Kedu ihe bụ nhazi netwọkụ nke Optical Access Network (OAN)
Netwọk ohere anya (OAN) na-ezo aka n'iji eriri anya dị ka isi mgbasa ozi iji ghọta ọrụ nnyefe ozi nke netwọk ịnweta. Ejikọtara ya na ọnụ ọrụ site na ọdụ eriri anya (optical line terminal).OLT), wee jikọọ na onye ọrụ site na ngalaba netwọk anya (ONU). The ngwa anya eriri ohere netwọk na-agụnye n'ime obodo akụrụngwa- ngwa anya netwọk unit na Central ụlọ ọrụ akụrụngwa- ngwa anya akara ọnụ, nke ejikọrọ site nnyefe equipment.The isi akụkụ nke usoro bụ.OLTna ime obodoONU.Ha na-emecha ngbanwe nke ụkpụrụ mgbaàmà site na ọrụ node interface (SNI) na netwọk netwọk ọrụ (UNI) na netwọk ohere niile. Ngwa ịnweta n'onwe ya nwekwara ike ịkparịta ụka n'Ịntanet ma nwee ike ịmepụta ụdị dị iche iche nke topology netwọk. N'otu oge ahụ, ohere akụrụngwa nwekwara ọrụ nke obodo mmezi na remote centralized nlekota oru, na-akpụ a mmezi management netwọk site transperent ngwa anya nnyefe, na-eweta ya na netwọk management center maka ịdị n'otu management site kwekọrọ ekwekọ netwọk management protocol.
Ọrụ nkeOLTbụ inye interface n'etiti netwọk ohere na mpagharaịgbanwee, ma na-ekwurịta okwu na ngalaba netwọk anya n'akụkụ onye ọrụ site na nnyefe ngwa anya. Ọ na-ekewa kpamkpam ọrụ ngbanwe nkeịgbanweesite na ohere onye ọrụ. Ọnụ eriri anya anya na-enye nlekọta na nlekota onwe ya na njedebe onye ọrụ. Enwere ike itinye ya ozugbo na njedebe ụlọ ọrụ mgbanwe yana mgbanwe mpaghara, ma ọ bụ enwere ike ịtọ ya na njedebe dịpụrụ adịpụ.
Ọrụ nkeONUbụ inye interface n'akụkụ onye ọrụ maka netwọk ịnweta. Enwere ike ijikọ ya na ọnụ ọgụgụ ndị ọrụ dị iche iche, ma n'otu oge ahụ nwere ọrụ ntụgharị fotoelectric na nhazi na nlekota ọrụ kwekọrọ. Isi ọrụ nkeONUbụ akwụsị ngwa anya eriri siOLT, Hazie akara ngosi anya ma na-enye oghere ọrụ maka ọtụtụ obere azụmaahịa, ndị ọrụ azụmaahịa na ndị ọrụ obibi. Ngwunye netwọk nkeONUbụ ngwa anya interface, na njedebe onye ọrụ ya bụ ngwa eletrik. Ya mere,ONUnwere ngwa anya / eletriki na eletrik / ngwa ngbanwe ọrụ. Ọ nwekwara ọrụ nke dijitalụ/analog na analọg/dijitalụ mgbanwe nke mkparịta ụka. NkeONUa na-etinyekarị nso na onye ọrụ, na ọnọdụ ya nwere nnukwu mgbanwe.
A na-ekewa netwọọdụ ngwa anya ngwa anya (OAN) n'ime Active Optical Network (AON, Active Optical Network) na Passive Optical Network (PON, Passive Optica Optical Network) n'ihe gbasara nkesa sistemụ.
Ọdịdị topological nke netwọk ohere eriri anya na-ezo aka na nhazi geometric nke ahịrị nnyefe na ọnụ. Ọ na-egosi ọnọdụ otu na nhazi njikọ nke ọnụ ọ bụla na netwọk. Ọdịdị topological nke netwọk nwere mmetụta dị mkpa na ọrụ netwọk, ọnụ ahịa na ntụkwasị obi. Ihe owuwu topological atọ ndị bụ isi bụ: ụdị ụgbọ ala, yiri mgbanaka na ụdị kpakpando. Site na nke a, enwere ike nweta bọs-kpakpando, kpakpando abụọ, mgbanaka abụọ, ụgbọ ala na ụdị ngwa ngwa ndị ọzọ jikọtara ọnụ. Nke ọ bụla nwere njirimara nke ya na mgbakwunye ibe ya.