Iyunithi yenethiwekhi ye-Optical ye-ONU (iYunithi yeNethiwekhi ye-Optical) yenethiwekhi ye-Optical, i-ONU yahlulwe yaba yiyunithi yenethiwekhi ye-optical esebenzayo kunye neyunithi yenethiwekhi ye-optical engasebenziyo. Ngokubanzi, izixhobo ezixhotyiswe ngee-optical receivers, ii-uplink optical transmitters, kunye nee-bridge amplifier ezininzi zokujonga inethiwekhi zibizwa ngokuba yi-optical node. I-PON isebenzisa i-optical fiber enye ukuqhagamshela kwi-OLT, ize emva koko i-OLT iqhagamshelwe kwi-ONU. I-ONU ibonelela ngeenkonzo ezifana nedatha, i-IPTV (i-Interactive Internet TV), ilizwi (kusetyenziswa i-IAD, i-Integrated Access Device), kwaye ifezekisa ngokwenene usetyenziso "oludlalwa kathathu".
Ngokubanzi, izixhobo ze-ONU zinokuhlulwa ngokweemeko ezahlukeneyo zesicelo ezifana ne-SFU, i-HGU, i-SBU, i-MDU, kunye ne-MTU.
1. Ukusasazwa kwe-ONU yohlobo lwe-SFU
Inzuzo yale ndlela yokusasaza kukuba izixhobo zenethiwekhi zininzi kakhulu, kwaye zifanelekile kumakhaya azimeleyo kwimeko ye-FTTH. Inokuqinisekisa ukuba isiphelo somsebenzisi sinemisebenzi yokufikelela kwi-broadband, kodwa ayibandakanyi imisebenzi enzima yesango lasekhaya. I-SFU kule meko ineendlela ezimbini ezifanayo: ukubonelela ngamazibuko e-Ethernet kunye namazibuko e-POTS; kunye nokubonelela ngamazibuko e-Ethernet kuphela. Kufuneka kuqatshelwe ukuba i-SFU kuzo zombini ezi ndlela inokubonelela ngemisebenzi yekhebula le-coaxial ukwenza lula ukufezekiswa kweenkonzo ze-CATV, kwaye ingasetyenziswa namasango asekhaya ukwenza lula ukunikezelwa kweenkonzo ezongeziweyo. Le meko ikwasebenza nakumashishini angafuni kutshintshiselana ngedatha ye-TDM.
2. Ukusasazwa kwe-ONU yohlobo lwe-HGU
Icebo lokusasaza i-terminal ye-OHU yohlobo lwe-HGU lifana nelohlobo lwe-SFU, ngaphandle kokuba imisebenzi ye-ONU kunye ne-RG idityaniswe kwi-hardware. Xa kuthelekiswa ne-SFU, inokufezekisa imisebenzi enzima yokulawula kunye nolawulo. Kule meko yokusasaza, i-interface enomfanekiso we-U yakhelwe kwisixhobo esibonakalayo kwaye ayiboneleli nge-interface. Ukuba kufuneka izixhobo ze-xDSLRG, iintlobo ezininzi ze-interfaces zinokuqhagamshelwa ngqo kwinethiwekhi yasekhaya, elingana nesango lasekhaya eline-interface ye-EPON uplink. Isetyenziswa kwiimeko ze-FTTH.
3. Ukusasazwa kwe-ONU yohlobo lwe-SBU
Esi sisombululo sokusasazwa sifanelekile ngakumbi kulwakhiwo lwenethiwekhi yabasebenzisi beshishini abazimeleyo kwimo yesicelo se-FTTO, kwaye lutshintsho lweshishini olusekelwe kwiimeko zokusasazwa kwe-SFU kunye ne-HGU. Inethiwekhi phantsi kwale ndawo yokusasazwa inokuxhasa umsebenzi wesiphelo sokufikelela kwi-broadband kwaye inike abasebenzisi uluhlu lweendawo zokunxibelelana kwedatha eziquka i-El interface, i-Ethernet interface, kunye ne-POTS interface, ezinokuhlangabezana neemfuno zamashishini kunxibelelwano lwedatha, unxibelelwano lwelizwi, kunye neenkonzo zomgca wabucala we-TDM. Iimfuno zokusetyenziswa. I-interface enomfanekiso we-U kwindalo inokubonelela amashishini ngesakhiwo sesakhelo esineempawu ezahlukeneyo, kwaye umsebenzi unamandla kakhulu.
4. Ukusasazwa kwe-ONU yohlobo lwe-MDU
Esi sisombululo sokusasaza sifanelekile ekwakheni inethiwekhi phantsi kweendlela ezininzi zokusetyenziswa ezifana ne-FTTC yabasebenzisi abaninzi, i-FTTN, i-FTTCab, kunye ne-FTTZ. Ukuba abasebenzisi bezinga leshishini abazifuni iinkonzo ze-TDM, esi sisombululo sinokusetyenziselwa ukusasaza inethiwekhi ye-EPON. Esi sicwangciso sokusasaza sinokubonelela abasebenzisi abaninzi ngeenkonzo zonxibelelwano lwedatha ye-broadband kuquka iinkonzo ze-Ethernet/IP, iinkonzo ze-VoIP, kunye neenkonzo ze-CATV kunye nezinye iindlela ezininzi zokuhambisa idatha, kwaye zinamandla okudlulisa idatha. Izibuko ngalinye lonxibelelwano linokuhambelana nomsebenzisi wenethiwekhi, ngoko ke xa kuthelekiswa, izinga lokusetyenziswa kwenethiwekhi liphezulu.
5. Ukusasazwa kwe-ONU yohlobo lwe-MTU
Esi sisombululo sokusasazwa silutshintsho lwezorhwebo olusekelwe kwisisombululo sokusasazwa kwe-MDU. Singabonelela abasebenzisi bamashishini amaninzi ngeenkonzo ezahlukeneyo zojongano oluquka ii-interfaces ze-Ethernet kunye nee-interfaces ze-POTS, kwaye sinokuhlangabezana neenkonzo ezahlukeneyo ezifana nelizwi, idatha, kunye neenkonzo zomgca eziqeshisiweyo ze-TDM zamashishini. Ukuba isakhiwo sokusetyenziswa kohlobo lwe-slot sisetyenziswa ngokudibeneyo, imisebenzi yeshishini etyebileyo nenamandla ngakumbi inokufezekiswa.
Ixesha lokuthumela: Julayi-20-2023