Iswishi ye-PoE iwanikeza kanjani amandla e-PoE? Uhlolojikelele lwesimiso sokuphakelwa kwamandla kwe-PoE
Umgomo wokunikezwa kwamandla we-PoE empeleni ulula kakhulu. Okulandelayo kuthatha ukushintsha kwe-PoE njengesibonelo ukuchaza ngokuningiliziwe umgomo wokusebenza weswishi ye-PoE, indlela yokuphakelwa kukagesi ye-PoE kanye nebanga lawo lokudlulisela.
Ukushintshwa Kwe-PoE Kusebenza Kanjani
Ngemva kokuxhuma idivayisi eyamukela amandla kuswishi ye-PoE, ukushintsha kwe-PoE kuzosebenza ngale ndlela elandelayo:
Isinyathelo 1: Thola idivayisi enamandla (PD). Injongo eyinhloko iwukuthola ukuthi idivayisi exhunyiwe iyidivayisi enamandla ngempela (i-PD) (eqinisweni, iwukubona idivayisi enikwe amandla engasekela amandla angaphezu kwesilinganiso se-Ethernet). Iswishi ye-PoE izokhipha i-voltage encane esikhumulweni ukuze kutholwe idivayisi yokugcina eyamukela amandla, lokho okubizwa ngokuthi ukutholwa kwe-voltage pulse. Uma kutholwa ukumelana okusebenzayo kwenani elishiwo, idivayisi exhunywe embobeni iyidivayisi yokugcina eyamukela amandla wangempela. Kufanele kuqashelwe ukuthi ukushintshwa kwe-PoE wukushintsha kwe-PoE okujwayelekile, futhi ukushintshwa kwe-PoE okungajwayelekile kwesisombululo se-single-chip ngeke kwenze lokhu kutholwa ngaphandle kwe-chip yokulawula.
Isinyathelo sesi-2: Ukuhlelwa Kwamadivayisi Anamandla (PD). Uma Kutholwa Idivayisi Enamandla (PD), ukushintsha kwe-PoE kuyayihlukanisa, iyihlukanise, futhi ihlole ukusetshenziswa kwamandla okudingwa yi-PD.
| ibanga | Amandla okukhiphayo e-PSE (W) | Amandla wokufaka we-PD (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-amapheya) |
| 6 | 60 | 51 (4-amapheya) |
| 8 | 99 | 71.3 (4-amapheya) |
| 7 | 75 | 62 (4-amapheya) |
Isinyathelo sesi-3: Qala ukunikezwa kwamandla. Ngemva kokuqinisekiswa kweleveli, iswishi ye-PoE izonikeza amandla kudivayisi yokugcina eyamukelayo ukusuka ku-voltage ephansi kuze kube yilapho kunikezwa amandla angu-48V DC phakathi nesikhathi sokumisa esingaphansi kuka-15μs.
Isinyathelo sesi-4: Vula ngokujwayelekile. Ihlinzeka ikakhulukazi amandla aqinile futhi athembekile e-48V DC omshini wokugcina owamukelayo ukuhlangabezana nokusetshenziswa kwamandla kwempahla yokugcina etholayo.
Isinyathelo sesi-5: Nqamula ukunikezwa kwamandla. Lapho idivayisi yokwamukela amandla inqanyuliwe, ukusetshenziswa kwamandla kugcwele ngokweqile, isifunda esifushane siyenzeka, futhi ukusetshenziswa kwamandla okuphelele kudlula isabelomali samandla we-switch ye-PoE, ukushintshwa kwe-PoE kuzoyeka ukunikeza amandla kudivayisi ethola amandla ngaphakathi kuka-300-400ms, futhi izoqala kabusha ukunikezwa kwamandla. test. Ingavikela ngempumelelo idivayisi eyamukela amandla kanye neswishi ye-PoE ukuze kuvinjelwe umonakalo kudivayisi.
Imodi yokunikezwa kwamandla e-PoE
Kungabonakala kulokhu okungenhla ukuthi ukunikezwa kwamandla kwe-PoE kwenziwa ngentambo yenethiwekhi, futhi ikhebula lenethiwekhi lakhiwe ngamapheya amane amapheya asontekile (izintambo ezingu-8 eziyinhloko). Ngakho-ke, izintambo eziyisishiyagalombili eziyinhloko kukhebula lenethiwekhi yizishintshi ze-PoE ezihlinzeka ngedatha kanye ne-Medium yokudluliswa kwamandla. Njengamanje, ukushintshwa kwe-PoE kuzonikeza idivayisi yokugcina eyamukelayo amandla e-DC ahambisanayo ngokusebenzisa izindlela zokuphakela amandla ze-PoE ezintathu: Imodi A (I-End-Span), Imodi B (Mid-Span) kanye namapheya angu-4.
Ibanga lokunikezwa kwamandla kwe-PoE
Ngenxa yokuthi ukudluliswa kwamandla kanye nezimpawu zenethiwekhi kukhebula lenethiwekhi kuthinteka kalula ngenxa yokumelana namandla, okuholela ekunciphiseni isignali noma ukunikezwa kwamandla okungazinzile, ibanga lokudlulisela ikhebula lenethiwekhi lilinganiselwe, futhi ibanga lokudlulisela eliphakeme lingafinyelela kumamitha angu-100 kuphela. Ukunikezwa kwamandla kwe-PoE kwenziwa ngekhebula lenethiwekhi, ngakho-ke ibanga layo lokudlulisela lithintwa ikhebula lenethiwekhi, futhi ibanga eliphakeme lokudlulisela lingamamitha ayi-100. Kodwa-ke, uma kusetshenziswa i-PoE extender, uhla lokuphakela amandla kwe-PoE lunganwetshwa lufike kubukhulu obungamamitha ayi-1219.
Ungakuxazulula kanjani ukuhluleka kwamandla we-PoE?
Uma ukunikezwa kwamandla kwe-PoE kwehluleka, ungakwazi ukuxazulula inkinga kusuka kuzici ezine ezilandelayo.
Hlola ukuthi idivayisi eyamukela amandla iyakusekela yini ukunikezwa kwamandla kwe-PoE. Ngenxa yokuthi akuwona wonke amadivaysi enethiwekhi angakwazi ukusekela ubuchwepheshe bokuhlinzeka ngogesi we-PoE, kuyadingeka futhi ukuhlola ukuthi idivayisi iyabusekela yini ubuchwepheshe bokuhlinzekwa kwamandla we-PoE ngaphambi kokuxhuma idivayisi kusiwishi se-PoE. Nakuba i-PoE izobona lapho isebenza, ingathola kuphela futhi inikeze amandla kudivayisi yokugcina eyamukelayo esekela ubuchwepheshe bokuphakelwa kwamandla we-PoE. Uma iswishi ye-PoE inganikezi amandla, kungenzeka kungenxa yokuthi idivayisi yokugcina eyamukelayo ayikwazi ukusekela ubuchwepheshe bokuphakela amandla we-PoE.
Hlola ukuthi amandla edivayisi eyamukela amandla ayawedlula yini amandla amakhulu wembobo yokushintsha. Isibonelo, inkinobho ye-PoE esekela kuphela izinga le-IEEE 802.3af (amandla aphezulu wembobo ngayinye ekushintsheni ngu-15.4W) ixhunywe kudivayisi eyamukela amandla enamandla angu-16W noma ngaphezulu. Ngalesi sikhathi, isiphetho sokwamukela amandla Lolu cingo lungase lonakaliswe ngenxa yokwehluleka kwamandla noma amandla angazinzile, okuholela ekuhlulekeni kwamandla e-PoE.
Hlola ukuthi amandla aphelele awo wonke amadivayisi axhunyiwe ayasidlula isabelomali samandla weswishi. Uma amandla aphelele wamadivayisi axhunyiwe edlula isabelomali samandla okushintsha, ukunikezwa kwamandla kwe-PoE kuyehluleka. Isibonelo, ukushintsha kwe-PoE yamachweba angama-24 nesabelomali samandla esingu-370W, uma iswishi ithobelana nezinga le-IEEE 802.3af, ingaxhuma amadivayisi athola amandla angu-24 alandela izinga elifanayo (ngoba amandla alolu hlobo lwedivayisi angu-15.4 W, ukuxhuma i-24 Amandla aphelele wedivayisi afinyelela ku-369.6W, angeke adlule isabelomali samandla sokushintsha); uma ukushintsha kuhambisana nezinga le-IEEE802.3at, amadivayisi athola amandla angu-12 kuphela alandela izinga elifanayo angaxhunywa (ngoba amandla alolu hlobo lwedivayisi angu-30W, uma iswishi ixhumeke ku-24 izodlula isabelomali samandla weswishi, kungaxhunywa kuphela ubuningi obuyi-12).
Hlola ukuthi ingabe imodi yokuphakela amandla yempahla yokuphakela amandla (i-PSE) iyahambisana yini naleyo yezisetshenziswa zokwamukela amandla (i-PD). Isibonelo, ukushintshwa kwe-PoE kusebenzisa imodi A ukuze kunikezwe amandla, kodwa idivayisi yokwamukela amandla exhunyiwe ingathola kuphela ukudluliswa kwamandla kumodi B, ngakho-ke ngeke ikwazi ukunikeza amandla.
Fingqa
Ubuchwepheshe bokuhlinzeka ngogesi kwe-PoE sebuyingxenye ebalulekile yoguquko lwedijithali. Ukuqonda umgomo wokunikezwa kwamandla we-PoE kuzokusiza uvikele amaswishi e-PoE namadivayisi amukela amandla. Ngasikhathi sinye, ukuqonda izinkinga zokuxhuma kwe-PoE switch nezisombululo kungagwema ngempumelelo ukusebenzisa amanethiwekhi e-PoE. ukuchitha isikhathi nezindleko ezingadingekile.
Isikhathi sokuthumela: Nov-09-2022