Umhlobo wabuza ukuba ungasebenzisa umgca wefowuni ukudibanisa i-POE okanye usebenzise iinqununu ezine zocingo lwenethiwekhi ukwenza intloko ye-crystal, abahlobo abaninzi badidekile yintambo yenethiwekhi ye-1236 kunye ne-4578 yeyiphi umbane? Sikwathumele inqaku elifanayo kulo mbuzo, namhlanje siza kwakhona ukuze sibe nokuqonda okubanzi.
1. Yeyiphi kanye ehambisa idatha kwaye inika amandla
Iiswitshi zombongo eziqhelekileyo zinemigangatho emibini, i-802.11af kunye ne-802.11at, kwaye zombini iiswitshi zembongi eziqhelekileyo zixhasa iindlela ezimbini:
① 1236 ithatha zombini idatha kunye nonikezelo lwamandla;
② 1236 hamba idatha, 4578 unikezelo lwamandla;
2. Loluphi uhlobo lonikezelo lwamandla olusetyenziswa ngokwenene
Yeyiphi indlela yonikezelo lwamandla esetyenziswa ngokwenene ixhomekeke kwiUkutshintsha kwePOE, ezo zombini zihambelana neekhamera zethu ze-POE-enabled. Imbongi iya kuyigweba ngokwemeko.
Ngenxa ye-1,2,3, kunye ne-6 ii-cores ezine ezisetyenziswa yi-100 megabytes yonxibelelwano, i-gigabit megabytes yonxibelelwano isebenzisa zonke ii-cores ezi-8.ngoko:
1. Kwi-100 yetriliyoni ye-PoE switch: kuphela i-1,2,3,6 i-wire core edibeneyo, zombini idatha kunye nokunikezelwa kwamandla; kunjalo, ukuba ufuna 1236 data, 4578 unikezelo lwamandla, ke 8 cores ucingo, kwaye uqinisekise 8 cores zonke ezidityanisiweyo.
2. Kwi-Gigabit PoE switch: inqunyelwe yimfuneko yokuhanjiswa kwedatha, kungakhathaliseki ukuba ngaloo ndlela, zonke i-8-core network wire kufuneka zidibaniswe ngokupheleleyo.
3. Zeziphi iindlela ezimbini zokukhetha aUkutshintsha kwePOE
Amandla ombane we-IEEE802.3af yi-15.4W, ukuba amandla ekhamera yi-10W, umbane we-802.af unokusetyenziswa;
IEEE802.3at amandla ombane ombane yi-30W, ukuba amandla ekhamera angama-20W, i-802.3at POE switch kufuneka isetyenziswe;
I-802.3at ihambelana phantsi, ngoko ke iikhamera ze-802.3af-enabled zinokunikwa amandla yi-802.3af okanye ekutshintsheni;
Iikhamera ze-802.3at-enabled zinikwa amandla kuphela ngama-802.3at switch;
Kwezinye izixhobo eziphambili zamandla angaphambili, ezifana nomatshini webhola, amandla aphumayo akakwazi ukuhlangabezana neemfuno, akanakuba yiP i-POE yokutshintsha.
Ngokomzekelo, amandla omatshini abathile bebhola yi-40W, kwaye amandla aphezulu e-port eyodwa ye-PoE ayikho ngaphezu kwe-30W, ngoko ke amandla e-port enye yokutshintsha ayinakufezekiswa, ngoko ke imodyuli ye-POE yomatshini webhola iyadingeka. Ndiyibone kakuhle xa ndiyithenga.
4. Ikude kangakanani ubonelelo lwePOE?
Kumgama wonikezelo lwamandla embongi, kubekho abahlobo abaninzi ababuthathaka beqela leteknoloji ye-VIP bexoxa ukuba ingaba amandla ombane angadlula i-100 yeemitha? Le ngxaki ngokwenene ichatshazelwa yizinto ezininzi, abanye abahlobo abangaphezu kweemitha ezili-100 zokunikezelwa kwamandla abanalo impembelelo, kodwa abanye kwiimitha ze-90 zonikezelo lwamandla nazo bezingazinzanga, esiza kuxoxa ngazo kunye.
Kufuneka ubone i-200 m, 250 m, 300 m iimveliso zombane zePoE ezipapashiweyo kwi-Moments okanye kwi-intanethi. Kuya kubakho ukungathandabuzeki: umgama wokuhanjiswa kwentambo yenethiwekhi awukho iimitha ezili-100? Nguwuphi umgca onokusetyenziswa ukufikelela umgama wepropaganda?
Ngaphezulu kweemitha ezili-100 zokudluliselwa komgama omde kufuneka zibe ngaphezu kweendidi ezi-5, kwaye i-8 ye-core network wire. Kwangaxeshanye, iswitshi ye-poe inikwe amandla ziiseli ezisi-8, kwaye ikhamera kufuneka inikwe amandla ziiseli ezisi-8. Inqaku eliphambili kukuba isixhobo sokutshintsha se-PoE sixhasa imowudi yokwandiswa kwenethiwekhi. Emva kokuvula, xa usebenzisa ukuhanjiswa kwedatha kunye nekhebula lomnatha ongaphezulu, umgama wokunikezelwa kwamandla we-port ehambelanayo unokufikelela ngaphezu kweemitha ezili-100. Kutshintshiselwano lweembongi eziqhelekileyo, sicebisa ukuba kufanelekile ngakumbi ngaphakathi kweemitha ezili-100.
Kutheni kucetyiswa ukuba uyisebenzise ngaphakathi kweemitha ezili-100?
Makhe sijonge ukumelana neengcingo ezahlukeneyo zenethiwekhi.
Ukumelana neemitha ezili-100 zeentlobo zemathiriyeli ezahlukeneyo zocingo olujijekileyo:
1. I-Copper-clad intambo yenethiwekhi yentsimbi: 75-100 Ω
2. I-aluminium ene-copper-clad wire mesh: 24-28 Ω
3. Iphakheji yobhedu intambo yenethiwekhi yesilivere: 15 Ω
4. Intambo yothungelwano yobhedu egqunywe ngobhedu: 42 Ω
5. I-anaerobic copper mesh wire: 9.5 Ω
Umgama umfutshane, uncinci ukuxhathisa, apho ukuxhathisa ucingo lwe-anaerobic copper network luncinci, ngoko lusebenzise ukubonelela ngeyona nto izinzileyo, i-100 yeemitha zokumelana nomgama yi-9.5 Ω kuphela, kuthekani ukuba ukusetyenziswa kweemitha ezingama-50? Emva koko ukuxhathisa kwayo yi-9.5 Ω isiqingatha, incinci ilahleko yonikezelo lwamandla embongi (ilahleko yefomula yamandla, Q=I²Rt, ilahleko yamandla ilingana nochaso), kokukhona uzinzile ngakumbi unikezelo lwamandla. Ke ngaphezu kweemitha ezili-100 zothumelo lomgama, qiniseka ukuba usebenzisa intambo yenethiwekhi elungileyo.
Ixesha lokuposa: Nov-02-2022