Ngokuvamile, amandla akhanyayo we-fiber optical transceiver noma i-optical module kanje: i-multimode iphakathi kwe-10db ne--18db;imodi eyodwa ingu-20km phakathi kuka -8db no -15db;futhi imodi eyodwa ingu-60km iphakathi kuka -5db no -12db phakathi.Kodwa uma amandla akhanyayo e-fiber optic transceiver evela phakathi kwe--30db ne--45db, khona-ke kungenzeka kakhulu ukuthi le-fiber optic transceiver inenkinga.
Ungahlulela kanjani ukuthi kunenkinga nge-fiber optic transceiver?
(1) Okokuqala, bona ukuthi isibani senkomba se-optical fibre transceiver noma imojuli yokubona kanye nesibani sesikhombi sembobo ephothiweyo kuvuliwe.
a.Uma inkomba ye-FX ye-transceiver icishiwe, sicela uqinisekise ukuthi isixhumanisi sefayibha sixhumene yini?Umkhawulo owodwa we-fiber jumper uxhunywe ngokuhambisana;omunye umkhawulo uxhumeke kumodi yesiphambano.
b.Uma inkomba ye-optical port (FX) ye-A transceiver ivuliwe futhi inkomba ye-optical port (FX) ye-transceiver B icishiwe, iphutha lisohlangothini lwe-A transceiver: okunye okungenzeka ukuthi: I-transceiver (TX) transceiver optical imbobo yimbi ngoba imbobo yokubona (RX) ye-transceiver B ayitholi isignali yokubona;okunye okungenzeka ukuthi: kunenkinga ngalesi sixhumanisi se-fiber se-optical transmission port ye-A transceiver (TX) (ikhebula le-optical noma i-jumper optical ingase iphuke).
c.Isikhombi se-twisted pair (TP) sivaliwe.Sicela wenze isiqiniseko sokuthi uxhumo olusontekile alulungile noma uxhumo alulungile?Sicela usebenzise isihloli sokuqhubeka ukuze uhlole (nokho, amalambu ezinkomba ezisontekile zamanye ama-transceivers kufanele alinde kuze kuxhunywe isixhumanisi sefayibha).
d.Amanye ama-transceivers anezimbobo ezimbili ze-RJ45: (I-ToHUB) ibonisa ukuthi umugqa wokuxhuma ekushintsheni umugqa oqondile;(I-ToNode) ikhombisa ukuthi ulayini oxhumayo ekushintsheni uwumugqa we-crossover.
e.Ezinye izinwele zezinwele zine-MPR switch ohlangothini: kusho ukuthi umugqa wokuxhuma ekushintsheni umugqa oqondile;Iswishi ye-DTE: ulayini wokuxhuma ekushintsheni uyimodi yokuphambana.
(2) Ukuthi ikhebuli yokubona kanye ne-optical fibre jumper iphukile yini
a.Uxhumo lwekhebula elibonakalayo kanye nokutholwa kokunqanyulwa: sebenzisa ithoshi le-laser, ukukhanya kwelanga, umzimba okhanyayo ukuze ukhanyise umkhawulo owodwa wesixhumi sekhebula le-optical noma ukuhlanganisa;ubone ukuthi kukhona yini ukukhanya okubonakalayo ngakolunye uhlangothi?Uma kukhona ukukhanya okubonakalayo, kubonisa ukuthi ikhebula le-optical aliphukile.
b.Ukutholwa kokucisha kokuxhumeka kwe-fiber optical: sebenzisa i-laser flashlight, ukukhanya kwelanga, njll. ukuze ukhanyise umkhawulo owodwa we-fiber jumper;ubone ukuthi kukhona ukukhanya okubonakalayo ngakolunye uhlangothi?Uma kukhona ukukhanya okubonakalayo, i-fiber jumper ayiphukile.
(3) Ukuthi imodi ye-duplex enguhhafu/egcwele ayilungile yini
Amanye ama-transceivers anokushintsha kwe-FDX ohlangothini: i-duplex egcwele;Ukushintsha kwe-HDX: i-half duplex.
(4) Hlola imitha yamandla optical
Amandla akhanyayo we-fiber optical transceiver noma imodyuli ye-optical ngaphansi kwezimo ezijwayelekile: imodi eminingi: phakathi kwe--10db ne--18db;imodi eyodwa 20 amakhilomitha: phakathi -8db kanye -15db;imodi eyodwa 60 amakhilomitha: phakathi -5db kanye -12db;Uma amandla akhanyayo we-fiber optic transceiver ephakathi kwe -30db-45db, khona-ke kungahlulelwa ukuthi kunenkinga ngale fiber optic transceiver.