I-ONU (Iyunithi Yenethiwekhi Yokukhanya) Iyunithi yenethiwekhi yokukhanya, i-ONU ihlukaniswe yaba iyunithi yenethiwekhi yokukhanya esebenzayo kanye neyunithi yenethiwekhi yokukhanya engasebenzi. Ngokuvamile, imishini efakwe ama-receiver optical, ama-uplink optical transmitters, kanye nama-bridge amplifier amaningi okuqapha inethiwekhi ibizwa ngokuthi i-optical node. I-PON isebenzisa i-fiber eyodwa yokukhanya ukuxhuma ku-OLT, bese i-OLT ixhunywe ku-ONU. I-ONU inikeza izinsizakalo ezifana nedatha, i-IPTV (i-Interactive Internet TV), izwi (kusetshenziswa i-IAD, i-Integrated Access Device), futhi ifezekisa ngempela izinhlelo zokusebenza "ezidlala kathathu".
Sekukonke, amadivayisi e-ONU angahlukaniswa ngokwezimo ezahlukahlukene zohlelo lokusebenza njenge-SFU, HGU, SBU, MDU, kanye ne-MTU.
1. Ukufakwa kwe-ONU yohlobo lwe-SFU
Inzuzo yale ndlela yokusabalalisa ukuthi izinsiza zenethiwekhi ziningi kakhulu, futhi zifanele imindeni ezimele esimweni se-FTTH. Ingaqinisekisa ukuthi umsebenzisi unemisebenzi yokufinyelela i-broadband, kodwa ayibandakanyi imisebenzi eyinkimbinkimbi yesango lasekhaya. I-SFU kule ndawo inezinhlobo ezimbili ezivamile: ukuhlinzeka ngamachweba e-Ethernet namachweba e-POTS; kanye nokuhlinzeka ngamachweba e-Ethernet kuphela. Kufanele kuqashelwe ukuthi i-SFU kuzo zombili izinhlobo ingahlinzeka ngemisebenzi yekhebula le-coaxial ukuze kube lula ukufezwa kwezinsizakalo ze-CATV, futhi ingasetshenziswa namasango asekhaya ukuze kube lula ukuhlinzekwa kwezinsizakalo ezengeziwe. Lesi simo siyasebenza nakumabhizinisi angadingi ukushintshanisa idatha ye-TDM.
2. Ukufakwa kwe-ONU yohlobo lwe-HGU
Isu lokusebenzisa i-terminal ye-OHU yohlobo lwe-HGU lifana nelohlobo lwe-SFU, ngaphandle kokuthi imisebenzi ye-ONU ne-RG ihlanganiswe kuhadiwe. Uma iqhathaniswa ne-SFU, ingafeza imisebenzi yokulawula nokuphatha eyinkimbinkimbi kakhulu. Kulesi simo sokusebenzisa, i-interface enomumo we-U yakhelwe kudivayisi ebonakalayo futhi ayinikezi i-interface. Uma kudingeka imishini ye-xDSLRG, izinhlobo eziningi ze-interface zingaxhunywa ngqo kunethiwekhi yasekhaya, okulingana nesango lasekhaya eline-interface ye-EPON uplink. Isetshenziswa emicimbini ye-FTTH.
3. Ukufakwa kwe-ONU yohlobo lwe-SBU
Lesi sixazululo sokufakwa sifaneleka kakhulu ekwakhiweni kwenethiwekhi yabasebenzisi bebhizinisi abazimele kwimodi yohlelo lokusebenza lwe-FTTO, futhi luwushintsho lwebhizinisi olusekelwe ezimweni zokufakwa kwe-SFU kanye ne-HGU. Inethiwekhi ngaphansi kwalesi simo sokufakwa ingasekela umsebenzi we-terminal yokufinyelela kwe-broadband futhi inikeze abasebenzisi izixhumi zedatha ezahlukahlukene okuhlanganisa isixhumi se-El, isixhumi se-Ethernet, kanye nesixhumi se-POTS, esingahlangabezana nezidingo zamabhizinisi ekuxhumaneni kwedatha, ukuxhumana ngezwi, kanye nezinsizakalo zomugqa wangasese we-TDM. Izidingo zokusetshenziswa. Isixhumi esinomumo we-U endaweni singanikeza amabhizinisi isakhiwo sohlaka esinezimfanelo ezahlukahlukene, futhi umsebenzi unamandla kakhulu.
4. Ukufakwa kwe-ONU yohlobo lwe-MDU
Lesi sixazululo sokusabalalisa sifanele ukwakhiwa kwenethiwekhi ngaphansi kwamamodi ezinhlelo zokusebenza eziningi njenge-FTTC yabasebenzisi abaningi, i-FTTN, i-FTTCab, kanye ne-FTTZ. Uma abasebenzisi bezinga lebhizinisi bengadingi izinsizakalo ze-TDM, lesi sixazululo singasetshenziswa futhi ekusetshenzisweni kwenethiwekhi ye-EPON. Lolu hlelo lokusabalalisa lunganikeza abasebenzisi abaningi izinsizakalo zokuxhumana kwedatha ye-broadband okuhlanganisa izinsizakalo ze-Ethernet/IP, izinsizakalo ze-VoIP, kanye nezinsizakalo ze-CATV kanye nezinye izindlela zezinsizakalo eziningi, futhi lunamandla okudlulisa idatha aqinile. Izimbobo zayo zokuxhumana zingalingana nomsebenzisi wenethiwekhi, ngakho-ke uma kuqhathaniswa, izinga lokusetshenziswa kwenethiwekhi liphakeme.
5. Ukufakwa kwe-ONU yohlobo lwe-MTU
Lesi sixazululo sokufakwa siwushintsho lwezentengiselwano olusekelwe kwisisombululo sokufakwa kwe-MDU. Singahlinzeka abasebenzisi bamabhizinisi amaningi ngezinsizakalo ezahlukahlukene zesikhombimsebenzisi okuhlanganisa izikhombimsebenzisi ze-Ethernet kanye nezikhombimsebenzisi ze-POTS, futhi singahlangabezana nezinsizakalo ezahlukahlukene njengezwi, idatha, kanye nezinsizakalo zomugqa oqashiwe we-TDM zamabhizinisi. Uma isakhiwo sokusetshenziswa kohlobo lwe-slot sisetshenziswa ngokubambisana, imisebenzi yebhizinisi ecebile futhi enamandla kakhulu ingafezeka.
Isikhathi sokuthunyelwe: Julayi-20-2023