I-DOCSIS OVER PON (D-PON)
I-Docsis phezu kwesiphakamiso se-PON (D-PON) inikeza ikhambi le-CATV MSO ukuze inikeze izinsizakalo ze-HDTV+Ethernet kwababhalisile abangaba ngu-3000 FTTH emphakathini ongaphansi kwebanga elingu-10Km lefayibha ukuya ehhovisi elihamba phambili. Obhalisile ngamunye uzoba nokuqukethwe kwe-HDTV kwesiteshi esingu-60ch+ QAM kanye nekhono le-broadband elingu-50Mbps. I-RFoG micronode, CMTS kanye ne-CWDM yizinto ezisetshenziswa kakhulu kulesi siphakamiso.
I-SCTE yamemezela i-RF phezu kwe-Glass (RFoG) ejwayelekile ye-SCTE-174-2010 eminyakeni embalwa edlule, ichaza imodi yokuqhuma kwendlela yokubuya evumela imodemu yekhebula eyodwa kuphela ukuthumela idatha yokuhlehla ngentambo yefayibha ku-CMTS uma wonke amamodemu ekhebula asethwe kumodi ye-TDMA. Nge-RFoG, iCable MSO inganweba isevisi yeModemu ye-CMTS/Cable isuka kunethiwekhi ye-HFC iye ku-Fiber iye kunethiwekhi yasekhaya (FTTH). Lokhu okubizwa nge-DOCSIS phezu kwe-Passive Optical Network (D-PON). I-D-PON isekela i-1x32 optical splitter ebangeni le-fibre engu-20Km noma i-1x64 ye-optical splitter ebangeni le-fiber elingu-10Km.
Sethule futhi i-Docsis 3.0 mini-CMTS ngokusekelwe kuzinga le-C-DOCSIS. I-GmCMTS30 ineziteshi ezingu-16ch ezehlayo kanye namashaneli angu-4 akhuphukayo, asekela i-docsis 2.0 namamodemu ekhebula le-docsis 3.0. Ku-256QAM, iziteshi ze-DS eziyi-16 kungenzeka ukuthi zabelane ngomkhawulokudonsa ongu-800Mbps, okusho ukuthi kwababhalisile bemodemu yekhebula abangu-256, isivinini esihlanzekile se-Ethernet singaba ngu-50Mbps.
Ngenhlanganisela ephelele ye-CMTS ne-D-PON, i-Cable MSO inganikeza i-HDTV yokuncintisana nezinsizakalo ze-inthanethi ze-High Speed ngezindleko ezithengekayo. Njengoba i-fiber ekhaya, konke ukunakekelwa kwesistimu nokuthuthukiswa kuba lula kakhulu.
Ohlelweni lwe-Docsis 3.1 noma lwe-Docsis 4.0 olucela ukuboshelwa okwengeziwe kwesiteshi sokubuyisela kumkhawulokudonsa ophansi we-CATV, ukuphazamiseka kokushaywa kwe-optical beat (OBI) kuyisici esiyinselele kakhulu ohlelweni lwe-PON. Nge-laser yendlela yokubuya ye-CWDM eyakhelwe ngaphakathi engapholisiwe efasiteleni elikhethiwe lokubona, i-GFH2009 RFoG Micronode ibona ukufunwa kwamahhala kwe-OBI ngesabelomali esinomnotho, enezinzuzo zokusakaza amakhulukhulu we-HD TV kanye nokwabelana ngedatha ye-Ethernet ye-10Gbps.
Bheka umdwebo wenethiwekhi yesiphakamiso se-D-PON kanye nomdwebo wokuxhumeka kwemishini yesihloko se-D-PON.
