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 ungadluliselwa kude kakhulu, kodwa ibanga lokudlulisela lesiginali yedatha linqunywa intambo yenethiwekhi.Ibanga lokudlulisela lesignali yedatha yekhebula elijwayelekile lesigaba 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 oqinile wokudlulisela kanye nokuncipha kwesignali, okuholela ekungaqini 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, akuzona zonke izinguquko ze-POE ezingadlulisela kalula amamitha angu-250 inqobo nje uma umkhawulokudonsa uncishisiwe 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 ingabona ngobuhlakani nangokuzenzakalelayo i-IEEE802.3af/at standard, ilungise ngokuzenzakalelayo amandla, futhi isebenzise ama-cores angu-8 ngesikhathi esifanayo.Ubuchwepheshe bokuphakela amandla obuhlakaniphile, ukufeza umsebenzi onjalo, kusetshenziswa ukunikezwa kwamandla okwakhelwe ngaphakathi, inzuzo yokusebenzisa ugesi owakhelwe ngaphakathi ukuthi bungakhulisa 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 kumishini enamandla yokugcina.