Mayelana nebanga lokuphakelwa kwamandla kaUkushintsha kwe-POE
Ibanga lokunikezwa kwamandla kwe-PoE linqunywa isignali yedatha nebanga lokudlulisela, futhi ibanga lokudlulisela lesignali yedatha linqunywa intambo yenethiwekhi.

1. Izidingo zekhebula lenethiwekhi Ukuncipha kokuvinjwa kwekhebula lenethiwekhi, ibanga elide lokudlulisela, ngakho okokuqala, ikhwalithi yentambo yenethiwekhi kufanele iqinisekiswe, futhi ikhwalithi yentambo yenethiwekhi kufanele ithengwe.Kunconywa ukusebenzisa ikhebula lenethiwekhi lesigaba 5 esikhulu.Ibanga lokudlulisela lezimpawu zedatha yekhebula elijwayelekile lesigaba 5 licishe libe ngamamitha ayi-100.
Njengoba kunamazinga e-PoE amabili: amazinga e-IEEE802.af kanye ne-IEEE802.3at, anezidingo ezihlukile zamakhebuli enethiwekhi ye-Cat5e, futhi umehluko ubonakala ngokuyinhloko ku-impedance efanayo.Isibonelo, kukhebula yenethiwekhi ye-100-metres yeSigaba 5e, ukuvinjelwa okulingana kwe-IEEE802.3at kumele kube ngaphansi kuka-12.5 ohms, futhi lokho kwe-IEEE802.3af kumele kube ngaphansi kuka-20 ohms.Kungabonakala ukuthi i-impedance encane incane, ibanga lokudlulisela likude.

2. Izinga le-PoE
Ukuqinisekisa ibanga lokudlulisela le-switch ye-PoE, kuya nge-voltage ephumayo ye-PoE power supply.Kufanele ibe phezulu ngangokunokwenzeka ngaphakathi kwendinganiso (44-57VDC).Amandla kagesi okukhiphayo wembobo yokushintsha ye-PoE kufanele ahambisane ne-IEEE802.3af/at standard.

Izingozi ezifihliwe zokushintshwa kwe-POE okungajwayelekile
Ukunikezwa kwamandla kwe-PoE okungajwayelekile kuhlobene nokunikezwa kwamandla okujwayelekile kwe-PoE.Ayinayo i-chip yokulawula ye-PoE ngaphakathi, futhi asikho isinyathelo sokutholwa.Izonikeza amandla kutheminali ye-IP kungakhathaliseki ukuthi isekela i-PoE.Uma itheminali ye-IP ingenawo amandla e-PoE, kungenzeka kakhulu ukuthi Shisa imbobo yenethiwekhi.

1. Khetha i-PoE “engeyona ejwayelekile” encane
Lapho ukhetha ukushintshwa kwe-PoE, zama ukukhetha okujwayelekile, okunezinzuzo ezilandelayo:
Ukuphela kokunikezwa kwamandla (i-PSE) kanye nesiphetho sokwamukela amandla (i-PD) kungezwa ngamandla futhi kulungise i-voltage yokunikezela.
Vikela ngempumelelo indawo eyamukelayo (imvamisa i-IPC) ekushisweni ukushaqeka kukagesi (ezinye izici zifaka ukujikeleza okufushane, ukuvikelwa kokuhlinzwa, njll.).
Ingakwazi ukubona ngobuhlakani ukuthi itheminali iyayisekela i-PoE, futhi ngeke inikeze amandla lapho ixhumeka kutheminali okungeyona eye-PoE.

Okungeyona-ukushintshwa kwe-PoE okujwayelekilengokuvamile abanazo izinyathelo zokuphepha ezingenhla ukuze wonge izindleko, ngakho-ke kunezingozi ezithile zokuphepha.Nokho, akusho ukuthi i-PoE engeyona ejwayelekile ayikwazi ukusetshenziswa.Uma i-voltage ye-PoE engajwayelekile ifana ne-voltage yedivayisi enikwe amandla, ingasetshenziswa futhi futhi inganciphisa izindleko.

2. Ungasebenzisi i-PoE “yomgunyathi”.Amadivayisi we-PoE mbumbulu ahlanganisa kuphela amandla e-DC kukhebula yenethiwekhi ngesihlanganisi se-PoE.Azikwazi ukunikwa amandla ukushintshwa kwe-PoE okujwayelekile, ngaphandle kwalokho idivayisi izosha, ngakho-ke ungasebenzisi amadivaysi e-PoE angamanga.Kuzinhlelo zokusebenza zobunjiniyela, akudingekile kuphela ukukhetha ukushintshwa okujwayelekile kwe-PoE, kodwa futhi namatheminali we-PoE ajwayelekile.

Mayelana nenkinga ye-cascading yeswishi
Inani lezendlalelo zokushintshwa kwe-cascade libandakanya ukubalwa komkhawulokudonsa, isibonelo esilula:
Uma iswishi enembobo yenethiwekhi engu-100Mbps idluliselwa phakathi nendawo, umkhawulokudonsa osebenzayo ungu-45Mbps (ukusetshenziswa komkhawulokudonsa ≈ 45%).Uma iswishi ngayinye ixhunywe kudivayisi yokuqapha enenani eliphelele lebhithi elingu-15M, elihlanganisa u-15M womkhawulokudonsa weswishi eyodwa, khona-ke ama-45/15≈3, amaswishi angu-3 angashintshwa.
Kungani ukusetshenziswa komkhawulokudonsa cishe kulingana nama-45%?Isihloko sangempela sepakethe ye-Ethernet IP silandisa mayelana ne-25% yenani eliphelele lethrafikhi, umkhawulokudonsa otholakalayo wangempela wokuxhumanisa ungama-75%, futhi umkhawulokudonsa ogodliwe ubhekwa njenge-30% ekusebenzeni okungokoqobo, ngakho-ke izinga lokusebenzisa umkhawulokudonsa lilinganiselwa ku-45% .

Mayelana nokuhlonza imbobo yokushintsha
1. Ukufinyelela futhi uplink izimbobo
Izimbobo zokushintsha zihlukaniswe zibe izimbobo zokufinyelela neziphezulu ukuze zihlukanise kangcono izinsizakalo nokwenza lula ukunakekelwa, ngaleyo ndlela kucaciswe izindima ezihlukene zamachweba.
Imbobo yokufinyelela: Njengoba igama lisho, iyisixhumi esibonakalayo esixhunywe ngqo kutheminali (IPC, i-wireless AP, i-PC, njll.)
Imbobo ye-Uplink: Imbobo exhunywe ekuhlanganiseni noma kunethiwekhi eyinhloko, ngokuvamile enezinga eliphezulu lokusebenzelana, ayiwusekeli umsebenzi we-PoE.