Ndi kusintha kosalekeza kwa zomangamanga zothamanga kwambiri komanso kufunikira komanga moyo wanzeru wa digito pogwiritsa ntchito luso la "gigabit atatu", ogwira ntchito amafunika mtunda wautali wotumizira, ma bandwidth apamwamba, kudalirika kwamphamvu komanso ndalama zochepa zogwirira ntchito (OPEX), ndi GPON imathandizira ntchito zingapo kuti zikwaniritse zosowa za makasitomala.
GPON ndi chiyani?
GPON ndi chidule cha Gigabit Passive Optical Network, chotanthauzidwa ndi ndondomeko za ITU-T G.984.1 mpaka G.984.6. GPON imatha kutumiza osati Efaneti yokha, komanso ATM ndi TDM (PSTN, ISDN, E1 ndi E3) magalimoto. Mbali yake yayikulu ndikugwiritsa ntchito ma splitter ophatikizika mu network ya optical fiber distribution network, yokhala ndi njira yofikira ku multipoint, kugwiritsa ntchito ulusi umodzi wamagetsi womwe ukubwera kuchokera kudera lapakati la operekera maukonde kuti azitumikira mabanja angapo ndi ogwiritsa ntchito mabizinesi ang'onoang'ono.
GPON, EPON ndi BPON
EPON (Ethernet Passive Optical Network) ndi GPON ali ndi matanthauzo ofanana kwambiri. Onsewa ndi maukonde a PON ndipo onse amagwiritsa ntchito zingwe zowoneka bwino komanso ma frequency owoneka bwino.Mlingo wa maukonde awiriwa munjira yakumtunda ndi pafupifupi 1.25 Gbits / s. Ndipo BPON (Broadband Passive Optical Network) ndi GPON nawonso ndi ofanana kwambiri. Onse amagwiritsa ntchito ulusi wa kuwala ndipo amatha kupereka chithandizo kwa ogwiritsa ntchito 16 mpaka 32. Mafotokozedwe a BPON amatsatira ITU-T G983.1, ndipo GPON imatsatira ITU-T G984.1. Pamene ntchito za PON zinayamba kuyambitsidwa, BPON inali yotchuka kwambiri.
GPON ndi yotchuka kwambiri pamsika wa optical fiber. Kuphatikiza paukadaulo wake wapamwamba, ilinso ndi izi:
1.Range: Fiber yamtundu umodzi imatha kutumiza deta kuchokera ku 10 mpaka 20 makilomita, pamene zingwe zamkuwa zamkuwa nthawi zambiri zimakhala zochepera mamita 100.
2.Speed: Kutsika kwa EPON kutsika ndi kumtunda kwamtunda, komwe ndi 1.25 Gbit / s, pamene kutsika kwa GPON ndi 2.48 Gbit / s.
3.Security: Chifukwa cha kudzipatula kwa zizindikiro mu fiber optical, GPON kwenikweni ndi njira yotetezeka. Chifukwa amafalitsidwa mozungulira mozungulira ndipo amakhala ndi encryption, GPON singabedwe kapena kujambulidwa.
4.Kutheka: Zingwe za GPON fiber optic ndizotsika mtengo kuposa zingwe za LAN zamkuwa, ndipo zimatha kupewanso ndalama zopangira ma waya ndi zida zamagetsi zamagetsi, potero zimapulumutsa ndalama.
5.Kupulumutsa mphamvu: Mosiyana ndi waya wamkuwa wamkuwa m'magulu ambiri, mphamvu ya mphamvu ya GPON ikuwonjezeka ndi 95%. Kuphatikiza pakuchita bwino, ma gigabit passive optical networks amaperekanso njira yotsika mtengo yomwe imatha kukulitsa ogwiritsa ntchito kudzera pa splitters, yomwe imadziwika kwambiri m'malo okhala anthu ambiri.