GPON SFP tsis yog tus qauv fiber ntau transceiver nrog cov ntawv sib txawv. Nws yog qhov kho qhov muag module tsim tshwj xeeb rau Gigabit Passive Optical Network systems, qhov twg OLT ntawm tus neeg muab kev pabcuam sib txuas lus nrog ntau ONUs lossis ONTs dhau ntawm kev sib koom fiber ntau los ntawm kev sib cais. Yog tias koj tab tom sib piv GPON optical modules rau FTTH rollout, hloov kho qhov muag nyob rau hauv ib qho sib xyaw- tus neeg muag khoom network, lossis sim nkag siab tias vim li cas koj OLT tsis lees txais ib qho SFP, qhov tseem ceeb yog lub luag haujlwm hauv network, chav kawm kho qhov muag, lub hom phiaj wavelength, thiab platform compatibility.
GPON SFP yog dab tsi?
GPON SFP yog ib daim ntawv me me-factor pluggable transceiver tsim los ua haujlwm nyob rau hauv GPON nkag network tswj hwm los ntawmITU-T G.984 txheem series. Nws converts hluav taws xob signals los ntawm tus tswv tsev ntaus ntawv mus rau hauv optical signals nqa mustib - hom fiber ntau, thiab vice versa.
GPON tes hauj lwm pab ntau yam kev siv fiber ntau, suav nrog FTTH (fiber rau hauv tsev), FTTB (fiber rau lub tsev), FTTC (fiber rau qhov curb), thiab tsev kawm ntawv passive optical LAN xa tawm. Nyob rau hauv txhua rooj plaub, lub architecture ua raws li ib tug point - mus rau -multipoint qauv es tsis yog ib tug yooj yim point- mus rau - taw tes Ethernet txuas. Yog xav paub ntxiv txog yuav ua li cas cov tes hauj lwm no tau teeb tsa, saib peb phau ntawv qhiaYuav ua li cas los tsim FTTH network.
Ib qho kev ua haujlwm GPON muaj peb lub ntsiab lus tseem ceeb: OLT (Optical Line Terminal) ntawm lub chaw muab kev pabcuam hauv nruab nrab, ib lossis ntau duapassive optical splittersnyob rau hauv lub network faib, thiab ONU (Optical Network Unit) lossis ONT (Optical Network Terminal) ntawm txhua qhov chaw nyob. SFP module ntsia hauv OLT yog qhov sib txawv ntawm qhov nruab rau hauv ONU, uas yog vim li cas xaiv qhov zoo module pib nrog kev nkag siab txog lub luag haujlwm nws yuav tsum tau sau.
GPON Transmission ua haujlwm li cas
Hauv GPON system, ib qho chaw nres nkoj OLT ua haujlwm rau ntau tus neeg siv khoom ib zaug. OLT xa cov ntaub ntawv nqes hav ntawm 2.488 Gbps, uas ib qho passive splitter faib rau txhua qhov txuas nrog ONUs. Txhua ONU tom qab ntawd xa cov tsheb thauj mus los ntawm 1.244 Gbps rov qab mus rau OLT, sib koom ua ke dhau sijhawm - faib ntau yam nkag (TDMA) kom tsis txhob muaj teeb meem sib tsoo.
Qhov kev sib txuas lus bidirectional no tshwm sim dhau ib leeg fiber ntau siv wavelength - faib multiplexing: 1490 nm nqa cov teeb liab nqes los ntawm OLT rau ONU, thaum 1310 nm nqa cov teeb liab ntawm ONU mus rau OLT. Cov haujlwm wavelength no tau txhais hauvCisco's GPON SFP cov ntaub ntawvthiab ua raws li ITU-T G.984.2 lub cev txheej txheem specification.
Vim hais tias cov teeb liab kho qhov muag yuav tsum muaj sia nyob sib cais hla 32 lossis 64 txoj hauv kev thiab taug kev mus txog 20 km, GPON SFP modules tau tsim nrog lub zog xa hluav taws xob nruj dua, txais kev nkag siab zoo, thiab cov peev txheej kho qhov muag tau tshaj li tus qauv Ethernet transceivers. Qhov no yog lub hauv paus vim li cas GPON SFP tsis tuaj yeem hloov pauv rau BiDi SFP module tsis tu ncua.
GPON OLT SFP vs GPON ONU / ONT SFP
GPON SFP modules faib ua ob pawg sib txawv raws li sab ntawm lub network lawv ua haujlwm. Tau txais qhov tsis ncaj ncees lawm yog qhov kev txiav txim ntau tshaj plaws hauv GPON xa tawm.
GPON OLT SFP
Nruab nyob rau hauv tus muab kev pabcuam- sab OLT chassis, qhov module no xa mus rau hauv qab ntawm 1490 nm thiab tau txais cov dej ntws ntawm 1310 nm. Nws yuav tsum ua haujlwm tawg - hom txais tos los ntawm ntau ONUs ntawm qhov sib txawv thiab qib zog. OLT SFPs feem ntau siv DFB (Distributed Feedback) laser rau kev sib kis thiab APD (Avalanche Photodiode) lossis PIN photodiode rau kev txais tos, nyob ntawm chav kawm kho qhov muag.
GPON ONU/ONT SFP
Nruab ntawm tus neeg siv khoom sab nraud, qhov qauv no ua qhov thim rov qab: nws tau txais 1490 nm downstream teeb liab los ntawm OLT thiab xa mus rau sab saud ntawm 1310 nm. ONU- sab modules yooj yim dua nyob rau hauv tawg- hom tuav vim hais tias lawv tsuas yog sib txuas lus nrog ib tug OLT, tab sis lawv yuav tsum tseem ua tau raws li lub optical zog thiab rhiab heev yuav tsum tau ntawm cov chav kawm deployed.
Vim Li Cas Lawv Tsis Hloov Pauv
Txawm hais tias ob qho tib si modules tuaj yeem sib koom tib yam SFP daim ntawv thiab SC connector, lawv ua haujlwm nyob rau hauv cov lus qhia kev kho qhov muag thiab ua haujlwm sib txawv raws tu qauv hauv GPON system. Hauv ISP- tswj kev xa tawm, OLT modules nquag xav tau tus neeg muag khoom- tshwj xeeb EEPROM coding, thaum ONU modules yuav raug txwv tsis pub teev npe dawb hauv OLT firmware. Kev sib pauv ib qho rau lwm qhov yuav tsis ua haujlwm, thiab tuaj yeem tiv thaiv OLT los ntawm kev lees paub lub module tag nrho.
| Parameter | GPON OLT SFP | GPON ONU/ONT SFP |
|---|---|---|
| Qhov chaw teeb tsa | Central chaw ua hauj lwm / chaw muab kev pab OLT | Cov neeg siv khoom thaj chaw ONU lossis ONT |
| Tx wavelength | 1490 nm (kwv yees) | 1310 nm (ntev) |
| Rx wavelength | 1310 nm (ntev) | 1490 nm (kwv yees) |
| Tus nqi qis | 2.488gbps ua | 2.488gbps ua |
| Upstream tus nqi | 1.244 Gbps ib | 1.244 Gbps ib |
| Burst- hom kev tuav | Tau txais tawg los ntawm ntau ONUs | Xa mus rau hauv TDMA qhov chaw |
| Tus neeg muag khoom coding | Feem ntau xav tau rau OLT platform | Tej zaum yuav raug rau OLT whitelist |
Chav B + vs. Chav C + GPON SFP: Qhov Chaw Kho Qhov Muag Koj Xav Tau?
Cov chav kawm kho qhov muag txiav txim siab ntau npaum li cas cov teeb liab poob qhov txuas tuaj yeem zam ntawm OLT thiab ONU. Hauv GPON, Chav B + thiab Chav C + yog ob chav kawm feem ntau siv, ob qho tib si txhais raws li ITU-T G.984.2.
Cov tswv yim sib txawv los mus rau kis lub zog thiab txais rhiab heev. A Class B + module muab kev siv nyiaj kho qhov muag ntawm kwv yees li 28 dB. Ib chav C + module txuas ntxiv mus rau kwv yees li 32 dB. Qhov ntxiv 4 dB ntawm cov npoo yog qhov tseem ceeb: nws tuaj yeem txhais tau tias qhov sib txawv ntawm kev ntseeg siab ua haujlwm ntawm 1: 32 sib cais thiab txhawb nqa 1: 64 sib cais, lossis nruab nrab ntawm ncav cuag 15 km thiab ncav cuag 20 km nyob rau hauv kev poob siab dua.
Kom nkag siab tias cov kev poob no ntxiv li cas hauv lub network tiag tiag, nws pab kom paub yuav ua li caskev poob qis hauv fiber ntauaccumulates hla splitters, connectors, thiab cable khiav.
| Parameter | Chav B + | Chav Kawm C+ |
|---|---|---|
| Optical pob nyiaj siv | ~ 28 dB | ~ 32 dB |
| OLT Tx power (typical) | +1.5 rau +5 dBm | +3 rau +7 dBm |
| OLT Rx rhiab heev | -28 dBm | -32 dBm |
| Hom cais piv tau txaus siab | 1:32 | 1:64 lossis ncua 1:32 |
| Hom max ncav cuag | 20 km (tus qauv ODN) | 20 km (siab dua -poob ODN) |
| Common use case | Nroog FTTH, luv rau nruab nrab -ntau | FTTH nyob deb nroog, siab -split, ntev- ncav cuag |
Tus nqi yog tus sawv cev ntawm cov neeg muag khoom siv raws li ITU-T G.984.2 Annex A. Cov tsis muaj tseeb txawv ntawm cov chaw tsim khoom. Qhov chaw:Cisco GPON SFP Daim Ntawv Teev Npe.
Thaum twg los xaiv Class B+
Chav B + yog tus qauv kev xaiv rau feem ntau GPON xa tawm. Yog tias koj tus qauv ODN siv qhov sib piv 1: 32 nrog qhov nruab nrab ntawm cov fiber ntau (hauv qab 15 km) thiab cov khoom sib txuas thiab cov splice poob, B + yuav npog cov nyiaj txuas txuas tau yooj yim thiab tus nqi qis dua rau ib qho module.
Thaum xaiv Class C+
Xaiv Chav C + thaum lub network xav tau qhov sib faib 1: 64, thaum fiber ntau khiav tshaj 15 km nrog cov khoom sib txuas siab thiab cov khoom sib txuas tsis zoo, lossis thaum tus neeg teb xov tooj txoj cai engineering tswj hwm cov paj laum ntxiv. Hauv kev xa tawm FTTH nyob deb nroog qhov twg ib qho chaw OLT nkaus xwb yuav tsum them cov neeg siv khoom sib cais thoob plaws qhov ntev, C + feem ntau yog qhov kev qhia tshwj xeeb.
Xaiv C + thaum lub network tsis xav tau nws ntxiv tus nqi yam tsis muaj txiaj ntsig. Hloov pauv, xa B + mus rau qhov siab - poob ODN tuaj yeem ua rau cov kev sib txuas tsis zoo lossis ua tsis tiav uas kim los daws teeb meem. Qhov kev xaiv zoo ib txwm pib los ntawm kev sib txuas ntawm kev suav nyiaj txiag, tsis yog los ntawm kev nyiam dav dav rau cov ntsiab lus siab dua.
GPON SFP vs Conventional BiDi SFP
Ntau tus engineers uas ua haujlwm feem ntau nrog kev hloov Ethernet nug seb GPON SFP puas tuaj yeem hloov tus qauvBiDi transceiverlos yog vice versa. Cov lus teb luv luv yog tsis yog, thiab ntawm no yog vim li cas.
Ib qho piv txwv BiDi SFP yog tsim los rau taw tes - rau - taw tes Ethernet txuas. Nws ua ke nrog ib qho piv txwv ntawm lwm qhov kawg thiab nqa cov qauv Ethernet thav duab. GPON SFP ua haujlwm nyob rau hauv ib qho chaw - mus rau -multipoint access architecture qhov twg ib qho chaw nres nkoj OLT sib txuas lus nrog ntau ntau ONUs los ntawm passive splitters, siv GPON encapsulation (GEM framing) es tsis yog haiv neeg Ethernet. OLT- sab module yuav tsum txhawb kev tawg- hom txais tos, TDMA lub sijhawm, thiab lub zog theem thoob plaws ONUs ntawm qhov sib txawv - tsis muaj ib qho twg uas tus qauv BiDi SFP tau tsim los daws.
Lub cev connector compatibility tsis txhais hais tias raws tu qauv compatibility. Ntxig lub generic BiDi SFP rau hauv OLT PON chaw nres nkoj yuav tsis tsim ib qhov txuas GPON, thiab GPON SFP muab tso rau hauv tus qauv Ethernet hloov chaw nres nkoj yuav tsis ua haujlwm li Ethernet transceiver. Rau kev sib piv dav dav ntawm SFP module hom thiab yuav ua li cas kom phim lawv rau cov luag haujlwm sib txawv, saib peb phau ntawv qhia ntawmSFP vs SFP +.
Qhov twg GPON SFP Modules raug xa tawm
GPON SFP modules tau siv txhua qhov chaw GPON-raws li kev nkag mus rau network xa cov kev pabcuam broadband hla fiber ntau. Cov xwm txheej feem ntau xa tawm muaj xws li:
ISP FTTH rollouts.Qhov loj tshaj plaws ntim siv rooj plaub. Ib cheeb tsam ISP los yog lub teb chaws tus neeg nqa khoom nruab OLT cov cuab yeej hauv lub chaw ua haujlwm hauv nruab nrab, khiav ib zaug - hom fiber ntau los ntawm kev siv lub network nrog PLC splitters ntawm cov ntsiab lus faib, thiab txiav tawm kev pabcuam ntawm ONTs cov neeg siv khoom. OLT- sab GPON SFPs yog yuav ntau thiab yuav tsum ua raws li tus neeg nqa khoom lub OLT platform coding cov cai.
MDU thiab chav tsev broadband.Hauv ntau-chaw nyob hauv tsev, ib qho chaw nres nkoj OLT nrog 1:32 splitter tuaj yeem ua haujlwm rau tag nrho lub tsev tsev. Chav kawm B + feem ntau txaus nyob ntawm no vim tias qhov kev ncua deb ntawm fiber ntau yog luv thiab cov splice suav tsawg.
Tsev kawm ntawv thiab kev lag luam passive optical LAN.Qee lub tuam txhab thiab cov tsev kawm qib siab hloov cov tooj liab ib txwm siv -raws li LAN infrastructure nrog GPON-raws li passive optical LANs. Hauv cov kev xa tawm no, OLT zaum hauv chav sib txuas lus tseem ceeb, thiab ONTs hloov cov keyboards ntawm txhua pem teb lossis ib cheeb tsam.
Nyob deb nroog thiab ib nrab- nroog FTTH.Ntev fiber ntau khiav thiab ntau dua qhov sib faib nyob rau hauv cov cheeb tsam nyob deb nroog feem ntau xav tau Class C + OLT modules. Cov tes hauj lwm no tuaj yeem pab cov neeg siv khoom sib kis thoob plaws ob peb mais ntawm qhov ze tshaj plaws splitter txee.
Yuav Ua Li Cas Xaiv Txoj Cai GPON SFP: Daim Ntawv Teev Npe Ua Haujlwm
Xaiv GPON optical module yuav tsum ua raws li kev txiav txim siab meej. Hla ib kauj ruam txaus ntshai xaj ib qho module uas haum rau qhov chaw nres nkoj tab sis tsis ua haujlwm hauv lub network.
Kauj ruam 1: Paub meej lub luag hauj lwm Network
Txiav txim seb lub module yog rau sab OLT lossis ONU / ONT sab. Qhov no yog thawj thiab tseem ceeb tshaj plaws lim. Yog tias koj tab tom hloov kho qhov muag hauv lub chaw muab kev pabcuam - muaj OLT chassis, koj xav tau OLT SFP. Yog tias koj tab tom muab cov neeg siv khoom siv - sab, koj xav tau ONU / ONT module.
Kauj Ruam 2: Tshawb xyuas Cov Chav Kawm Optical Xav Tau
Xa mus rau qhov txuas kev suav nyiaj txiag rau koj ODN. Ntxiv qhov poob ntawm fiber ntau attenuation (feem ntau 0.35 dB / km ntawm 1310 nm), splitter insertion poob, connector poob, thiab splice poob. Yog tias tag nrho poob hauv 28 dB, Chav B + txaus. Yog hais tias nws mus los yog siab tshaj 28 dB, qhia rau Class C +. Rau ib tug tswv yim walkthrough ntawm no xam,APNIC phau ntawv qhia rau GPON fais fab kev suav nyiaj txiagmuab cov ntaub ntawv siv tau zoo.
Kauj Ruam 3: Txheeb xyuas Wavelength thiab cov ntaub ntawv tus nqi
Tus qauv GPON siv 1490 nm nqes hav thiab 1310 nm sab saud, nrog 2.488 Gbps nqes hav thiab 1.244 Gbps ntws. Paub meej tias cov no phim cov kev xav tau ntawm qhov system. Qee tus neeg ua haujlwm tau tsiv mus rau XGS-PON (10G symmetric), uas siv cov wavelength sib txawv kiag li.
Kauj ruam 4: Paub meej tias Platform Compatibility
Qhov no yog qhov uas ntau qhov kev txiav txim mus yuam kev. Cov neeg muag khoom loj OLT suav nrog Huawei, ZTE, Nokia, thiab Calix feem ntau siv firmware- qib module validation. OLT tuaj yeem tsis lees txais SFP uas ua tau raws li txhua yam kev kho qhov muag tab sis tsis muaj tus neeg muag khoom raug cai hauv nws EEPROM. Ua ntej kev yuav khoom, paub meej tias tus neeg muag khoom module tuaj yeem muab coding sib phim rau koj tus qauv OLT tshwj xeeb thiab firmware version.
Kauj Ruam 5: Tshawb xyuas cov khoom txuas thiab cov kev xav tau ib puag ncig
Feem ntau GPON OLT SFPs siv SC / UPC (xiav) txuas interface. Tsis txhob siv SC/APC (ntsuab) connectors nyob rau hauv ib qhov chaw nres nkoj tsim rau SC/UPC - lub kaum sab xis polish tsim ib tug huab cua sib txawv uas ua rau kom rov qab poob thiab yuav ua rau lub laser puas. Tsis tas li paub meej tias qhov ntsuas qhov ntsuas kub ntawm qhov ntsuas qhov ntsuas qhov sib txawv ntawm qhov chaw teeb tsa. Cov cuab yeej siv hauv nruab nrab feem ntau xav tau 0℃txog 70℃kev lag luam ntau, tab sis sab nraum zoov lossis tsis muaj kev tswj hwm cov ntaub ntawv yuav xav tau kev lag luam- cov qauv ntsuas. Yog xav paub ntxivfiber optic connector homthiab yuav ua li cas kom phim lawv, saib peb cov lus qhia txuas.
Cov lus nug nquag
GPON SFP puas tuaj yeem ua haujlwm hauv ib qho Ethernet SFP Port?
Tsis yog GPON SFP yog tsim los rau GPON OLT lossis ONU cov chaw nres nkoj uas khiav GPON raws tu qauv pawg (GEM framing, TDMA, dynamic bandwidth faib). Ntxig nws mus rau hauv tus qauv Ethernet hloov chaw nres nkoj yuav tsis tsim qhov txuas ua haujlwm. Cov txheej txheem, lub sij hawm mechanisms, thiab encapsulation yog txawv kiag li.
Puas yog OLT thiab ONU GPON SFP Modules Hloov pauv tau?
Lawv tsis yog. OLT thiab ONU modules ua haujlwm ntawm qhov sib txawv wavelength cov lus qhia thiab ua haujlwm sib txawv raws tu qauv. OLT SFP kis ntawm 1490 nm thiab tau txais ntawm 1310 nm; ONU SFP ua qhov thim rov qab. Tshaj qhov wavelength, OLT module ua haujlwm tawg - hom txais tos los ntawm ntau ONUs, uas ONU module tsis tau tsim los ua.
Koj Yuav Tsum Saib Xyuas Dab Tsi Ua Ntej Yuav GPON SFP?
Pib nrog tsib -cov kauj ruam kos npe saum toj no: lub luag haujlwm hauv network (OLT lossis ONU), chav kawm kho qhov muag (B+ lossis C+ raws li kev sib txuas pob nyiaj), wavelength thiab cov ntaub ntawv tus nqi, platform compatibility (tus neeg muag khoom coding), thiab hom connector ntxiv rau ib puag ncig yuav tsum tau ua. Kev sib raug zoo nrog koj tus qauv OLT tshwj xeeb thiab firmware feem ntau yog qhov tsis pom zoo tshaj plaws.
Puas yog Chav Kawm C + OLT Module Ua Haujlwm nrog Chav B + ONUs?
Feem ntau, yog. GPON yog tsim los kom ntau dua -chav kawm OLT module tuaj yeem ua haujlwm nrog qis dua -chav kawm ONUs ntev npaum li lub hwj chim kho qhov muag ntawm ONU txais tau poob rau hauv nws qhov kev lees paub. Txawm li cas los xij, yog tias ONU nyob ze rau OLT (hauv qab 500 meters), lub teeb liab C + muaj zog tuaj yeem ua rau ONU txais. Hauv qhov xwm txheej ntawd, yuav xav tau ib qho inline optical attenuator.
Yuav ua li cas yog tias koj xaiv qhov Optical Class tsis ncaj ncees lawm?
Yog hais tias lub module cov nyiaj siv kho qhov muag tsawg dhau rau qhov txuas, cov neeg siv ntawm qhov kawg ntawm ODN yuav muaj kev sib txuas tsis tu ncua, tus nqi siab me ntsis, lossis ua tiav cov teeb liab poob. Yog tias cov peev nyiaj siab dhau rau qhov luv luv - kev xa mus deb yam tsis muaj kev cuam tshuam, tus txais yuav saturate, ua rau muaj qhov yuam kev zoo sib xws. Nyob rau hauv ob qho tib si, qhov teeb meem feem ntau tshwm sim raws li random ONU kev tso tawm uas nyuaj rau kev kuaj mob yam tsis tau kuaj xyuas qib kho qhov muag ntawm DDM.
Xaus
GPON SFP yog lub luag hauj lwm - tshwj xeeb kho qhov muag transceiver uas yog nyob rau hauv GPON nkag architecture - tsis yog ib tug generic fiber module koj tuaj yeem poob rau hauv ib qho chaw SFP. Xaiv qhov yog ib qho txhais tau tias pib ntawm lub network cov kev xav tau tiag tiag: OLT vs. ONU lub luag haujlwm, Chav B + vs. C + raws li kev sib txuas tiag tiag ntawm kev suav nyiaj txiag, txheeb xyuas lub platform kev sib raug zoo, thiab kev sib txuas kom raug. Hla ib qho ntawm cov kauj ruam no, thiab koj pheej hmoo xaj ib qho module uas zoo li tab sis ua tsis tiav hauv daim teb.
Yog xav paub ntxiv txog cov ncauj lus ntsig txog, tshawb xyuas peb cov lus qhia ntawmib -mode vs. multimode SFPthiabtransceiver vs. transponder sib txawv.
