1G SFP Transceiver Guide: 1000BASE-SX, LX, ZX
Apr 22, 2026| Qhov 1 GSFP transceivertsis mus qhov twg. Tsis yog vim muaj leej twg txaus siab rau gigabit ceev hauv 2026, tab sis vim tias txhua qhov tawm - ntawm -band tswj chaw nres nkoj ntawm koj lub Cisco 9300 pawg, txhua tus IP lub koob yees duab rov qab hauv lub tsev khaws khoom, txhua qhov PLC uplink hauv lub bottling cog tseem khiav ntawm 1G. Cov chaw nres nkoj noj SFP modules los ntawm ntau pua, thiab cov lus nug uas tseem ceeb tsis yog ceev. Nws yog qhov twg 1000BASE variant phim cov fiber ntau uas koj twb muaj nyob rau hauv lub qab nthab, ntawm qhov kev ncua deb nws ua tau khiav, tsis muaj tshuab koj cov peev nyiaj txuas los yog ua rau muaj kev sib raug zoo ntawm qhov hloov pauv.
Qhov ntawd yog qhov no 1G SFP transceiver xaiv phau ntawv qhia npog. Tsis yog daim ntawv spec. Qhov peb tab tom tso tawm ntawm no yog qhov kev txiav txim siab uas peb siv thaum tus neeg siv khoom hu thiab hais tias "Kuv muaj 400 meters ntawm txiv kab ntxwv ntawm ob lub tsev thiab kuv tsis paub tias nws tau rub xyoo twg." Yog tias koj tseem sib piv hla cov theem ceev, pebSFP transceiver xaiv lub moj khaumnpog 1G txog 25G hauv ib tsob ntoo txiav txim siab.
Koj Fiber txiav txim siab, Tab sis Tshawb xyuas Fiber Ua ntej
Qhov pib nrawm tshaj plaws rau kev xaiv ntawm SX, LX, thiab ZX yog txheeb xyuas hom fiber ntau ntawm koj lub vaj huam sib luag, tab sis cov lus teb no tsuas yog ntseeg tau raws li koj cov ntaub ntawv cog qoob loo.Peb muaj kev xa mus rau xyoo tas los ntawm lub tsev kawm ntawv network uas siv cov chaw pab pawg sau npe OM3. DDM nyeem tau zoo rau thawj lub lim tiam ntawm 1000BASE-SX optics, tom qab ntawd cov tswv yim yuam kev pib nce siab . 72 teev tom qab mus-nyob, Cisco C9200L's show interface counters pom 1,100 input yuam kev; lwm 24 teev tom qab ntawd, 1,450. Tig tawm qhov kev sib tshuam -lub tsev khiav yog tiag tiag OM1 los ntawm 2006 rub. Lub tsho aqua tau raug muab khi rau ntawm lub cev txiv kab ntxwv hauv nruab nrab - txoj kev, thiab cov chaw kos duab tsis tau hloov kho. OTDR tau lees paub nws hauv kaum feeb, tab sis kaum feeb ntawd tuaj tom qab ob hnub ntawm kev caum qhov peb tau pib xav tias yog SFP phem.
Hom fiber ntau hauv av txiav txim siab koj SFP, tab sis koj yuav tsum tau kuaj xyuas nws, tsis txhob tso siab rau daim ntawv lo. Thaum koj tau paub tseeb tias koj ua haujlwm nrog dab tsi, lub logic hauv qab no yog qhov ncaj. Cov rooj plaub ntug hauv txhua pawg, txawm li cas los xij, yog qhov kev yuav khoom yuam kev tshwm sim, thiab cov no nyuaj nrhiav hauv cov ntaub ntawv.
SX: Qhov Default rau Multimode, Nrog Kev Sib Tw Sib Tw Tsim Nyog Kev Tshawb Fawb
A 1000BASE-SX modulesiv 850nm VCSEL laser tsim rau multimode fiber ntau. NtawmOM3 lub OM4, koj tau txais tag nrho 550 meters yam tsis muaj kev txhawj xeeb txog lub zog npoo. Ntawm OM1 (62.5µm), uas poob rau ib ncig ntawm 220 meters. Tus lej ntawd tseem ceeb ntau dua li cov neeg xav, vim tias ntau qhov ua ntej -2008 lub tsev kawm ntawv fiber ntau yog OM1, thiab kev khiav ntawm thawj -pem teb IDF thiab pem teb thib peb MDF tuaj yeem yooj yim ntaus 180-200 meters ib zaug koj suav rau ntsug risers thiab kab rov tav routing.
Ntawm kwv yees li 1W ib qhov chaw nres nkoj, SX kuj yog qhov qis tshaj - kev xaiv fais fab hauv gigabit SFP lineup. Thaum koj tab tom sau 48- chaw nres nkoj hloov nrog cov modules rau lub koob yees duab rov qab cov txheej txheem sib sau ua ke, ib lub hnab ntawv thermal ntawm feem ntau cov chaw nkag tau dhau los ua qhov txwv tiag. SX ua rau koj zoo nyob rau hauv nws.
LX ntawm Tib -Hom, thiab Multimode Trap Uas Siv Sijhawm
1000BASE-LXua haujlwm ntawm 1310nm thiab ncav cuag 10km ntawm 9/125µm ib leeg - hom fiber ntau. Nws yog lub neej ntawd rau ib qho chaw hauv tsev kawm ntawv qaum teb lossis tsev kawm ntawv - mus rau - lub tsev txuas khiav ntawm daj- tsho ntaub fiber ntau. Ncaj nraim, kom txog rau thaum ib tug neeg sim khiav LX ntawm multimode, uas yog technically txhawb nqa mus txog 550m tab sis los nrog ib tug mob uas tau ignored nyob rau hauv ib nrab ntawm cov deployments peb pom.
Ib qho kev nthuav dav los ntawm tib daim ntawv tshaj tawm Cisco uas tsis muaj leej twg zoo li hais txog: ntawm OM3 fiber, koj yuav tsumtsis yogsiv MCP tab sis hloov pauv 5dB attenuator. Tau txais ob qho no rov qab thiab koj yuav poob hnub Saturday.
ZX rau Extended Reach, thiab Vim Li Cas Cov Txuas Txuas luv yog qhov teeb meem tiag
Thaum koj ib leeg - hom ncua ntev tshaj 10 km,1000BASE-ZXntawm 1550nm nrog 21dB txuas pob nyiaj siv yog cov lus teb tus qauv. Metro nplhaib kev sib txuas, inter- tsev kawm ntawv ntiav cov tsev kawm ntawv tsaus nti fiber ntau, cov chaw taws teeb backhauls hla 30-40km.
Cov cuab yeej xa tawm uas ntes thawj zaug -lub sijhawm ZX cov neeg yuav khoom tshwm sim ntawm qhov txuas luv, tsis ntev. ZX xa tawm ntawm 0 txog +5 dBm, siab dua LX's -3 mus rau -9.5 dBm ntau. Ntawm qhov kev ncua nrog tsawg dua 8dB ntawm tag nrho cov poob, qhov tau txais photodiode saturates, thiab koj tau txais qhov yuam kev me ntsis lossis qhov txuas tag nrho. Qhov kho yog 10dB inline optical attenuator (LC / UPC, ib hom, tus nqi ruaj khov) ntawm qhov kawg tau txais. Qhov no yuav tsum tau nyob rau hauv koj lub BOM ua ntej lub modules nkoj, tsis yog raws li ib qho kev txiav txim thaum muaj xwm ceev tom qab qhov txuas tsis tuaj.
Peb tau khiav mus rau qhov muaj txiaj ntsig zoo ntawm lub tsev kawm ntawv tsim khoom: ob lub tsev sib nrug 6km sib nrug los ntawm kev xauj qhov tsaus nti fiber ntau nrog plaub qhov sib txuas. LX yuav tsum tau ua haujlwm ntawm qhov kev ncua deb, tab sis OTDR tau pom 11.4dB tag nrho qhov poob qis, zoo dhau los LX qhov siv tau zoo ib zaug koj ntxiv cov kev sib txuas poob ntawm ob qho kawg. Cov kev xaiv tau rov-spling lub fiber (ob-lub limtiam tus neeg muag khoom lub sijhawm ua haujlwm, $ 2,800 nqe lus) lossis poob rau hauv ZX modules nrog attenuators. ZX ntxiv rau ob lub attenuators xa tawm hauv 20 feeb thiab raug nqi kwv yees li 80-90% tsawg dua qhov re-splice. Qhov txuas tau ua haujlwm txij li thaum, tab sis peb yuav tsum rov qab mus rau rau lub hlis tom qab thiab rov- ntxuav cov khoom sib txuas thaum RX fais fab pib drifting. Qhov ntawd yog ib feem ntawm cov dab neeg no uas feem ntau tau tso tseg: muaj ib txwm ua raws.
Yuav Thib Peb-Party Gigabit SFP Modules: Yuav Ua Li Cas Ua Tau Zoo
Ntawm no yog qhov uas peb tsis ua txuj ua tsis ncaj. Peb tsim tau tshaj SFP transceivers, yog li peb qhov kev xav tau muaj cov ntsiab lus tsim hauv. Tab sis qhov kev sib cav engineering tsis hloov raws li leej twg ua nws:SFP MSA tus qauvtxhais cov khoom siv hluav taws xob, kho qhov muag, thiab cov khoom siv hluav taws xob tag nrho. Ib qho qauv tsim los rau spec, nrog rau qhov programmed EEPROM kom raug, ua haujlwm zoo ib yam ntawm lub cev txheej. Kev kwv yees kev lag luam muab cov nqi txuag ntawm qhov thib peb - tog tau txais optics ntawm 30-70% piv rau OEM daim ntawv teev nqi, nyob ntawm qhov ntim thiab tus neeg muag khoom qib (Lub teeb).
Qhov kev pheej hmoo tsis yog optics. Nws yog EEPROM coding thiab tus tswv platform lub validation logic. Cisco hloov pauv cov neeg muag khoom OUI thiab CRC bytes, thiab cov tshev tshwj xeeb txawv ntawm IOS-XE version. Juniper's JUNOS ntawm qee yam EX-series tsim yuav ua rau cov kab txuas txuas nrog tsis yog- cov qauv tsim nyog. HPE Aruba nkoj nrog tso cai-tsis muaj kev txhawb nqa- transceiver raug kaw los ntawm lub neej ntawd. Kev hloov kho firmware ntawm ib qho ntawm cov platforms no tuaj yeem tsis lees txais cov qauv uas ua haujlwm nag hmo; peb tau muaj cov neeg siv khoom qhia meej qhov no tom qab Cisco IOS{10}}XE 17.9 hloov kho dua tshiab.
Yog li thaum koj tab tom ntsuam xyuas 1G fiber ntau tus neeg muag khoom rau kev txiav txim ntau, peb yam cais ib qho kev ntseeg tau los ntawm cov khoom lag luam.
Ua ntej, nug seb lawv puas ua haujlwm EEPROM rau lub hom phiaj platform lossis siv cov cai thoob ntiaj teb. Universal coding ua haujlwm ntawm qee qhov hloov pauv thiab ua tsis tau zoo rau lwm tus. Ib -platform coding tshem tawm qhov hloov pauv no.
Thib ob, thov cov qauv hloov tshwj xeeb thiab cov firmware versions lawv tau sim tawm tsam. "Tshaj nrog Cisco" yog kev lag luam; "kuaj ntawm C9200L khiav IOS-XE 17.12.2" yog engineering.
Thib peb, lees paub qhov kev lees paub npog DOA hloov nrog kev xa khoom ua ntej, tsis yog RMA kho nrog plaub lub lis piam hloov pauv, vim hais tias ib tug tuag module nyob rau hauv tej thaj chaw deb qhov chaw IDF yog ib lub tsheb yob, tsis yog ib tug shipping daim ntawv lo.
Ib qho ntxiv rau pawg neeg yuav khoom ua raws li kev mob siab rau: nug koj tus neeg muag khoom rau DDM screenshots los ntawm lawv cov kev xeem sib raug zoo, nrog rau tus hloov hostname thiab tus lej interface pom hauv cov zis. Txhua tus neeg tsim khoom ua qhov tseeb tiag muaj cov ntaub ntawv no. Yog tias lawv tsuas tuaj yeem qhia koj daim ntawv PDF spec, uas qhia koj qee yam. Ib qho kev tshawb fawb IEEE tsom xam loj -scale transceiver deployments paub tseeb tias thaum ntxov -theem DDM anomalies tuaj yeem kwv yees ua tsis tiav ua ntej lawv cuam tshuam rau kev tsheb (IEEE). Module zoo sib txawv tshwm sim hauv kev saib xyuas cov ntaub ntawv hauv thawj 90 hnub. Koj tsis tas yuav tos 18 lub hlis kom pom tias koj yuav los ntawm tus neeg muag khoom tsis raug.
DDM Kev Ncaj Ncees Tam sim no: Ib qho Metric uas qhia rau koj tias tus qauv yuav tuag
Txhua SFF-8472 raws li SFP tsim nyog siv kev txhawb nqaDigital Diagnostic Monitoring. Feem ntau cov engineers xyuas TX thiab RX fais fab thaum qhov txuas mus. Pab tau, tab sis reactive.
Lub metric uas muab kev ceeb toom rau koj ua ntej yog laser bias tam sim no. Raws li VCSEL lossis DFB laser muaj hnub nyoog, quantum efficiency degrades. Internal tswj voj compensates los ntawm kev tsav tsheb ntau tam sim no los tuav lub zog tso zis tsis tu ncua. TX lub hwj chim nyob twj ywm thaum tsis ncaj ncees tam sim no nce, thiab thaum lub sij hawm TX hwj chim thaum kawg poob qis dua qhov pib, lub laser yog hnub los ntawm tsis ua hauj lwm. Ntawm Cisco platform, qhia txog kev sib tham transceiver nthuav dav muab rau koj nyeem tam sim no. Peb teeb tsa SNMP qhov pib ntawm 80% ntawm cov chaw tsim khoom ntsuas qhov siab tshaj plaws tam sim no. Qhov ntawd muab lub qhov rais txij nkawm ntsuas hauv lub lis piam, txaus los txiav txim hloov thiab teem caij sib pauv thaum lub caij hloov pauv.
| Hom Module | Typical TX Power | RX Sensitivity |
|---|---|---|
| SX | -4 rau -9.5dBm | rau -17 dBm |
| LX | -3 rau -9.5dBm | rau -19 dBm |
| ZX | 0 rau +5 dBm | rau -23 dBm |
Cov lej no yuav tsum yog nyob rau hauv koj tus qauv saib xyuas.
Cov cai txiav txim siab tsis zoo peb siv sab hauv
Ntawm no yog shorthand peb pab neeg poob rov qab rau. Cov no tsis yog cov cai hlau, tab sis lawv tau tuav thoob plaws kev xa tawm txaus uas peb ntseeg lawv ua qhov pib lim.
Kev poob qis dua 6dB ntawm multimode: SX, tab sis paub meej tias qib fiber ntau nrog OTDR yog tias cov ntaub ntawv cog qoob loo muaj hnub nyoog tshaj 10 xyoo.
Kev poob qis 6-11dB ntawm ib hom: LX, xyuas kom tseeb tias koj muaj cov npoo tom qab ntxiv 0.5dB rau ib khub sib txuas.
Kev poob qis tshaj 11dB lossis ncua deb tshaj 10km: ZX, pob nyiaj siv rau LC / UPC tsau 10dB inline attenuators yog tias qhov poob qis tuaj yeem poob qis dua 8dB.
DDM kev tsis ncaj ncees tam sim no tshaj 80% ntawm qhov ntsuas max: teem caij hloov hloov pauv hauv 30 hnub.
Thiab ua ntej ib qho ntawm no: ntxuav txhua qhov txuas kawg - ntsej muag nrog ib qho - nyem huv. Cov kab mob sib kis ua rau muaj kev sib txuas ntau dua li cov khoom tsis zoo. Qhov ntawd tsis yog kev pom kev, nws tsuas yog qhov tshwm sim thaum koj daws teeb meem txaus fiber ntau txuas.
Yog tias koj qhov kev xa tawm cuam tshuam nrog kev sib xyaw ntawm - tus neeg muag khoom hloov pawg, tsis yog - hom fiber ntau, lossis qhov ntev ntawm qhov kev nyeem OTDR tsis phim cov ntaub ntawv tsim, cov no yog cov xwm txheej uas tau txais SFP kev sib raug zoo tsis raug yuav kim. Peb siv tau tawm tsam tshwj xeeb platform thiab firmware ua ke thiab tshaj tawm cov twg. Koj tuaj yeem xauj lubtag nrho ntawm FB -LINK 1000BASE SFP modulesnrog rau - cov ntaub ntawv sib raug ntawm lub platform, lossis hu rau peb pab pawg engineering ncaj qha yog tias koj qhov kev teeb tsa tsis phim tus qauv profile.
FAQ
Q: Kuv puas tuaj yeem siv 1000BASE-LX SFP ntawm multimode fiber ntau?
A: Yog lawm, nrog rau hom txias thaj qaum ntawm OM1 thiab OM2. Ntawm OM3, qhov yuav tsum tau hloov mus rau 5dB attenuator hloov MCP. Cov hom kev ua tsis tiav yog txawv rau txhua qib fiber ntau, thiab lawv hloov maj mam txaus uas peb tau mob siab rau tag nrho ntu saum toj no rau qhov lawv tau tshwm sim hauv kev hloov pauv.
Q: Kuv puas xav tau tus attenuator nrog 1000BASE-ZX ntawm qhov txuas luv?
A: Thaum span poob poob qis dua 8dB, qhov ruaj khov 10dB inline attenuator (LC/UPC, ib leeg-mode) ntawm qhov kawg tau txais kev tiv thaiv tsis txaus. ZX ntu saum toj no suav nrog kev ua lej lej thiab kev xa tawm qhov twg ZX daws qhov teeb meem LX tsis tuaj yeem, suav nrog kev ua raws li -txoj kev saib xyuas feem ntau hla.
Q: Puas yuav gigabit SFP ua haujlwm hauv SFP + chaw nres nkoj?
A: Ntawm cov platforms feem ntau qhov chaw nres nkoj sib tham mus rau 1G. Brocade ICX 6450 series SFP + qhov tsis lees txais 1G modules nkaus. Cisco C9300 uplink SFP+ ports txhawb 1G downshift ntawm IOS-XE 16.x thiab tom qab ntawd. Lwm lub platform sib txawv los ntawm firmware version, uas yog vim li cas peb sim txhua qhov sib xyaw ua ke tsis yog ua daim pam thov.
Q: Ntau npaum li cas peb - tog tau tshaj SFP modules txuag?
A: 30-70% piv rau OEM daim ntawv teev npe, tab sis tus nqi tsaws tiag tiag nyob ntawm seb koj xav tau los ntawm tus neeg muag khoom. Qhov sib txawv ntawm "Cisco tau tshaj" ntawm nplooj ntawv khoom thiab DDM screenshot qhia kev nyeem huv ntawm C9200L khiav IOS-XE 17.12 yog 15-point viav vias hauv qhov ntau. Cov ncauj lus kom ntxaws thiab kev ntsuam xyuas yog nyob rau hauv ntu kev yuav khoom saum toj no