Yuav ua li cas xaiv nyob rau sab hauv tsev fiber ntau hom: OM3 VS OM4 vS OS2?
Kev xaiv nyob sab hauv tsev nyob ntawm feem ntau yuav tsum muaj cov ntawv thov luv luv, thiab cov ntaub ntawv sib txuas, thiab cov ntaub ntawv sib txuas thiab ib qho} hom fiber ntau (OS2) npaj rau Ntev - haul txuas siv 1310nm lossis 1550nm DFB (faib tawm tswv yim lossis fabry {{} tso nyiaj. Qhov "OM" kev tsim qauv sawv ntsug rau optical multimode thiab raws cov nomenclature tsim nyob rau hauv iso / i}}-} Cov qauv, thaum "OS" qhia kho kho qhov muag ib qho; Cov kev faib tawm no txhais cov tub ntxhais txoj kab uas hla, thiab chromatic dispersion tus cwj pwm uas txiav txim siab tshaj plaws kis nrug deb ntawm ntau cov ntaub ntawv tus nqi.
Ntau cov lus qhia fiber ntau - om3 thiab om4
Om3 fiber muaj ib qho 50 - micron tub ntxhais lub cheeb tsam uas muab rau cov qhab nia zoo ntawm 2000 ntawm 2000 ntawm 850nm wavelength. Qhov kev qhia tshwj xeeb no txhais tau tias yog 10 lub teeb liab Ethernet Ethernet tuaj yeem ncua cov teeb liab hauv qab no cov kev cuam tshuam nrog kev cuam tshuam nrog kev cuam tshuam nrog kev ua yuam kev Tam sim no ntawm no yog qhov twg nws tau nthuav - om4 fiber siv tib qho kev sib cav sib ceg ntawm 100 mais kev sib tw ntawm cov neeg ua kom muaj zog ntawm 100 / om3) nrog 8 lossis 20 cov kev suav ua haujlwm.
Tus nqi sib txawv ntawm OM3 thiab OM4 CABLE muaj ntau ntau ntau ntau ntxiv {}}}}} me nyuam siv cov nqi tsawg dua vim tias cov nqi zog ua nqi Hauv Hoobkas -} cov kev daws teeb meem. Qee qhov kev yuav khoom tseem qhia txog OM3 rau kev txuag nyiaj tau los ntawm Om4Gbe lossis nrhiav tau cov kev hloov kho tshiab, tab sis cov pinch ntxiv yuav tsis txhawb nqa qhov kev ncua deb uas koj xav tau.
Pom qhov kev ua si no tawm ntawm cov ntaub ntawv hauv tsev kawm qib siab hauv {}}}} {}}}} me nyuam} 120 meter kab rov tav sib txuas ntawm cov chav ua haujlwm. Txhua yam ua haujlwm zoo kom txog thaum lawv sim kho kom muaj QSFP + SR4 transceivers, uas tsuas yog ntsuas rau 100 meters ntawm OM3. Txog 30% ntawm lawv cov kev sib txuas tau tshaj qhov kev ncua deb thiab yuav tsum tau siv fiber ntau dua (kev cuam tshuam nrog lr4 ib-hom transcceivers (4x tus nqi ntawm SR4 multimode optics). Yuav tau them tej zaum $ 3000 ntxiv rau nruab OM4 thaum pib siv $ 45,000 ntawm cov workarounds.
Sing - hom os2 fiber ntau yam ntxwv
OS2 fiber has a much smaller core - 8.2 to 9.5 microns depending on manufacturer and specific design (G.652 versus G.657 bend-optimized variants) - which supports only a single propagation mode at wavelengths above roughly 1260nm, eliminating modal dispersion entirely and allowing transmission distances limited primarily by fiber attenuation (Feem ntau 0.35- 0.40 dB / KM ntawm 1510NM thiab 0.1nm rau cov qauv G.652.D}}}}} ua haujlwm fiber ntau). Cov qauv tsim OS1 hais txog cov fiber ntau nrog rau OS2 DB / KM
Kev siv sab hauv tsev nyob sab hauv OS2 (}}}}} Kev tiv thaiv kev siv tshuab, muab kev tiv thaiv txhua yam tsis muaj cov khoom siv rau furcation; this contrasts with outside plant cables using loose-tube construction where multiple fibers (6-12 typically) sit inside gel-filled tubes that protect against moisture and allow thermal expansion/contraction without stressing the glass. Koj tuaj yeem rub sab nraum zoov xoob- Tube beading nyob rau hauv cov pa luam yeeb (cm Plenum-rated sib xyaw raws li fluoropolymers zoo li FEP lossis PVDF.
Cov Kev Ze Deb Dag Thiab Cov Ntaub Ntawv Kev Lag Luam
Rau 10 gigabet Ethernet, OM3 meters, OM4 txuas ntxiv mus txog 10 kis las}}}} Transmitters, txawm hais tias nyob rau qee kis koj khiav mus rau hauv chromatic dispersion txwv uas yuav tsum tau them nyiaj li cas). Ntawm 40Gbe, multimode kev ncua deb ua kom tiav- om3 meter {} l {l} {hom npog 10 km. This distance collapse happens because 40GbE and 100GbE multimode standards use parallel transmission (4 or 10 fibers per direction) with 10Gbps or 25Gbps per lane rather than a single 40Gbps or 100Gbps serial stream, and the lane rates approach the modal bandwidth limits of the fiber.
Nco ntsoov koj, tseem muaj 40gbase - sr4 bidi uas siv cov roj hmab sib txuas ntawm om4 thiab tag nrho cov khoom siv OM4 ntau dua li qhov tsis muaj kev ncua - Txoj kev ua kom zoo rau CWDM lossis DWDM cov ntawv thov ntawm ib qho kev siv fiber ntau uas koj sim kom ua kom tiav fiber ntau nkawm kev siv.
Thaum twg siv dab tsi
Txoj cai dav dav: multimode rau intera - chaw haujlwm txuas nrog 300 meters uas yog qhov chaw loj uas yuav xav tau luv mais ntau mais. Tsis pub dhau cov lus qhia tawm, OM4 tau dhau los ua cov txheej txheem ntawm kev sib tw tshiab, vim tias xyoo 25Gbe} Txawm hais tias koj tau txais nyiaj ntxiv yog tias koj tau txais nyiaj ntxiv rau kev tuav pov hwm kom muaj kev tiv thaiv rov qab muaj nyob hauv tsib xyoos.
There's also OM5 fiber now, which extends the laser-optimized bandwidth specification to include 953nm wavelength for short-wave wavelength division multiplexing (SWDM) applications - allows 40GbE and 100GbE over duplex LC connections instead of MPO by using four wavelengths (850, 880, 910, 953nm) nrog 10GBs lossis 25GBPs ib nthwv dej. Suab zoo heev hauv txoj kev xav, ua haujlwm zoo hauv kev coj ua, tab sis Transceiver muaj thiab tus nqi nyob ruaj ntseg teeb meem; Raws li ntawm 2024 tus neeg muag khoom xa mus ntxiv rau SR4 Optics rau 40 / 100gbe Multlimode es tsis yog siv tau yooj yim tshwj tsis yog tias koj raug tsim tshwj tsis yog tias koj raug tsim tshwj xeeb. Tus nqi them tus nqi tshaj OM4 khiav txog 25-30%, uas ua rau nws nyuaj muag thaum OM4 twb muaj cov ntaub ntawv feem ntau yuav tsum tau ua.
Ib Leeg - hom yeej ntawm kev ntev-} Term Kev Lag Luam
Nov yog qee yam uas tsis tau hais txog cov neeg muag khoom tus nqi ntau dua, yuav tsum muaj cov nqi hluav taws xob ntau dua, yog li cov khoom siv sib txuas nrog cov nqi hluav taws xob ntau dua) tab sis cov khoom siv hluav taws xob ntev li no. Nruab OS2 fiber hnub no thiab nws yuav txhawb nqa 10Gbe, yog thaum kawg koj tsuas yog hloov pauv hloov pauv, lub fiber nws tus kheej tsis dhau los. Multimode muaj cov thev naus laus zis luv dua vim tias txhua tiam neeg ntau dua-ceev ethernet thawb kom ze rau cov qauv bandwidth; OM1 / OM2 fiber installed nyob rau xyoo 1990 tau ua tsis txaus rau 10Gbe los ntawm nruab nrab-2000s, OM3 los ntawm 2000 zaug hauv hnub 2000 zaug
Tag nrho cov nqi ntawm cov tswv cuab kev xam hla 20 xyoo muaj kev sib txuas nrog ib qho txuas ntxiv uas tau txais kev hloov pauv ntev dua los hloov cov kev hloov pauv ntev ntxiv los txhawb kev hloov kho bandwidth. Qhov teeb meem tau txais kev tswj hwm kom pom zoo cov nqi nce siab dua ntawm cov txiaj ntsig hypothetical yav tom ntej yav tom ntej; CFO pom cov lus rau $ 45K (Multimode) tiv thaiv $ 68K (tsis xav txog cov phiaj xwm xya xyoo tom qab thaum cov neeg muaj peev xwm ua pov thawj tsis txaus.
Ua haujlwm ntawm tsev kho mob network uas lawv tau nruab OM2 fiber (62.5 {-}}}} thiab zoo rau lub sijhawm 1gbe muaj nyob rau lub sijhawm. Los ntawm 2014 lawv xav tau 10Gbe rau cov kev kuaj mob kho mob (CT ntsuas dua tshiab 10gbe rau cov ntaub ntawv loj), tab sis OM2 tsuas yog muaj cov ntaub ntawv loj (CLO) Tas mus txhim kho ib leeg ib leeg - Cov ntoo hluav taws xob hauv ib qho chaw (vim tias tam sim no muaj ob qho kev sib txuas tau ua rau tsawg dua qhov tseem ceeb, ib qho rau qhov chaw kuaj mob. Tag nrho cov nqi cuam xws li kev cuam tshuam rau tsev kho mob tej zaum yuav ntaus $ 200k, piv rau tej zaum yog $ 80k yog tias lawv yuav teeb tsa ib leeg-hom pib.
Cov Hom Txuas Txuas thiab Cov Txheej Txheem Polarity
OM3 / OM5 MULTIMODE feem ntau yog siv LC Duplex txuas rau 1 / 10Gbers Pauv (8, 12, 12, 12, lossis 24 tus neeg sib txuas hauv ib lub duab plaub hau). MOPO qhov xwm txheej tau nyuaj vim tias muaj peb txoj kev polarity (txheej txheem B, Txoj kev sib txuas nrog cov khoom siv tsis sib xws tab sis yuav tsis dhau tsheb; Kuv tau siv tag nrho ntau zaus daws teeb meem "tuag" 40gbe txuas uas tau hloov mus ua tus txheej txheem breaked rau cov txheej txheem b breaking sib dhos.
OS2 Sing {{- hom yuav luag txhua lub sijhawm, nrog SC kev sib koom ua dua tshiab (1990} {{3000} Qee ultra - siab {8} {{{{{{{{{}}}} Cov ntaub ntawv supplex (multi}
Cable kev tsim kho
Cov khoom siv hauv tsev nyob hauv ntau hom kev tsim kho {}} buffered fuffers txhua nrog nws tus kheej lub tsho yooj yim sab hauv lub tsho sab hauv sab nraud), thiab zipcord (ob tight-buffered fibers in a figure-8 cross-section). Kev faib hluav taws xob yog feem ntau tau nyiaj ntau rau cov muaj peev xwm siab suav (12-144 fibers) uas yuav tso tseg rau cov txuas lossis txi mus rau kev sib tw ua ntej; Breakout cable cov nqi ntau dua tab sis muab ib tus neeg muaj fiber ntau, muaj txiaj ntsig rau cov cuab yeej sib txuas ncaj qha yam tsis muaj thaj ua vaj huam sib txuas; Zipcord feem ntau yog rau cov kab luv luv thiab cov dhia dhia.
Plenum versus riser ntsuas kev ntaus nqi rau nec ua raws li cov chaw poob saum toj no, siv cov nplaim hluav taws xob, siv cov pa hluav taws me me thaum tua hluav taws; Riser (CMR lossis NENR) yog pheej yig dua tab sis txwv rau cov duab ntxoo thiab yuav tsum yog hauv kev conduit yog tias qhov chaw plenum. Kev ua yeeb yam sib txawv ntawm plenum thiab riser fiber ntau yog xoom- Nws yog qhov kev nyab xeeb ntawm hluav taws thiab kev ua raws txoj cai. Tus nqi sib txawv sau 20 {{- 40%, uas tsim kev ntxias cable txhua qhov chaw thiab tsis muaj kev tiv thaiv kev tuav pov hwm tsev yog tias muaj hluav taws.
Muaj ib tug neeg ua haujlwm rub rub cov riser - puas muaj qhov ua haujlwm ntawm chaw ua haujlwm lub tsev kawm ntawv rov qab los ntawm ib qho chaw ua haujlwm lub tsev kawm ntawv rov qab los ntawm ib qho chaw ua haujlwm lub tsev kawm ntawv rov qab los ntawm ib qho chaw haujlwm lub tsev ua haujlwm Cov neeg soj ntsuam hauv tsev ntes tau nws thaum lub sij hawm ntxaij- rub tawm nrog kev txhim kho lub sijhawm qeeb uas ua rau muaj kev puas tsuaj rau kev puas tsuaj. Saving plaub grand raug them rau lawv plaub caug grand thiab GC tsis ntiav neeg ntawd dua.
Bend Radius thiab kev tswj hwm kev teeb tsa
Kev ntsuas hluav taws xob Fiber ntau tsis tuaj yeem khoov tau kom nruj li cov thawv me me (}}}}}}}}}}}}}}}}} txwv tsis pub siv rau cov khoom khoov thaum lub sijhawm teeb tsa; Zoo li qub khoov nyob rau hauv kev teeb tsa tas mus li cas tuaj yeem yog kev sib txuas me ntsis (5 x sib txuas rau khoov -}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}} Optimized hom). Tshaj rau cov kev txwv no thiab koj ntxias cov microbently me me uas ua rau cov teeb liab, muaj peev xwm ua rau muaj kev sib tw sib txawv lossis ua tsis tiav thaum ntsuas kev ntxhov siab.
Rub tawm cov nro tseem teeb meem {{let} Phaus qhov ntau rau feem ntau ntawm cov kev teeb tsa feem ntau tab sis tau mus txog kev conduit nrog ntau txoj kev khoov. Tension cov khoom siv muaj tab sis ntxiv tus nqi ua kom teeb tsa, yog li ntau tus neeg cog lus cia li rub kom txog thaum nws hnov tau zoo thiab cia siab tias lawv tsis tshaj kev ntsuas. Qhov no ua rau lub latent puas uas tej zaum yuav tsis pom tam sim ntawd tab sis kev them nyiaj fiber ntau thiab kev ntseeg tau.
Saib maj mam ua cov teeb meem fiber ntau tsis muaj teeb meem Yog li koj tau txais kev teeb tsa uas yuav tsum ua kom zoo, dhau qhov kev lees paub, tom qab pib tsim muaj 18 lub hlis tom qab thaum lawv pib ua tsis zoo li random.
Cov hau kev zoo dua yuav tau kev saib xyuas kom zoo (thiab siv cov kev coj ua kom zoo li cov khoom siv sib txuas thiab siv zog kom muaj fiber ntau tsis yog nyob hauv kev nruj nreem. Cov nqi tej zaum 5 {- 10% ntau dua hauv kev ua haujlwm instation tab sis txwv tsis pub muaj teeb meem kev cia siab ntev.
Tib {-} hom kev faib tawm rau cov ntawv thov sab hauv tsev, thiab 40 / 100gbe tsis xav tau, tsis xav tau, om3 ua haujlwm tau zoo thiab txuag nyiaj; rau 100 {{13- 300 meter sau nrog lub peev xwm yav tom ntej hloov kho mus rau 40Gbe +, OM4 tau muab lub taub hau tsim nyog; Rau dab tsi tshaj li 300 meters lossis lwm qhov txuas uas yuav nyob hauv kev pabcuam ntau tshaj 10 xyoo, ib leeg muab cov nqi ntev dua txawm tias muaj nqi ntau dua. Tsuas yog tsis pheej yig tawm ntawm kev teeb tsa zoo tsis hais txog hom kev ua fiber ntau koj xaiv, vim tias cov kev teeb meem tsis zoo ua kom muaj peev xwm ua tau zoo tshaj plaws.