Utshintsho lwe-PoE lubonelela njani amandla e-PoE? PoE isishwankathelo somgaqo wonikezelo lwamandla
Umgaqo wonikezelo lwamandla we-PoE eneneni ulula kakhulu. Oku kulandelayo kuthatha utshintsho lwe-PoE njengomzekelo wokuchaza ngokweenkcukacha umgaqo wokusebenza we-PoE switch, indlela yonikezelo lwamandla e-PoE kunye nomgama wokuhambisa.
Iinguqu zePoE zisebenza njani
Emva kokudibanisa isixhobo sokufumana amandla kwiswitshi ye-PoE, i-PoE switch iya kusebenza ngolu hlobo lulandelayo:
Inyathelo 1: Khangela isixhobo esinikwe amandla (PD). Eyona njongo iphambili kukubona ukuba isixhobo esiqhagamshelweyo sisixhobo esinamandla okwenene (PD) (enyanisweni, kukubona isixhobo esinamandla esinokuxhasa amandla phezu komgangatho we-Ethernet). Ukutshintsha kwe-PoE kuya kukhupha i-voltage encinci kwi-port ukubona isixhobo sokuphela kokufumana amandla, okubizwa ngokuba yi-voltage pulse discovery. Ukuba ukuchasana okusebenzayo kwexabiso elichaziweyo kufunyenwe, isixhobo esiqhagamshelwe kwizibuko sisixhobo sokuphela sokufumana amandla okwenene. Kufuneka kuqatshelwe ukuba ukutshintshwa kwe-PoE kukutshintsha kwe-PoE esemgangathweni, kwaye ukutshintshwa kwe-PoE engekho-standard yesisombululo se-single-chip akuyi kwenza oku kubhaqa ngaphandle kwe-chip yokulawula.
Inyathelo 2: Ukuhlelwa kweZixhobo eziSebenzisiweyo (PD). Xa i-Powered Device (PD) ifunyenwe, i-PoE switch iyayihlula, iyahlula, kwaye ivavanya ukusetyenziswa kwamandla okufunwa yi-PD.
| ibakala | PSE amandla emveliso (W) | PD igalelo lamandla (W) |
| 0 | 15.4 | 0.44–12.94 |
| 1 | 4 | 0.44–3.84 |
| 2 | 7 | 3.84–6.49 |
| 3 | 15.4 | 6.49–12.95 |
| 4 | 30 | 12.95–25.50 |
| 5 | 45 | 40 (4-izibini) |
| 6 | 60 | 51 (4-izibini) |
| 8 | 99 | 71.3 (izibini ezi-4) |
| 7 | 75 | 62 (4-izibini) |
Inyathelo lesi-3: Qalisa unikezelo lwamandla. Emva kokuba umgangatho uqinisekisiwe, ukutshintshela kwe-PoE kuya kunika amandla kwisixhobo sokugqibela sokufumana ukusuka kwi-voltage ephantsi kude kube yi-48V DC amandla anikezelweyo ngaphakathi kwexesha elingaphantsi kwe-15μs.
Inyathelo lesi-4: Vula ngesiqhelo. Inika ubukhulu becala amandla azinzileyo kwaye athembekileyo e-48V DC kwisixhobo sokugqibela esifumanayo ukuhlangabezana nokusetyenziswa kwamandla kwesixhobo sokugqibela sokufumana.
Inyathelo lesi-5: Nciphisa unikezelo lombane. Xa isixhobo sokufumana amandla sinqanyuliwe, ukusetyenziswa kwamandla kugcwele kakhulu, isiphaluka esifutshane senzeke, kwaye ukusetyenziswa kwamandla onke kudlula uhlahlo lwabiwo-mali lwe-PoE switch, i-PoE switch iya kumisa ukunika amandla kwisixhobo sokufumana amandla ngaphakathi kwe-300-400ms, kwaye izakuqala unikezelo lwamandla kwakhona. uvavanyo. Inokukhusela ngokufanelekileyo isixhobo sokufumana amandla kunye ne-PoE switch ukukhusela umonakalo kwisixhobo.
Imowudi yonikezelo lwamandla e-PoE
Inokubonwa apha ngasentla ukuba umbane we-PoE uphunyezwa ngentambo yenethiwekhi, kwaye intambo yenethiwekhi iqulunqwe ngamabini amane aphihliwe (ii-8 core wires). Ngoko ke, iingcingo ezisibhozo ezingundoqo kwintambo yenethiwekhi zitshintshi ze-PoE ezibonelela ngedatha kunye ne-Medium yokuhanjiswa kwamandla. Okwangoku, ukutshintshwa kwe-PoE kuya kubonelela ngesixhobo sokugqibela sokufumana amandla ahambelanayo e-DC ngokusebenzisa iindlela ezintathu zokubonelela umbane we-PoE: I-Mode A (End-Span), i-Mode B (Mid-Span) kunye ne-4-pair.
PoE umgama wonikezelo lwamandla
Ngenxa yokuba ukuhanjiswa kwamandla kunye nemiqondiso yenethiwekhi kwintambo yothungelwano kuchaphazeleka ngokulula kukuxhathisa kunye ne-capacitance, okukhokelela ekunciphiseni umqondiso okanye unikezelo lombane olungazinzanga, umgama wothumelo lwentambo yomnatha ulinganiselwe, kwaye umgama wogqithiso ophezulu unokufikelela kwiimitha ezili-100 kuphela. Unikezelo lwamandla e-PoE lufezekiswa ngentambo yenethiwekhi, ngoko umgama wayo wokuhambisa uchaphazeleka yintambo yenethiwekhi, kwaye umgama omkhulu wokuhambisa ukwimitha ezili-100. Nangona kunjalo, ukuba i-PoE extender isetyenzisiwe, uluhlu lonikezelo lwamandla lwe-PoE lunokwandiswa ukuya kubuninzi beemitha ezili-1219.
Ukulungisa njani ukusilela kwamandla ePoE?
Xa unikezelo lwamandla lwe-PoE lusilela, unokucombulula ingxaki kwezi nkalo zine zilandelayo.
Jonga ukuba isixhobo esifumana amandla siyakuxhasa unikezelo lwamandla lwe-PoE. Ngenxa yokuba ingezizo zonke izixhobo zenethiwekhi ezinokuxhasa iteknoloji yobonelelo lwamandla e-PoE, kukwayimfuneko ukujonga ukuba isixhobo siyayixhasa na iteknoloji yobonelelo lwamandla e-PoE phambi kokuba isixhobo siqhagamshele kwisitshixo se-PoE. Nangona i-PoE iya kubhaqa xa isebenza, inokubhaqa kuphela kwaye inike amandla kwisixhobo sokugqibela sokufumana esixhasa iteknoloji yobonelelo lwamandla e-PoE. Ukuba iswitshi ye-PoE ayiboneleli ngombane, kusenokuba kungenxa yokuba isixhobo sokuphela kokufumana asikwazi ukuxhasa iteknoloji yonikezelo lwamandla e-PoE.
Jonga ukuba amandla esixhobo esifumana amandla ayagqitha kumandla aphezulu wezibuko lokutshintsha. Ngokomzekelo, utshintsho lwe-PoE oluxhasa kuphela umgangatho we-IEEE 802.3af (amandla aphezulu kwi-port nganye kwi-switch yi-15.4W) ixhunywe kwisixhobo sokufumana amandla esinamandla e-16W okanye ngaphezulu. Ngeli xesha, isiphelo sokufumana umbane Isixhobo singonakala ngenxa yokungaphumeleli kombane okanye umbane ongazinzanga, okukhokelela kukusilela kombane wePoE.
Jonga ukuba amandla ewonke azo zonke izixhobo ezixhunyiwe zigqithise uhlahlo lwabiwo-mali lwamandla okutshintsha. Xa amandla apheleleyo ezixhobo ezixhunyiwe zidlula uhlahlo lwabiwo-mali lokutshintsha, ukunikezelwa kwamandla e-PoE akuphumelelanga. Ngokomzekelo, ukutshintshwa kwe-PoE ye-24-port kunye nohlahlo lwabiwo-mali lwe-370W, ukuba umtshintshi uhambelana nomgangatho we-IEEE 802.3af, unokudibanisa izixhobo zokufumana amandla angama-24 ezilandela umgangatho ofanayo (kuba amandla alolu hlobo lwesixhobo 15.4 W, ukudibanisa i-24 Amandla onke esixhobo afikelela kwi-369.6W, engayi kudlula uhlahlo lwabiwo-mali lwamandla okutshintsha); ukuba utshintsho luhambelana nomgangatho we-IEEE802.3, kuphela izixhobo ezili-12 zokufumana amandla ezilandela umgangatho ofanayo zinokudibaniswa (kuba amandla alolu hlobo lwesixhobo ngu-30W, ukuba umtshintshi uqhagamshelwe kwi-24 uya kudlula uhlahlo lwabiwo-mali lombane, ngoko ke. kuphela ubuninzi be-12 obunokudityaniswa).
Khangela ukuba imowudi yonikezelo lwamandla yesixhobo sonikezelo lwamandla (PSE) iyahambelana na naleyo yesixhobo sokufumana umbane (PD). Ngokomzekelo, i-PoE switch isebenzisa imodi A yokunikezelwa kwamandla, kodwa isixhobo sokufumana amandla axhunyiwe sinokufumana kuphela ukuhanjiswa kwamandla kwimodi ye-B, ngoko ayiyi kukwazi ukunika amandla.
Shwankathela
Itekhnoloji yobonelelo lwamandla e-PoE ibe yinxalenye ebalulekileyo yenguqu yedijithali. Ukuqonda umgaqo wonikezelo lwamandla e-PoE kuya kukunceda ukukhusela iiswitshi ze-PoE kunye nezixhobo zokufumana amandla. Kwangaxeshanye, ukuqonda iingxaki zoqhagamshelo lokutshintsha kwe-PoE kunye nezisombululo zinokunqanda ngokufanelekileyo ukuthunyelwa kweenethiwekhi ze-PoE. ukuchitha ixesha kunye neendleko ezingeyomfuneko.
Ixesha lokuposa: Nov-09-2022