Yintoni isixhobo se-ONU?

Iyunithi yenethiwekhi ye-optical ye-ONU (i-Optical Network Unit), i-ONU yahlulwe yaba yiyunithi yenethiwekhi ye-optical esebenzayo kunye neyunithi yenethiwekhi ye-optical engasebenziyo. Ngokubanzi, izixhobo ezixhotyiswe ngokubeka esweni inethiwekhi kuquka ii-optical receivers, ii-optical transmitters eziphezulu, kunye nee-bridge amplifiers ezininzi zibizwa ngokuba zii-optical nodes. I-PON isebenzisa i-optical fiber enye ukuqhagamshela kwi-OLT, ize emva koko i-OLT iqhagamshela kwi-ONU. I-ONU ibonelela ngeenkonzo ezifana nedatha, i-IPTV (umz. umabonwakude wenethiwekhi osebenzisanayo), kunye nelizwi (kusetyenziswa i-IAD, umz. i-Integrated Access Device), ezifezekisa ngokwenene usetyenziso "oludlala kathathu".

Iimbonakalo

Khetha ukufumana idatha yosasazo ethunyelwe yi-OLT;

Phendula kwimiyalelo yokulawula ububanzi kunye namandla ekhutshwe yi-OLT; kwaye wenze uhlengahlengiso olufanelekileyo;

Cache idatha ye-Ethernet yomsebenzisi uze uyithumele kwi-upstream kwifestile yokuthumela eyabelwe yi-OLT;

Thobela ngokupheleleyo i-IEEE 802.3/802.3ah;

·Ukufumana uvakalelo oluphezulu lufikelela kwi -25.5dBm;

·Thumela amandla ukuya kuthi ga kwi -1 ukuya kwi +4dBm;

I-PON isebenzisa ifayibha enye ye-optical ukuqhagamshela kwi-OLT, ize i-OLT iqhagamshelane ne-ONU. I-ONU ibonelela ngeenkonzo ezifana nedatha, i-IPTV (umz. ithelevishini yenethiwekhi esebenzisana nayo), kunye nelizwi (kusetyenziswa i-IAD, umz. i-Integrated Access Device), efezekisa usetyenziso "oludlala kathathu";

·I-PON exabiso liphezulu: idatha ye-10Gb/s ehambelanayo nedatha esezantsi, iinkonzo zelizwi le-VoIP kunye nevidiyo ye-IP;

· I-ONU “plug and play” isekelwe ekufumaneni ngokuzenzekelayo kunye noqwalaselo;

·Imisebenzi yomgangatho ophezulu wenkonzo (QoS) esekwe kwisivumelwano senqanaba lenkonzo (SLA);

·Izakhono zolawulo olukude ezixhaswa yimisebenzi ye-OAM etyebileyo nenamandla;

·Ukufumana ukukhanya okubonakalayo okuphezulu kunye nokusetyenziswa kwamandla okukhanya okufakayo okuphantsi;

·Inkxaso yomsebenzi we-Dieing Gasp;

Ulwahlulo

Ukukhanya okusebenzayo

Iyunithi yenethiwekhi esebenzayo ye-optical isetyenziswa kakhulu xa kudityaniswe iinethiwekhi ezintathu, kwaye idibanisa imveliso ye-CATV yebhendi epheleleyo ye-RF; isandi se-VOIP esikumgangatho ophezulu; imo yendlela yokuhambisa eneeleya ezintathu, ukufikelela ngaphandle kwentambo kunye neminye imisebenzi, enokwenza lula ukufikelela kwizixhobo zesiphelo sokudibanisa ezidlala kathathu.

Ukukhanya okungasebenziyo

I-Passive ONU (iYunithi yeNethiwekhi ye-Optical) sisixhobo esisecaleni lomsebenzisi senkqubo ye-GEPON (iGigabit Passive Optical Network), esetyenziselwa ukuphelisa iinkonzo ezithunyelwa kwi-OLT (i-Optical Line Terminal) nge-EPON (i-Passive Optical Network). Isebenzisana ne-OLT, i-ONU inokubonelela ngeenkonzo ezahlukeneyo ze-broadband kubasebenzisi abaxhunyiweyo. Ezifana nokuphequlula kwi-intanethi, i-VoIP, i-HDTV, i-VideoConference kunye nezinye iinkonzo. I-ONU, njengesixhobo esisecaleni lomsebenzisi kwizicelo ze-FTTx, sisixhobo se-terminal esine-bandwidth ephezulu kwaye esingabizi kakhulu esifunekayo ekutshintsheni ukusuka "kwixesha lekhebula lethusi" ukuya "kwixesha le-fiber ye-optical". Njengesisombululo sokugqibela sokufikelela kwi-wireless kwabasebenzisi, i-GEPON ONU iya kudlala indima ebalulekileyo ekwakheni inethiwekhi iyonke ye-NGN (iNext Generation Network) kwixesha elizayo.

I-UTStarcom ONU 1001i sisixhobo sesiphelo somsebenzisi esingabizi kakhulu esisetyenziswa kwiinkqubo ze-GEPON. Yenzelwe abasebenzisi basekhaya kunye nabasebenzisi be-SOHO, kwaye ibonelela ngoqhagamshelo lwe-broadband ye-gigabit kwiingcango zomsebenzisi kunye/okanye iiPC. I-ONU 1001i ibonelela ngezibuko elinye lenethiwekhi ye-1000Base-TEthernet yedatha kunye neenkonzo zevidiyo ze-IPTV. I-ONU1001i inokumiselwa kude kwaye ilawulwe yi-UTStarcom BBS series optical line terminal (OLT).

isicelo

I-ONU 1001i ephezulu iqhagamshelwe kwi-ofisi ephakathi (CO) ngezibuko le-GEPON, kwaye i-downstream yenzelwe abasebenzisi ngabanye okanye abasebenzisi be-SOHO ukubonelela ngezibuko lenethiwekhi ye-Gigabit Ethernet eli-1. Njengesisombululo sexesha elizayo se-FTTx, i-ONU 1001i ibonelela ngeenkonzo ezinamandla zelizwi, idatha ekhawulezayo kunye nevidiyo nge-single-fiber GEPON.