Ibyerekeranye no gutanga amashanyarazi yaPOE
Intera yo gutanga amashanyarazi ya PoE igenwa nikimenyetso cyamakuru hamwe nintera yoherejwe, kandi intera yohereza amakuru yikimenyetso igenwa numuyoboro.

1. Ibisabwa insinga zumuyoboro Kugabanya inzitizi yumurongo wumurongo, intera ndende yohereza, bityo rero mbere ya byose, ubwiza bwumugozi wurusobe bugomba kwemezwa, kandi ubwiza bwumugozi bugomba kugurwa.Birasabwa gukoresha umugozi wa super-category 5.Intera yohereza ibyiciro bisanzwe ibyapa 5 byerekana amakuru ni metero 100.
Kubera ko hari ibipimo bibiri bya PoE: IEEE802.af na IEEE802.3at ibipimo, bafite ibisabwa bitandukanye kumurongo wa net ya Cat5e, kandi itandukaniro rigaragarira cyane cyane mubyangano bihwanye.Kurugero, kuri metero 100 Icyiciro cya 5e umuyoboro, imiyoboro ihwanye na IEEE802.3at igomba kuba munsi ya 12.5 oms, naho iya IEEE802.3af igomba kuba munsi ya 20 oms.Birashobora kugaragara ko umuto uhwanye nimbogamizi ari, intera ihererekanya ni.

2. Ibipimo bya PoE
Kugirango hamenyekane intera yoherejwe ya PoE ihinduka, biterwa na voltage isohoka mumashanyarazi ya PoE.Igomba kuba ndende ishoboka mubisanzwe (44-57VDC).Ibisohoka voltage yicyambu cya PoE igomba kubahiriza IEEE802.3af / kurwego rusanzwe.

Ibyago byihishe bya POE idasanzwe
Amashanyarazi adasanzwe ya PoE agereranijwe no gutanga amashanyarazi asanzwe.Ntabwo ifite chip igenzura imbere, kandi nta ntambwe yo gutahura.Bizatanga ingufu kuri IP ititaye niba ishyigikiye PoE.Niba IP terminal idafite amashanyarazi ya PoE, birashoboka cyane Gutwika icyambu.

1. Hitamo bike "bitari bisanzwe" PoE
Mugihe uhisemo PoE switch, gerageza uhitemo imwe isanzwe, ifite ibyiza bikurikira:
Amashanyarazi arangirira (PSE) hamwe nimbaraga zakira (PD) zirashobora kumva neza no guhindura voltage yo gutanga.
Kurinda neza impera yakira (mubisanzwe IPC) gutwikwa numuriro wamashanyarazi (mubindi bice birimo umuzunguruko mugufi, kurinda surge, nibindi).
Irashobora kumenya neza niba itumanaho rishyigikira PoE, kandi ntirishobora gutanga ingufu mugihe uhuza na terefone itari PoE.

Non-ibisanzwe bya PoEmubisanzwe ntabwo ufite ingamba zumutekano zavuzwe haruguru kugirango uzigame ibiciro, bityo haribibazo bimwe byumutekano.Ariko, ntibisobanura ko PoE itari isanzwe idashobora gukoreshwa.Iyo voltage ya PoE idasanzwe isanzwe ihuye na voltage yigikoresho gikoreshwa, irashobora kandi gukoreshwa kandi irashobora kugabanya ibiciro.

2. Ntukoreshe "Impimbano" PoE.Ibikoresho bya FE byahimbye gusa imbaraga za DC mumurongo wumuyoboro ukoresheje PoE ikomatanya.Ntibishobora gukoreshwa na switch isanzwe ya PoE, bitabaye ibyo igikoresho kizashya, ntukoreshe ibikoresho bya PoE byimpimbano.Mubikorwa bya injeniyeri, ntabwo ari ngombwa guhitamo gusa ibintu bisanzwe bya PoE, ariko kandi nibisanzwe bya PoE.

Kubyerekeye ikibazo cya caskadi ya switch
Umubare wibice bya cascaded byahinduwe birimo kubara umurongo, urugero rworoshye:
Niba umuyoboro ufite icyambu cya 100Mbps washyizwe hagati, umurongo mugari ni 45Mbps (gukoresha umurongo ≈ 45%).Niba buri cyuma gihujwe nigikoresho cyo kugenzura gifite igipimo cya biti ya 15M, kibarirwa kuri 15M yumurongo mugari wa enterineti imwe, noneho 45 / 15≈3, 3 byahinduwe birashobora gufatwa.
Ni ukubera iki gukoresha umurongo mugari bingana na 45%?Umutwe wa Ethernet IP packet yumutwe uhwanye na 25% yumuhanda wose, umurongo uhuza umurongo uhari ni 75%, kandi umurongo wabigenewe ufatwa nka 30% mubikorwa bifatika, bityo igipimo cyo gukoresha umurongo cyagereranijwe ni 45% .

Ibyerekeye guhinduranya icyambu
1. Kugera no kuzamura ibyambu
Guhindura ibyambu bigabanijwemo uburyo bwo kugera no kuzamura ibyambu kugirango turusheho gutandukanya serivisi no koroshya kubungabunga, bityo hagaragazwe inshingano zitandukanye.
Icyambu cyo kwinjira: Nkuko izina ribivuga, ni interineti ihujwe neza na terefone (IPC, simsiz AP, PC, nibindi)
Icyambu cya Uplink: Icyambu gihujwe no guteranya cyangwa urusobe rwibanze, mubisanzwe hamwe nigipimo kinini cyo hejuru, ntabwo gishyigikira imikorere ya PoE.