Chiwerengero choyambiriraus (O1)
ONU yomwe ili mu chikhalidwe ichi yangoyamba kumene ndipo ikadali ku LOS / LOF. Mukangolandira kutsika kwamtunda, LOS ndi LOF zimachotsedwa, ndipo ONU imasunthira kumalo oima (O2).
Standby status(O2)
ONU ya izi yalandira kutsika, kuyembekezera kulandira magawo a netiweki.Pamene ONU ilandira uthenga wa Upstream_Overhead, imapanga masinthidwe oyenera (mwachitsanzo, mawonekedwe a malire, mphamvu yamagetsi, kuchedwa kwadongosolo) ndikusamutsira ku chiwerengero cha nambala. (O3).
Siri Nambala (O3)
OLT imatumiza mauthenga a Serial-Number Request kwa onse a ONU omwe ali m'menemo kuti apeze ONU yatsopano komanso serial nambala yawo. OLT ikapeza ONU yatsopano, ONU imadikirira OLT kuti ipereke ONU-ID.OLT dutsani Mauthenga a Assign_ONU-ID akutanthauza kufanana kwa ONU-ID. ONU itapeza ONU-ID, imasamutsidwa kupita kumalo oyambira (O4).
Ranging status (O4)
Zizindikiro zosiyana zotumizira za ONU ziyenera kukhala zogwirizana pamene zifika ku OLT, kotero kuti ONU iliyonse imafunikira kuchedwa kwachiyanjano, ndipo chizindikiro ichi chikuyesedwa mu chikhalidwe chosiyana.The ONU imalandira uthenga wa Ranging_Time ndikusunthira kumalo othamanga (O5).
Udindo wothamanga (O5)
ONU mu chikhalidwe ichi akhoza kutumiza deta ya uplink ndi mauthenga a PLOAM pansi pa ulamuliro wa OLT, ndipo ONU mu chikhalidwe ichi ikhoza kukhazikitsanso malumikizano ena monga momwe amafunira. chizindikiro chochedwa kuti musunge mawonekedwe a uplink.Zizindikiro zomwe zimatumizidwa ndi ONU yosiyana zidzafika ku OLT padera, koma chizindikiro chilichonse chikuwoneka chimodzimodzi pamene chiyenera kuwonekera mu uplink frame.Imitsani ONU ikugwira ntchito: Panthawi yogwira ntchito, OLT ikhoza kuyambitsa. ONU kuyimitsa chizindikirocho kuti apeze nambala ya serial ya ONU ina kapena mtunda wina wa ONU.OLT imasiya kupereka chilolezo kwa bandwidth yonse ya uplink kwa nthawi, ONU imagwira ntchito mwachizolowezi, ndipo salandira chilolezo, kupanga nthawi yabata, kotero OLT imapangitsa ONU yonse kuyimitsa chizindikiro.
POPUP Status (O6)
Mkhalidwe umenewu umalowetsedwa pamene ONU mu ntchito (O5) imazindikira LOS kapena LOF.Pamenepo, ONU imasiya nthawi yomweyo kutumiza chizindikiro, kotero kuti OLT idzazindikira alamu ya LOS kwa ONU.Pamene ODN fiber imasokonezedwa, ambiri a ONU adzalowa m'derali, poganizira kudalirika kwa maukonde, m'njira izi:
Ngati kusinthika kwa chitetezo kutha, zonse za ONU zidzalowetsedwa ku fiber zosunga zobwezeretsera.Panthawiyi, ONU yonse idzayambiranso, ndipo OLT iyi imatumiza uthenga wa Broadcast POPUP kuti udziwitse onse ONU kuti alowe muyeso (O4).
Ngati palibe kutembenuzidwa kwa chitetezo koma ONU ili ndi mphamvu yotetezera mkati, OLT imatumiza uthenga Wotsogolera POPUP kuti udziwitse ONU kuti alowe mumayendedwe othamanga (O5) .Pamene ONU ikulowa mu O5, OLT iyenera kuzindikira ONU poyamba. ndiyeno Bwezeraninso bizinesi ya ONU.Ngati ONU sichichira ku LOS kapena LOF, ONU sidzalandira uthenga wa Broadcast POPUP kapena Directed POPUP message, ndipo pambuyo pa nthawi ya TO2, ONU imalowa mu chikhalidwe choyamba (O1) .
State Emergency Stop State (O7)
Pamene ONU ilandira uthenga wa Disable_Serial_Number ndi njira ya "Disable", ONU imalowa m'malo odzidzimutsa (O7) ndikuzimitsa laser.Mu dziko la O7, ONU imaletsedwa kutumiza zizindikiro.Ngati ONU sichilowa bwino. dziko la O7, ndipo OLT ikhoza kupitiriza kulandira zizindikiro kuchokera ku ONU, OLT imapanga alamu ya Dfi. ONU ikalephera, OLT imatumiza Disable_Serial_Number uthenga ndi Yambitsani ” njira yoyambitsa ONU.ONU imalandira uthenga ndikulowa. standby (O2) ndi magawo onse (kuphatikiza nambala ya siriyo ndi ONU-ID) amawunikidwanso.