Cibiyar sadarwa ta gani ita ce hanyar sadarwa wacce ke amfani da haske azaman hanyar watsawa, mai maye gurbin wayoyi na jan karfe, kuma ana amfani da ita don shiga kowane gida.Cibiyar sadarwar gani gabaɗaya ta ƙunshi sassa uku: tashar tashar OLT ta gani, naúrar hanyar sadarwa ta gani ONU, da cibiyar rarrabawar gani ta ODN, wacce ainihin abubuwan cibiyar sadarwa ta OLT da ONU.
Menene OLT?
Cikakken sunan OLT shine Tashar Layin Layin gani, tashar layin gani.OLT tashar tashar layin gani ce, kuma ita ce kayan aikin ofishi na tsakiya na sadarwa.Ana amfani da shi don haɗa kututturen fiber na gani.Yana aiki azaman mai sauyawa ko na'ura mai ba da hanya tsakanin hanyoyin sadarwa a cibiyar sadarwar gargajiya.Na'ura ce don mashigar cibiyar sadarwa ta waje da mashiga da fita na cibiyar sadarwa ta ciki.An sanya shi a babban ofishi, mafi mahimmancin ayyukan aiwatarwa shine tsarin zirga-zirga, sarrafa buffer, da samar da mu'amalar hanyar sadarwa mai ma'ana ta mai amfani da rarraba bandwidth.A cikin sauƙi mai sauƙi, yana aiwatar da ayyuka guda biyu: zuwa sama, yana kammala samun damar hanyar sadarwa ta PON;kuma a ƙasa, yana aika bayanan da aka samu zuwa duk kayan aikin tashar mai amfani da ONU ta hanyar sadarwar ODN.
Menene ONU?
ONU ita ce Sashin hanyar sadarwa na gani.ONU tana da ayyuka guda biyu: Zaɓin karɓar watsa shirye-shiryen da OLT ta aiko, da karɓar amsa ga OLT idan bayanan suna buƙatar karɓar;tattara da cache bayanan Ethernet da mai amfani ke buƙatar aikawa, kuma aika zuwa OLT bisa ga taga aikawa da aka ware Aika bayanan da aka adana.
Hanyoyin tura ONU a cikin cibiyoyin sadarwa na FTTx daban-daban su ma sun bambanta.Misali, FTTC (Fiber To The Curb): ONU ana sanya shi a tsakiyar dakin kwamfuta na al'umma;FTTB (Fiber Zuwa Ginin): Ana sanya ONU a cikin akwatin junction na corridor;FTTH (Fiber Zuwa Gida): Ana sanya ONU a cikin masu amfani da gida.
Menene ONT?
ONT ita ce tashar tashar sadarwa ta Optical, mafi girman rukunin FTTH, wanda aka fi sani da "katsin gani", kama da xDSL cat na lantarki.ONT tashar tashar sadarwa ce ta gani kuma ana amfani da ita don masu amfani na ƙarshe.ONU tana nufin rukunin cibiyar sadarwa na gani.Wataƙila akwai wasu hanyoyin sadarwa tsakaninta da mai amfani na ƙarshe.ONT wani bangare ne na ONU.
Menene alakar ONU da OLT?
OLT ita ce ƙarshen gudanarwa, kuma ONU ita ce tasha;Ana isar da tanadin sabis na ONU ta hanyar OLT, kuma su biyun suna cikin dangantakar bawa da bawa.Ana iya rataye ONU da yawa ta hanyar tsaga a ƙarƙashin OLT.
Menene ODN?
ODN shine Cibiyar Rarraba Rarraba gani, wanda shine tashar zahiri ta watsawar gani tsakanin OLT da ONU.Babban aikin shine kammala watsa siginar gani na gani biyu.Yawancin lokaci waɗannan ana haɗa su ta hanyar igiyoyin fiber optic, masu haɗin gani, masu rarraba gani, da shigarwa.Kayan aikin tallafi na na'urar sun ƙunshi masu rarraba gani.
