Optical network terminal (eo hangata e tsejoang ka hore ke optical cat kapa modem ea optical), e bolela phetisetso ka th.e fiber medium, optical signal modulation le demodulation ho matšoao a mang a protocol ea thepa ea marang-rang. Sesebelisoa sa Lightcat se sebetsa e le sesebelisoa sa phetisetso bakeng sa marang-rang a maholo a libaka, marang-rang a libaka tsa litoropo le marang-rang a libaka tse pharaletseng. Ho fapana le transceiver ea optical, transceiver ea optical e amohela feela le ho ntša leseli, 'me ha e akarelletse ho fetoloa ha protocol.
Modem ke sesebelisoa sa elektroniki se fetolang lets'oao la dijithale ho lets'oao la analoge hore le fetisetsoe, 'me se theole lets'oao le amoheloang la analoge ho fumana lets'oao la dijithale. Sepheo sa eona ke ho hlahisa letšoao la analog le ka fetisoang habonolo le ho tsosolosa digita ea peleKe bontša ka ho decoding. Ho ipapisitsoe le ts'ebeliso, MODEM e ka sebelisa mekhoa e fapaneng ho fetisa matšoao a analog, joalo ka fiber optics, radio ea RF, kapa mehala ea mohala.
Limodemo tsa mohala tse sebelisang sehlopha sa molumo oa mohala o tloaelehileng oa mohala bakeng sa puisano ea data ke most hangata kopana le modem. Ka Senyesemane se buuoang, batho ba bangata ba bitsa modem ea mohala e le "katse" kapa "magic" ho latela lentsoe la pele la mantsoe a Senyesemane.
Li-modem tse ling tse tloaelehileng li kenyelletsa li-modem tsa cable bakeng sa phihlello ea data ea Broadband, modem ea ADSL, le fiber modem. Mohala oa thekeng oa dijithale ha e le hantle ke modem e se nang mohala. Thepa ea sejoale-joale ea phetisetso ea mehala ea mehala e etselitsoe ho fetisetsa lintlha tse ngata libakeng tse telele ho mecha ea litaba e fapaneng, ka hona e boetse e thehiloe ts'ebetsong ea modem. Li-modem tsa microwave li ka sebelisoa ho limilione tsa li-bits ka motsotsoana. Modem ea optical e sebelisang fiber ea optical e le mokhoa oa phetisetso o ka fihlang ho feta mashome a Gbps, hona joale ke mokokotlo oa phetisetso ea lithelefono Passive optical network (Passive optical network), e tsejoang hape e le passive optical fiber network, ke mofuta oa puisano ea fiber optical. marang-rang, e khetholloang ke ho se phepelo ea motlakase ho phethahatsa ts'ebetso ea pontšo, joalo ka seipone lapeng, ha e hloke motlakase ho bonahatsa setšoantšo, ho phaella ho lisebelisoa tsa ho qetela li hloka ho sebelisa motlakase, Li-node tse bohareng li entsoe ka likaroloana tse bobebe le tse nyane tsa fiber optic.
Ho ea ka mohopolo oa New Generation Network (NGN), marang-rang a puisano a ka aroloa likarolo tse peli: marang-rang a mantlha le marang-rang a phihlello. Marang-rang a mantlha a lekana le mehala e tloaelehileng ea relay le ea sebaka se selelele. Marang-rang a phihlello a na le selikalikoe sa likhoele tsa fiber optic. Mesebetsi ea marang-rang a mantlha le marang-rang a phihlello a fapane, 'me mefuta ea bona ea phetisetso le eona e fapane. Ka hona, lits'ebetso tsa PON li ka aroloa ka mefuta e 'meli: PON ea marang-rang a mantlha le PON ea marang-rang a phihlello. Ea pele e thehiloe haholo-holo ho WDM, 'me ea morao-rao e sebelisa lisebelisoa tsa optical diverter le WDM.
Tsebo e ka holimo ke tlhaloso e khuts'oane mabapi le terminal ea marang-rang ea optical e tlisoang ke Shenzhen HDV Phoelectron Technology LTD., e leng moetsi ea sebetsanang le thepa ea marang-rang ea puisano e le lihlahisoa tsa eona tsa mantlha. Lisebelisoa tsa bona tse amanang le tsona li amana le:oltonu/ bohlaleonu/ aconu/ fiberonu/ catvonu/gpononu/xpononu/ oltthepa/oltswitjha/gponolt/ eponoltjoalo-joalo, amohela basebelisi ho tla lipuisanong tsa sehlahisoa.
