Kab lus, hauv daim ntawv nug-thiab-lus nrov, tham txog cov ntsiab lus tseem ceeb thaum siv lub zog ntawm PoE (Power over Ethernet). Qhov sib txawv ntawm cov qauv yog muab, cov ntaub ntawv yog muab los ntawm kev tiv thaiv cov cuab yeej los ntawm kev nce siab thiab lwm yam tseem ceeb.
PoE yog dab tsi?
PoE (Power dua Ethernet) yog ib qho cuab yeej siv los muab lub zog rau cov neeg siv khoom siv los ntawm kev sib tw ua ke Ethernet cable (feem ntau yog siv cat.5 cable nrog RJ45 connectors). Tib lub cable yog siv ob qho tib si rau cov ntaub ntawv xa mus thiab rau lub zog ntawm lub cuab yeej.
Cov khoom siv twg tau txais kev txhawb nqa?
Cov hauv qab no tuaj yeem ua raws li cov khoom siv hluav taws xob:
- hloov,
- routers,
- thiab lwm yam khoom siv network.
Cov hauv qab no tuaj yeem siv los ua cov neeg siv khoom siv:
- xov tooj wired,
- koob yees duab video,
- cov ntsiab lus nkag,
- ntau yam sensors thiab lwm yam khoom siv peripheral.
Kuj tseem muaj cov khoom siv rau kev koom ua ke nrog cov khoom siv uas tsis txhawb nqa
PoE.
Qhov no yog dab tsi rau?
Raws li tus kws sau paj lug Vladimir Mayakovsky sau: "Yog hais tias lub hnub qub ci, nws txhais tau tias ib tug neeg xav tau nws." Hauv qab no yog cov txiaj ntsig ntawm kev siv tshuab no.
Txuas cov khoom siv hauv qhov chaw nyuaj mus cuag
Piv txwv li, ntawm tus neeg siv qhov chaw ua haujlwm tsuas muaj ob lub qhov (socket): rau lub monitor thiab lub system unit. Feem ntau cov kev cai zoo li no tsis tshwm sim vim yog kev ua yuam kev hauv kev npaj, tab sis raug txiav txim los ntawm kev lag luam, cheeb tsam thiab lwm yam qauv rau IT kev ruaj ntseg, kev nyab xeeb hluav taws, kev nyab xeeb kev ua haujlwm thiab lwm yam.
Lwm qhov piv txwv yog yog tias lub koob yees duab yees duab lossis qhov chaw nkag tau teeb tsa hauv qab lub qab nthab, nws tuaj yeem nyuaj rau txuas lub hwj chim cable nyob ntawd thiab.
Kev Tswj Xyuas Khoom Noj
Qhov txiaj ntsig thib ob yog PoE tso cai rau koj los tswj cov cuab yeej raws li lub zog, piv txwv li, kaw ib ntus, qhib, lossis rov pib dua (thaum khov, hloov kho, lossis xav tau lwm yam).
Qhov no yooj yim yog tias koj yuav tsum ua haujlwm nyob deb, lossis thaum cov khoom siv nyob rau hauv qhov chaw nyuaj mus txog.
Qhov no yog qhov tshwj xeeb tshaj yog thaum ua haujlwm nrog cov ntsiab lus nkag uas yuav nyob ntawm qhov deb lossis txawm tias muab zais rau qhov twg saum lub qab nthab cuav.
ΠΡΠΈΠΌΠ΅ΡΠ°Π½ΠΈΠ΅. Yuav luag txhua cov ntsiab lus niaj hnub nkag los ntawm Zyxel txhawb PoE
thiab suav nrog cov qauv tshiab nrog kev txhawb nqa rau Wi-Fi 6: raws li feem ntau "pob nyiaj" thiab siab dua ΠΈ
Daim duab 1. NWA802.11AX dual-band 6ax (Wi-Fi 110) nkag mus.
Kev kho yooj yim
Ntxiv rau qhov yooj yim ntawm kev siv, kev siv PoE tso cai rau koj los daws qhov mob taub hau ntawm kev yuav khoom thiab kho cov khoom siv hluav taws xob, muab cov neeg siv nrog lub qhov (socket), piv txwv li, los ntawm kev yuav khoom ntawm PDUs (hauv lwm lo lus, "nqa splitters"). Cov nodes tsawg dua txhais tau tias tsawg dua cov ntsiab lus tsis ua haujlwm txhais tau tias tsawg dua hu rau kev txhawb nqa.
hluav taws xob kev nyab xeeb
Tsis muaj teeb meem dab tsi leej twg hais, 220 Volts yog ntau heev. Nws mob, nws tua. Tab sis 57 volts, uas yog qhov siab tshaj plaws rau PoE, kuj yog qhov tsis txaus ntseeg, tab sis tsis ntau. Hauv qee lub koom haum, txhawm rau kom tus thawj tswj hwm tseem ua haujlwm ntawm tus kws hluav taws xob, yuav tsum muaj daim ntawv tso cai tshwj xeeb. Qhov no yog tswj los ntawm tib yam kev lag luam thiab cov qauv hauv cheeb tsam. Thiab nrog PoE, peb yeej tsis paub dab tsi zoo li no. Ib qho tsis muaj zog yog qhov tsis muaj zog.
Kev zoo nkauj
Cov neeg ua haujlwm technical xav tau dab tsi ntau tshaj? Yog tias tsuas yog nws ua haujlwm. Tab sis qee qhov tshwj xeeb tshaj yog "cov phooj ywg" xav tau nws "zoo nkauj" thiab. Piv txwv li, yog li ntawd "ntxiv" cov xov hlau tsis tau dai. Los yog kom txhua yam yog tib xim. Thiab PoE tshem tawm cov "ntxiv" cov neeg xyuas pib. Ntau hom kev soj ntsuam, commissions thiab "tus thawj coj loj" tshwj xeeb tshaj yog rau qhov no.
Dab tsi yog qhov tsis zoo ntawm PoE?
Tus nqi siab dua ntawm cov khoom siv
Qhov tseeb, nws raug nqi ntau dua. Tshwj xeeb tshaj yog tias koj siv ntau dua lossis tsawg dua cov cuab yeej pov thawj, thiab tsis txhob cia siab rau "tej zaum", yuav "cov kev daws teeb meem pheej yig NoName".
Ntawm qhov tod tes, lub hauv paus ntsiab lus " kim dua txhais tau tias zoo dua " tsis tas yuav ua haujlwm. Yog li ntawd, nws ua rau kev txiav txim siab mus yos hav zoov rau lub npe kim tsuas yog tias muaj cov kev xav tau ntxiv (muaj ib daim ntawv teev npe "cov cuab yeej pom zoo").
Tab sis txawm tias tus nqi siab ntawm cov khoom siv nrog PoE, nws tus nqi tuaj yeem qis dua li kev txhim kho cov kab txuas ntxiv los ntawm kos mus rau cov khoom siv hluav taws xob tej thaj chaw deb.
Lub hwj chim poob
Thaum xa cov teeb liab hluav taws xob tsawg los ntawm cov xov hlau nyias, qhov ua tau zoo, cia peb hais, yuav tsis zoo heev. Qhov deb koj nyob ntawm cov khoom siv hluav taws xob, qhov hluav taws xob tsawg dua yuav raug tso rau cov neeg siv hluav taws xob. Tus so yog siv rau kev tiv thaiv thiab cua sov ntawm cov xov hlau. Nrog lub zog hauv zos (tsis yog PoE) qhov xwm txheej yooj yim dua. Kuv muab lub hwj chim tso rau hauv lub qhov (socket) "thiab lub zog mus, mus ... "
Txawm li cas los xij, cov teeb meem nyob deb li no tuaj yeem daws tau los ntawm kev siv cov keyboards tshwj xeeb nrog cov teeb liab ntxiv zog, piv txwv li, Zyxel series [GS1300] () thiab .
Cov kev xav tau rau cov neeg ua haujlwm tsim nyog
Cia peb hais tias txawm tias kev siv PoE tsis xav tau kev paub zoo, qee cov ntsiab lus
yuav tsum tau mastered. Cov ntaub ntawv ntawm qhov teeb meem no tuaj yeem pom yam tsis muaj teeb meem ntau, txawm hais tias ib tus neeg tsis tau ua haujlwm nrog cov thev naus laus zis no, nws yuav ntsib qee cov ntaub ntawv kev kawm uas tawg thiab tawg.
PoE Standards
Rau cov neeg tshiab, tej zaum yuav muaj qee qhov tsis meej pem. Muaj 3 tiam
txheem:
Thawj tiam PoE (IEEE 802.3af tus qauv) muab txog 15,4 W DC lub zog rau txhua lub cuab yeej txuas.
Qhov thib ob tiam IEEE 802.3at tus qauv, tseem hu ua PoE +, tuaj yeem xa mus txog 30 W ntawm lub zog rau ib lub cuab yeej. Cov qauv no yog siv los txhawb cov neeg siv khoom siv hluav taws xob ntau dua, xws li Pan-Tilt-Zoom (PTZ) cov koob yees duab soj ntsuam thiab 11n wireless nkag mus.
Txhawm rau kom yooj yim rau kev nkag siab, qhov sib txawv tseem ceeb tau sau tseg hauv cov lus:
tsis
POE
PoE +
DC voltages ntawm lub tshuab fais fab
Los ntawm 36 rau 57V (nominal 48V)
42,5 rau 57 V
Qhov chaw voltage
44 rau 57 V
50 rau 57 V
Lub zog siab tshaj plaws ntawm PoE qhov chaw
15,4 W
30 W
Lub zog siab tshaj plaws tau txais los ntawm cov neeg siv khoom PoE
12,95 W
25,50 W
Qhov siab tshaj plaws tam sim no
350 mA
600 mA
Kev tiv thaiv kab mob siab tshaj plaws
20 Ohm (rau cat.3)
12,5 Ohm (rau cat.5)
Cov chav kawm noj zaub mov
0-3
0-4
Lub cim thib peb tau piav qhia los ntawm IEEE 802.3bt tus qauv.
Cov khoom siv thib peb PoE tuaj yeem muab lub zog mus txog 51 W dhau ib kab.
Nco ntsoov. Rau cov khoom siv hluav taws xob siv IEEE 802.3bt tus qauv thev naus laus zis. Tag nrho yim tus neeg xyuas pib ntawm ib lub xov tooj sib tw niaj hnub (miv. 5 thiab siab dua) yog siv, thaum thawj ob tiam koj tuaj yeem tau txais los ntawm tsuas yog plaub.
Hais txog kev sib raug zoo, PoE cov cuab yeej rov qab tau tshaj - qhov muaj zog dua 802.3bt fais fab mov tuaj yeem siv rau cov neeg siv khoom qub PoE thiab PoE + (802.3af, thiab 802.3at).
Terminology: End-span thiab Mid-Span
Xaus-span - ib qho khoom siv uas muab hluav taws xob los ntawm qhov pib ntawm lub cable
kab.
Ib qho piv txwv classic: IP xov tooj hloov pauv muab lub zog rau lub network me me ntawm cov xov tooj hauv xov tooj hauv ib lub chaw ua haujlwm.
Lwm qhov piv txwv yog kev soj ntsuam video hauv lub tsev qiv ntawv me, qhov twg cov koob yees duab video tau txais lub zog los ntawm kev hloov ntawm PoE
Feem ntau, cov tshuab zoo li no tsis muab cov cuab yeej siv ntxiv los ua kom cov khoom siv hluav taws xob.
Nruab nrab - thaum lub hwj huam mov txuas tsis yog los ntawm qhov pib ntawm txoj kab hluav taws xob, tab sis ntxiv ntawm qhov hloov mus thiab qhov kawg ntaus ntawv. Piv txwv li, powering lub koob yees duab yees duab los ntawm ib tug injector, uas yog qhib tom qab lub hloov nyob rau hauv lub intermediate cross-connect txee.
Ib me ntsis ntxiv terminology:
- PSE (Cov Khoom Siv Hluav Taws Xob) - khoom siv hluav taws xob.
- PD (Powered Device) - khoom siv fais fab.
Cov khoom siv hluav taws xob puas tuaj yeem nkag siab cov neeg siv khoom siv txuas nrog: nrog lossis tsis muaj PoE?
Yog hais tias peb tab tom tham txog End-span, piv txwv li, txog kev hloov, txhua yam tshwm sim tsis yog yooj yim, tab sis yooj yim heev. Lub zog hluav taws xob, xws li hloov pauv nrog PoE cov chaw nres nkoj, tig lub zog rau qhov chaw nres nkoj tsuas yog tias lub cuab yeej txuas nrog (xws li qhov chaw nkag) txhawb PoE.
Ua li cas nws ua hauj lwm?
- Ua ntej, ib qho kev kuaj xyuas: seb tus neeg siv khoom puas txhawb nqa lub zog ntawm PoE. Ib qho hluav taws xob ntawm 2,8 mus rau 10 Volts yog siv, thiab qhov kev tawm tsam yog txiav txim siab. Nyob rau hauv rooj plaub uas cov txiaj ntsig tau txais tuaj yeem suav tias yog qhov txaus siab rau cov khoom siv hluav taws xob ntawm PoE, cov khoom siv hluav taws xob txuas mus rau theem tom ntej.
- Cov cuab yeej siv hluav taws xob txiav txim siab lub zog xav tau los siv lub zog rau cov neeg siv khoom siv, rau kev tswj hwm lub zog tom qab no. Nyob ntawm qib ntawm kev noj, cov khoom siv tau muab rau hauv chav kawm: los ntawm 0 txog 4.
Txawm li cas los xij, yog tias peb tab tom tham txog pheej yig Mid-Span cov cuab yeej txuas nrog tom qab cov cuab yeej siv sib txuas (tsis muaj PoE), txhua yam tsis yog rosy. Nyob rau hauv tas li ntawd, ib tug tas mus li lub hwj chim mov uas tsis tas yuav tsum tau muab rau cov kab, thiab ib tug kos rau "Dab tsi yog ib tug ntaus ntawv nyob rau hauv lwm kawg ntawm kab?" yog tsis ua.
Yuav ua li cas thaum koj xav tau txuas cov khoom siv yam tsis muaj kev txhawb nqa PoE, tab sis tsis muaj qhov hluav taws xob rau lub hwj chim adapter?
Rau cov xwm txheej zoo li no nws yog siv Passive PoE siv PoE splitter.
Nyob rau hauv cov ntaub ntawv no, lub hwj chim mov tsis soj ntsuam cov khoom txuas nrog thiab tsis phim nws lub hwj chim. Lub zog tsuas yog muab los ntawm cov neeg siv khoom sib tw dawb uas siv PoE splitter.
Ib qho PoE splitter faib cov teeb liab nkag mus rau hauv cov ntaub ntawv thiab lub zog (12V-24V). Qhov no ua rau nws muaj peev xwm muab lub zog thiab sib koom ua ke ib lub cuab yeej yam tsis muaj kev txhawb nqa PoE rau hauv cov txheej txheem uas twb muaj lawm. Nrog rau txoj kev sib txuas no, nws yog ib qho tsim nyog yuav tsum ua tib zoo xaiv lub zog ntawm lub zog thiab nws cov neeg siv khoom.
Yuav ua li cas yog tias nws yog lwm txoj hauv kev? Xav tau txuas PD (PoE tus neeg siv khoom siv) rau cov khoom siv hauv network?
Txhawm rau siv cov khoom siv hluav taws xob nrog PoE, koj tuaj yeem siv PoE injector, uas yog tsim los muab lub zog ntxiv rau lub network cable.
Lub PoE injector muaj RJ45 connector ntawm lub tswv yim thiab lub connector rau txuas mus rau lub hwj chim qhov chaw. Ntawm cov zis nws muaj ib qho RJ45 txuas nrog PoE.
PoE injector lees txais cov qauv teeb liab hauv lub network thiab txhaj lub zog rau hauv cov kab sib txuas hauv lub network, uas tso cai rau koj los txuas cov khoom siv PoE ntawm cov zis.
Daim duab 2. Zyxel PoE injector
Dab tsi yog cov kev cai cable?
Rau kev sib txuas thaum powered ntawm PoE, ib tug twisted khub cable ntawm tsawg kawg yog cat.5e yog siv.
ib qho tseem ceeb. Cov neeg siv yuav tsum yog tooj liab, tsis yog tooj liab-plated, thiab tsawg kawg yog 0,51 hli (24 AWG) tuab. Qhov tsis kam ntawm cov conductors yuav tsum tsis pub tshaj 9,38 Ohm / 100 m.
Hauv kev xyaum, nws feem ntau pom zoo kom tsis txhob siv cov cables ntev dua 75m, txawm hais tias 802.3af thiab 802.3at qauv txhawb nqa 100m. Nyob rau hauv cov ntaub ntawv ntawm Passive PoE, cov tswv yim pom zoo txawm ntau pessimistic - qhov tseeb cable ntev rau ib txwm ua hauj lwm yuav tsum tsis txhob ntau tshaj 60m.
Txawm li cas los xij, cov keyboards tshwj xeeb, xws li kev tswj hwm tuaj yeem txhawb cov khoom siv ntawm qhov deb ntawm 250m ntawm qhov ceev ntawm 10Mb / s.
Daim duab 3. Daim duab qhia txog qhov Extended Range ua haujlwm li cas.
Dab tsi yog surge Protection (SPD)?
Nyob rau hauv ib qho kev txuas hluav taws xob txuas ntxiv, muaj kev hem thawj ntawm lub sij hawm luv luv impulses tshwm sim los ntawm tsub zuj zuj ntawm cov nqi (ua kom muaj peev xwm sib txawv - overvoltage) ua raws li kev tso tawm. Hauv qab no yog cov laj thawj rau qhov tshwm sim ntawm luv luv overvoltage pulses.
- Ib qho hluav taws xob tawm tsam ze ntawm ib qho khoom, suav nrog tus pas nrig, ua rau hluav taws xob impulse thiab electromagnetic cuam tshuam, uas tsim ib qho induced emf nyob rau hauv lub cable.
- Kev sib xyaw ntawm cov hluav taws xob zoo li qub los ntawm huab cua ionization thiab lwm yam tshwm sim sab nraud ua rau cov tsos ntawm cov hluav taws xob zoo li qub uas tuaj yeem ua rau cov khoom puas.
- Overvoltages vim hloov thiab hloov cov khoom siv, piv txwv li, hloov cov kab hluav taws xob nyob rau hauv crossover, tig rau cov khoom siv hluav taws xob ntxiv, tig rau thiab tawm lub zog muaj zog ua rau muaj qhov tshwm sim ntawm cov txheej txheem hloov pauv hauv cov hluav taws xob hluav taws xob nrog cov ntse surges hauv cov hluav taws xob, uas. tuaj yeem ua rau cov khoom siv tsis ua haujlwm.
Nco tseg. Vim muaj ntau yam laj thawj: xob laim nyob ze ntawm ib qho khoom thaum muaj cua daj cua dub, nrog rau ionization ntawm huab cua thiab cov khoom siv hluav taws xob hauv huab cua ua ntej cua daj cua dub, hom kev tiv thaiv no qee zaum hu ua "kev tiv thaiv xob laim." Lo lus no yuav tsum tsis txhob totaub nrog lo lus "kev tiv thaiv xob laim" - uas yog, nrog kev tiv thaiv los ntawm xob laim ncaj qha.
Txhawm rau tiv thaiv cov kev hem thawj no, surge voltage tiv thaiv cov cuab yeej (SPDs) yog siv. Muaj ob txoj kev tiv thaiv kev tiv thaiv (SPDs): kev yuav khoom thiab txhim kho cov khoom siv sab nraud thiab kev tiv thaiv lub tsev rau hauv PoE cov khoom siv.
Thiab thaum kawg, cov lus teb rau lo lus nug: cov khoom siv twg xaiv?
Xaiv lub hwj huam mov
Thaum tham txog kev xaiv ib qho khoom siv rau PoE fais fab, lawv txhais tau tias qhov kawg, thiab feem ntau qhov no yog qhov hloov. Kev hloov pauv yog qhov kev xaiv siv tshaj plaws; lawv tau siv hauv IP xov tooj, kev soj ntsuam video, thaum dai cov ntsiab lus nkag, thiab thaum txhim kho txhua yam kev ruaj ntseg system sensors, ACS controllers, thiab lwm yam.
Nws yog ib qho tseem ceeb uas yuav tau xav txog ntau yam:
- Tau tshaj los ntawm sab saum toj mus rau hauv qab. Ntawd yog, cov cuab yeej siv niaj hnub no uas txhawb nqa qhov tseeb IEEE 802.3bt tus qauv tuaj yeem siv los txuas thiab siv hluav taws xob qub. Tab sis ntawm qhov tsis sib xws - tsis yog.
- Kev ncua deb ntawm PD (Powered Devices). Ntxiv rau qhov ntev uas yog "ntawm no thiab tam sim no," nws tsim nyog xav txog yav tom ntej. Piv txwv li, yog tias thaj chaw warehouse nthuav dav, los yog npaj mus ua haujlwm. Nws yog qhov zoo dua los tso qee qhov tshwj xeeb ntawm cov yam ntxwv "rau yav tom ntej."
- Kev tswj cov cuab yeej. Ntxiv rau qhov "mus rau hauv" qhov hloov pauv thiab manually tig lub hwj chim tawm thiab qhib, muaj lwm yam kev tswj hwm, piv txwv li, rau cov koob yees duab video.
- Kev tiv thaiv tawm tsam surge voltages (SPD) thiab lwm yam teeb meem.
Zyxel muaj cov keyboards uas ua tau raws li tag nrho cov kev cai saum toj no. Cov no yog cov qauv ntawm GS1350 series tshiab. Peb twb Qhov no series yog Ameslikas positioned li Txawm li cas los xij, lawv tuaj yeem siv rau hauv lwm daim ntawv thov yam tsis muaj teeb meem, xws li lub xov tooj fais fab, cov ntsiab lus nkag, thiab lwm yam khoom siv PoE.
Daim duab 4. GS1350-26HP Dedicated Managed PoE Hloov.
Unmanaged Switches Series kuj yog ib qho kev xaiv zoo. Kev xaiv ntawm cov keyboards tshwj xeeb los ntawm Zyxel tuaj yeem pom hauv daim duab 5.
Daim duab 5. Zyxel portfolio ntawm kev tswj thiab tsis tswj PoE keyboards.
Xaiv tus neeg siv khoom siv
Feem ntau, thaum xaiv cov khoom siv kawg, lawv raug coj los ntawm lawv cov neeg siv khoom tus yam ntxwv, piv txwv li, duab zoo thaum xaiv lub koob yees duab video, txhawb nqa cov qauv Wi-Fi thaum xaiv cov ntsiab lus nkag, thiab lwm yam.
Txawm li cas los xij, cov khoom siv hluav taws xob kuj tawm ntawm nws lub cim. Nws ua rau kev txiav txim siab txog cov hauv qab no:
- Tus nqi-zoo ntawm cov cuab yeej.
- Kev tswj hwm muaj peev xwm.
- Nqe thiab zoo.
Tseem ceeb! Txawm hais tias tau tshaj tawm saum toj-down compatibility, koj yuav tsum tsis txhob cia siab 100% ntawm lub sijhawm no. Nyob rau hauv ib txoj haujlwm zoo, cov khoom siv hluav taws xob thiab cov neeg siv khoom yuav tsum txhawb nqa ib tus qauv, nyiam tshaj plaws tam sim no, ua kom tiav, thiab yuav khoom nrog kev cia siab ntawm kev siv cov thev naus laus zis tshiab, piv txwv li, Wi-Fi 6. Rov ua dua ib qho tag nrho cov txheej txheem, txaus siab hu ua "modernization," feem ntau kim dua li qee cov nqi ntxiv ntawm qhov kev siv.
Pab kev sib txuas lus
Wi-Fi 6 hotspots: ,
ΠΈ
Special Managed Switches Series thiab tswj tsis tau ntawm Zyxel lub vev xaib
Tau qhov twg los: www.hab.com