Intambo yeAOCvs Ikhebula yeDAC: Yeyiphi eNgcono kuwe

1. I-DAC kunye neeCables ze-AOC zifana ngantoni?
Zombini i-DAC kunye ne-AOC zizisombululo eziqhelekileyo ze-cabling kwinethiwekhi yedatha kwaye zidla ngokusetyenziswa kwi-speed-speed, i-high-reliability interconnection kunye nokuhanjiswa okufunwa ngamaziko edatha, iikhomputha eziphezulu zokusebenza, kunye nezixhobo zokugcina izixhobo ezinkulu.Zombini iziphelo zabo zineendibano zekhebula kunye nee-transceivers ezipheliswe kwifektri, eziqhagamshelwe kumazibuko asisigxina kuphela.Ngaphandle koko, iintambo ze-DAC kunye ne-AOC zingenziwa ngobude obuhlukeneyo ukuxhasa amaxabiso ahlukeneyo edatha yokudlulisa, njenge-10G SFP DAC / AOC cable, i-25G AOC cable, i-40G ikhebula le-DAC, kunye ne-100G ikhebula le-AOC.

2. IiPros and Cons of DAC Cable

IiPros of Direct Qhoboshela Copper Cable

Ixabiso elithe kratya— Ngokuqhelekileyo, ixabiso leentambo zobhedu liphantsi kakhulu kunelo leentsinga zamehlo.Ixabiso leentambo ze-passive copper zi-2 ukuya ku-5 amaxesha aphantsi kuneentambo zefayibha ezinobude obufanayo.Ngoko ke, ukusetyenziswa kweentambo ze-high-speed cable kuya kunciphisa iindleko ze-cabling ze-data data yonke.

Ukusetyenziswa kwamandla asezantsi- Isantya esiphezulu se-DAC (intambo yokudibanisa ngokuthe ngqo) isebenzisa amandla amancinci (usetyenziso lwamandla luphantse lube ngu-zero) kuba iintambo ze-passive azifuni mbane.Ukusetyenziswa kwamandla eentambo zobhedu ezisebenzayo zihlala zijikeleze i-440mW.Ukuba usebenzisa ngokuthe ngqo uncamathisele iintambo zethusi endaweni yeentambo zefayibha ze-AOC, ungagcina amakhulu amawaka eekilowatts zamandla ombane.

Yomelele ngakumbi-Iyilwe ngohlobo loqhagamshelo olungenamthungo lwemodyuli ye-optical kunye nentambo yokukhanya, ecutha iindleko kwaye iqinisekise ukuba izibuko lokukhanya alivezwa luthuli kunye nezinye izinto ezingcolisayo.Ke ngoko, i-DAC ayichaphazeleki kancinci ekonakaleni.

 Ii-Cons of Direct Copper Cable

Enye yezinto ezingalunganga zentambo ye-DAC kukuba inzima kwaye ininzi kune-AOCs.Ukongeza, ichaphazeleka ngakumbi kwisiphumo sokuphazamiseka kwe-electromagnetic kunye nokuthomalalisa kwimigama emide ngenxa yemiqondiso yombane ethunyelwa phakathi kweziphelo zombini.

3. IiPros and Cons of AOC Cable

Iimpawu ze-AOC

Ubunzima obulula-Intambo ye-optical esebenzayo iqulethwe ngama-transceivers optical optical kunye ne-fiber optic patch cable, ubunzima bayo buyingxenye yekota yentambo yobhedu echanekileyo, kwaye ubuninzi bumalunga nesiqingatha sekhebula lobhedu.

Imigama emide-ifayibha ye-AOC inokubonelela ngofikelelo olukhulu nolude oluya kuthi ga kwi-100-300m ngenxa yokutshatyalaliswa kobushushu obungcono kwinkqubo yocingo lwegumbi lekhompyutha kunye neradiyasi yokugoba encinci yentambo yokukhanya.

Ithembeke ngakumbi-Intambo yamehlo esebenzayo ayinamngcipheko wokuphazamiseka kwe-electromagnetic kuba i-fiber ebonakalayo luhlobo lwe-dielectric enokugcina indawo yombane engashukumiyo ngaphakathi kuyo.Umlinganiselo wephutha elincinci lomsebenzi wokuhanjiswa kwemveliso ungcono, kwaye i-BER inokufikelela kwi-10 ^ -15.

Iingxaki ze-AOC

Isiphako esiphambili se-AOC yeentambo zefayibha ezisebenzayo kukuba sisisombululo sendibano ye-cabling ebiza kakhulu kubasebenzi beziko ledatha ephezulu.Ngaphandle koko, ii-AOCs azihlali ixesha elide xa zingalawulwa ngokufanelekileyo kuba zikhaphukhaphu kwaye zibhityile ii-AOCs zikhaphukhaphu kakhulu kwaye zibhityile nto leyo ezenza zibe sesichengeni sokonakala xa zingaphathwanga kakuhle.

4. Uzisebenzisa nini iiCables ze-AOC?

Nangona kunjalo, umgama wothumelo phakathi kwe-ToRs kunye ne-edge core switch uhlala ungaphantsi kwe-100m, apho iisekethe eziDityanisiweyo zisasazwa ngokuxinana.Ke ngoko, intambo esebenzayo ye-optical cable sisisombululo esingcono sokuqhagamshelwa kwedatha ngenxa yokufaneleka kwayo kokukhaphukhaphu, i-diameter encinci yocingo, kunye nokugcinwa okulawulekayo kwe-cabling.Ekubeni iziko ledatha lineenkcukacha eziqinileyo malunga nokuhanjiswa kwesignali, intambo ye-optical esebenzayo ingcono kune-twin-ax intambo ye-DAC kwingqibelelo yesignali kunye noyilo lokudibanisa i-optical, ukunciphisa kakhulu iimpazamo ekusebenzeni kwesignali.Ngaphezu koko, i-high-frequency signal ye-EMI iqhutyelwa ngaphakathi kweemodyuli ze-optical pluggable, intambo ye-fiber ye-AOC inomsebenzi ongcono we-EMI kunentambo ye-DAC.Ngaphandle kwamathandabuzo, intambo ye-AOC lukhetho lwakho lokuqala kuqhagamshelo phakathi kokutshintsha kunye nokutshintsha ngaphakathi kokufikelela okufutshane okanye okuphakathi.

5. Uzisebenzisa nini iiNtambo zeDAC?

Ngokolwakhiwo lwelaphu olubhengezwe nguFacebook, iseva kunye nokutshintsha kweTop-of-Rack (ToR) zenza iyunithi esisiseko yeziko ledatha.Ngokuqhelekileyo, umgama phakathi kwe-ToR kunye ne-NIC yomncedisi (iKhadi le-Network Interface Card) ingaphantsi kweemitha ezi-5.Kule meko, intambo ye-DAC inenzuzo ngakumbi kuneentambo ze-AOC ngokubhekiselele kwindleko, ukusetyenziswa kwamandla, kunye nokusasazwa kobushushu.Ngoko ke, iDAC lukhetho olukhethwayo lweenkqubo zoqhagamshelwano lwe-IDC.Ngaphandle koko, ngezinye izihlandlo ezikhethekileyo, i-100G QSFP28 ukuya kwi-4 * SFP28 DAC lolunye uqhagamshelo oluthe ngqo ngokwemfuno ethile yomsebenzisi yoqhagamshelwano lwedatha.