Ikhebula le-AOCvs Ikhebula le-DAC: Yikuphi Okungcono Kuwe

1. Yini Izintambo ze-DAC ne-AOC Ezifana Ngayo?
Kokubili i-DAC ne-AOC yizixazululo ezivamile zekhebula zenethiwekhi yedatha futhi ngokuvamile zisetshenziselwa ukuxhumana okunesivinini esikhulu, okuthembeke kakhulu nokudlulisa okudingekayo izikhungo zedatha, amakhompyutha asebenza kahle kakhulu, namadivayisi wokugcina umthamo omkhulu.Zombili iziphetho zazo zinamakhebula ahlanganisa ama-transceivers anqanyulwe efekthri, axhunywe kumachweba angashintshiwe kuphela.Ngaphandle kwalokho, izintambo ze-DAC ne-AOC zingenziwa ngobude obuhlukene ukuze zisekele amanani edatha yokudlulisela ehlukene, njengekhebula le-10G SFP DAC/AOC, ikhebula le-25G AOC, intambo engu-40G DAC, nekhebula le-100G AOC.

2. Izinzuzo kanye Nobubi bekhebula le-DAC

Izinzuzo ze-Direct Namathisela Ikhebula Lethusi

Okungabizi Kakhudlwana— Ngokujwayelekile, intengo yezintambo zethusi iphansi kakhulu kunaleyo yama-optical fibers.Izindleko zezintambo zethusi ezingenzi lutho zishibhe izikhathi ezi-2 kuya kwezi-5 kunezintambo zefayibha ezinobude obufanayo.Ngakho-ke, ukusetshenziswa kwezintambo ezinesivinini esikhulu kuzophinde kunciphise izindleko zekhebula zaso sonke isikhungo sedatha.

Ukusetshenziswa Kwamandla Aphansi— I-DAC enesivinini esikhulu (ikhebula lokunamathisela ngqo) idla amandla amancane (ukusetshenziswa kwamandla cishe kucishe kube ngu-zero) njengoba izintambo ezingenzi lutho azidingi ukunikezwa kwamandla.Ukusetshenziswa kwamandla kwezintambo zethusi ezisebenzayo ngokuvamile kungama-440mW.Uma usebenzisa izintambo zethusi zokunamathisela ngokuqondile esikhundleni sezintambo zefayibha ze-AOC, ungagcina amakhulu ezinkulungwane zama-kilowatts wamandla kagesi.

Ihlala isikhathi eside—Idizayinelwe ngendlela yokuxhumana engenamthungo yemojula yokubona nentambo yokubona, eyehlisa izindleko futhi iqinisekise ukuthi imbobo yokubona ayichayeki othulini nokunye ukungcola.Ngakho-ke, i-DAC isengozini encane yokulimala.

 Ububi be-Direct Namathisela Ikhebula Lethusi

Okunye okungalungile kwekhebula le-DAC ukuthi liyasinda futhi liningi kune-AOCs.Ngaphezu kwalokho, isengozini yokuphazamiseka kagesi kanye nokuncipha kumabanga amade ngenxa yamasignali kagesi adluliswa phakathi kwamaphethelo womabili.

3. Izinzuzo Nezingozi Zekhebula le-AOC

Izinzuzo ze-AOC

Isisindo esilula-Ikhebula le-optical elisebenzayo lakhiwa ama-transceiver amabili optical kanye nekhebula le-fiber optic patch, isisindo sayo siyingxenye yesine kuphela yekhebula le-copper elinamathiselwe ngokuqondile, futhi inqwaba cishe isigamu sekhebula lethusi.

Amabanga amade-ifayibha ye-AOC inganikeza ukufinyelela kokudlulisela okukhulu nokude okungafika ku-100-300m ngenxa yokuncishiswa kwayo ukushisa okungcono ohlelweni lwezintambo lwegumbi lekhompyutha kanye nerediyasi yokugoba encane yekhebuli yokubona.

Inokwethenjelwa Kakhudlwana- Ikhebula elibonakalayo elisebenzayo alikho engozini encane yokuphazamiseka kazibuthe ngoba i-optical fiber iwuhlobo lwe-dielectric engasekela inkambu kagesi emile ngaphakathi kwayo.Izinga lephutha elincane lokusebenza kokuthunyelwa komkhiqizo lingcono, futhi i-BER ingafinyelela ku-10 ^ -15.

Izinzuzo ze-AOC

Isici esiyinhloko sezintambo ze-fiber ezisebenzayo ze-AOC ukuthi iyisixazululo esibiza kakhulu sokuhlanganisa ikhebula sabasebenzi besikhungo sedatha abaphezulu.Ngaphandle kwalokho, ama-AOC awahlali isikhathi eside uma engaphathwa ngendlela efanele njengoba elula futhi azacile ama-AOC alula kakhulu futhi mancane okuwenza abe sengozini yokulimala uma engaphathwa ngendlela efanele.

4. Uzisebenzisa nini izintambo ze-AOC?

Noma kunjalo, ibanga lokudlulisela phakathi kwama-ToR namaswishi ayinhloko onqenqemeni ngokuvamile lingaphansi kuka-100m, lapho amasekhethi Ahlanganisiwe asetshenziswa ngokuminyene.Ngakho-ke, ikhebuli yokubona esebenzayo iyisixazululo esingcono sekhebula soxhumo lwedatha ngenxa yokufaneleka kwayo kokungasindi, i-diameter yocingo oluncane, nokugcinwa kwekhebula okulawulekayo.Njengoba isikhungo sedatha sinokucaciswa okuqinile ekudlulisweni kwesignali, ikhebula elibonakalayo elisebenzayo lingcono kunentambo ye-DAC ye-twin-ax kubuqotho besignali kanye nomklamo wokuhlanganisa optical, okunciphisa kakhulu amaphutha ekucubunguleni isignali.Ngaphezu kwalokho, isignali ye-EMI yemvamisa ephezulu icutshungulwa ngaphakathi kwamamojula optical axhunyiwe, ikhebula le-fiber ye-AOC linokusebenza okungcono kwe-EMI kunekhebula le-DAC.Ngokungangabazeki, ikhebula le-AOC inketho yakho yokuqala ekuxhumekeni phakathi kwamaswishi namaswishi ekufinyeleleni okufushane noma okumaphakathi.

5. Uzisebenzisa nini izintambo ze-DAC?

Ngokwesakhiwo sendwangu esimenyezelwe yi-Facebook, iseva kanye nokushintsha kwe-Top-of-Rack(ToR) bakha iyunithi eyisisekelo yesikhungo sedatha.Ngokuvamile, ibanga eliphakathi kwe-ToR nesiphakeli se-NIC(Network Interface Card) lingaphansi kwamamitha angu-5.Kulesi simo, ikhebula le-DAC linenzuzo kakhulu kunezintambo ze-AOC maqondana nezindleko, ukusetshenziswa kwamandla, nokuhlakazwa kokushisa.Ngakho-ke, i-DAC iyinketho ekhethwayo yamasistimu okuxhumana e-IDC.Ngaphandle kwalokho, ngezikhathi ezithile ezikhethekile, i-100G QSFP28 kuya ku-4*SFP28 DAC iwukuxhumana okuhlukile okuqondile ngokuya ngesidingo esiqondile somsebenzisi soxhumo lwedatha.