I-PON ibhekisa kuthungelwano lwefiber optical passive, eyindlela ebalulekileyo yokufikelela kwiinkonzo zothungelwano olubanzi ekufuneka luqhutywe.
I-teknoloji ye-PON yavela kwi-1995. Kamva, ngokomahluko phakathi kwedatha yekhonkco yedatha kunye nomgangatho womzimba, iteknoloji ye-PON yahlulwa ngokuthe ngcembe kwi-APON, i-EPON, kunye ne-GPON. Phakathi kwabo, iteknoloji ye-APON isusiwe yimarike ngenxa yeendleko zayo eziphezulu kunye ne-bandwidth ephantsi.
1, EPON
Iteknoloji yePON esekelwe kwi-Ethernet. Yamkela i-point-to-multipoint structure kunye ne-passive optical fiber transmission ukubonelela ngeenkonzo ezininzi kwi-Ethernet. Itekhnoloji ye-EPON ibekwe emgangathweni liqela elisebenzayo le-IEEE802.3 EFM. Kulo mgangatho, iteknoloji ye-Ethernet kunye ne-PON zidibaniswe, iteknoloji ye-PON isetyenziswe kwinqanaba lomzimba, i-Ethernet protocol isetyenziswe kwi-data link layer, kunye ne-PON topology isetyenziselwa ukuqonda ukufikelela kwe-Ethernet.
Iingenelo zetekhnoloji ye-EPON yindleko ephantsi, i-bandwidth ephezulu, i-scalability eyomeleleyo, ukuhambelana ne-Ethernet ekhoyo, kunye nolawulo olulula.
Iimodyuli eziqhelekileyo zeEPON kwimarike zezi:
(1) EPONOLTI-PX20 +/PX20 ++/PX20 +++ imodyuli ye-optical, ilungele iyunithi yenethiwekhi ye-optical kunye ne-terminal ye-optical line, umgama wayo wokuhambisa i-20KM, i-mode eyodwa, i-SC interface, i-DDM yenkxaso.
(2) 10G EPONI-ONUImodyuli ye-SFP + ye-optical, ilungele iyunithi yenethiwekhi ye-optical kunye ne-terminal ye-optical line. Umgama wothumelo yi-20KM, imowudi enye, i-SC interface, kunye nenkxaso yeDDM.
I-10G EPON inokwahlulwa ibe ngamacandelo amabini ngokwezinga: imo ye-asymmetric kunye nemo ye-symmetric. Izinga le-downlink ye-asymmetric mode yi-10Gbit / s, i-uplink rate yi-1Gbit / s, kunye ne-uplink kunye ne-downlink ye-mode ye-symmetric zombini i-10Gbit / s.
2, GPON
I-GPON yaqala ukuphakanyiswa ngumbutho we-FSAN ngoSeptemba 2002. Ngesi siseko, i-ITU-T yagqiba ukuqulunqwa kwe-ITU-T G.984.1 kunye ne-G.984.2 ngo-Matshi 2003, kwaye yagqiba i-G.984.1 kunye ne-G.984.2 ngoFebruwari nangoJuni. 2004. 984.3 umgangatho. Ngaloo ndlela ekugqibeleni kwakhiwa usapho oluqhelekileyo lweGPON.
Ubuchwephesha be-GPON sisizukulwana samva nje se-broadband passive optical ehlanganisiweyo yokufikelela umgangatho osekelwe kumgangatho we-ITU-TG.984.x. Ineenzuzo ezininzi ezifana ne-bandwidth ephezulu, ukusebenza kakuhle okuphezulu, ukugubungela okukhulu, ujongano lomsebenzisi otyebileyo, kwaye ithathwa ngabasebenzisi abaninzi njengokuqonda Itekhnoloji efanelekileyo yokufikelela kwiinkonzo zenethiwekhi yebroadband kunye noguqulo olubanzi.
Iimodyuli eziqhelekileyo zeGPON ezibonakalayo kwimarike zezi:
(1) GPONOLTI-CLASS C +/C ++/C +++ imodyuli ye-optical, ifanelekile kwi-terminal yomgca we-optical, umgama wayo wokuhambisa ngu-20KM, umlinganiselo ngu-2.5G / 1.25G, imodi enye, i-SC interface, i-DDM yenkxaso.
(2) GPONOLTI-CLASS B + imodyuli ye-optical, ilungele i-terminal ye-optical line, umgama wayo wokuhambisa ngu-20KM, isivinini yi-2.5G / 1.25G, imodi enye, i-SC interface, i-DDM yokuxhasa.
