Iyini idivayisi ye-ONU?

Iyunithi yenethiwekhi ye-optical ye-ONU (Optical Network Unit), i-ONU ihlukaniswe yaba iyunithi yenethiwekhi ye-optical esebenzayo kanye neyunithi yenethiwekhi ye-optical engasebenzi. Ngokuvamile, amadivayisi ahlonyiswe ngokuqapha inethiwekhi okuhlanganisa ama-optical receiver, ama-optical transmitter aphezulu, kanye nama-bridge amplifiers amaningi abizwa ngokuthi ama-optical nodes. I-PON isebenzisa i-optical fiber eyodwa ukuxhuma ku-OLT, bese i-OLT ixhuma ku-ONU. I-ONU inikeza izinsizakalo ezifana nedatha, i-IPTV (okungukuthi ithelevishini yenethiwekhi esebenzisana nayo), kanye nezwi (kusetshenziswa i-IAD, okungukuthi i-Integrated Access Device), eqaphela ngempela izinhlelo zokusebenza "zokudlala kathathu".

Izici

Khetha ukuthola idatha yokusakaza ethunyelwe yi-OLT;

Phendula emiyalweni yokulawula ububanzi kanye namandla ekhishwe yi-OLT; bese wenza izinguquko ezifanayo;

Faka idatha ye-Ethernet yomsebenzisi ku-cache bese uyithumela endaweni ephezulu efasiteleni lokuthumela elinikezwe yi-OLT;

Landela ngokugcwele i-IEEE 802.3/802.3ah;

·Ukuthola ukuzwela kuphezulu njengo-25.5dBm;

·Thumela amandla afinyelela ku--1 kuya ku-+4dBm;

I-PON isebenzisa i-fiber eyodwa yokukhanya ukuxhuma ku-OLT, bese i-OLT ixhuma ku-ONU. I-ONU inikeza izinsizakalo ezifana nedatha, i-IPTV (okungukuthi ithelevishini yenethiwekhi esebenzisana), kanye nezwi (kusetshenziswa i-IAD, okungukuthi Idivayisi Yokufinyelela Ehlanganisiwe), efinyelela izinhlelo zokusebenza "zokudlala kathathu";

·I-PON enezinga eliphezulu kakhulu: idatha ehambisanayo engu-10Gb/s ephezulu nephansi, izinsizakalo zezwi le-VoIP kanye nevidiyo ye-IP;

· I-ONU “plug and play” isekelwe ekutholakaleni okuzenzakalelayo kanye nokucushwa;

·Imisebenzi yekhwalithi yesevisi ethuthukisiwe (QoS) ngokusekelwe ekukhokhisweni kwesivumelwano sezinga lesevisi (SLA);

·Amakhono okuphatha kude asekelwa yimisebenzi ye-OAM ecebile nenamandla;

·Ukwamukela ukukhanya okuzwela kakhulu kanye nokusetshenziswa kwamandla okukhanya okufakwayo okuphansi;

·Sekela umsebenzi we-Faing Gasp;

Ukuhlukaniswa

Ukukhanya okusebenzayo

Iyunithi yenethiwekhi esebenzayo ye-optical isetshenziswa kakhulu uma amanethiwekhi amathathu ehlanganisiwe, futhi ihlanganisa ukuphuma kwe-CATV full-band RF; umsindo we-VOIP osezingeni eliphezulu; imodi yokuqondisa enezingqimba ezintathu, ukufinyelela okungenantambo kanye neminye imisebenzi, engenza kalula ukufinyelela kwemishini yokuhlanganisa ye-three-play.

Ukukhanya okungenamsebenzi

I-Passive ONU (Optical Network Unit) iyidivayisi eseceleni komsebenzisi yesistimu ye-GEPON (Gigabit Passive Optical Network), esetshenziselwa ukuqeda izinsizakalo ezithunyelwa kusuka ku-OLT (Optical Line Terminal) nge-EPON (Passive Optical Network). Isebenzisana ne-OLT, i-ONU ingahlinzeka ngezinsizakalo ezahlukahlukene ze-broadband kubasebenzisi abaxhunyiwe. Njengokuphequlula i-inthanethi, i-VoIP, i-HDTV, i-VideoConference nezinye izinsizakalo. I-ONU, njengedivayisi eseceleni komsebenzisi yezinhlelo zokusebenza ze-FTTx, iyidivayisi ye-terminal ene-bandwidth ephezulu futhi engabizi kakhulu edingekayo ekushintsheni kusuka "enkathini yekhebula lethusi" kuya "enkathini ye-fiber ye-optical". Njengesixazululo sokugcina sokufinyelela kwentambo kwabasebenzisi, i-GEPON ONU izodlala indima ebalulekile ekwakhiweni kwenethiwekhi iyonke ye-NGN (Next Generation Network) esikhathini esizayo.

I-UTStarcom ONU 1001i iyithuluzi le-terminal yomsebenzisi elingabizi kakhulu elisetshenziswa ezinhlelweni ze-GEPON. Yenzelwe abasebenzisi basekhaya nabasebenzisi be-SOHO, futhi inikeza ukuxhumana kwe-broadband ye-gigabit yamasango abasebenzisi kanye/noma ama-PC. I-ONU 1001i inikeza ichweba elilodwa lenethiwekhi ye-1000Base-TEthernet yedatha kanye nezinsizakalo zevidiyo ze-IPTV. I-ONU1001i ingalungiswa futhi iphathwe kude yi-UTStarcom BBS series optical line terminal (OLT).

isicelo

I-ONU 1001i engenhla ixhunywe ehhovisi eliphakathi (CO) ngembobo ye-GEPON, kanti i-downstream ingeyabasebenzisi ngabanye noma abasebenzisi be-SOHO ukuhlinzeka ngembobo yenethiwekhi ye-Gigabit Ethernet eyi-1. Njengesixazululo sesikhathi esizayo se-FTTx, i-ONU 1001i inikeza izinsizakalo zezwi ezinamandla, idatha yesivinini esikhulu kanye nevidiyo nge-single-fiber GEPON.