Lub hwj chim dhau Ethernet (PoE) yog lub tshuab hluav taws xob siv hluav taws xob raws li thaj chaw hauv cheeb tsam network (LAN), uas tuaj yeem xa hluav taws xob thiab cov ntaub ntawv mus rau lub cuab yeej los ntawm lub network cable hauv Ethernet. Kev siv cov thev naus laus zis no tuaj yeem txo cov nqi khiav lag luam thiab txuag lub sijhawm ua haujlwm. Tam sim no, muaj ntau yam hloov pauv raws li PoE thev naus laus zis ntawm kev ua lag luam, feem ntau PoE keyboards, PoE + keyboards, thiab PoE ++ keyboards.Thov ua raws.JHA TECHkom nkag siab qhov sib txawv ntawm cov keyboards no.
PoE yog dab tsi? PoE hloov yog dab tsi?
PoE (tseem hu ua IEEE 802.3af tus qauv) yog tus qauv tshiab raws li Power over Ethernet system uas tau tshaj tawm los ntawm IEEE 802.3 pawg neeg ua haujlwm hauv xyoo 2003. Tus qauv qhia tias lub zog txais khoom siv (PD), xws li VoIP xov tooj. , tsuas yog yuav tsum tau siv ob lub twisted khub ntawm tib lub network cable kom tau txais lub zog thaum lub sij hawm tau txais lub hwj chim, thiab nws cov PoE lub zog noj tuaj yeem ncav cuag. 12.95 Wm.
PoE hloov, tseem hu ua PoE fais fab mov hloov, yog daim ntawv thov raws li PoE thev naus laus zis. Nws yog qhov hloov pauv uas tuaj yeem muab lub zog thiab cov ntaub ntawv xa mus rau lub chaw txais khoom tib lub sijhawm los ntawm lub network cable, thiab belongs rau cov khoom siv hluav taws xob hluav taws xob (PSE). Feem ntau hais lus, PoE hloov ua raws li tus qauv 802.3af tuaj yeem txhawb nqa lub zog siab tshaj plaws ntawm 15.4W ib qhov chaw nres nkoj, thiab lub zog hluav taws xob yog 44V-57V. Qhov hluav taws xob input ntawm PoE ntaus ntawv txuas nrog qhov hloov pauv no yog 37V-57V.
JHA-P10208CBM 8 PORT POE SWITCH
PoE + yog dab tsi? PoE + hloov yog dab tsi?
PoE + (tseem hu ua IEEE 802.3af tus qauv), raws li kev hloov kho rau PoE thev naus laus zis, yog PoE cov txheej txheem kev tshaj tawm hauv xyoo 2009. Nrog rau kev siv dav dav ntawm PoE thev naus laus zis, qee cov khoom siv hluav taws xob txais xws li wireless APs xav tau ntau lub zog. ua 12,95w. Txhawm rau daws qhov teeb meem no, IEEE 802.3 pab pawg ua haujlwm tau tshaj tawm PoE + thev naus laus zis tsim los muab lub zog ntau dua rau cov khoom siv.
PoE + hloov zoo ib yam li PoE hloov peb tau hais los saum toj no, thiab nws kuj muab lub zog rau PoE lub davhlau ya nyob twg los ntawm lub network cable. Qhov txawv yog tias qhov siab tshaj plaws fais fab mov rau txhua qhov chaw nres nkoj ntawm PoE + hloov yog 30W, thiab lub zog hluav taws xob yog 50V-57V. Lub zog siab tshaj plaws tau txais los ntawm cov khoom siv hluav taws xob tuaj yeem nce mus rau 25.5W, thiab qhov hluav taws xob tuaj yeem nce mus rau 42.5V-57V.
PoE++ yog dab tsi? Dab tsi yog qhov hloov pauv PoE ++?
Nrog kev txhim kho txuas ntxiv ntawm PoE daim ntawv thov kev lag luam, IEEE 802.3 tus qauv tau ntxiv IEEE 802.3bt tus qauv. Lub sijhawm no, PoE ++ thev naus laus zis kuj tau tshwm sim. Raws li IEEE 802.3bt tus qauv, PoE ++ thev naus laus zis muaj ob hom ceg. Ib qho PoE ++ thev naus laus zis hu ua Type3 tuaj yeem siv tau los ntawm ob lossis plaub qhov sib tw ntawm tib lub network cable, thiab tuaj yeem muab tau txog 51W ntawm cov khoom siv hluav taws xob rau lub tshuab txais hluav taws xob. Lwm qhov yog Type4PoE ++ thev naus laus zis, uas yuav tsum tau muab lub zog rau PoE Cov khoom siv davhlau ya nyob twg los ntawm txhua khub ntawm lub network cable, thiab lub zog nkag tuaj yeem ncav cuag 71W. Tsis tas li ntawd, muaj PoE thev naus laus zis raws li IEEE 802.3bt tus qauv hu ua UPOE (lub zog thoob ntiaj teb dhau Ethernet). Cov thev naus laus zis no yog tus tswv rau Cisco, thiab hom kev ua haujlwm zoo ib yam li Type3PoE thev naus laus zis (PoE ++), thiab lub zog tawm tswv yim uas tuaj yeem muab rau cov khoom siv kawg yog 51W. Yog li ntawd, qee cov neeg hauv kev lag luam tseem yuav suav UPOE li PoE ++.
Raws li kev hloov kho rau PoE keyboards thiab PoE + keyboards, PoE ++ keyboards tuaj yeem muab tau txog 60W ntawm lub hwj huam mov ib qhov chaw nres nkoj rau Type3PoE ++ keyboards, thiab 100W rau Type4. Xa mus rau lub rooj hauv qab no txhawm rau saib cov kev txwv tshwj xeeb ntawm PoE ++ keyboards thiab lwm ob hom keyboards.
| Hloov hom | PoE Hloov | PoE + Hloov | PoE++ Hloov | |
| IEEE Standard | IEEE 802.3 ua | IEEE 802.3 ua | IEEE 802.3 ib | |
| PoE Hom | Hom 1 | Hom 2 | Hom 3/UPOE | Hom 4 |
| Maximum input zog (PD) | 12.95 Wm | 25.5 wb | 51 wb | 71 wb |
| Maximum tso zis zog (Ethernet hloov) | 15.4 wb | 30 W | 60 W | 100 W |
| Cov zis hluav taws xob (Ethernet hloov) | 44-57 : kuv | 50-57 V | 50-57 V | 52-57 V |
| Input zog (PD) | 37-57 : kuv | 42.5-57V | 42.5-57V | 41.1-57 V |
| Txhawb Kab Pair | 2 sib | 2 sib | 2 paib, 4pa | 4 sib |
| Hom kab | Saum toj Cat3 | Saum Cat5 | Saum toj Cat3 | Saum toj Cat3 |
JHA-P420024B 24 PORTS POE++ SWITCH
Post lub sij hawm: Nov-13-2020
