DAC Cable yog dab tsi? Cov Lus Qhia Kom Paub 2026

Yog tias koj tab tom ntsuam xyuas cov kev xaiv sib txuas rau koj lub chaw khaws ntaub ntawv lossis kev lag luam network, koj yuav tau ntsib lub sij hawm DAC cable. Tej zaum koj tab tom hnyav nws tawm tsam fiber ntau optics lossis AOC thiab xav tsis thoob uas muab tus nqi zoo dua rau koj qhov kev teeb tsa tshwj xeeb. Tej zaum koj tsis paub meej tias qhov passive lossis nquag DAC haum rau koj qhov kev ncua deb, lossis qhov twg AWG qhov ntsuas qhov tseem ceeb rau koj qhov kev xa tawm 100G.

Phau ntawv no qhia cov lus nug ncaj qha. Raws li cov kws kho qhov muag sib txuas nrog ntau tshaj kaum xyoo ntawm kev paub txog kev muab cov transceivers thiab cables rau hyperscale data centers, telecommunications carriers, thiab enterprise networks thoob ntiaj teb, peb tau pab ntau txhiab tus engineers thiab pab pawg neeg muag khoom tshawb xyuas cov kev txiav txim siab no. Cov ntu hauv qab no rhuav tshem DAC thev naus laus zis los ntawm thawj cov hauv paus ntsiab lus, piv rau lwm txoj hauv kev nrog cov ntaub ntawv kev ua tau zoo tiag tiag, thiab muab cov txheej txheem kev txiav txim siab uas koj xav tau los qhia txoj cai cable rau txhua qhov txuas hauv koj cov infrastructure.

 

Yuav ua li cas DAC Cable ua haujlwm

DAC (Direct Attach Copper) cable yog lub siab -kev sib txuas ceev uas sib txuas cov neeg siv tooj liab nrog cov khoom sib txuas sib txuas hauv ib lub rooj sib txoos. Tsis zoo li kev teeb tsa ib txwm xav tau cais cov transceivers thiab thaj cables, DAC xa cov ntsiab lus tiav - rau - taw tes txuas ncaj qha tawm ntawm pob.

Daim duab 1illustrates lub internal architecture ntawm ib tug raug DAC los ua ke. Cov kab hluav taws xob muaj cov khoom siv tooj liab twinaxial, uas yog ob lub rwb thaiv tsev nyob ib puag ncig los ntawm cov ntaub thaiv npog sib koom. Qhov kev taw qhia sib txawv no tshem tawm cov kev cuam tshuam ntawm electromagnetic thiab tswj cov teeb liab kev ncaj ncees ntawm ntau -gigabit speeds. Nyob rau hauv txhua rooj plaub, tus neeg xyuas pib xaus nyob rau hauv ib tug transceiver vaj tse uas muaj cov hluav taws xob interface circuitry. Thaum koj ntxig lub cable rau hauv qhov hloov pauv lossis chaw nres nkoj neeg rau zaub mov, qhov sib xyaw ua ke tswj cov teeb liab txias thaum txoj kev tooj liab nqa cov ntaub ntawv raws li hluav taws xob pulses.

Cov qauv no tshem tawm qhov kho qhov muag - mus rau - kev hloov hluav taws xob xav tau los ntawm kev sib txuas fiber ntau. Qhov tshwm sim yog qis dua latency, txo hwj chim noj, thiab tsawg dua qhov ua tsis tau zoo. Rau khib- nplai kev sib txuas uas qhov kev ncua deb tsis tshua muaj ntau tshaj li ob peb meters, qhov yooj yim no txhais tau tias ntsuas tau tus nqi thiab ua haujlwm zoo.

 

Passive DAC vs Active DAC

Qhov sib txawv ntawm passive thiab nquag DAC txiav txim siab cov ntawv thov twg txhua yam tuaj yeem ua haujlwm. Kev nkag siab txog kev siv thev naus laus zis yuav pab koj kom tsis txhob dhau - qhia txog cov kab hluav taws xob kim uas tsis zoo ua haujlwm zoo, lossis hauv qab - qhia cov kab hluav taws xob uas tsis tuaj yeem tswj cov teeb liab ncaj ncees ntawm qhov koj xav tau.

 

Dab tsi ua rau DAC Passive

Passive DAC cables tsis muaj cov khoom siv hluav taws xob. Cov kev sib xyaw ua ke ntawm txhua qhov kawg tsuas yog muab cov khoom siv hluav taws xob thiab hluav taws xob cuam tshuam rau lub chaw nres nkoj host. Tag nrho cov teeb liab ua, suav nrog kev sib npaug thiab ua ntej - qhov tseem ceeb, tshwm sim hauv qhov hloov lossis NIC es tsis yog hauv cable nws tus kheej.

Qhov kev tsim no ua rau lub zog siv qis heev, feem ntau nyob rau hauv 0.5W rau tag nrho lub rooj sib txoos. Nrog tsis muaj kev nthuav dav circuitry ua kom muaj cua sov, passive DAC khiav txias dua thiab nthuav tawm cov thermal load tsawg kawg nkaus hauv siab - ceev xa tawm. Qhov tsis muaj cov khoom siv tseem ceeb kuj txhais tau tias tsawg dua qhov uas tuaj yeem ua tsis tau, ua rau muaj qhov tshwj xeeb ntev - kev ntseeg tau ntev. Peb tau pom passive DAC cables rub los ntawm decommissioned racks tom qab yim xyoo ntawm kev ua haujlwm tas mus li tseem dhau qhov kev ntsuam xyuas kev ncaj ncees yam tsis muaj kev puas tsuaj.

Txawm li cas los xij, passive cables nyob ntawm tag nrho ntawm cov teeb liab ua lub peev xwm ntawm cov khoom siv txuas nrog. Raws li cable ntev nce, teeb liab attenuation accumulates. Tshaj li qhov kev ncua deb, qhov chaw nres nkoj txais tsis tuaj yeem rov qab tau cov teeb liab degraded txawm tias nws muaj peev xwm sib npaug. Rau 10G SFP + kev sib txuas, qhov kev txwv no yog kwv yees li 7 meters. Rau 100G QSFP28, teeb liab kev ntseeg siab yuav tsum nruj heev, txwv tsis pub dhau mus txog li 5 meters.

 

Dab tsi ua rau DAC Active

Active DAC cables suav nrog cov teeb liab txias hluav taws xob hauv lub transceiver modules. Cov kab hluav taws xob no nthuav dav thiab hloov kho cov teeb liab hluav taws xob ua ntej nws mus rau hauv txoj kev tooj liab thiab dua ua ntej nws mus txog qhov chaw nres nkoj. Qhov kev cuam tshuam nquag no them nyiaj rau cable poob, txuas ntxiv mus txog 10-15 meters nyob ntawm cov ntaub ntawv tus nqi.

Kev lag luam tawm -tawm yog nce kev siv hluav taws xob, feem ntau 1-2W rau ib kab, thiab me ntsis latency ntau dua vim kev ua haujlwm qeeb. Cov kab hluav taws xob tseem raug nqi ntau dua thiab qhia cov khoom siv ntxiv uas tuaj yeem ua tsis tau. Feem ntau, cov teeb meem no tau txais thaum koj xav tau kev ncua ntev, tab sis lawv ua rau DAC ua haujlwm tsis zoo rau kev sib txuas luv luv uas cov kab hluav taws xob ua tau zoo sib npaug.

Ib yam uas yuav tsum tau saib: active DAC modules khiav pom kev sov so rau qhov kov dua li passive. Hauv kev xa tawm tsis ntev los no qhov twg cov neeg siv khoom tau teeb tsa 48 nquag 100G DAC cables nyob rau hauv cov chaw nres nkoj uas nyob ib sab, cov cua sov sib txuas tau nce qhov hloov ntawm qhov kub thiab txias los ntawm 6℃piv rau tib qhov kev teeb tsa nrog passive cables. Yog tias koj thawb cov kev txwv thermal nyob rau hauv siab - ib puag ncig ceev, ua qhov no rau hauv koj txoj kev npaj.

 

 

Txoj Kev Txiav Txim Siab

Xaiv passive DAC thaum koj lub cable khiav ntsuas 5 meters lossis tsawg dua thiab koj ua qhov tseem ceeb tshaj tus nqi qis, qis zog, thiab kev ntseeg siab tshaj plaws. Qhov no suav nrog feem ntau ntawm cov saum toj kawg nkaus - ntawm - kev xa khoom khib nyiab uas cov servers txuas rau lawv cov nplooj ntawv uas nyob ib sab.

Xaiv DAC nquag thaum qhov kev ncua deb ntawm 5-10 meters thiab koj xav khaws cov nqi zoo ntawm tooj liab hla fiber ntau. Tej yam xwm txheej muaj xws li kev sib txuas ntawm cov racks uas nyob ib sab los yog ncav cuag cov kev sib txuas sib txuas ua ke nruab nrab ntawm kab.

Rau kev ncua deb tshaj 10 meters, xav txog AOC lossis ib txwm muaj fiber ntau nrog transceivers. Tus nqi kom zoo dua ntawm tooj liab txo qis ntawm qhov ntev dua, thiab fiber ntau xa cov teeb liab zoo dua yam tsis muaj kev ncua deb - nyob ntawm qhov nyuaj.

Yog tias koj tab tom tsim AI kev cob qhia pawg uas txhua nanosecond ntawm latency cuam tshuam rau gradient synchronization, lo nrog passive DAC txawm tias tus nqi ntawm topology yooj. Qhov ob peb nanoseconds tau txais kev cawmdim rau ib qho hop compound hla ntau txhiab ntawm kev ua haujlwm ua haujlwm ib ob.

 

Specification	Passive DAC	Active DAC
Qhov siab tshaj plaws	5-7m (nyob ntawm qhov ceev)	10-15m
Kev siv fais fab	Tsawg dua 0.5W	1-2W
Latency	Tsawg tshaj qhov ua tau	Nanoseconds siab dua
Tus nqi txheeb ze	Lub hauv paus	30-50% hwm
Hom kev ua tsis tiav	Kev puas tsuaj nkaus xwb	Electronics thiab connectors
Thermal Load	Tsis tsim nyog	Nruab nrab

 

AWG Wire Gauge thiab Transmission Distance

CovAmerican Wire Gauge (AWG) ratingntawm ib tug DAC cable ncaj qha cuam tshuam nws cov yam ntxwv kis tau tus mob. Cov lej AWG qis dua qhia cov neeg ua haujlwm tuab dua nrog cov hluav taws xob qis dua, uas txo cov teeb liab attenuation nyob deb. Txawm li cas los xij, cov cables tuab dua thiab nyuaj rau txoj hauv kev hauv qhov chaw nruj.

30 AWGcables muab qhov siab tshaj plaws hloov tau nrog qhov tsawg tshaj plaws khoov vojvoog. They route easily through dense cable management and fit comfortably in crowded rack environments. Rau kev sib txuas hauv qab 3 meters, 30 AWG muab cov teeb liab txaus ntawm txhua tus nqi cov ntaub ntawv. Feem ntau 1-2 meter DAC cables siv qhov ntsuas no ua lub neej ntawd. Lub cable zoo ib yam li tus qauv USB them cable hauv tes, khoov yooj yim yam tsis nco.

28 AWGcables muab nruab nrab hauv av, txi qee qhov yooj yim rau kev txhim kho teeb liab kev ncaj ncees. Lawv txhawb passive 100G kev sib txuas mus txog 3-4 meters ntseeg tau. Yog tias koj tus txheej txheem khib nyiab qhov tob lossis hloov- mus rau qhov chaw nyob deb ntawm thaj av no, 28 AWG feem ntau sawv cev rau qhov zoo tshaj plaws.

26 AWG and 24 AWGcables maximize kis tau tus mob nyob deb ntawm tus nqi ntawm yooj. Cov thicker conductors no feem ntau pom nyob rau hauv 5-meter passive cables thiab nyob rau hauv active DAC tsim qhov twg lub cable yuav tsum nqa cov teeb liab ntxiv ua ntej amplification. Nyob rau hauv kev xyaum, 24 AWG DAC muaj zog mus cuag ib lub vaj hose. Yog tias koj ua haujlwm tom qab lub khib nyiab tag nrho nrog tsuas yog 10-15cm ntawm kev tshem tawm, yuam kom 5-meter 24 AWG cable rau hauv qhov nruj nruj tuaj yeem ua rau muaj kev ntxhov siab txaus ntshai rau SFP tawb. Peb tau pom khoov qhov chaw nres nkoj tawb los ntawm installers uas underestimated npaum li cas quab yuam cov cables yuav exert.

Thaum txiav txim cables, phim AWG rau koj qhov kev xav tau nyob deb. Kev qhia cov ntsuas tuab dua li qhov tsim nyog ua rau nce nqi thiab teeb meem kev teeb tsa yam tsis muaj kev txhim kho kev ua haujlwm rau kev ua haujlwm luv luv.

 

Dab tsi yog Twinax Cable?

 

Ib tug twinax cable (luv luv rau twinaxial cable) yog ib qho kev tiv thaiv tooj liab cable nrog ob lub conductors sab hauv txheej txheej raws li ib tug twisted khub, siv rau sib txawv siab - ceev signaling nyob luv luv. Nws txawv ntawm coaxial cable, uas yog tsuas yog ib qho chaw nruab nrab ntawm tus neeg xyuas pib, thiab nws tsim cov pob txha ntawm lub cev ntawm txhua qhov kev sib txuas DAC passive shipping hnub no.

 

Kev tsim kho ua raws li cov txheej txheem tshwj xeeb. Ob tug tooj liab conductors, feem ntau 24 mus rau 30 AWG, khiav thaum uas tig mus rau hauv ib tug sib koom dielectric insulator, uas yog ces qhwv nyob rau hauv ib tug ntawv ci los yog braided ntaub thaiv npog thiab tiav nrog ib tug PVC los yog LSZH txheej tsho. Cov geometry ua ke nrog kev tiv thaiv tag nrho
muab twinax ib tug yam ntxwv impedance ntawm ib ncig ntawm 100 ohms thiab suppresses electromagnetic cuam tshuam deb npaum li cas zoo dua ib tug -conductor tsim. Vim hais tias ob lub conductors muaj qhov sib npaug tab sis tsis sib xws, ntau - hom suab nrov tshem tawm ntawm lub receiver es tsis txhob ua txhaum cov ntaub ntawv.

 

Qhov kev tsis lees paub lub suab nrov yog qhov tseeb vim li cas twinax tau dhau los ua qhov nruab nrab rau DAC cov rooj sib txoos. Ntawm 25 Gbaud ib txoj kab thiab saum toj no, lub teeb liab margins sab laug los ntawm unshielded tooj liab evaporate sai. Twinax khaws cia qhov qhib qhov muag txaus rau cov kab hluav taws xob kom ncav cuag 3 txog 5 meters ntawm 100G thiab rau cov kev hloov pauv hloov mus thawb dhau 10 meters. Tib qhov kev tsim kho kuj tseem tshwm sim hauv InfiniBand cables, SATA 3.0 interconnects, thiab qee qhov siab -Speed ​​DisplayPort txuas qhov twg luv - ncav cuag teeb liab ncaj ncees tsis yog - sib tham tau.

 

Ib daim ntawv qhia txog kev siv terminology. Cov ntsiab lus "twinax cable" thiab "DACcable" tau siv sib hloov hauv cov ntawv tshwj xeeb thiab kev yuav khoom sib tham, tab sis lawv tsis zoo ib yam. Twinax hais tshwj xeeb rau kev tsim kho cable. DAC hais txog kev sib sau ua ke nrog kev sib koom ua ke SFP, SFP28, QSFP, QSFP28, QSFP-DD, lossis OSFP modules raug txiav tawm ntawm txhua qhov kawg. Txhua passive DAC yog tsim los ntawm twinax sab hauv, tab sis raw twinax bulk cable tsis muaj cov khoom sib txuas yog cov khoom sib cais siv feem ntau hauv kev cai siv hlua khi thiab kev siv hauv kev lag luam.

 

DAC Cable vs Fiber Optic Solutions

Fiber optic interconnects siv cais transceivers thiab thaj cables tseem yog cov cuab yeej tseem ceeb rau kev ncua deb tshaj li khib nyiab. Kev nkag siab thaum DAC ua rau kev txiav txim siab piv rau thaum fiber ntau muab tus nqi zoo dua yuav tsum tau tshuaj xyuas ntau yam dhau qhov kev txwv yooj yim.

 

Tus nqi sib txawv

Ib qho 3-meter 100G QSFP28 DAC cable feem ntau raug nqi 50-70% tsawg dua li cov tshuaj fiber ntau sib npaug, uas yuav tsum muaj ob lub QSFP28 transceivers ntxiv rau MPO fiber ntau thaj cable. Qhov sib txawv no sib txuas thoob plaws ntau pua lossis ntau txhiab qhov kev sib txuas hauv kev xa tawm loj. Txawm li cas los xij, tus nqi sib txawv nqaim raws li qhov kev ncua deb nce, thiab fiber ntau ua rau kev lag luam ntev dua qhov koj xav tau DAC nquag lossis ntau ntu txuas.

 

Kev txiav txim siab ua haujlwm

DAC yuav tsum tsis txhob ntxuav ua ntej kev teeb tsa. Lub ntsej muag kawg ntawm fiber ntau yuav tsum tau kuaj xyuas thiab ntxuav kom tsis txhob muaj kev sib kis los ntawm kev ua kom pom kev ua haujlwm tsis zoo lossis kev puas tsuaj rau cov transceivers. Nyob rau hauv siab - ib puag ncig kev hloov pauv uas nquag txav, ntxiv, thiab hloov pauv, lub sijhawm txuag nyiaj los ntawm DAC lub ntsaws-thiab- ua si yooj yim tuaj yeem ua tau ntau yam. Peb muaj sijhawm teem sijhawm cov neeg ua haujlwm ua haujlwm cabling: DAC nruab nrab ntawm 15 vib nas this ib qho kev sib txuas piv rau 45-60 vib nas this rau fiber ntau thaum koj suav nrog kev tshuaj xyuas thiab tu.

Fiber muaj kev tiv thaiv tag nrho rau electromagnetic cuam tshuam. Nyob rau hauv ib puag ncig uas muaj EMI qhov tseem ceeb xws li qee qhov chaw tsim khoom lossis qhov chaw nyob ze siab - cov khoom siv fais fab, fiber ntau tshem tawm qhov muaj peev xwm ntawm qhov yuam kev me me uas tooj liab tsis tuaj yeem sib xws.

 

Cov yam ntxwv ntawm lub cev

DAC cables muaj txoj kab uas hla loj dua thiab ruaj khov dua li fiber ntau thaj cables. Nyob rau hauv txoj kev cable nrog kev txwv hla - cheeb tsam ntu, fiber ntau cov hneev taw me me tso cai rau qhov ceev dua. Tus qauv 2-nti cable tais uas yooj yim tuav 80 fiber ntau thaj cables tsuas yog ua kom haum 30-40 DAC cables ntawm qhov sib npaug. Ib yam li ntawd, fiber ntau qhov qis qis qis qis qis ua rau txoj hauv kev los ntawm cov chaw kaw uas yuav ntxhov siab rau DAC cables dhau ntawm lawv qhov tshwj xeeb.

 

Thaum Txhua Tshuab Yeej

Siv DAC rau hauv - khib thiab nyob ib sab - khib kev sib txuas hauv qab 7 meters qhov twg tus nqi optimization tseem ceeb thiab EMI tsis muaj kev txhawj xeeb. Cov nyiaj khaws cia rau ib qhov chaw nres nkoj ntxiv nce ntxiv ntawm qhov ntsuas, thiab kev ua haujlwm yooj yim txo lub sijhawm xa mus.

Siv fiber ntau rau qhov deb tshaj 10 meters, rau inter-kab thiab hla- tsim kev sib txuas, thiab nyob qhov twg electromagnetic cuam tshuam tuaj yeem ua rau tooj liab teeb liab zoo. Kuj tseem xav txog fiber ntau thaum txoj kev txwv tsis pub siv cov kab me me, hloov tau yooj yim dua.

 

DAC Cable vs AOC Cable

Active Optical Cables (AOC)Nyob nruab nrab ntawm DAC thiab ib txwm fiber ntau, siv multimode fiber nyob rau hauv nrog mus tas li txuas optical transceivers. Qhov kev sib xyaw ua ke no sib xyaw ua ke qee qhov zoo ntawm txhua lub thev naus laus zis thaum nthuav qhia nws tus kheej kev lag luam - tawm.

Kev sib piv Architecture

DAC xa cov teeb liab hluav taws xob hla cov khoom siv tooj liab. Lub teeb liab tseem nyob hauv hluav taws xob los ntawm qhov chaw mus rau qhov chaw, tsis muaj kev hloov pauv nyiaj siv ua haujlwm. AOC hloov cov teeb liab hluav taws xob mus rau qhov muag pom ntawm qhov kawg xa tawm, xa lub teeb pulses los ntawm fiber ntau, tom qab ntawd hloov mus rau hluav taws xob ntawm qhov kawg tau txais. Txoj kev kho qhov muag no tshem tawm tooj liab qhov kev ncua deb tab sis ntxiv kev hloov pauv latency thiab kev siv hluav taws xob.

 

Kev ua lag luam ua haujlwm - tawm

Rau qhov sib npaug sib npaug hauv qab 5 meters, DAC xa cov latency qis dua thiab qis zog siv dua li AOC. Cov hluav taws xob- kho qhov muag- hluav taws xob hloov pauv hauv AOC ntxiv kwv yees li 5-10 nanoseconds ntawm latency thiab siv 1-2W ntau zog rau ib qhov txuas. Hauv latency- cov ntawv thov nkag siab zoo li kev lag luam ntau zaus lossis lub sijhawm tswj hwm lub sijhawm, qhov sib txawv no tuaj yeem muaj teeb meem.

AOC ua tau zoo nyob rau hauv 5-100 meter ntau yam uas passive DAC tsis tuaj yeem ncav cuag thiab nquag DAC yuav kim lossis tsis muaj. Cov tub ntxhais fiber ntau kuj ua rau AOC tiv thaiv electromagnetic cuam tshuam thiab tshem tawm cov kev txhawj xeeb crosstalk thaum muaj ntau cov kab txuas ua ke.

 

Lub cev Installation sib txawv

AOC cables hnyav dua li qhov sib npaug DAC sib dhos. 10-meter 100G AOC hnyav li 60% tsawg dua qhov sib npaug DAC nquag. Nyob rau hauv cov nyiaj siv ua haujlwm cable tais lossis kev teeb tsa qhov twg cable hnyav loads qauv, AOC txo cov neeg kho tshuab kev ntxhov siab. Lub thinner, hloov tau yooj yim fiber ntau siv kuj yooj yim routing nyob rau hauv constrained txoj kev.

DAC txoj kev siv tooj liab tuab ua rau nws muaj zog tiv thaiv kev tsim txom ntawm lub cev. Kev sib tsoo ntawm DAC cable tsis tshua muaj kev puas tsuaj mus tas li, thaum fiber ntau hauv AOC tuaj yeem tawg lossis tawg hauv kev ntxhov siab zoo sib xws. Peb kawm tau qhov no nyuaj thaum ib tug dov ntaiv tsoo ib pob ntawm AOC cables thaum lub sij hawm ib tag hmo lub qhov rais. Lub DAC cables nyob rau hauv lub tais uas nyob ib sab ciaj sia tsis muaj teeb meem.

 

Kev Taw Qhia Xaiv

Rau 1-5 meter ntau, DAC muab cov nqi zoo dua thiab kev ua haujlwm latency. Tshaj li 5 metres txog li 30 meters, ntsuas seb qhov txuas ntxiv DAC ncav cuag (10-15m) ua tau raws li koj xav tau lossis seb AOC qhov ntev dua (txog 100m) zoo dua rau koj qhov topology. Rau cov ntawv thov uas xav tau ob qho tib si deb thiab qis tshaj qhov ua tau latency, AOC ntawm nws qhov ntev yam tsawg kawg nkaus tuaj yeem sib tw nrog DAC nquag.

Yog tias koj tab tom tsim GPU pawg rau kev kawm tshuab ua haujlwm qhov twg RDMA latency ncaj qha cuam tshuam rau kev cob qhia, passive DAC tseem yog qhov kev xaiv zoo dua txawm tias AOC yuav ua kom yooj yim cabling. Kev ua haujlwm sib koom ua ke hauv kev cob qhia kev faib tawm yog qhov nkag siab txaus uas cov kws ua haujlwm niaj hnub ntsuas qhov nanosecond - theem latency sib txawv.

Yam ntxwv	DAC	AOC
Transmission Medium	Tooj twinax	Multimode fiber ntau
Tswv Yim Ntau	1-15m	1-100m
Latency	qis tshaj	5-10ns siab dua
Power per Link	0.1-2W	1-3W
EMI Kev Tiv Thaiv	Raug mob	Ua kom tiav
Qhov hnyav	hnyav dua	Sib dua
Durability	Siab crush kuj	Fiber breakage txaus ntshai
Nqi ntawm 3m	qis tshaj	Nruab nrab
Nqi ntawm 30 m	Tsis muaj	Kev lag luam feem ntau

 

Hom DAC Cables los ntawm Qib Qib

Txhua tiam ntawm Ethernet thiab kev sib txuas sib txuas tau coj cov qauv hloov pauv tshiab thiab cov DAC sib txawv. Cov ntu hauv qab no piav qhia txog cov kev xaiv tam sim no, suav nrog cov lus qhia siv tau ntawm tus nqi -kev ua tau zoo, kev txwv, thiab kev siv tsim nyog.

 

10G SFP Ntxiv DAC Cable

Lub 10G SFP + DAC cable tseem yog ib qho ntawm cov kev sib txuas sib txuas hauv kev lag luam cov ntaub ntawv. Nws txhawb 10 Gigabit Ethernet, 10G Fiber Channel, thiab FCoE daim ntawv thov nrog qhov ntev ntawm 0.5m txog 7m passive. Kev ua raws li tus qauv suav nrog SFF-8431, SFF-8432, thiab IEEE 802.3ae.

Ntawm qhov ceev no, cov kab hluav taws xob tsis muaj kev ntseeg siab ncav cuag 7 meters, ua cov qauv siv tsis tsim nyog rau yuav luag txhua lub khib- nplai xa tawm. Cov thev naus laus zis tau paub tab nrog tus nqi sib tw heev, feem ntau qis dua $ 20 rau luv luv. Lub teeb liab kev ncaj ncees margins yog siab dav, lub ntsiab lus txawm tias pob nyiaj siv cables los ntawm cov tuam txhab muaj npe nrov ua tau zoo.

Thawj qhov txwv yog bandwidth. Raws li cov neeg rau zaub mov NICs nce nkoj nrog 25G tus qauv muaj peev xwm, 10G DAC ua rau muaj kev nkag siab zoo tshaj plaws rau kev sib txuas cov cuab yeej cuab tam lossis rau cov ntawv thov uas 10G bandwidth txaus rau yav tom ntej.

 

25G SFP28 DAC Cable

Cov25G SFP28 DAC cablemuab 2.5 npaug ntawm bandwidth ntawm SFP + nyob rau hauv ib tug zoo tib yam lub cev hneev taw. Qhov no ua rau nwsnatural upgrade txoj kev rau ib puag ncig nrog SFP + infrastructure uas twb muaj lawm, raws li tib txoj hauv kev cable thiab khib layouts haum rau cov kab nrawm dua.

Passive ncav cuag li ntawm 5 meters ntawm 25G, txaus rau cov qauv saum toj kawg nkaus - ntawm - khib xa tawm. Cov teeb liab nruj me ntsis kev ntseeg siab piv rau 10G txhais tau tias cable zoo tseem ceeb dua. Lo nrog tsim cov tuam txhab tsim khoom rau kev xa tawm ntau lawm es tsis ua raws li tus nqi qis tshaj plaws. Peb tau pom cov khoom siv ntawm ultra- pheej yig 25G DAC nrog cov khoom siv tiv thaiv tsis zoo uas dhau qhov kev sim txuas yooj yim tab sis tau pom qhov ua yuam kev nce siab nyob rau hauv kev tsheb khiav mus tas li.

Los ntawm tus nqi -ib -gigabit foundations, 25G SFP28 DAC feem ntau raug nqi tsuas yog 20-30% ntau dua 10G SFP+ thaum xa 150% ntau bandwidth. Rau kev xa tawm tshiab lossis kev npaj hloov kho tshiab, kev nqis peev ntxiv feem ntau ua rau muaj kev nkag siab muab lub neej txuas ntxiv ntawm cov txheej txheem nrawm dua.

 

40G QSFP Ntxiv DAC Cable

40G QSFP + DAC cable txhawb nqa 40 Gigabit Ethernet siv plaub txoj kab 10G hauv daim ntawv me me quad-factor pluggable vaj tsev. Nws ua raws li SFF-8436 thiab IEEE 802.3ba 40GBASE-CR4 cov qauv nrog passive ncav cuag 5-7 meters.

Cov tiam no tau pom kev xa tawm dav dav hauv qaum-nplooj architectures ua ntej 100G ua tus nqi- zoo. Lub hauv paus tseem ceeb tseem nyob hauv kev tsim khoom, ua rau 40G QSFP + DAC cuam tshuam rau kev saib xyuas, nthuav dav ntawm cov ntaub uas twb muaj lawm, thiab pob nyiaj siv -paub tshiab tsim qhov twg 40G bandwidth txaus.

Lub peev xwm breakout distinguishes QSFP + nyob rau hauv ntau qhov chaw. 40G QSFP + rau 4x10G SFP + breakout cable hloov ib qho 40G hloov chaw nres nkoj rau hauv plaub qhov kev sib txuas ntawm 10G, ua kom siv qhov chaw nres nkoj loj tshaj plaws thaum txuas rau 10G servers lossis khoom siv.

 

100G QSFP28 DAC Cable

100G QSFP28 DAC cable sawv cev rau lub ntsiab tam sim no rau siab -cov ntaub ntawv chaw ua haujlwm sib cuam tshuam. Plaub 25G txoj kab sib txuas ua ke rau 100 Gigabit Ethernet aggregate bandwidth nrog kev ua raws li SFF-8665 thiab IEEE 802.3bj 100GBASE-CR4.

Passive 100G DAC ncav cuag 3-5 meters nyob ntawm qhov zoo ntawm cable thiab AWG ntsuas. Lub teeb liab nruj dua qhov yuav tsum tau muaj kev ncaj ncees ntawm 25 Gbaud ib txoj kab ua rau kev xaiv cable ntau dua li qhov qis dua. Kev nqis peev hauv cov cables zoo nrog kev tiv thaiv kom raug thiab tsim nyog AWG rau koj qhov kev ncua deb.

Daim ntawv ceeb toom los ntawm peb lub chaw kuaj sim: thaum qhov kev qhia tshwj xeeb tso cai rau 5 meters rau passive 100G, peb qhov kev ntsuas kev ntxhov siab hla ntau lub platform hloov qhia tau hais tias me ntsis yuam kev tus nqi pib nkag mus thaum koj siab tshaj 3.5 meters nrog txhua lub kaum sab xis siab dua 90 degrees hauv txoj kab cable. Rau lub hom phiaj- qhov txuas txuas tseem ceeb, peb feem ntau pom zoo kom nyob qis dua 3 meters lossis nce mus rau DAC nquag yog tias koj qhov topology yuav tsum tau khiav ntev dua.

Lub 100G rau 4x25G breakout configuration ua rau muaj kev sib txuas zoo ntawm 100G qaum keyboards thiab 25G server NICs. Qhov topology no tau dhau los ua tus qauv hauv huab niaj hnub no - teev kev xa tawm, ua rau DAC cables tseem ceeb hauv cov khoom siv hauv tsev. Peb100G QSFP28 DAC portfoliotxhawb nqa ob tus qauv QSFP28-rau-QSFP28 thiab kev teeb tsa kev teeb tsa nrog qhov ntev ntawm 0.5m txog 5m.

 

200G QSFP56 DAC Cable

200G QSFP56 DAC cable muab ob npaug rau 100G bandwidth siv PAM4 teeb liab ntawm 50G ib txoj kab. Cov txheej txheem kev hloov kho no encodes ob lub cim rau ib lub cim es tsis yog ib qho, ua tiav cov ntaub ntawv siab dua yam tsis muaj qhov sib npaug ntawm cov teeb liab zaus.

PAM4's multi-theem signaling txo cov suab nrov margin piv rau NRZ (tsis yog-rov qab-rau- xoom) encoding siv nyob rau tiam dhau los. Passive cable ncav cuag yog li txwv, feem ntau 2-3 meters siab tshaj. Cable zoo thiab kev teeb tsa kev coj ua ua qhov tseem ceeb ntawm cov kev ceev no. Txawm tias cov roj ntiv tes ntawm cov neeg sib txuas, uas yuav tsis muaj mob ntawm 10G, tuaj yeem ua rau tsis sib xws ntawm 200G PAM4 tus nqi.

Kev txais yuav loj hlob nyob rau hauv ib puag ncig hyperscale npaj rau 400G thiab 800G kev hloov pauv. 200G ceev taw tes ua hauj lwm raws li ib tug theem nrab theem thiab raws li ib tug siab -bandwidth server connectivity xaiv. Breakout rau 4x50G los yog 2x100G configurations muab xa mus yooj.

 

400G QSFP-DD DAC Cable

400G QSFP-DD (Double Density) DAC cable ua tiav 400 Gigabit Ethernet siv yim 50G PAM4 kab. QSFP-DD form factor tswj kev rov qab sib raug zoo nrog QSFP28 thiab QSFP56 thaum ua ob npaug ntawm cov hluav taws xob cuam tshuam.

Nyob rau ntawm qhov ceev no, passive DAC ncav cuag shrinks mus rau 1-2 meters rau kev txhim khu kev qha. Kev sib xyaw ua ke ntawm PAM4 signaling thiab kev sib sau ua ke bandwidth siab heev tawm cov npoo tsawg heev rau kev puas tsuaj los ntawm cable. Active 400G DAC txuas mus txog kwv yees li 3-5 meters tab sis ntawm tus nqi tseem ceeb.

Kev xa tawm tam sim no tsom mus rau kev hloov pauv- mus rau- hloov kab laug sab txuas thiab siab -bandwidth cia txuas qhov twg qhov kev ncua deb tau txais. Cov400G rau 4x100G breakout cablemuab txoj hauv kev tseem ceeb ntawm kev tsiv teb tsaws chaw, tso cai rau 400G- muaj peev xwm hloov pauv mus txuas nrog 100G infrastructure uas twb muaj lawm.

 

800G DAC Cable

800G DAC cable sawv cev rau cov thawj coj tam sim no, muaj nyob rau hauv ob qho tib si QSFP-DD800 thiab OSFP daim foos. Yim txoj kab ntawm 100G PAM4 signaling xa 800 Gigabit aggregate bandwidth rau tom ntej - tiam hyperscale daim ntaub ntawv.

Ntawm cov kev ceev no, passive tooj liab ncav cuag tsis tshua muaj kev txwv, feem ntau 1 meter lossis tsawg dua rau kev lag luam txhim khu kev qha. Feem ntau 800G kev xa tawm siv AOC lossis fiber ntau rau txhua qhov tab sis qhov sib txuas luv tshaj plaws. Active 800G DAC tseem yog ib pawg tshiab uas muaj tsawg thiab tus nqi hwm.

Xav txog 800G infrastructure rau kev tsim kho hyperscale tshiab thiab AI / ML pawg xa tawm qhov twg bandwidth xav tau los ua pov thawj rau kev nqis peev. Rau feem ntau ntawm kev lag luam ib puag ncig, 100G thiab 400G tseem muaj kev xaiv ua tau zoo dua nrog tus nqi zoo dua - qhov ua tau zoo.

 

Breakout DAC Cables rau kev sib txuas yooj yim

Breakout DAC cables phua ib qhov siab - chaw nres nkoj ceev mus rau ntau qhov qis dua - kev sib txuas ceev, ua kom muaj txiaj ntsig topology tsim thiab gradual migration paths ntawm ceev tiam.

Cov kev teeb tsa feem ntau txuas nrog 100G QSFP28 hloov chaw nres nkoj mus rau plaub 25G SFP28 server NICs. Qhov no topology maximizes hloov chaw nres nkoj siv thaum sib piv cov server bandwidth cov cai. Ib qho 48-chaw nres nkoj 100G hloov pauv tuaj yeem ua haujlwm rau 192 servers ntawm 25G txhua qhov, txo cov nqi tsim kho kom zoo dua piv rau qhov sib npaug 25G-tsuas hloov pauv.

Ib yam li ntawd, 400G rau 4x100G breakout cables tso cai rau kev xa tawm ntawm 400G txha nraub qaum keyboards thaum tswj kev sib txuas rau 100G nplooj ntawv hloov thiab qhov kawg. Qhov no khaws cia kev nqis peev hauv 100G infrastructure thaum tsim 400G-cov tub ntxhais muaj peev xwm.

Thaum qhia txog cov kab hluav taws xob tawg, xyuas qhov ntev yuav tsum ua tib zoo. Lub breakout kawg feem ntau kiv cua tawm mus rau hauv plaub cais cables ntawm sib npaug ntev. Tag nrho kev ncav cuag los ntawm QSFP kawg mus rau qhov deb tshaj plaws SFP chaw nres nkoj yuav tsum poob rau hauv cov lus qhia tshwj xeeb, suav txog qhov ntev ntawm cov kab hluav taws xob sib txuas ntxiv rau lwm qhov kev ncua deb ntawm qhov fanout point.

Tswv yim tswv yim: lub fanout point ntawm breakout cables tsim ib tug natural stress concentration. Nyob rau hauv siab - kev xa tawm ceev, siv velcro straps kom ruaj ntseg cable txog 15cm ua ntej fanout, tiv thaiv qhov hnyav ntawm plaub ceg los ntawm kev tso lub zog ntawm lub ntsiab txuas. Peb tau pom cov kev sib txuas tsis ua haujlwm tau taug qab rov qab mus rau qhov tsis txaus siab fanout cov ntsiab lus hauv cov nyiaj siv ua haujlwm cable.

 

Kev siv hluav taws xob thiab thermal tswj

DAC cables siv zog tsawg dua li qhov sib npaug optical transceiver khub, ua rau lawv txaus nyiam rau lub hwj chim -ib puag ncig thiab kev txhawb nqa kev ruaj ntseg. Kev nkag siab txog cov peev nyiaj siv hluav taws xob tiag tiag pab nrog kev npaj muaj peev xwm thiab kev suav thermal.

Passive DAC siv qhov tseem ceeb xoom fais fab dhau qhov tsis pom zoo tam sim no kos ntawm hluav taws xob cuam tshuam. Tus tswv tsev cov cuab yeej transceiver circuitry ua txhua yam teeb liab ua. Rau passive 100G QSFP28 DAC, tag nrho cov kev txhawb zog yog feem ntau nyob rau hauv 0.5W ib qhov txuas.

Active DAC ntxiv 1-2W rau kev nthuav dav thiab sib npaug ntawm cov khoom siv hluav taws xob. Thaum me me rau -cable, qhov no khaws cia hauv kev xa tawm siab. Ib lub khib nrog 200 nquag DAC kev sib txuas yuav ntxiv 200-400W ntawm thermal load uas yuav tsum tau muaj peev xwm ua kom txias.

Sib piv qhov no rau cov kev daws teeb meem kho qhov muag uas txhua tus khub transceiver siv 2-7W nyob ntawm qib ncav cuag thiab ceev. 100G QSFP28 LR4 transceiver ib leeg kos kwv yees li 3.5W, thiab koj xav tau ob qhov txuas. Kev txuag hluav taws xob los ntawm DAC nyob rau hauv siab - ib puag ncig ceev tuaj yeem txo cov nqi khiav lag luam thiab cov pa roj carbon hneev taw. Thaum npaj ua kom txias rau siab -DAC kev xa tawm, suav rau cov khoom siv hluav taws xob sib xyaw ua ke ntawm cov hloov pauv thiab cov chaw nres nkoj neeg rau zaub mov thiab xyuas kom muaj kev txaus sab pem hauv ntej- rov qab los ntawm cov khoom siv.

 

Hom kab	Passive Power	Lub zog muaj zog
10G SFP +	Tsawg dua 0.1W	0.5-1W
25G SFP28	Tsawg dua 0.15W	0.5-1W
40G QSFP +	Tsawg dua 0.5W	1-1.5W
100G QSFP28	Tsawg dua 0.5W	1.5-2W
400G QSFP-DD	Tsawg dua 1W	2-3W

 

Khoom Compatibility

DAC cables yuav tsum tau lees paub los ntawm cov khoom siv uas lawv txuas. Qhov no yuav tsum tau ua raws li kev sib txuas lus hluav taws xob kom raug thiab cov ntaub ntawv txheeb xyuas tau zoo uas tau teev tseg rau hauv cable EEPROM.

Cov hloov pauv loj thiab cov neeg muag khoom server siv cov qib sib txawv ntawm cov neeg muag khoom xauv- nyob rau hauv los ntawm transceiver authentication. Cisco, Juniper, Arista, Dell, HPE, thiab lwm tus muaj cov cai tshwj xeeb coding. Ib lub cable programmed rau Cisco cov cuab yeej yuav tsis pib zoo hauv Juniper ports, txawm tias cov khoom siv hauv qab yog tib yam.

Nov yog qee yam ntawm cov ntawv tshwj xeeb yuav tsis qhia rau koj: txawm tias nyob hauv ib tus neeg muag khoom, cov qauv hloov pauv sib txawv thiab cov firmware versions tuaj yeem coj txawv txawv nrog peb - tog cables. Peb tau ntsib cov xwm txheej uas DAC cable ua haujlwm zoo kawg nkaus ntawm ib tus qauv Cisco Nexus tab sis cuam tshuam DOM ceeb toom rau lwm tus khiav NX tshiab dua-OS version. Qhov txuas ua haujlwm, tab sis cov lus ceeb toom cluttered saib xyuas dashboards. Qhov kev kho yuav tsum muaj firmware-kev kho EEPROM tshwj xeeb. Thaum xaj cov cables rau ib puag ncig sib xyaw, muab koj cov qauv hloov pauv thiab cov firmware tam sim no kom tsis txhob mob taub hau.

Zoo thib peb- tog DAC cov tuam txhab tsim cov kab hluav taws xob rau cov neeg muag khoom tshwj xeeb sib raug zoo. Thaum txiav txim, qhia koj tus qauv cov cuab yeej siv tiag tiag kom paub meej tias coding kom raug. Ntau- chaw muag khoom ib puag ncig yuav xav tau cov kab hluav taws xob uas tsim los rau txhua tus neeg muag khoom es tsis yog coding generic.

Tag nrho cov DAC cables yuav tsum ua raws li qhov muaj feem xyuam rau Multi-Source Agreement (MSA) cov qauv: SFF-8431/8432 rau SFP+, SFF-8436 rau QSFP+, SFF-8665 rau QSFP28, thiab QSFP-DD MSA rau 400G. Cov kev qhia tshwj xeeb no ua kom cov neeg kho tshuab thiab hluav taws xob sib cuam tshuam ywj pheej ntawm cov neeg muag khoom tshwj xeeb authentication yuav tsum tau.

Ua ntej kev xa tawm ntau lawm, ib txwm siv cov khoom siv cable tshiab nrog koj cov cuab yeej tshwj xeeb. Cov tuam txhab muaj npe nrov muab kev ntsuas kev sib raug zoo tiv thaiv lub platform loj thiab tuaj yeem muab cov ntawv ceeb toom los yog kev sib raug zoo matrices ntawm kev thov.

Ib qho ntxiv uas tsim nyog hais txog: nyob rau hauv siab - kev xa tawm ceev, cov yas rub tab ntawm DAC connectors ua ib qho tseem ceeb heev. Thaum cov chaw nres nkoj tau ntim ntawm 0.7mm sib nrug thiab koj cov ntiv tes tsis tuaj yeem ncav cuag qhov tso tawm latch, qhov zoo rub tab yog qhov sib txawv ntawm 10-thib ob cable sib pauv thiab 5- feeb tawm tsam nrog rab koob-qhov ntswg pliers. Peb tshwj xeeb thov rub-tab tsim ntawm txhua qhov kev txiav txim ntau vim li no.

 

DAC Cable FAQs

 

Xaus

DAC cables xa cov nqi tsis sib xws - ua haujlwm tau rau luv - nrug, siab - bandwidth data center txuas. Los ntawm kev nkag siab txog qhov sib txawv ntawm hom passive thiab nquag, xaiv AWG qhov kev ntsuam xyuas uas tsim nyog rau koj qhov kev ncua deb, thiab sib piv cov kab lus tshwj xeeb rau koj qhov kev xav tau, koj tuaj yeem ua kom zoo dua ob qho kev siv peev thiab kev ua haujlwm zoo thoob plaws koj lub network infrastructure.

Lub hauv paus kev txiav txim siab yog ncaj nraim: passive DAC rau kev ncua deb li ntawm 5 meters, nquag DAC rau 5-10 meters qhov twg koj xav khaws cov nqi tooj liab zoo, thiab fiber ntau lossis AOC tshaj 10 meters. Nyob rau hauv cov cheeb tsam no, xaiv cov kab lus tshwj xeeb uas phim koj cov kev xav tau tiag tiag yam tsis muaj kev tshaj lij.

Rau cov kws tshaj lij thiab pab pawg muag khoom soj ntsuam kev sib cuam tshuam kev xaiv, peb caw koj los tshawb xyuas peb qhov ua tiavDAC cable portfoliospanning 10G mus txog 400G ceev. Peb pab pawg kws tshaj lij tuaj yeem pab nrog kev txheeb xyuas kev sib raug zoo, kev cai ntev ntev, thiab ntim tus nqi rau kev xa tawm ntau lawm.

 

Txog Phau Ntawv Qhia no

Cov lus qhia no yog tswj hwm los ntawm pab pawg kws tshaj lij ntawm FB-LINK Technology, lub chaw tsim khoom siv kho qhov muag sib txuas tau tsim nyob rau xyoo 2012. Nrog ntau tshaj 200 tus kws tshaj lij engineering thiab cov kws tshaj lij thiab cov chaw tsim khoom siab tshaj hauv Shenzhen, peb muab cov transceivers, DAC cables, thiab AOC cov kev daws teeb meem rau cov chaw zov me nyuam cov ntaub ntawv thiab kev sib txuas lus thoob plaws rau sab av loj.