ONU (Optical Network Unit) Optical network unit, ONU muab faib ua active optical network unit thiab passive optical network unit.Feem ntau, cov cuab yeej nruab nrog optical receivers, uplink optical transmitters, thiab ntau tus choj amplifiers rau kev saib xyuas network yog hu ua optical node.PON siv ib qho fiber ntau optical txuas rau OLT, thiab tom qab ntawd OLT txuas nrog ONU.ONU muab cov kev pabcuam xws li cov ntaub ntawv, IPTV (Kev Sib Tham Sib Tham Internet TV), lub suab (siv IAD, Integrated Access Device), thiab paub tiag tiag "triple-play" daim ntawv thov.
Zuag qhia tag nrho, ONU cov cuab yeej tuaj yeem raug cais raws li ntau yam kev thov xws li SFU, HGU, SBU, MDU, thiab MTU.
1. SFU hom ONU xa tawm
Qhov kom zoo dua ntawm txoj kev xa tawm no yog tias cov peev txheej hauv network muaj ntau heev, thiab nws tsim nyog rau cov tsev neeg ywj pheej hauv FTTH qhov xwm txheej.Nws tuaj yeem ua kom ntseeg tau tias tus neeg siv kawg muaj kev siv dav dav, tab sis tsis koom nrog kev ua haujlwm nyuaj hauv tsev.SFU nyob rau hauv ib puag ncig no muaj ob hom: muab ob qho tib si Ethernet ports thiab POTS chaw nres nkoj;thiab muab Ethernet ports nkaus xwb.Nws yuav tsum raug sau tseg tias SFU nyob rau hauv ob daim ntawv tuaj yeem muab cov coaxial cable ua haujlwm los pab txhawb kev ua tiav ntawm CATV cov kev pabcuam, thiab tseem tuaj yeem siv nrog lub rooj vag hauv tsev los pab txhawb kev muab cov kev pabcuam muaj nqis ntxiv.Qhov xwm txheej no tseem siv tau rau cov lag luam uas tsis tas yuav pauv cov ntaub ntawv TDM
2. HGU hom ONU xa tawm
Lub tswv yim xa tawm ntawm HGU hom ONU davhlau ya nyob twg zoo ib yam li ntawm SFU hom, tshwj tsis yog tias cov haujlwm ntawm ONU thiab RG tau koom ua ke hauv cov khoom siv.Piv nrog SFU, nws tuaj yeem paub ntau txoj kev tswj hwm thiab kev tswj hwm txoj haujlwm.Hauv qhov kev xa tawm no, U-shaped interface yog tsim rau hauv lub cev thiab tsis muaj qhov cuam tshuam.Yog tias xav tau cov khoom siv xDSLRG, ntau hom kev sib txuas tuaj yeem txuas ncaj qha rau hauv tsev network, uas yog sib npaug rau lub rooj vag hauv tsev nrog EPON uplink interface.Siv rau FTTH lub sijhawm.
3. SBU hom ONU xa tawm
Qhov kev xa tawm no yog qhov tsim nyog rau kev tsim kho network ntawm cov neeg siv kev lag luam ywj pheej hauv FTTO daim ntawv thov hom, thiab nws yog kev hloov pauv kev lag luam raws li SFU thiab HGU xa tawm scenarios.Lub network nyob rau hauv qhov chaw xa tawm no tuaj yeem txhawb nqa lub dav hlau nkag mus rau lub davhlau ya nyob twg thiab muab cov neeg siv ntau yam ntaub ntawv cuam tshuam nrog rau El interface, Ethernet interface, thiab POTS interface, uas tuaj yeem ua tau raws li cov kev xav tau ntawm cov lag luam hauv cov ntaub ntawv sib txuas lus, kev sib txuas lus, thiab TDM ntiag tug. kab kev pabcuam.Cov kev cai siv.U-shaped interface nyob rau hauv ib puag ncig tuaj yeem muab kev lag luam nrog cov qauv thav duab nrog ntau yam cwj pwm, thiab kev ua haujlwm muaj zog heev.
4. MDU hom ONU xa tawm
Qhov kev daws teeb meem no tsim nyog rau kev tsim kho hauv network hauv ntau hom kev thov xws li ntau tus neeg siv FTTC, FTTN, FTTCab, thiab FTTZ.Yog tias cov neeg siv khoom lag luam tsis xav tau cov kev pabcuam TDM, cov tshuaj no kuj tuaj yeem siv rau EPON network xa tawm.Txoj kev xa tawm no tuaj yeem muab ntau tus neeg siv nrog kev pabcuam kev sib txuas lus dav dav suav nrog Ethernet / IP cov kev pabcuam, VoIP cov kev pabcuam, thiab CATV cov kev pabcuam thiab lwm yam kev pabcuam ntau yam, thiab muaj peev xwm xa cov ntaub ntawv muaj zog.Txhua qhov ntawm nws cov chaw sib txuas lus tuaj yeem sib haum rau tus neeg siv lub network, yog li hauv kev sib piv, nws qhov kev siv network yog siab dua.
5. MTU hom ONU xa tawm
Qhov kev daws teeb meem no yog kev hloov pauv lag luam raws li MDU kev xa tawm daws teeb meem.Nws tuaj yeem muab ntau tus neeg siv khoom lag luam nrog ntau yam kev pabcuam cuam tshuam nrog rau Ethernet interfaces thiab POTS interfaces, thiab tuaj yeem ua tau raws li ntau yam kev pabcuam xws li lub suab, cov ntaub ntawv, thiab TDM cov kev pabcuam ntawm cov tuam txhab.xav tau.Yog tias qhov kev siv hom kev siv cov qauv siv hauv kev sib xyaw ua ke, kev ua lag luam muaj zog dua thiab muaj zog dua tuaj yeem ua tiav.
Post lub sij hawm: Lub Xya hli ntuj-20-2023