Isibalo sokuqalaus (O1)
I-ONU kulesi simo isanda kuvulwa futhi iseku-LOS / LOF.Uma umfula ongezansi sewamukelwe, i-LOS ne-LOF iyasuswa, bese i-ONU ithuthela esimweni sokulinda (O2).
Izibalo ezilindileus(O2)
I-ONU yalesi simo ithole eyehlayo, ilindele ukuthola imingcele yenethiwekhi.Lapho i-ONU ithola umlayezo we-Upstream_Overhead, yenza ukumisa okufanelekile (isb, uhlamvu lokuklama, imodi yamandla, ukubambezeleka kokulinganisa okusethiwe) bese idlulisela esimweni senombolo yomkhiqizo. (O3).
Isimo senombolo yomkhiqizo (O3)
I-OLT ithumela imilayezo ye-Serial-Number Application kuyo yonke i-ONU ekuleso simo ukuze ithole i-ONU entsha kanye nenombolo yayo yomkhiqizo.Lapho i-OLT ithola i-ONU entsha, i-ONU ilinda i-OLT ukuthi iyinike i-ONU-ID.OLT dlula Umlayezo we-Assign_ONU-ID ubhekisela ekufaneni kwe-ONU-ID.Ngemva kokuba i-ONU ithole i-ONU-ID, idlulisela esimweni esisukela ku-(O4).
Ri-anging status (O4)
Izimpawu ezihlukene ezithumelayo ze-ONU kufanele zihlale zivunyelanisiwe lapho zifika ku-OLT, ukuze i-ONU ngayinye idinge ukubambezeleka kokulinganisa, futhi le pharamitha ikalwa ngesimo esisukelayo.I-ONU ithola umlayezo we-Ranging_Time bese ithuthela esimweni sokusebenza (O5).
Isimo sokugijima (O5)
I-ONU kulesi simo ingathumela idatha ye-uplink nemilayezo ye-PLOAM ngaphansi kokulawula kwe-OLT, futhi i-ONU kulesi simo ingase futhi isungule okunye ukuxhumana njengoba kudingekile. isignali yokulibazisa ukuze ugcine ifreyimu ye-uplink ivunyelanisiwe.Izimpawu ezithunyelwa i-ONU ehlukene zizofika ku-OLT ngokuhlukana, kodwa isignali ngayinye ivela lapho kufanele ivele khona kufreyimu ye-uplink.Misa isikhashana i-ONU isebenza: Ngesikhathi sokusebenza okuvamile, i-OLT ingase ibangele. i-ONU ukumisa isignali ukuze ithole inombolo ye-serial yenye i-ONU noma ibanga enye i-ONU.OLT iyeka ukunikeza amalayisense wonke umkhawulokudonsa we-uplink isikhathi esithile, i-ONU isebenza ngendlela evamile, futhi ayikutholi ukugunyazwa, idala isikhathi esithule, I-OLT ibangela ukuthi yonke i-ONU imise isignali.
Isimo se-POPUP (O6)
Lesi simo singena lapho i-ONU esesimweni sokusebenza (O5) ithola i-LOS noma i-LOF.Kulesi simo, i-ONU iyayeka ngokushesha ukuthumela isignali, ukuze i-OLT ibone i-alamu ye-LOS ye-ONU.Lapho i-ODN fiber iphazamisekile, i-ONU eminingi izongena kulesi simo, ngokucabangela ukwethembeka kwenethiwekhi, ngenye yalezi zindlela ezilandelayo:
Uma ukuguqulwa kokuvikela kunikwe amandla, yonke i-ONU izophendulela ku-fiber eyisipele.Kuleli qophelo, yonke i-ONU izophinda isebenze, futhi le OLT ithumela umlayezo we-POPUP Yokusakaza ukuze yazise yonke i-ONU ukuthi ifake isimo esisukelayo (O4).
Uma kungekho ukuguqulwa kokuvikela kodwa i-ONU inamandla okuvikela angaphakathi, i-OLT ithumela umlayezo we-POPUP Oqondisiwe ukuze yazise i-ONU ukuthi ifake isimo sokusebenza (O5).Lapho i-ONU ingena esimweni se-O5, i-OLT idinga ukuthola i-ONU kuqala. bese Ubuyisela ibhizinisi le-ONU.Uma i-ONU ingabuyiseli ku-LOS noma i-LOF, i-ONU ngeke ithole umlayezo we-POPUP Wokusakaza noma umlayezo Oqondisiwe we-POPUP, futhi ngemva kwesikhathi se-TO2, i-ONU ingena esimweni sokuqala (O1) .
I-Emergency Stop State (O7)
Uma i-ONU ithola umlayezo we-Disable_Serial_Number onenketho ethi "Khubaza", i-ONU ingena endaweni yokumisa izimo eziphuthumayo (O7) bese ivala i-laser. Esimeni se-O7, i-ONU ayivunyelwe ukuthumela amasignali.Uma i-ONU ingangeni ngempumelelo. isimo se-O7, futhi i-OLT ingaqhubeka nokuthola amasignali avela ku-ONU, i-OLT ikhiqiza i-alamu ye-Dfi.Uma i-ONU yehluleka, i-OLT ithumela umlayezo we-Diable_Serial_Number onenketho ethi Vumela ” ukuvula i-ONU.ONU ithola umlayezo bese ingena. okubekwe eceleni (O2) kanye nawo wonke amapharamitha (okuhlanganisa inombolo yomkhiqizo ne-ONU-ID) ayahlolwa kabusha.