1. Okucatshangelwayo okuyinhloko kokukhetha ukushintsha kwe-PoE
1. Khetha iswishi ye-PoE evamile
Kukholomu ye-PoE yangaphambilini, sishilo ukuthi iswishi evamile kagesi ye-PoE ingathola ngokuzenzakalelayo ukuthi itheminali kunethiwekhi iyidivayisi ye-PD esekela ukunikezwa kwamandla kwe-PoE.
Umkhiqizo we-PoE ongajwayelekile uwumthombo wamandla wentambo yenethiwekhi yohlobo oluqinile lwedivayisi, enikeza amandla ngokushesha nje lapho ivuliwe.Ngakho-ke, okokuqala qiniseka ukuthi i-switch oyithengayo iyi-switch ye-PoE evamile, ukuze ungashisi ikhamera engaphambili.
2. Amandla wezisetshenziswa
Khetha iswishi ye-PoE ngokuya ngamandla edivayisi.Uma amandla ekhamera yakho yokugada engaphansi kuka-15W, ungakhetha ukushintsha kwe-PoE esekela izinga le-802.3af;uma amandla edivayisi engaphezulu kuka-15W, khona-ke udinga ukukhetha inkinobho ye-PoE yezinga elingu-802.3;uma amandla ekhamera edlula i-60W, udinga ukukhetha i-802.3 BT standard high-power switch, ngaphandle kwalokho amandla awanele, futhi imishini yangaphambili ayikwazi ukulethwa.
3. Inani lamachweba
Njengamanje, kukhona ikakhulukazi amachweba ayi-8, 12, 16, kanye nama-24 kuswishi ye-PoE emakethe.Indlela yokukhetha kuncike enambeni namandla amakhamera axhumeke ekupheleni ukuze ubale isamba senani lamandla.Inombolo yezimbobo ezinamandla ahlukene zinganikezwa futhi zihlanganiswe ngokuya ngenani eliphelele lamandla weswishi, futhi u-10% wezimbobo zenethiwekhi zigciniwe.Qaphela ukukhetha idivayisi ye-PoE amandla ayo okukhiphayo amakhulu kunamandla aphelele wedivayisi.
Ngaphezu kokuhlangabezana nezidingo zamandla, ichweba kufanele futhi lihlangabezane nebanga lokuxhumana, ikakhulukazi ibanga elide (elifana namamitha angaphezu kuka-100).Futhi inemisebenzi yokuvikela umbani, ukuvikela i-electrostatic, anti-interference, ukuvikela ukuphepha kolwazi, ukuvimbela ukusabalala kwegciwane kanye nokuhlaselwa kwenethiwekhi.
Ukukhethwa nokucushwa kwamaswishi e-PoE
I-PoE ishintsha ngezinombolo ezihlukene zamachweba
4. Umkhawulokudonsa wechweba
I-port bandwidth iyinkomba yobuchwepheshe eyisisekelo yeswishi, ekhombisa ukusebenza kokuxhumeka kwenethiwekhi kweswishi.Ukushintsha ngokuyinhloko kunama-bandwidth alandelayo: 10Mbit/s, 100Mbit/s, 1000Mbit/s, 10Gbit/s, njll. Uma ukhetha ukushintsha kwe-PoE, kubalulekile ukulinganisa kuqala ukuhamba kwethrafikhi yamakhamera amaningana.Lapho ubala, kufanele kube nemajini.Isibonelo, ukushintshwa kwe-1000M akukwazi ukulinganiswa ngokugcwele.Ngokuvamile, izinga lokusetshenziswa lilinganiselwa ku-60%, okungaba ngu-600M..
Bheka ukusakaza okukodwa ngokwekhamera yenethiwekhi oyisebenzisayo, bese ulinganisa ukuthi mangaki amakhamera angaxhunywa kuswishi.
Isibonelo, ukusakaza kwekhodi okukodwa kwekhamera engu-1.3 million-pixel 960P kuvame ukuba ngu-4M,
Uma usebenzisa ukushintsha kwe-100M, ungaxhuma amasethi angu-15 (15×4=60M);
Ngokushintsha kwe-Gigabit, amayunithi angu-150 (150×4=600M) angaxhunywa.
Ikhamera engu-2-megapixel 1080P ivamise ukuba nokusakaza okukodwa okungu-8M.
Ngokushintsha kwe-100M, ungaxhuma amasethi angu-7 (7×8=56M);
Ngokushintsha kwegigabit, amasethi angama-75 (75×8=600M) angaxhunywa.
5. Umkhawulokudonsa ongemuva
I-backplane bandwidth isho inani eliphezulu ledatha elingasingathwa phakathi kwe-switch interface processor noma ikhadi le-interface kanye nebhasi ledatha.
I-backplane bandwidth inquma amandla okucubungula idatha weswishi.Ukuphakama komkhawulokudonsa ongemuva, kunamandla amandla okucubungula idatha kanye nesivinini sokushintshana kwedatha;uma kungenjalo, ijubane lokushintshisana ngedatha lihamba kancane.Ifomula yokubala yomkhawulokudonsa wendiza engemuva imi kanje: Umkhawulokudonsa ongemuva = inani lezimbobo × izinga lembobo × 2.
Isibonelo sokubala: Uma iswishi inezimbobo ezingama-24, futhi isivinini sembobo ngayinye siyi-gigabit, bese kuba umkhawulokudonsa wendiza engemuva=24*1000*2/1000=48Gbps.
6. Izinga lokudlulisela iphakethe
Idatha ekunethiwekhi yakhiwe ngamaphakethe edatha, futhi ukucutshungulwa kwephakethe ledatha ngalinye kudla izinsiza.Izinga lokudlulisela phambili (elibizwa nangokuthi i- throughput) libhekisela enanini lamaphakethe edatha adlula ngeyunithi ngayinye yesikhathi ngaphandle kokulahlekelwa kwephakethe.Uma i-throughput incane kakhulu, izoba ibhodlela lenethiwekhi futhi ibe nomthelela omubi ekusebenzeni kahle kokudlulisela kwayo yonke inethiwekhi.
Ifomula yezinga lokudlulisela iphakethe imi kanje: I-Input (Mpps) = Inombolo yezimbobo ze-Gigabit ezingu-10 × 14.88 Mpps + Inombolo yezimbobo ze-Gigabit × 1.488 Mpps + Inombolo yezimbobo ze-Gigabit ezingu-100 × 0.1488 Mpps.
Uma i-throughput ebaliwe ingaphansi kokuphuma komshini, ukushintsha kwesivinini socingo kungafinyelelwa, okungukuthi, izinga lokushintsha lifinyelela isivinini sokudluliswa kwedatha kumugqa wokudlulisela, ngaleyo ndlela kuqedwe ibhodlela lokushintsha ngokwezinga elikhulu kakhulu.
Isikhathi sokuthumela: Jun-09-2022