Amanye amakhasimende abuze, kukhona amaswishi e-POE emakethe abathi bayakwazi ukudlulisa amamitha ayi-150 noma amamitha angama-250, kuyiqiniso noma amanga?

Okokuqala, sidinga ukuqonda ukuthi iyini i-POE. I-POE isifinyezo se-Power over Ethernet, okusho ukuthi ngaphandle kwanoma yiziphi izinguquko kwingqalasizinda yekhebula ye-Ethernet Cat.5 ekhona, ingasetshenziselwa amatheminali athile asekelwe ku-IP (njengamafoni ase-IP). Ubuchwepheshe obunganikeza amandla e-DC kumadivayisi anjalo ngenkathi idlulisela amasiginali wedatha, njengezindawo zokufinyelela ze-LAN ezingenantambo, ama-AP, namakhamera enethiwekhi, wukushintsha okusekela Amandla phezu kwe-Ethernet.

Izinga le-Ethernet libeka ukuthi ibanga elikhulu lokudlulisela lingamamitha ayi-100, futhi ukulibaziseka kwedatha nokulahlekelwa kwephakethe kungase kwenzeke uma ibanga lidlula amamitha angu-100.
Kodwa akuzona zonke izintambo zenethiwekhi ezilinganiselwe kumamitha angu-100. Ekusebenzeni kwangempela, ikhebula lenethiwekhi lingaphinda lidlulise ngokuphumelelayo ngaphezu kwamamitha angu-100, futhi ikhwalithi ingafinyelela cishe amamitha angu-120, okungukuthi, ikhebula lenethiwekhi le-Cat.5 lenethiwekhi elingenawo umoya-mpilo, noma ikhebula lenethiwekhi lesigaba 6.

Abakhiqizi abaningi be-PoE manje sebethula amaswishi e-POE angamamitha ayi-150, amabanga amade, angamamitha angama-250, kanye namaswishi e-POE ebanga lamamitha angama-500. Ingabe akusho ukuthi ibanga lokudlulisela lamaswishi e-POE ajwayelekile angamamitha ayi-100, futhi kungcono kakhulu ukulawula ibanga phakathi kwamamitha angama-80 ekusebenziseni kwangempela. Kwenzenjani?

Sonke siyazi ukuthi ibanga lokunikezwa kwamandla kwe-PoE linqunywa ibanga lokudlulisela lesiginali yedatha. Ugesi omsulwa ungadluliswa kude kakhulu, kodwa ibanga lokudlulisela lesiginali yedatha linqunywa intambo yenethiwekhi. Ibanga lokudlulisa lesigaba esijwayelekile sesiginali yedatha yekhebula 5 licishe libe ngamamitha ayi-100. Ukuze kuqinisekiswe ikhwalithi yokwakhiwa, ngokuvamile kuba ngamamitha angu-80-90. Sicela uqaphele ukuthi ibanga lokudlulisela lapha libhekisela kusilinganiso esiphezulu, esifana ne-100M.
Abakhiqizi abaningi baye baphawula ukuthi ibanga lokudlulisela lokushintshwa kwe-POE yabo lingafinyelela kumamitha angu-150, kodwa ekusebenzeni kwangempela, uma ukushintsha okujwayelekile kwe-POE kufuna ukufeza ibanga lokudlulisela lamamitha angu-150, banezidingo eziqinile kwikhwalithi yekhebula lenethiwekhi. Kumele basebenzise izintambo ezingaphezu kwesigaba 6, okwandisa Noma kunjalo, uma isifunda sangaphakathi sokushintsha kwe-POE sithatha i-chip yokushintsha inethiwekhi evamile kakhulu kanye ne-chip yokuphatha ukunikezwa kwamandla ka-POE, akunakwenzeka ukufinyelela inethiwekhi ye-100M kanye nebanga lokudlulisela. wamamitha angu-150, ngisho noma kusetshenziswa intambo yenethiwekhi yekhwalithi ephezulu. Izokwandisa ukusetshenziswa kwamandla, idlule ukusetshenziswa kwamandla kagesi we-PoE, futhi ingazinzi kakhulu, ibe namaconsi ephaketheni angathi sína, umkhawulokudonsa oshubile wokudlulisela kanye nokunciphisa isignali, okuholela ekungazinzi kwesignali, ukuguga kwemishini yokushintsha ye-PoE, nobunzima ekulungiseni okulandelayo. .

Ngisho neswishi ye-POE esebenza kahle kakhulu enomthwalo ogcwele ongu-100M nokudluliselwa okuzinzile kungafinyelela kumamitha ayi-150 kuphela. Lithini ibanga lokudlulisela elingamamitha angama-250? Eqinisweni, zikhona izindlela. Uma izinga lincishiswa libe ngu-10M, okungukuthi, umkhawulokudonsa wokudlulisa ungu-10M, ibanga lokudlulisela lilungile. Ukunweba kumamitha angu-250 (kuye ngokuthi ikhwalithi yekhebula lenethiwekhi), lobu buchwepheshe abuhlinzeki nge-bandwidth ephezulu. Umkhawulokudonsa ucindezelwe ukusuka ku-100M ukuya ku-10M, okungelula ukudluliswa okubushelelezi kwezithombe zokuqapha ezinencazelo ephezulu.
Abakhiqizi abaningi, ngenkathi bekhuthaza imikhiqizo yabo ukusekela ukudluliswa kwamamitha angu-250, abasho ukwehla ku-bandwidth engu-10M, futhi kusolwa ukuthi bafihle ngamabomu umkhawulokudonsa kumakhasimende.

Ngaphezu kwalokho, akuwona wonke amaswishi e-POE angadlulisela kalula amamitha angama-250 inqobo nje uma umkhawulokudonsa wehliswa ube ngu-10M. Lokhu kubuye kuncike kwikhwalithi yeswishi. Uma ukuguquguquka kwe-chip yokushintsha kwangaphakathi kwe-switch kukubi kakhulu futhi ikhono lokuphatha i-chip yamandla lingaqinile, ngisho noma i-10M iphoqelelwe Ukudluliselwa, futhi ayikwazi ukuqinisekisa ukudluliswa okuzinzile kwamamitha angu-250, ngisho namamitha angu-150 awakwazi ukufinyelela.

Ngakho-ke, ngombono, ukufeza ukudluliswa kwamamitha angu-250, kuyadingeka ukwamukela umklamo wamandla aphezulu we-POE, futhi i-chip yamandla ye-POE ithatha ama-chips asezingeni eliphezulu ezinga lezimboni. Imojula yokuphatha amandla ingakwazi ukubona ngobuhlakani nangokuzenzakalelayo i-IEEE802.3af/at standard, ilungise ngokuzenzakalelayo amandla, futhi isebenzise ama-cores angu-8 ngesikhathi esifanayo. Ubuchwepheshe bokuphakelwa kwamandla obuhlakaniphile, ukufeza umsebenzi onjalo, kusetshenziswa ukunikezwa kwamandla okwakhelwe ngaphakathi, inzuzo yokusebenzisa ugesi owakhelwe ngaphakathi ukuthi bungathuthukisa ukwakheka okuthile, ukulinganisa ngokuzenzakalelayo isidingo samandla okuphela kokwamukela kanye ne-cable transmission impedance kanye amanye amapharamitha, ahlaziywayo futhi abalwe imojula yokuphatha amandla ehlakaniphile futhi akhishwe Yala umjikelezo wokuphakelwa kwamandla wangaphakathi ukuze ulungise okokufaka kwe-voltage eqondile ukuze ihambisane nokuphuma kwamandla okuzenzakalelayo nezinto ezisebenza ekugcineni.