I-PoE Networking: Umhlahlandlela Ophelele Wokunika Amandla Nokuxhuma Nge-Ethernet

Informatec Digital » Amanethiwekhi » I-PoE Networking: Umhlahlandlela Ophelele Wokunika Amandla Nokuxhuma Nge-Ethernet

Uma uke wazibuza ukuthi kungenzeka kanjani ukuthi unike amandla amakhamera e-IP, izindawo zokufinyelela ze-Wi-Fi, noma amafoni e-VoIP ngaphandle kwendawo yamandla eseduze, impendulo ithi Amandla ngaphezulu kwe-Ethernet (PoE)Lobu buchwepheshe buvumela idatha namandla ukuhamba ngekhebuli yenethiwekhi efanayo, okwenza ukufakwa kube lula futhi kunciphise izindleko ngaphandle kokudela ukuphepha noma ukusebenzisana.

Ngale kwesihloko, i-PoE iyisethi ye Izilinganiso ze-IEEE Ichaza ama-voltage, ama-currents, izigaba zamandla, izikhonkwane ezisetshenzisiwe, kanye nenqubo yezingxoxo phakathi kwezinto ezinikezela ngogesi (PSE) kanye nedivayisi enikwe amandla (PD). Ukuqonda ukuthi kusebenza kanjani ngaphakathi kukusiza ukuthi usayizi ofanele wenethiwekhi yakho, ugweme izinkinga zokwehla kwamandla kagesi, futhi ukukhetha iswishi efanele noma umjovo.

Iyini i-PoE futhi isebenza kanjani?

I-PoE ihlanganisa ukunikezwa kwamandla ku-a ingqalasizinda ye-Ethernet ejwayelekileUmjovo wamandla (i-PSE, ngokuvamile i-PoE switch noma i-injector) ithola ukuthi idivayisi yendawo (PD) iyayisekela yini i-PoE; uma kungenjalo, ayiwasebenzisi amandla. Lokhu kutholwa okuzenzakalelayo kuwukhiye ekuxubeni i-PoE kanye namadivayisi angewona e-PoE ku-LAN efanayo. ukuphepha okuphelele.

Enguqulweni yayo emisiwe, i-PoE isebenzisa inqubo enezigaba ezine: ukutholwa, ukuhlukaniswa, ibhuthini y ukusebenzaNgesikhathi sokutholwa, i-PSE ibheka ukumelana kwesici phakathi kuka-15 no-33 kΩ ku-PD; ngesikhathi sokuhlukaniswa, i-PD imemezela isigaba sayo samandla; emva kwalokho, i-PSE isebenzisa i-voltage ukuze iqale ukunikezwa kwamandla futhi iya esimeni esizinzile. Konke lokhu kwenzeka ku-a sobala futhi ngaphandle kokuthikameze ithrafikhi yedatha.

Nge-Fast Ethernet, amandla angahamba ngamapheya edatha (1/2 kanye no-3/6) noma amapheya “amahhala” (4/5 kanye no-7/8). Ku-Gigabit nangaphezulu, wonke amapheya amane asetshenziswa futhi umjovo wenziwa kusetshenziswa amandla e-phantom, ukugcina ukusebenza kwe kuze kufike ku-10 Gbps ngezintambo ezifanele (Cat6 noma ngaphezulu).

Imininingwane esebenzayo: I-PoE ayidingi ukufakwa kwezindawo zikagesi ophahleni bamanga noma kuma-facade, futhi ivumela amandla okulondoloza amaphakathi ku-UPS. Uma inkinobho ye-PoE ivikelwe yi-a ukunikezwa kwamandla okungaphazamiseki, wonke ama-PD abalulekile (amakhamera, ukulawula ukufinyelela, i-Wi-Fi) ahlala esebenza 24/7 phakathi nokuphela kukagesi.

Amazinga kanye namakilasi amandla

Izindinganiso ze-IEEE ziqinisekisa ukusebenzisana phakathi kwabakhiqizi. Namuhla, kunemindeni emithathu eyinhloko: 802.3af (PoE), 802.3at (PoE+), kanye ne-802.3bt (PoE++). Ngayinye ichaza amandla amakhulu ngembobo ngayinye, ububanzi be-voltage, ukuhambisana kwamanje, nesigaba.

IEEE 802.3af (PoE): Kufika ku-15,4 W kulethwe yi-PSE kanye nobuncane obungu-12,95 W obuqinisekisiwe e-PD. Ilungele amafoni e-VoIP, izinzwa, izindawo zokufinyelela eziyisisekelo, namakhamera angashintshi. Ibanga lesixhumanisi elinconyiwe lingu-100 m, umkhawulo wezinga le-Ethernet; uma ubude besikhathi eside, kukhulu ukwehla kwamandla kagesi. amandla aphansi awusizo ekupheleni kwePD.

IEEE 802.3at (PoE+): Inyusa amandla ku-30W ngembobo ngayinye futhi iqinisekisa u-25,5W ku-PD. Ilungele izindawo zokufinyelela ezinemisakazo eminingi, amakhamera e-PTZ (kuye ngemodeli), namaphaneli olwazi. I-PoE+ PSEs igcina ukuhambisana nokubuyela emuva I-PD PoE.

IEEE 802.3bt (PoE++): Igunyazwe ngo-2018, ingeza izigaba ezimbili. Thayipha oku-3 okuphuma phezulu kokuthi 60W (ene-~51W esebenzisekayo ku-PD) bese Thayipha u-4 uphume ngo-100W (no-~71W osebenzisekayo). Isebenzisa wonke amapheya angu-4 amandla futhi ivumela amadivayisi afunayo —Ukukhanyisa kwe-PoE LED, izimpawu zedijithali, amaklayenti amancane, i-Wi-Fi 6/6E/7- sebenza nge-margin.

Ngokungeziwe ku-IEEE, abanye abakhiqizi banikela ngokuhlukahluka kokuphathelene njengokuthi UPoE (Cisco), ngokomlando 60 W futhi enezandiso eziya ku-90 W ezizukulwaneni zakamuva. Nakuba i-802.3bt iqondanise imakethe namuhla, kuwumqondo omuhle ukuhlola ukuhambisana uma uxuba. izixazululo zabathengisi abaningi.

Amakilasi wamandla

Ukuze kugwenywe ukwaba ngokweqile, ama-PD ahlukaniswa, futhi i-PSE yabela isabelomali ngokusekelwe kulelo klasi. Ku-802.3af, amakilasi 0 kuye ku-3 avela (futhi u-4 ugodlwe ngo-af), kuyilapho ku-802.3at/bt, ububanzi bunwetshwa ukuze kufakwe amakilasi aphezuluQaphela ngesigaba 0: uma umkhiqizi engakucacisi, i-PSE ivamise ukunikeza amandla ngokuzenzakalela njengokungathi yisigaba 3, esingamosha isabelomali uma ukulungiselelwa kungalungiswanga kahle.

Isigaba	Ukusetshenziswa okuvamile	Cishe. amandla ku-PD
0	Ngokuzenzakalelayo (umkhiqizi akacacisi)	kuze kufike ku-~12,95 W
1	Amandla aphansi kakhulu	~ 3,84 W
2	Amandla aphansi	~ 6,49 W
3	Amandla amaphakathi	~ 12,95 W
4	Phezulu (PoE+)	~ 25,5 W

Izigaba zokunikezwa kwamandla kanye nobubanzi be-voltage

Kusetshenziswa amabanga ahlukene kagesi ngesikhathi sokuxoxisana. Kuwusizo ukuqonda lezi ngezinjongo zokuxilonga nezokuklama, njengoba ama-chipset esilawuli (isb., LM507x nokunye okufanayo) elandela amawindi okusebenza. ethize kakhulu.

Isigaba	Kwenzakalani	Ibanga elingu-V elijwayelekile
Ukutholwa	I-PSE iqinisekisa ukumelana kwe-15–33 kΩ ku-PD	~ 2,7–10 V
Ukuhlukaniswa	I-PD ixhumana nesigaba sayo samandla	~ 12,5–25 V
I-Boot	I-voltage isetshenziswa ukuqala ukuhlinzeka	> ~ 38–42 V
Ukusebenza	Ukondla okuzinzile ku-PD	~ 36–57 V

Izindlela zamandla, izikhonkwane nama-topology

Kunezindlela ezimbili zokujova zakudala ku-Fast Ethernet: Imodi A (amandla ngamapheya edatha 1/2 kanye no-3/6) kanye Imodi B (amandla ku-4/5 kanye no-7/8). Ku-Gigabit (1000BASE-T) wonke amapheya amane asetshenziselwa idatha namandla ahlala ndawonye ngaphandle kokuphazamiseka, ngenxa yezindlela zokuhlanganisa ezichazwe yizinga.

Uma sikhuluma ngezakhiwo, sihlukanisa i-PSE Ukuphela kwesikhathi (iswishi ye-PoE enika amandla ngokuqondile) kanye ne-PSE I-Midspan (I-PoE injector noma ihabhu ihlanganiswe phakathi kweswishi engeyona i-PoE kanye ne-PD). Lokhu kuhlukaniswa komqondo kusiza ekuhleleni ukunweba: ungagcina iswishi yakho enkulu bese wengeza phakathi nendawo kuphela lapho uzidinga khona; hlola futhi izingxenye zenethiwekhi ukuchaza kangcono i-topology.

I-PoE Esebenzayo vs I-Passive PoE

I-Active PoE (i-IEEE ejwayelekile) ithola futhi ihlukanise ngaphambi kokusebenzisa amandla; kuyinketho kunconyiwe Ngokuphepha, ukusebenza kahle, nokuhambisana, ilungisa amandla ngembobo ngayinye, ivikela kumasekhethi amafushane, futhi inqamule lapho ingayitholi i-PD evumelekile.

I-Passive PoE, ngakolunye uhlangothi, ijova i-voltage engaguquki (12/24/48/54 V ivamile) ngaphandle kwezingxoxo futhi ngokuvamile isebenzisa amapheya 4/5 kanye no-7/8. Kushibhile futhi kulula, kodwa kuza nezingozi: uma uxhuma imishini engafaneleki, ungayilimaza. Ngaphezu kwalokho, uhla lwayo olusebenzayo luvame ukuba lufushane futhi alujabuleli izivikelo kwezinga.

Izinzuzo zangempela nokulinganiselwa

Phakathi kwezinzuzo: ukunciphisa izindleko (ikhebula elilodwa ledatha namandla), umsebenzi omncane womphakathi, ukufakwa ngokushesha ezindaweni eziyinkimbinkimbi (osilingi bamanga, izinsika, amaphasishi), umthamo okukude kuvuliwe/kuvaliwe futhi i-PD iqale kabusha ngokuphatha (i-SNMP/iwebhu), kanye nokulula ukuhlanganisa yonke into ngaphansi kwe-UPS emaphakathi.

Imikhawulo eyinhloko yilezi: ububanzi obujwayelekile be-100 m nge-Ethernet span ngayinye, isabelomali samandla Imvelo elinganiselwe yama-PSE (awukwazi njalo ukunika amandla zonke izimbobo ngamandla aphelele ngesikhathi esisodwa), kanye "nengozi emaphakathi": uma ukushintsha kwe-PoE enika amandla amakhamera amaningi kwehluleka, wonke amakhamera ahlobene azokwehla. Kukhona namamodeli asebenza kahle kakhulu (PoE++) enza izindleko zamakhamera zibize kakhulu. ingqalasizinda.

Isixwayiso esibalulekile: nge-802.3af, amandla asebenzisekayo (12,95 W) angase abe mancane kakhulu kumakhamera e-PTZ afunwayo noma izindawo zokufinyelela; lapha kufanelekile ukuthuthukela PoE + noma i-PoE++ kuye ngezidingo.

Isabelomali samandla nokukhethwa kwemishini

Lapho uthenga iswishi ye-PoE, hlola izinto ezimbili: amandla ngetheku (okuyinto ngayinye esekelayo) kanye ne Isabelomali samandla esiphelele we-chassis. Isibonelo, i-PD eyingqikithi engu-8-port 150W inganika amandla ama-PD angu-25,5W PoE+ ngesikhathi esisodwa; okunye kufanele kube amandla aphansi noma okungewona ama-PoE.

Amaswishi aphethwe akuvumela ukuthi ubeke imikhawulo yembobo, ubeke amandla kuqala (ukuze abucayi angehli uma isabelomali sakho siphela), futhi ugade ukusetshenziswa kwamandla. Amanye amamodeli anamuhla aze akuvumele bhala phezu komkhawulo amandla ekilasi 0/3 PD ukugwema ukumosha.

Ibanga: 100m, imodi enwetshiwe kanye nezandiso

Umkhawulo we-100m awubangelwa amandla, kodwa ungqimba olubonakalayo lwe-Ethernet. Kodwa-ke, ukwehla kwamandla kagesi kuyenyuka ngebanga, ngakho-ke izibalo ze-cable cross-section kanye nesigaba zithinta amandla awusizo ku-PD.

Ukuqhubekela phambili, kunezindlela ezimbili: imodi enwetshiwe amaswishi athile (yehlisa isixhumanisi siye ku-10 Mbps futhi adlulele ku-~250 m ezimweni ezithile) kanye nezandisi ze-PoE (ezisebenzayo) ezikhiqiza kabusha isiginali futhi ziphinde i-PoE. Nge-daisy chain extenders kungenzeka ukufinyelela ~ 400 m ekusetshenzisweni okusebenzayo, futhi kunezixazululo eziqondile ukuthi Bamemezela kufika ku-~1.200 m, njalo ngejubane lokuyekethisa.

Ukuphepha kukagesi, i-EMI kanye nokuthembeka

I-Active PoE ithola, ihlukanise futhi inqamule uma kukhona okungahambi kahle, inciphisa ingozi ukulayisha ngokweqile futhi ivikela kumasekethe amafushane. Ezingeni le-EMI, ukusetshenziswa kokupheya okusontekile nokuhlanganisa okuklanyelwe ukuphilisana kunciphisa ukuphazamiseka; khetha ikhwalithi ye-Cat5e/6 ikhebula futhi uhloniphe i-bend radii nesivikelo lapho kufanele khona.

Indawo yokuhlasela ibalulekile: i-PD engabuyekeziwe kahle ingaba isango lenethiwekhi. Kungakho kuyancomeka ukuthi i-PoE yenza kube lula ukuthunyelwa kukagesi futhi, ngokuhambisanayo, ikuvumela ukuthi ufake isicelo. ukuhlukaniswa (VLAN), QoS nokuphepha ezingeni lokushintsha eliphethwe ukuze kuncishiswe izingozi.

Ukushintsha Kwe-PoE: Izinhlobo Nezimo

Akuphethwe (akuphethwe): xhuma futhi udlale. Ayabiza futhi alungele amakhaya, amahhovisi amancane, noma ukufakwa okulula ngaphandle kwezidingo zokubekwa phambili noma amamethrikhi anemininingwane.

Iphethwe (kuphethwe): Ukubonakala okuphelele nokulawula. Inika amandla ama-VLAN, i-QoS, i-port mirroring, imikhawulo yechweba, i-SNMP/Telnet/CLI, futhi iyisinqumo sebhizinisi, izimboni, ukubhekwa kwevidiyo okuphrofeshinali, kanye I-Wi-Fi ephethwe.

Ungaphinda ukhethe ngokuminyana: kukhona 4, 8, 16, 24, kanye namamodeli echweba angama-48, ane-SFP/SFP+ noma angenayo. Isikali ngokuya ngenani lama-PD futhi uvumele indawo yokukhula; uma uhlela ukufaka amakhamera we-PTZ, izibonisi, noma ama-Wi-Fi APs asezingeni eliphezulu, khetha ukushintsha nge 802.3bt noma ixutshwe (Izimbobo ze-PoE+ ne-PoE++).

Ama-injection, amahabhu kanye nama-splitter

Un PoE injector Iguqula iswishi engeyona ye-PoE ibe iswishi ekwazi u-PoE yamadivayisi angu-1–2. Ayibizi futhi iyashesha ukuphaka. I Ihhabhu le-PoE ihlanganisa ama-injection amaningana ku-chassis eyodwa: ungashintshi ithrafikhi phakathi kwamachweba, indima yawo ukujova amandla ngokuhambisana emigqeni eminingana.

Uma idivayisi okuyiwa kuyo ingeyona i-PoE, a Isihlukanisi se-PoE Ihlukanisa idatha namandla ngokuletha, isibonelo, i-Ethernet + 12 V DC kokokufaka okokusebenza. Kuyindlela elula yokuthuthukisa amakhamera amadala noma ukufinyelela amaphuzu ngaphandle kokwengeza imithombo yendawo.

Izicelo ezifakiwe

Ukubhekwa kwevidiyo ye-IP: Amakhamera alungisiwe kanye ne-PTZ, anamandla okufaka ama-heater amandla noma amakhamera e-IR ngaphandle (qinisekisa amandla). Ukuhlanganiswa nama-VLAN wokubhekwa kwevidiyo kanye nokubeka phambili ukuze kuqinisekiswe ukushelela Kwevidiyo.

I-Wi-Fi: Izindawo zokufinyelela kusilingi noma emaphasishi asebenza ngaphandle komsebenzi kagesi. Ezimweni eziminyene/ezisezingeni eliphezulu (Wi-Fi 6/6E/7) kuhle ukuhlela i-PoE+ noma i-PoE++ kuye ngokuthi ukusetshenziswa okuphezulu.

I-VoIP yocingo: Amafoni anamandla e-Ethernet enza ukunyakaza kwangaphakathi kube lula, agweme ama-adaptha, futhi avumele ukuvalwa okuhleliwe okonga amandla. unamandla.

Ukukhanyisa kwe-PoE: Izibani ze-LED, izinzwa, nezilawuli eziphethwe yisoftware. Ukukhanya nokulungiswa kombala, izibalo zokuhlala, nezimo ezenziwe ngezifiso zingathuthukisa ukunethezeka futhi ukukhiqiza.

IoT nokulawula: izinzwa zezimboni, ukulawula ukufinyelela, izimpawu zedijithali, izindawo zokukhokha, amaklayenti amancane, ngisho amaseli amancane yezokuxhumana.

Izinqubo ezinhle zokuqalisa

Usa I-Cat5e noma ikhebula eliphezulu Ikhwalithi enhle, nesitifiketi sesigaba uma kungenzeka. Isigaba kanye nesigaba sokulahlekelwa komthelela kanye ne-EMI; gwema ukuhlangana okungafanele nezintambo zikagesi.

Hlonipha umkhawulo we-100m ngesixhumanisi ngasinye (noma sebenzisa imodi enwetshiwe/izandiso lapho kufanele khona). Uma usebenzisa i-“Long Range PoE” ekushintsheni, cabanga ngokunciphisa ukudlula ku-10 Mbps kulowo mugqa.

Bala isabelomali samandla ngokufingqa ukusetshenziswa kwawo wonke ama-PD. Engeza imajini yeziqongo kanye neyodwa ngaphezulu Ukuguqulwa kwe-DC/DC ekugcineni. Ku-PoE++, ukuchithwa kokushisa komshini nakho kuyisici.

Khetha i-IEEE esebenzayo i-PoE kune-passive PoE ukuze unciphise izingozi. Sebenzisa kuphela ama-injection asetshenziswayo lapho okokusebenza okuthile kudinga futhi ukwazi ukusebenza kwawo kahle. ukubekezelela we-voltage.

Imininingwane kagesi kanye neziguquli ze-DC/DC

Amandla kagesi asebenzayo acishe abe ngu-48–54 V DC, kodwa ama-PD amaningi adinga u-12 V, 5 V noma 3,3 V. Ngakho-ke, Isiguquli se-DC/DC (ngokuvamile uhlobo lwemali) enobubanzi bokufakwayo obubanzi (isb., 36–57 V) obunzinza okukhiphayo futhi buvikele ekuguquguqukeni.

Phakathi nesigaba sokuhlukanisa, isiguquli se-DC/DC sivamise ukuvalwa ukuze kugwenywe ukuphazamiseka. Uma i-PSE isisebenzisa i-voltage yokuqala, i-PD ishintsha isiteji sayo samandla lapho okokufaka kudlula umkhawulo ochazwe isilawuli.

Ukuphatha, ukuqapha kanye ne-automation

Amaswishi e-PoE aphethwe akuvumela ukuthi uqaphe ukusetshenziswa kwamandla ngembobo, ukuhlela ukuvula amandla/ukucisha amawindi, futhi uqalise kabusha amadivayisi awehlisiwe ngaphandle kokunyakaza. Nge-SNMP, i-syslog, noma ama-API, ungakwazi ezenzakalelayo ukugcinwa kanye nokonga amandla ezindaweni ezigodini.

Ekuthunyelweni okubalulekile (izibhedlela, ezokuphepha, imboni), hlanganisa ukushintshwa kwe-PoE ku-UPS yakho kanye nenkundla yakho yokuqapha. Uma ukushintshwa kwehluleka, umthelela ufinyelela kude; yingakho ukushintsha kwe-PoE kuwusizo. ukuphelelwa umsebenzi (ukunqwabelanisa, izixhumanisi eziyisipele) nokulayisha ukubeka kuqala.

Ukuhambisana kwemishini nokuxuba

Ungaxuba i-PoE kanye namadivayisi angewona we-PoE kunethiwekhi efanayo; amadivayisi okungewona we-PoE awatholi nje amandla futhi adinga owawo umthombo wamandla. Uma ukushintsha kwakho kwe-PoE kusekela izilungiselelo ezinemininingwane, lungisa umkhawulo wamandla ngembobo ngayinye ukuze ugweme imfucuza ngekilasi elingu-0 PD.

Nge-fiber optical akukho conduction yamandla; isixazululo singokuguqula imidiya ekugcineni, kulandele a Shintshanisa amasheya PoE noma umjovo wokondla ama-PD athintayo.

Izici zomzimba ze-pinout nezindlela

Ngo-10/100, i-Mode A isebenzisa u-1/2 (+ polarity) kanye no-3/6 (− polarity) ngamapheya, ukuhlanganisa idatha kanye ne-DC; I-Mode B isebenzisa u-4/5 ku-DC+ no-7/8 ku-DC-, ihlukanisa idatha namandla. Ku-1000BASE-T, wonke amapheya amane aphethe idatha, futhi izithandani ezijwayelekile zinika amandla ngaphandle kokwehlisa isignali. isiginali.

Okokugcina, khumbula ukuthi ama-injection angabizi kakhulu ajwayelekile ngokuvamile afaka intambo engu-4/5 (DC+) no-7/8 (DC-) ngaphandle kokuxoxisana; bangase "basebenze" nama-PD athile ahlobene, kodwa hhayi bonke. 802.3at/bt amadivayisi izosebenza kahle ku-passive.

Amacala ezimboni nezangaphandle

Ezimweni ezinzima, bheka imishini ye-PoE yezimboni (lukhuni) enobubanzi obubanzi bokushisa, ukudlidliza, ukuvikela uthuli/amanzi (isilinganiso se-IP) kanye nokunikezwa kwamandla kagesi angasanele. Okokusetshenziswa kwangaphandle, izindlu ezingangeni manzi, ama-surge suppressors kanye ne-cabling efanelekile UV kanye nomswakama kubalulekile.

Izinhlelo zokusebenza ezijwayelekile: iziteshi ezingaphansi, i-ITS (ithrafikhi ehlakaniphile), izimboni ezizenzakalelayo, amachweba, imigudu, amapherimitha anamakhamera we-PTZ nezinzwa, lapho ukugcinwa nokuqina okukude kubalulekile. ukusika izikhathi yokungasebenzi.

I-PoE nokukhanyisa okuhlakaniphile

Ukukhanyisa kwe-PoE kuhlanganisa izibani ze-LED, izinzwa zokuhlala, nezilawuli ngaphansi kwephakheji yesofthiwe emaphakathi. Iswishi ye-PoE isabalalisa amandla nedatha; isistimu ilungisa ukukhanya/ukushisa kombala, amashejuli ezinhlelo, futhi isebenzisa izibalo ukuze yonge amandla. amandla lapho kungekho msebenzi.

Nge-802.3bt, amaphasishi anamandla, amagumbi okufundela, amahhovisi kanye nezitolo nge-PoE kungenzeka, ngaphezu kokuvumela ukuhlanganiswa ne-HVAC, ukufinyelela nokuphepha ukuze kwakhiwe. izakhiwo ezihlakaniphile ngokunethezeka okukhulu nokusebenza kahle.

Ama-FAQ asheshayo asula ukungabaza okuvamile

Ingabe i-PoE ithinta isivinini? Akubalulekile: ukuhlalisana kwedatha namandla kuhlanganiswe yizinga; nge-Cat6 noma ngaphezulu, ungafinyelela ku-10 Gbps uma yonke ingqalasizinda ikusekela.

Ngingakwazi ukuxhuma idivayisi okungeyona eye-PoE embotsheni ye-PoE? Yebo: I-PSE ithola ukuhambisana ngaphambi kokunikeza amandla. Uma kungenjalo, ayifaki i-voltage. Ngomshini omdala noma ongajwayelekile, qaphela kakhulu, kodwa nge-PoE enikwe amandla. akufanele kube nezingozi.

Ngingakwazi yini ukunika amandla okokusebenza okungeyona i-PoE? Ngesihlukanisi se-PoE, yebo: sihlukanisa idatha futhi ilethe i-12/9/5 V DC emishinini. Iwusizo kumakhamera amadala, amarutha, noma ama-SBC amancane. Ukusajingijolo Pi.

Ingakanani ibanga eliphezulu? 100 m isixhumanisi se-Ethernet ngayinye njengokujwayelekile. Ngezandiso ze-PoE noma izindlela ezinwetshiwe ungadlulela phambili (imvamisa u-250–400 m, ngisho nezisombululo ezizinikele ezingaba ngu-1.200 m) ngokuyekethisa umkhawulokudonsa.

I-PoE isikhule yaba indlela ehlanzekile yokuletha idatha namandla kunethiwekhi nakumadivayisi e-IoT. Ngokuhlela okuhle kwamazinga (af/at/bt), amakilasi, isabelomali samandla, namabanga, uzoba nokufakwa okulula, okuphephile, nokusebenza kahle, okukwazi ukukala ngaphandle kwekhanda elibuhlungu futhi elilungele 24/7.