Isibalo sokuqalaus (O1)
II-ONUkulesi simo sisanda kuvulwa futhi sise-LOS / LOF. Uma umfula ongezansi sewamukelwe, i-LOS ne-LOF iyaqedwa, futhiI-ONUiya kusimo sokulinda (O2).
Izibalo ezilindileus(O2)
II-ONUyalesi simo ithole eyehlayo, ilindele ukuthola imingcele yenethiwekhi.Lapho iI-ONUithola umlayezo we-Upstream_Overhead, yenza ukumisa okufanelekile (isb, uhlamvu lokuklama, imodi yamandla, ukubambezeleka kokulinganisa okusethiwe) bese idlulisela esimweni senombolo ye-serial (O3).
Isimo senombolo yomkhiqizo (O3)
IOLTithumela imilayezo yesicelo se-serial-Number kuwo wonke ama-I-ONUkuleso simo ukuze uthole okushaI-ONUkanye nenombolo yabo ye-serial.Lapho iOLTithola entshaI-ONU, iI-ONUilindele iOLTukuyinika iI-ONU-ID.OLTdlula Umlayezo we-Assign_ONU-ID ubhekisela kumdlalo we-ONU-ID.NgemvaI-ONUutholaI-ONU-ID, idlulisela esimweni esisukela (O4).
Ri-anging status (O4)
OkuhlukileI-ONUukuthumela amasignali kufanele ahlale evunyelanisiwe lapho befikaOLT, ukuze ngamunyeI-ONUidinga ukubambezeleka kokulinganisa, futhi le parameter ikalwa ngesimo esisukelayo.II-ONUithola umlayezo we-Ranging_Time bese ithuthela esimweni sokusebenza (O5).
Isimo sokugijima (O5)
II-ONUkulesi simo singathumela idatha ye-uplink nemilayezo ye-PLOAM ngaphansi kokulawula kwe-OLT, kanyeI-ONUkulesi simo kungaphinda kusungulwe okunye ukuxhumana njengoba kudingeka.Lapho ukulinganisa kuphumelela, konkeI-ONUzithunyelwa ngokuya ngesignali yazo yokulibaziseka yesikhathi sokulingana ukuze kugcinwe ifreyimu ye-uplink ivunyelanisiwe.Amasiginali athunyelwa abahlukeneI-ONUuzofika kuOLTngokwehlukana, kodwa isignali ngayinye ivela lapho kufanele ivele khona kuhlaka lwe-uplink.Misa kancaneI-ONUisebenza: Ngesikhathi sokusebenza okujwayelekile, iOLTkungase kubangeleI-ONUukumisa isignali ukuze uthole inombolo yomkhiqizo wenyeI-ONUnoma ibanga omunyeI-ONU.OLTiyeka ukugunyaza wonke umkhawulokudonsa we-uplink okwesikhashana,I-ONUisebenza ngendlela evamile, futhi ayikutholi ukugunyazwa, idala isikhathi sokuthula, ngakhoOLTkubangela konkeI-ONUukumisa isignali.
Isimo se-POPUP (O6)
Lesi simo sifakwa uma i-I-ONUesimweni sokusebenza (O5) ithola i-LOS noma i-LOF.Kulesi simo, iI-ONUngokushesha uyeka ukuthumela isignali, ukuze iOLTizothola i-alamu ye-LOS yeI-ONU.Lapho i-ODN fiber iphazamiseka, abaningiI-ONUizongena kulesi simo, ngokucabangela ukwethembeka kwenethiwekhi, ngenye yalezi zindlela ezilandelayo:
Uma ukuguqulwa kokuvikela kunikwe amandla, konkeI-ONUizophendulela ku-fiber eyisipele.Kuleli qophelo, konkeI-ONUuzophinda futhi, futhi lokhuOLTithumela umlayezo we-POPUP Wokusakaza ukuze wazise bonkeI-ONUukufaka isimo esukela (O4).
Uma kungekho inversion yokuvikela kodwaI-ONUinamandla okuvikela angaphakathi, iOLTithumela umlayezo we-POPUP oqondiswe ukwazisa iI-ONUukufaka isimo sokugijima (O5).Lapho iI-ONUingena kusimo se-O5, iOLTidinga ukubona iI-ONUkuqala bese Buyisela ibhizinisi leI-ONU.Uma iI-ONUayilulami ku-LOS noma i-LOF, iI-ONUngeke ithole umlayezo we-POPUP Wokusakaza noma umlayezo Oqondisiwe we-POPUP, futhi ngemva kwesikhathi se-TO2, iI-ONUingena esimweni sokuqala (O1).
I-Emergency Stop State (O7)
Lapho i-I-ONUithola umlayezo we-Diable_Serial_Number onenketho ethi "Khubaza", iI-ONUingena esimweni esiphuthumayo sokumisa (O7) bese ivala i-laser.Esifundeni se-O7, iI-ONUkwenqatshelwe ukuthumela amasignali.Uma iI-ONUayingeni ngempumelelo ku-O7 state, kanye ne-OLTbangaqhubeka nokuthola amasignali ku-I-ONU, iOLTyakha i-alamu ye-Dfi.Lapho iI-ONUehluleka, iOLTithumela umlayezo we-Disable_Serial_Number onenketho ethi Vumela ” ukuvula ifayelaI-ONU.I-ONUithola umlayezo bese ingena okubekwe eceleni (O2) futhi wonke amapharamitha (okuhlanganisa inombolo ye-serial kanye ne-ONU-ID) ayahlolwa kabusha.