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

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

Uma wake wazibuza ukuthi ungawasebenzisa kanjani amandla amakhamera e-IP, izindawo zokufinyelela ze-Wi-Fi, noma amafoni e-VoIP ngaphandle kwe-outlet kagesi eseduze, impendulo i -Power over Ethernet (PoE) . Lobu buchwepheshe buvumela idatha namandla ukuthi kuhambe ngekhebula lenethiwekhi elifanayo, okwenza kube lula ukufaka futhi kuncishiswe izindleko ngaphandle kokubeka engcupheni ukuphepha noma ukusebenzisana.

Ngale kwesihloko, i-PoE iyisethi yezindinganiso ze-IEEE ezichaza ama-voltage, ama-current, izigaba zamandla, amaphini asetshenziswayo, kanye nenqubo yokuxoxisana phakathi kwemishini yokunikeza amandla (PSE) kanye nedivayisi enikwe amandla (PD). Ukuqonda ukuthi isebenza kanjani ngaphakathi kukusiza ukuthi ulinganise kahle inethiwekhi yakho, ugweme izinkinga zokwehla kwamandla kagesi, futhi ukhethe iswishi noma i-injector efanele.

Iyini i-PoE futhi isebenza kanjani?

I-PoE ihlanganisa amandla engqalasizinda ejwayelekile ye-Ethernet . I-power injector (PSE, ngokuvamile i-PoE switch noma i-injector) ithola ukuthi idivayisi eqondiwe (PD) iyayisekela yini i-PoE; uma ingasebenzisi, ayisebenzisi amandla. Lokhu kutholwa okuzenzakalelayo kuyisihluthulelo sokuxuba ngokuphephile amadivayisi anikwe amandla yi-PoE kanye namadivayisi angewona amandla yi-PoE ku-LAN efanayo.

Kuhlobo lwayo olujwayelekile, i-PoE isebenzisa inqubo enezigaba ezine: ukutholakala , ukuhlukaniswa , ukuqala , kanye nokusebenza . Ngesikhathi sokutholwa, i-PSE ihlola ukumelana okuphawulekayo phakathi kuka-15 no-33 kΩ ku-PD; ekuhlukanisweni, i-PD imemezela isigaba sayo samandla; ngemva kwalokho, i-PSE isebenzisa i-voltage ukuqala amandla futhi ingena ekusebenzeni okuzinzile. Konke lokhu kwenzeka ngokusobala futhi ngaphandle kokuthinta ithrafikhi yedatha.

Nge-Fast Ethernet, amandla angahamba phezu kwama-data pairs (1/2 kanye no-3/6) noma ama-"free" pairs (4/5 kanye no-7/8). Ku-Gigabit nangaphezulu, wonke ama-pairs amane ayasetshenziswa futhi i-power injection yenziwa kusetshenziswa amasu e-phantom power techniques , kugcinwa i-throughput efika ku-10 Gbps ngekhebula elifanele (Cat6 noma ngaphezulu).

Imininingwane eyodwa esebenzayo: I-PoE isusa isidingo sokufaka izindawo zokufaka ugesi ophahleni oluyimbumbulu noma ezindongeni zesakhiwo, futhi ivumela amandla okusekelayo ahlanganisiwe ku-UPS. Uma iswishi ye-PoE ivikelwe ugesi ongaphazamiseki , wonke ama-PD abalulekile (amakhamera, ukulawula ukufinyelela, i-Wi-Fi) ahlala esebenza amahora angama-24 ngosuku, izinsuku eziyi-7 ngesonto ngesikhathi sokuphela kukagesi.

Amazinga kanye namakilasi amandla

Izindinganiso ze-IEEE ziqinisekisa ukusebenzisana phakathi kwabakhiqizi. Njengamanje, imindeni emithathu emikhulu iyafana: i-802.3af (PoE), i-802.3at (PoE+), kanye ne-802.3bt (PoE++). Ngayinye ichaza amandla aphezulu nge-port, ububanzi bamandla kagesi, ugesi wamanje, kanye nokuhambisana kwesigaba.

I-IEEE 802.3af (PoE) : Kufika ku-15,4 W elethwa yi-PSE kanye nokuqinisekiswa okungenani okungu-12,95 W ku-PD. Ilungele amafoni e-VoIP, izinzwa, izindawo zokufinyelela eziyisisekelo, namakhamera aqinile. Ibanga lesixhumanisi elinconywayo lingu-100 m, umkhawulo we-Ethernet standard; amabanga amakhulu aholela ekwehleni kwe-voltage ephezulu kanye namandla aphansi angasetshenziswa ekugcineni kwe-PD.

I-IEEE 802.3at (PoE+) : Yandisa amandla abe ngu-30W nge-port ngayinye futhi iqinisekisa u-25,5W ku-PD. Ilungele izindawo zokufinyelela ezinemisakazo eminingi, amakhamera e-PTZ (kuye ngokuthi imodeli), kanye namaphaneli olwazi. Ama-PoE+ PSE agcina ukuhambisana okungemuva nama -PoE PD.

I-IEEE 802.3bt (PoE++) : eyavunywa ngo-2018, yengeza amazinga amabili. Uhlobo 3 lufinyelela ku-60 W (ngo-~51 W olusetshenziswa ku-PD) kanye nohlobo 4 lufinyelela ku-100 W (ngo-~71 W olusetshenziswayo). Isebenzisa wonke amabhangqa amane ukuze inikeze amandla futhi ivumela amadivayisi adinga amandla— ukukhanyisa kwe-PoE LED, izimpawu zedijithali, amaklayenti amancane, i-Wi-Fi 6/6E/7 —ukusebenza nge-headroom eyanele.

Ngaphezu kwezindinganiso ze-IEEE, abanye abakhiqizi banikeza izinhlobo ezizimele njenge- UPoE (Cisco), eyayinesilinganiso esingu-60 W ngokomlando kanye nezandiso eziya ku-90 W ezizukulwaneni zakamuva. Nakuba i-802.3bt manje isiyilinganisele imakethe, kuyalulekwa ukuhlola ukuhambisana uma uxuba izixazululo ezivela kubathengisi abahlukahlukene.

Amakilasi wamandla

Ukuze kugwenywe ukwabiwa ngokweqile, amadivayisi okusabalalisa amandla (ama-PD) ayahlukaniswa, futhi i-PSE igcina isabelomali ngokusekelwe kulelo klasi. Ku-802.3af, kuvela amakilasi 0 kuya ku-3 (ngekilasi 4 eligcinelwe i-af), kuyilapho ku-802.3at/bt, ububanzi buyandiswa ukuze bufake amakilasi aphezulu . Qaphela ngekilasi 0: uma umenzi engacacisi, i-PSE ivame ukunikeza amandla ngokuzenzakalelayo njengokungathi yikilasi 3, okungachitha isabelomali uma ukucushwa 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

Ngesikhathi senqubo yokuxoxisana, kusetshenziswa amabanga ahlukene kagesi. Ukuqonda la mabanga kuyasiza ekuxilongeni nasekuklameni, njengoba ama-chipset okulawula (isb., i-LM507x namanye afanayo) asebenza ngaphakathi kwamafasitela athile 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 zakudala zokufaka amandla ku-Fast Ethernet: Imodi A (amandla anikezwa ngama-data pairs 1/2 kanye no-3/6) kanye nemodi B (amandla anikezwa ngama-pairs 4/5 kanye no-7/8). Ku-Gigabit Ethernet (1000BASE-T), wonke ama-pairs amane asetshenziselwa idatha, futhi amandla anikezwa ngesikhathi esisodwa ngaphandle kokuphazamiseka, ngenxa yezindlela zokuhlanganisa ezichazwe yi-standard.

Uma sikhuluma ngezakhiwo, sihlukanisa phakathi kwe-PSE Endspan (iswishi ye-PoE enikeza amandla aqondile) kanye ne-PSE Midspan (i-PoE injector noma ihabhu elihlanganiswe phakathi kweswishi engeyona i-PoE kanye ne-PD). Lokhu kuhlukaniswa komqondo kusiza ekuhleleni ukunwetshwa: ungagcina iswishi yakho eyinhloko bese wengeza ama-midspan kuphela lapho kudingeka khona; futhi ubuyekeze izingxenye zenethiwekhi ukuze uchaze kangcono i-topology.

I-PoE Esebenzayo vs I-Passive PoE

I-Active PoE (IEEE standardized) yenza ukutholwa kanye nokuhlukaniswa ngaphambi kokusebenzisa amandla; kuyindlela enconywayo yokuphepha, ukusebenza kahle, kanye nokuhambisana. Ilungisa amandla nge-port ngayinye, ivikela kuma-short circuits, futhi iyanqamula uma ingawuboni umthombo wamandla osebenzayo.

Ngakolunye uhlangothi, i-Passive PoE ifaka i-voltage engaguquki (12/24/48/54 V ivamile) ngaphandle kwesivumelwano futhi ngokuvamile isebenzisa amaphini angu-4/5 no-7/8. Ishibhile futhi ilula, kodwa ihilela izingozi: uma uxhuma imishini engafanele, ungayilimaza. Ngaphezu kwalokho, ububanzi bayo obusebenzayo buvame ukuba bufushane futhi ayizuzi ekuvikelweni kwezinga elijwayelekile.

Izinzuzo zangempela nokulinganiselwa

Phakathi kwezinzuzo: ukunciphisa izindleko (ikhebula elilodwa ledatha namandla), imisebenzi yokwakha engaphansi, ukufakwa okusheshayo ezindaweni eziyinkimbinkimbi (ophahleni oluyimbumbulu, izinsika, imihubhe), ikhono lokuvula/ukuvala ugesi okude kanye nokuqala kabusha kwe-PD ngokuphathwa (SNMP/web), kanye nokulula kokuhlanganisa konke ngaphansi kwe-UPS ephakathi.

Imikhawulo eyinhloko yile: ububanzi obujwayelekile bamamitha ayi-100 ngesigaba se-Ethernet, isabelomali samandla esinqunyelwe sama-PSE (awukwazi njalo ukunika amandla wonke amachweba ngamandla aphelele ngasikhathi sinye), kanye "nengozi ephakathi": uma iswishi ye-PoE enika amandla amakhamera amaningi ihluleka, wonke amakhamera ahlobene nawo azokwehla. Amamodeli asebenza kahle kakhulu (i-PoE++) nawo ayatholakala, kodwa lokhu kwandisa izindleko zengqalasizinda.

Iphuzu elibalulekile: nge-802.3af, amandla angasetshenziswa (12,95 W) angase angabi namandla kumakhamera e-PTZ adinga amandla noma izindawo zokufinyelela; kuleso simo, kungcono ukushintshela ku -PoE+ noma ku-PoE++ kuye ngezidingo.

Isabelomali samandla nokukhethwa kwemishini

Uma uthenga iswishi ye-PoE, hlola izinto ezimbili: amandla nge-port (okuyi-port ngayinye esekelayo) kanye nesabelomali samandla esiphelele se-chassis. Isibonelo, iswishi enama-port angu-8 enesabelomali samandla esiphelele esingu-150W inganika amandla amadivayisi amahlanu angu-25,5W PoE+ ngesikhathi esisodwa; okunye kuzodingeka kube ukusetshenziswa kwamandla okuphansi noma ungabi ne-PoE nhlobo.

Amaswishi alawulwayo akuvumela ukuthi usethe imikhawulo nge-port ngayinye, ubeke phambili amandla (ukuze ama-port abalulekile anganciphi uma isabelomali siphela), futhi uqaphe ukusetshenziswa. Amanye amamodeli esimanje akuvumela ukuthi weqe umkhawulo wamandla we-Class 0/3 PD ukuze uvimbele imfucuza.

Ibanga: 100m, imodi enwetshiwe kanye nezandiso

Umkhawulo wamamitha ayi-100 awubangelwa ukusetshenziswa kwamandla, kodwa kunalokho ubangelwa ungqimba olungokoqobo lwe-Ethernet. Noma kunjalo, ukwehla kwamandla kagesi kuyanda ngebanga, ngakho-ke ukubalwa kwesigaba sekhebula kanye nesigaba kuthinta amandla angasetshenziswa endaweni yokusabalalisa amandla (PD).

Ukuze siqhubekele phambili, kunezindlela ezimbili: imodi enwetshiwe yamaswishi athile (enciphisa isixhumanisi sibe yi-10 Mbps futhi sinwetshwe sibe cishe yi-250 m ezimweni ezithile) kanye nezandiso ze-PoE ezisebenzayo ezivuselela isignali futhi ziphinde i-PoE. Ngezandiso eziboshwe nge-daisy, kungenzeka ukufinyelela cishe ku-400 m ekusetshenzisweni okusebenzayo, futhi kunezixazululo ezizinikele ezikhangisa cishe ku-1.200 m , njalo zinezinga elithile lesivinini.

Ukuphepha kukagesi, i-EMI kanye nokuthembeka

I-Active PoE ithola, ihlukanise, futhi inqume noma yikuphi ukukhubazeka, inciphise ingozi yokulayisha ngokweqile futhi ivikele kuma-short circuits. Ngokuphathelene ne-EMI, ukusetshenziswa kwama-twisted pair kanye nama-coupling aklanyelwe ukuhlala ndawonye kunciphisa ukuphazamiseka; khetha ikhebula le-Cat5e/6 elisezingeni eliphezulu bese unamathela ezidingweni ze-gond radii kanye ne-shielding lapho kufanele khona.

Indawo yokuhlasela ayilula: i-PD engavuselelwanga kahle ingaba yindlela yokungena kunethiwekhi. Yingakho kwamukelekile ukuthi i-PoE yenza kube lula ukuthunyelwa kukagesi futhi, ngesikhathi esifanayo, ikuvumela ukuthi usebenzise ukuhlukaniswa (ama-VLAN), ama-QoS, kanye nokuphepha ezingeni lokushintsha eliphethwe ukuze kuncishiswe izingozi.

Ukushintsha Kwe-PoE: Izinhlobo Nezimo

Akunakuphathwa : xhuma bese udlala. Ziyabiza futhi zilungele amakhaya, amahhovisi amancane, noma ukufakwa okulula ngaphandle kwezidingo zokubeka phambili noma izilinganiso ezinemininingwane.

Kuphethwe : ukubonakala okuphelele nokulawula. Zivumela i-VLAN, i-QoS, i-port mirroring, imikhawulo ye-port, i-SNMP/Telnet/CLI, futhi ziyisinqumo samabhizinisi, imboni, ukubhekwa kwevidiyo kochwepheshe, kanye ne-Wi-Fi ephethwe.

Ungakhetha futhi ngobuningi: kunezinhlobo ezinezimbobo ezingu-4, 8, 16, 24, kanye no-48, ezinezixhumi zokukhulisa ze-SFP/SFP+ noma ezingenazo. Kala ngokwenani lama-PD bese ushiya isikhala sokukhula; uma ulindele amakhamera e-PTZ, izibonisi, noma izindawo zokufinyelela ze-Wi-Fi eziphezulu, khetha ukushintsha okunama-port angu- 802.3bt noma ama-hybrid (PoE+ kanye ne-PoE++).

Ama-injection, amahabhu kanye nama-splitter

I -PoE injector iguqula i-non-PoE switch ibe yi-PoE-compatible switch yamadivayisi angu-1-2. Ayibizi futhi iyashesha ukuyisebenzisa. I -PoE hub ihlanganisa ama-injector amaningana ibe yi-chassis eyodwa: ayishintshi ithrafikhi phakathi kwamachweba, indima yayo ukufaka amandla ngokuhambisana emigqeni eminingi.

Uma idivayisi eqondiwe ingasebenzi nge-PoE, i -PoE splitter ihlukanisa idatha namandla, iletha, isibonelo, i-Ethernet + 12V DC kokufakwayo kwedivayisi. Lena indlela elula yokuthuthukisa amakhamera amadala noma izindawo zokufinyelela ngaphandle kokwengeza imithombo yamandla yendawo.

Izicelo ezifakiwe

Ukubhekwa kwevidiyo ye-IP : amakhamera aqinile kanye ne-PTZ, anenketho yokunika amandla ama-heater angaphandle noma izinzwa ze-IR (hlola izidingo zamandla). Ukuhlanganiswa nama-VLAN okubhekwa kwevidiyo kanye nokubekwa phambili ukuqinisekisa ukusakazwa kwevidiyo okubushelelezi .

I-Wi-Fi : Izindawo zokungena ophahleni noma emaphasejini asebenza ngaphandle kokusebenza ngogesi. Ezindaweni ezixinene/ezinomthamo ophezulu (i-Wi-Fi 6/6E/7), kuyalulekwa ukuhlela i-PoE+ noma i-PoE++ kuye ngokuthi ukusetshenziswa okuphezulu kangakanani.

Ucingo lwe-VoIP : Amafoni asebenzisa i-Ethernet enza kube lula ukunyakaza kwangaphakathi, asuse ama-adapter, futhi avumele ukuvalwa okuhleliwe ukuze kongiwe amandla.

Ukukhanyisa kwe-PoE : Izibani ze-LED, izinzwa, kanye nabalawuli abaphethwe yisofthiwe. Ukukhanya nokulungiswa kombala, ukuhlaziywa kokuhlala, kanye nezimo ezenziwe ngokwezifiso ezingathuthukisa induduzo kanye nokukhiqiza.

IoT kanye nokulawula : izinzwa zezimboni, ukulawula ukufinyelela, izimpawu zedijithali, ama-kiosk okukhokha, amakhasimende amancane, ngisho namaseli amancane okuxhumana.

Izinqubo ezinhle zokuqalisa

Sebenzisa ikhebula le-Cat5e elisezingeni eliphezulu noma elingaphezulu , elinesitifiketi sekhebula uma kungenzeka. Ingxenye enqamulayo kanye nesigaba kuthinta ukulahlekelwa kanye ne-EMI; gwema ukuxhumana okungafanele ezintanjeni zikagesi.

Hlonipha umkhawulo we-100m ngesixhumanisi ngasinye (noma sebenzisa imodi/izandisi ezinwetshiwe lapho kufanele khona). Uma usebenzisa i-"Long Range PoE" kusuka kuswishi, lindela ukunciphisa kwe-throughput ku-10 Mbps kulowo mugqa.

Bala isabelomali samandla ngokuhlanganisa ukusetshenziswa kwamandla kwawo wonke ama-PD. Engeza imajini yemithwalo ephezulu kanye ne -DC/DC conversion overhead ekugcineni. Ku-PoE++, ukushabalaliswa kokushisa kweswishi nakho kuyisici.

Sebenzisa i-IEEE PoE esebenzayo kune-PoE engasebenzi ukuze unciphise izingozi. Sebenzisa ama-injector angasebenzi kuphela uma kudingeka imishini ethile futhi ujwayelene nokubekezelela kwayo i-voltage .

Imininingwane kagesi kanye neziguquli ze-DC/DC

I-voltage yokusebenza ejwayelekile icishe ibe ngu-48–54 V DC, kodwa ama-PD amaningi adinga i-12 V, 5 V noma i-3,3 V. Ngakho-ke, i-PD ihlanganisa i -converter ye-DC/DC (ngokuvamile uhlobo lwe-buck) enobubanzi bokufaka obubanzi (isb., 36–57 V) obuqinisa umphumela futhi buvikele ekushintsheni.

Ngesikhathi sesigaba sokuhlukanisa, i-DC/DC converter ivame ukuhlala ivaliwe ukuze igweme ukuphazamiseka. Uma i-PSE isebenzisa i-voltage yokuqalisa, i-PD ivula isigaba sayo samandla lapho okokufaka kudlula umkhawulo ochazwe yisilawuli.

Ukuphatha, ukuqapha kanye ne-automation

Amaswishi e-PoE alawulwayo akuvumela ukuthi uqaphe ukusetshenziswa kwamandla nge-port ngayinye, uhlele amafasitela okuvula/okwehlisa amandla, bese uqala kabusha amadivayisi alengayo ukude. Nge-SNMP, i-syslog, noma ama-API, ungenza ngokuzenzakalelayo ukulungiswa futhi wonge amandla ngezikhathi ezingezona ezesikhathi esiphezulu.

Ekusetshenzisweni okubalulekile (izibhedlela, ezokuphepha, imboni), hlanganisa i-PoE switch ku-UPS yakho kanye neplatifomu yokuqapha. Uma i-switch yehluleka, umthelela uba kabanzi; yingakho ukuphindaphindeka ( ukufaka inqwaba, izixhumanisi zesipele) kanye nokubekwa phambili kwemithwalo kubalulekile.

Ukuhambisana kwemishini nokuxuba

Amadivayisi e-PoE kanye namadivayisi angewona e-PoE angaxutshwa kunethiwekhi efanayo; amadivayisi angewona e-PoE awatholi amandla futhi adinga umthombo wawo wamandla. Uma iswishi yakho ye-PoE isekela ukucushwa kwe-granular , lungisa umkhawulo wamandla nge-port ngayinye ukuze ugweme ukuchitha amandla ngama-PD e-Class 0.

Nge-fiber optics akukho ukuhanjiswa kwamandla; ikhambi lifaka i-media converter ekugcineni, kulandelwe yi- PoE switch noma i-injector ukuze kunikwe amandla ama-PD axhunyiwe.

Izici zomzimba ze-pinout nezindlela

Ku-10/100, iModi A isebenzisa i-1/2 (i-polarity enhle) kanye ne-3/6 (i-polarity engemihle) ehlanganisa idatha kanye ne-DC; iModi B isebenzisa i-4/5 ye-DC+ kanye ne-7/8 ye-DC−, igcina idatha kanye namandla kuhlukile. Ku-1000BASE-T, wonke amabhangqa amane aphethe idatha, kanti ejwayelekile ihlanganisa amandla ngaphandle kokwehlisa isignali.

Okokugcina, khumbula ukuthi ama-injector ashibhile avame ukufaka ama-pin angu-4/5 (DC+) kanye no-7/8 (DC−) ngaphandle kwesivumelwano; angase “asebenze” nama-PD athile ahambisanayo, kodwa akuwona wonke amadivayisi angu-802.3at/bt azosebenza kahle kwimodi yokungasebenzi.

Amacala ezimboni nezangaphandle

Ezindaweni ezinzima, funa imishini ye-PoE yezinga lezimboni ( eqinisiwe ) enezinga lokushisa elibanzi, ukuvikelwa ekudlidlizeni, uthuli/amanzi (isilinganiso se-IP), kanye nezinsiza zamandla ezingafuneki. Ezinhlelweni zangaphandle, izivalo ezingangenisi isimo sezulu, izinto ezicindezela ukukhuphuka, kanye nezintambo ezimelana ne-UV kanye nomswakama kubalulekile.

Izinhlelo zokusebenza ezijwayelekile: iziteshi ezincane, i-ITS (ithrafikhi ehlakaniphile), amafektri azenzakalelayo, amachweba, imigudu, ama-perimeter anamakhamera nama-sensor e-PTZ, lapho ukulungiswa okukude kanye nokuqina kunciphisa isikhathi sokungasebenzi.

I-PoE nokukhanyisa okuhlakaniphile

Ukukhanya kwe-PoE kuhlanganisa izibani ze-LED, izinzwa zokuhlala, kanye nabalawuli ngaphansi kwesixhumi esibonakalayo sesofthiwe esiphakathi. Iswishi ye-PoE isabalalisa amandla nedatha; uhlelo lulungisa ukukhanya/ukushisa kombala, luhlela izikhathi zokukhanya, futhi lusebenzisa ukuhlaziya ukonga amandla uma kungenamuntu.

Ngo-802.3bt, ukukhanyisa amaphasishi, amakilasi, amahhovisi, kanye nezitolo nge-PoE kungenzeka, ngaphezu kokuvumela ukuhlanganiswa ne-HVAC, ukufinyelela, kanye nokuvikeleka ukwakha izakhiwo ezihlakaniphile ngenduduzo nokusebenza kahle okukhulu.

Ama-FAQ asheshayo asula ukungabaza okuvamile

Ingabe i-PoE iyayithinta ijubane? Akubonakali: ukuba khona kwedatha namandla kufakiwe ku-standard; nge-Cat6 noma ngaphezulu ungafinyelela ku-10 Gbps uma yonke ingqalasizinda iyisekela.

Ngingakwazi yini ukuxhuma idivayisi engeyona i-PoE echwebeni le-PoE? Yebo: i-PSE ithola ukuhambisana ngaphambi kokuyinika amandla. Uma ingahambisani, ngeke inikeze amandla. Qaphela kakhulu ngemishini emidala noma engeyona ejwayelekile, kodwa uma i-PoE ivuliwe, akufanele kube khona ingozi.

Ngingakwazi yini ukunika amandla amadivayisi angewona ama-PoE? Nge-splitter ye-PoE, yebo: ihlukanisa idatha futhi ilethe i-12/9/5 V DC kudivayisi. Iwusizo kumakhamera amadala, ama-router, noma amakhompyutha amancane ebhodi elilodwa (ama-SBC) njenge -Raspberry Pi.

Ingakanani ibanga eliphakeme? 100 m ngesixhumanisi se-Ethernet ngokwezinga elijwayelekile. Ngezandiso ze-PoE noma izindlela ezinwetshiwe ungaya phambili (250–400 m kuyinto evamile, futhi ngisho nezixazululo ezithile ezingaba ngu-1.200 m) ngokunciphisa i-bandwidth.

I-PoE isikhule yaba yindlela ehlanzekile kakhulu yokuletha idatha namandla kunethiwekhi nakumadivayisi e-IoT. Ngokuhlela ngokucophelela amazinga (af/at/bt), izigaba zamandla, isabelomali, kanye namabanga, uzoba nokufakwa okulula, okuphephile, nokusebenza kahle, okukwazi ukukala kalula futhi okulungele ukusebenza amahora angama- 24 ngosuku, izinsuku eziyi-7 ngesonto.