Multiplexers ea SDH: tlhaloso, morero

Lisebelisoa tse ngata tsa di-digital ke lisebelisoa tse kopanetsoeng tse nang le moelelo tse etselitsoeng ho fetisa tlhahiso ea tlhahisoleseding ho tloha mehloling e mengata ea litaba ho ea mocha o le mong o hlahang. Ha e le hantle, sesebelisoa se joalo ke palo e mengata ea ho fetola boemo ba digital. Ka lebaka leo, ho ka fihleloa qeto ea hore multiplexer digital ke sesebelisoa sa lipontšo ho e le 'ngoe e hlahisoang molaong. Sehloohong sena re tla tšohla mefuta e fapaneng ea lisebelisoa - li-multiplexers tsa optical SDH.

Lisebelisoa tse joalo li etselitsoe ho sebetsana le melapo ea ditshebetso ho sebelisa mabala a khanyang, a fapaneng ka ho lekanngoa kapa ho aroloa ha karolo , hammoho le ka bokahohle. Li-multiplexers tsa SDH li fetisa tlhahisoleseding ka litsela tsa E1 le mela ea Ethernet ka marang-rang a tsamaiso ea fiber-optic. Ba sebetsa ka leihlo le le leng kapa a mabeli a optical (single-mode kapa multimode) ka lebelo la 155, 520 Mbit / s ka boholo ba 1550/1310 nm. Multiplexers SDH e lumella ho fihlela lintlha tse 126 tsa puisano.

Melemo ea lisebelisoa tse joalo e kenyelletsa ho hanyetsa litšusumetso tsa ka ntle, ts'ireletso ea theknoloji, ts'ireletso khahlanong le ho qhoqhoa ha tlhahisoleseding e fetisitsoeng

Li-multiplexers tsa SDH li khoneha haholoanyane ka ho kenyeletsa moxeng o moholo ho fihlela ho li-module tse tharo tse eketsehileng bakeng sa phetiso ea mechine ea Ethernet, melapo ea E1, khokahanyo ea tšebeletso le seteishene sa PM.

Lisebelisoa tsena li khetholloa ke "pholoho" e phahameng ea marang-rang. Ts'ebetsong ea melapo ea E1 e na le boleng bo tlase ba jitter, ka lebaka la sena, melao ea E1 e hlokomeloa nakong ea ts'ebetso ea ho lumellana, hape ha ho lumellana ha mokhoa oa STM-1 o felile. Mekhahlelo ea liphatlalatso e lumella hore u latelle phoso ka mocha oa puisano ebe u fetela setsing se sa lekaneng. Tsela e sebetsang le matla a matla a bolokiloe ho latela morero oa 1 + 1. Ka mantsoe a mang, ha u sebetsa mochine o mong oa fiber optic, haeba mocheso o senya , puisano pakeng tsa ba ngolisitsoeng e bolokiloe.

Multiplexers SDH e kopantsoe habonolo le lisebelisoa tse ling tse kang SDH. Li ka sebetsana ka litsela tse peli tse lumellanang le li-synchronous, li lumelloa ho sebelisa fiber e nang le multimode le mokhoa o le mong. Multixerse ea SDH e tšehetsa ho laola le ho laola hole ho TCP / IP protocol, 10/100 BaseT.

Lisebelisoa tse joalo tsa ho fetola hangata li arotsoe ka mefuta e 'meli: liphallelo le ho kenya / ho tsoa. Phapang pakeng tsa mefuta ena ha e sebetsane le likoung, empa ho behoa ha sesebelisoa moetong oa SDH. Hangata multiplexer e qetellang e qetella likakaretso tsa mechine, e fetola har'a tsona litsamaiso tse kholo tsa lits'ebeletso le lits'ebeletso. Mofuta oa bobeli oa lisebelisoa o fetisetsa mela e pharaletseng ka tsela e tsamaeang, e sebetsa sebakeng se bohareng tseleng e kholo. Tabeng ena, tlhahisoleseding ea mechine ea liphallelo e tsoa ho palo e akaretsang kapa e kenngoa ho eona.

Boholo ba lihlahisoa li hlahisa multiplexers tsa bokahohleng tse kang SDH, tse sebelisoang e le sehlahisoa / sehlahisoa, li-terminal le li-cross-connectors - ho itšetlehile ka li-modules tse kenngetsoeng ho tsona ka likoung tse ngata tsa marang-rang.

Qetellong, rea phaella ka hore li-multiplexers tsa fiber-optic li ntse li tumme ka ho eketseha ka lebaka la tsoelo-pele e matla ea mofuta ona oa puisano. Bokamoso ke thekenoloji ea fiber-optic.