ONU (Optical Network Unit) Chav tsev optical network, ONU muab faib ua chav tsev optical network thiab chav tsev passive optical network. Feem ntau, cov khoom siv uas muaj optical receivers, uplink optical transmitters, thiab ntau lub bridge amplifiers rau kev saib xyuas network hu ua optical node. PON siv ib lub fiber optical los txuas rau OLT, thiab tom qab ntawd OLT txuas rau ONU. ONU muab cov kev pabcuam xws li cov ntaub ntawv, IPTV (Interactive Internet TV), lub suab (siv IAD, Integrated Access Device), thiab ua tiav cov ntawv thov "triple-play".
Zuag qhia tag nrho, cov khoom siv ONU tuaj yeem raug faib ua pawg raws li ntau yam kev siv xws li SFU, HGU, SBU, MDU, thiab MTU.
1. Kev xa tawm SFU hom ONU
Qhov zoo 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 cov haujlwm nkag mus rau broadband, tab sis tsis koom nrog cov haujlwm hauv tsev gateway nyuaj. SFU hauv qhov chaw ib puag ncig no muaj ob daim ntawv sib xws: muab ob qho tib si Ethernet ports thiab POTS ports; thiab muab tsuas yog Ethernet ports. Nws yuav tsum tau sau tseg tias SFU hauv ob daim ntawv tuaj yeem muab cov haujlwm coaxial cable los pab txhawb kev paub txog CATV cov kev pabcuam, thiab kuj tuaj yeem siv nrog cov gateways hauv tsev los pab txhawb kev muab cov kev pabcuam ntxiv. Qhov xwm txheej no kuj siv tau rau cov lag luam uas tsis tas yuav pauv cov ntaub ntawv TDM.
2. HGU hom ONU xa mus
Lub tswv yim xa tawm ntawm HGU hom ONU davhlau ya nyob twg zoo ib yam li SFU hom, tsuas yog tias cov haujlwm ntawm ONU thiab RG tau koom ua ke hauv kho vajtse. Piv nrog SFU, nws tuaj yeem ua tiav cov haujlwm tswj hwm thiab kev tswj hwm nyuaj dua. Hauv qhov xwm txheej xa tawm no, U-puab interface tau tsim rau hauv lub cuab yeej lub cev thiab tsis muab interface. Yog tias xav tau cov khoom siv xDSLRG, ntau hom interfaces tuaj yeem txuas ncaj qha rau lub network hauv tsev, uas yog sib npaug rau lub rooj vag hauv tsev nrog EPON uplink interface. Siv rau FTTH cov xwm txheej.
3. Kev xa tawm SBU hom ONU
Qhov kev daws teeb meem no zoo dua rau kev tsim kho network ntawm cov neeg siv lag luam ywj pheej hauv FTTO daim ntawv thov hom, thiab nws yog kev hloov pauv lag luam raws li SFU thiab HGU cov xwm txheej xa tawm. Lub network nyob rau hauv qhov chaw xa tawm no tuaj yeem txhawb nqa broadband nkag mus rau lub davhlau ya nyob twg thiab muab rau cov neeg siv nrog ntau yam ntawm cov ntaub ntawv interfaces suav nrog El interface, Ethernet interface, thiab POTS interface, uas tuaj yeem ua tau raws li qhov xav tau ntawm cov lag luam hauv kev sib txuas lus cov ntaub ntawv, kev sib txuas lus suab, thiab TDM cov kev pabcuam kab ntiag tug. Cov kev cai siv. Lub U-puab interface hauv ib puag ncig tuaj yeem muab cov lag luam nrog cov qauv thav duab nrog ntau yam cwj pwm, thiab lub luag haujlwm muaj zog heev.
4. MDU hom ONU xa mus
Qhov kev daws teeb meem no yog tsim rau kev tsim kho network hauv ntau hom kev siv xws li ntau tus neeg siv FTTC, FTTN, FTTCab, thiab FTTZ. Yog tias cov neeg siv theem lag luam tsis xav tau cov kev pabcuam TDM, qhov kev daws teeb meem no kuj tseem siv tau rau kev xa tawm network EPON. Txoj kev npaj xa tawm no tuaj yeem muab cov kev pabcuam sib txuas lus broadband rau ntau tus neeg siv suav nrog Ethernet / IP cov kev pabcuam, VoIP cov kev pabcuam, thiab CATV cov kev pabcuam thiab lwm yam kev pabcuam ntau hom, thiab muaj peev xwm xa cov ntaub ntawv zoo. Txhua qhov chaw nres nkoj sib txuas lus tuaj yeem sib haum rau tus neeg siv network, yog li piv rau, nws cov nqi siv network siab dua.
5. MTU hom ONU xa mus
Qhov kev daws teeb meem no yog kev hloov pauv lag luam raws li kev daws teeb meem MDU. Nws tuaj yeem muab ntau yam kev pabcuam interface rau cov neeg siv ntau lub lag luam suav nrog 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 leased line services ntawm cov lag luam. Yog tias cov qauv kev siv hom slot siv ua ke, cov haujlwm lag luam nplua nuj thiab muaj zog dua tuaj yeem ua tiav.
Lub sijhawm tshaj tawm: Lub Xya Hli-20-2023