Kodi AON ndi chiyani?
AON ndi intaneti yogwira ntchito, makamaka imagwiritsa ntchito zomangamanga za point-to-point (PTP), ndipo wogwiritsa ntchito aliyense akhoza kukhala ndi mzere wodzipereka wa fiber. Active Optical network amatanthauza kutumizidwa kwama routers, ma aggregators osinthira, zida zowoneka bwino ndi zida zina zosinthira pakati pa zida zapakati paofesi ndi magawo ogawa ogwiritsa ntchito panthawi yotumizira ma sign. Ma switchgears awa amayendetsedwa ndi magetsi kuti azitha kuyang'anira kugawa kwazizindikiro ndi ma sign owongolera kwa makasitomala enieni. Zida zamagetsi zogwira ntchito zimaphatikizapo kuwala (laser), optical receiver, optical transceiver module, optical amplifier (fiber amplifier ndi semiconductor optical amplifier).
Kodi PON ndi chiyani?
PON ndi Passive Optical Network, mawonekedwe a point-to-multipoint network, ndipo ndiukadaulo waukulu wa FTTB/FTTH. Passive optical network imatanthawuza ODN (optical distribution network) imangogwiritsa ntchito ulusi wamagetsi ndi zigawo zokhazikika, ndipo zimangofunika kugwiritsa ntchito zida zamoyo pagwero lazizindikiro ndi malekezero olandila. Mu dongosolo la PON, chowotcha chowotcha ndiye pachimake, ndipo chowotcha chamagetsi chimagwiritsidwa ntchito kupatukana ndi kusonkhanitsa zizindikiro za kuwala zomwe zimafalitsidwa kudzera pa intaneti. Izi zogawanitsa za PON ndizolowera pawiri. Kumbali yakutsika, ntchito zingapo monga IP data, mawu, ndi makanema zimagawidwa ndi aOLTyomwe ili muofesi yapakati munjira yowulutsira kudzera pa 1:N passive Optical splitter mu ODN Kwa onseONUmayunitsi pa PON; kumtunda, zambiri zautumiki kuchokera kwa aliyenseONUimaphatikizidwa ndi ulusi womwewo wa kuwala kudzera mu 1:N chophatikizira chopanda kuwala mu ODN popanda kusokonezana, ndipo pamapeto pake chimatumizidwa kuOLTku ofesi yapakati polandirira alendo.
A passive optical network imaphatikizapo optical line terminal (OLT) yoikidwa pa siteshoni yapakati yolamulira, ndi gulu la mayunitsi ofananira optical network (ONU) idayikidwa patsamba la ogwiritsa ntchito. The Optical Distribution Network (ODN) pakati paOLTndiONUimakhala ndi ulusi wowoneka bwino komanso ma splitter kapena ma couplers. PON imagawidwa m'magulu atatu aukadaulo: ATM-based APON (ATM PON), Efaneti-based EPON (Ethernet PON), ndi GPON (Gigabit PON) kutengera General Frame Protocol.
Mu intaneti ya AON, wogwiritsa ntchito ali ndi mzere wodzipatulira wa optical fiber, womwe ndi wosavuta kukonzanso maukonde pambuyo pake, kukulitsa mphamvu, kukweza maukonde, ndi zina zotero. netiweki ya PON nthawi zambiri imakhala ndi zingwe za fiber optic mpaka ma kilomita 20. AON imatsogolera ma siginecha owoneka kudzera pazida zogwira ntchito, ndipo PON imagwiritsa ntchito zida zopanda magetsi, zomwe zimapangitsa kuti pakhale mtengo wokwera pakutumiza kwa netiweki ya AON kuposa PON.