuas seb lub davhlau ya nyob twg hauv lub network yog PD ntaus ntawv uas txhawb nqa PoE fais fab mov.
Cov khoom tsis yog tus qauv PoE yog cov khoom siv hluav taws xob muaj zog hom network cable fais fab khoom siv, uas muab lub zog sai li sai tau thaum nws qhib.Yog li ntawd, ua ntej kom paub tseeb tias qhov hloov pauv koj yuav yog tus qauv PoE hloov, thiaj li tsis txhob hlawv lub koob yees duab pem hauv ntej.
2. Cov khoom siv fais fab
Xaiv lub PoE hloov raws li lub zog ntaus ntawv.Yog tias lub zog ntawm koj lub koob yees duab soj ntsuam tsawg dua 15W, koj tuaj yeem xaiv PoE hloov pauv uas txhawb nqa tus qauv 802.3af;Yog tias lub zog ntawm lub cuab yeej ntau dua 15W, ces koj yuav tsum xaiv qhov hloov pauv PoE ntawm tus qauv 802.3at;Yog tias lub zog ntawm lub koob yees duab siab tshaj 60W, koj yuav tsum xaiv 802.3 BT tus qauv hloov hluav taws xob siab, txwv tsis pub lub hwj chim tsis txaus, thiab cov khoom siv pem hauv ntej tsis tuaj yeem nqa tau.
3. Tus naj npawb ntawm cov chaw nres nkoj
Tam sim no, feem ntau muaj 8, 12, 16, thiab 24 chaw nres nkoj ntawm PoE hloov ntawm lub khw.Yuav ua li cas xaiv nws yog nyob ntawm tus naj npawb thiab lub zog ntawm lub koob yees duab pem hauv ntej-kawg txuas los xam cov lej tag nrho.Tus naj npawb ntawm cov chaw nres nkoj nrog lub zog sib txawv tuaj yeem muab faib thiab sib xyaw ua ke raws li tag nrho cov khoom siv hluav taws xob hloov pauv, thiab 10% ntawm cov chaw nres nkoj network tau tshwj tseg.Ua tib zoo xaiv PoE ntaus ntawv uas nws lub zog tso zis ntau dua li tag nrho lub zog ntawm lub cuab yeej.
Ntxiv rau qhov ua tau raws li qhov xav tau ntawm lub zog, qhov chaw nres nkoj yuav tsum ua kom tau raws li kev sib txuas lus, tshwj xeeb tshaj yog qhov kev ncua deb (xws li ntau tshaj 100 meters).Thiab nws muaj lub luag haujlwm ntawm kev tiv thaiv xob laim, tiv thaiv electrostatic, tiv thaiv kev cuam tshuam, kev tiv thaiv cov ntaub ntawv, tiv thaiv tus kab mob kis thiab kev tawm tsam hauv network.
Kev xaiv thiab teeb tsa ntawm PoE keyboards
PoE hloov nrog cov lej sib txawv ntawm cov chaw nres nkoj
4. Chaw nres nkoj bandwidth
Qhov chaw nres nkoj bandwidth yog qhov qhia tau yooj yim ntawm kev hloov pauv, cuam tshuam txog kev sib txuas network kev ua haujlwm ntawm qhov hloov.Cov keyboards feem ntau muaj cov bandwidths hauv qab no: 10Mbit / s, 100Mbit / s, 1000Mbit / s, 10Gbit / s, thiab lwm yam. Thaum xaiv qhov hloov pauv PoE, nws yog qhov yuav tsum tau ua ntej kwv yees cov tsheb khiav ntawm ntau lub koob yees duab.Thaum xam, yuav tsum muaj ib tug margin.Piv txwv li, 1000M hloov tsis tuaj yeem kwv yees tag nrho.Feem ntau, kev siv tus nqi yog li 60%, uas yog hais txog 600M..
Saib ntawm ib qho kwj raws li lub koob yees duab network uas koj siv, thiab tom qab ntawd kwv yees pes tsawg lub koob yees duab tuaj yeem txuas nrog lub hloov pauv.
Piv txwv li, ib qho code kwj ntawm 1.3 lab-pixel 960P lub koob yees duab feem ntau yog 4M,
Yog tias koj siv 100M hloov, koj tuaj yeem txuas 15 teeb (15 × 4 = 60M);
Nrog Gigabit hloov, 150 units (150 × 4 = 600M) tuaj yeem txuas nrog.
Lub koob yees duab 2-megapixel 1080P feem ntau muaj ib qho kwj ntawm 8M.
Nrog 100M hloov, koj tuaj yeem txuas 7 teeb (7 × 8 = 56M);
Nrog lub gigabit hloov, 75 teeb (75 × 8 = 600M) tuaj yeem txuas nrog.
5. Backplane bandwidth
Backplane bandwidth hais txog qhov siab tshaj plaws ntawm cov ntaub ntawv uas tuaj yeem ua haujlwm ntawm qhov hloov pauv interface processor lossis daim npav interface thiab cov ntaub ntawv npav.
Lub backplane bandwidth txiav txim siab cov ntaub ntawv ua muaj peev xwm ntawm qhov hloov.Qhov siab dua qhov backplane bandwidth, lub peev xwm ua tau cov ntaub ntawv muaj zog dua thiab ceev cov ntaub ntawv pauv ceev;txwv tsis pub, qhov qeeb ntawm cov ntaub ntawv pauv ceev.Cov qauv kev suav ntawm backplane bandwidth yog raws li nram no: Backplane bandwidth = tus naj npawb ntawm cov chaw nres nkoj × chaw nres nkoj tus nqi × 2.
Piv txwv suav: Yog tias qhov hloov pauv muaj 24 qhov chaw nres nkoj, thiab qhov ceev ntawm txhua qhov chaw nres nkoj yog gigabit, ces qhov backplane bandwidth = 24 * 1000 * 2 / 1000 = 48Gbps.
6. Pob ntawv xa tawm tus nqi
Cov ntaub ntawv hauv lub network yog tsim los ntawm cov ntaub ntawv pob khoom, thiab kev ua haujlwm ntawm txhua pob ntawv siv cov peev txheej.Kev xa tawm tus nqi (tseem hu ua throughput) yog hais txog tus naj npawb ntawm cov ntaub ntawv pob ntawv uas dhau los ntawm ib chav tsev ntawm lub sijhawm yam tsis muaj pob ntawv poob.Yog tias qhov kev xa tawm me me dhau lawm, nws yuav dhau los ua lub network tsis muaj zog thiab cuam tshuam tsis zoo rau kev sib kis ntawm tag nrho lub network.
Cov mis rau cov pob ntawv xa mus yog raws li hauv qab no: Throughput (Mpps) = Tus naj npawb ntawm 10 Gigabit ports × 14.88 Mpps + Tus naj npawb ntawm Gigabit ports × 1.488 Mpps + Tus naj npawb ntawm 100 Gigabit ports × 0.1488 Mpps.
Yog hais tias qhov kev ntsuas dhau los tsawg dua qhov kev hloov pauv ntawm qhov hloov pauv, kev hloov pauv ntawm cov xaim ceev tuaj yeem ua tiav, uas yog, tus nqi hloov mus txog cov ntaub ntawv xa mus ceev ntawm cov kab sib kis, yog li tshem tawm cov kev hloov pauv mus rau qhov loj tshaj plaws.
Post lub sij hawm: Jun-09-2022