Matsatsing ana, mererong ea hajoale ea puisano ea marang-rang, li-transceivers tsa optical,li-transceivers tsa fiber ea optical, 'me li-modem tsa optical li ka boleloa hore li sebelisoa haholo le ho hlomphuoa haholo ke basebeletsi ba tšireletso. Joale, na ua tseba phapang lipakeng tsa tsena tse tharo tse Hlakileng?
Optical modem ke mofuta oa lisebelisoa tse tšoanang le modem ea baseband (modem ea digital). Phapang ho tloha ho baseband MODEM ke hore e hokahane le mohala o inehetseng oa optical fiber, e leng lets'oao la optical.
E sebelisoa bakeng sa phetoho ea lets'oao la photoelectric le protocol ea interface ho netweke ea sebaka se pharaletseng, le phihlellorouterke phihlello ea marang-rang sebakeng se pharaletseng. Transceiver ea photoelectric e sebelisa phetoho ea letšoao la photoelectric sebakeng sa marang-rang sa sebaka sa heno, empa ke phetoho ea pontšo feela, ntle le phetoho ea protocol ea interface.Ka kakaretso e sebelisoa sebaka se selelele sa marang-rang a campus 'me ha se tšoanelehe bakeng sa tikoloho eo ho eona. ho kentsoe likhoele tse sothehileng. E le ho hlakisa modem ea optical, transceiver ea photoelectric. Re hloka ho tsebisa tikoloho eo li sebelisoang ho eona.
Optical modem, e tsejoang hape e le single-port optical transceiver, ke sehlahisoa se etselitsoeng libaka tse khethehileng tsa basebelisi. E sebelisa li-fiber tsa optical bakeng sa E1 e le 'ngoe kapa V. 35 e le' ngoe kapa 10BaseT e le 'ngoe ea 10BaseT point-to-point optical transmission terminal. Joalo ka lisebelisoa tsa phetiso ea marang-rang ea lehae, sesebelisoa sena se loketse lisebelisoa tsa phetisetso ea optical fiber terminal ea seteishene sa setsi le lisebelisoa tsa mohala tse hiriloeng. Bakeng sa li-transceivers tsa optical tse ngata, hangata li bitsoa "transceivers optical". Bakeng sa li-transceivers tsa optical tsa single-port, hangata li sebelisoa ka lehlakoreng la basebelisi. Li sebetsa ka mokhoa o ts'oanang le MODEM ea baseband e sebelisoang hangata bakeng sa marang-rang a marang-rang a WAN. "Optical modem" le "Optical Network Unit".
Li-transceivers tsa optical ke lihlahisoa feela tsa puisano ea data. Lihlahisoa tsa sebele tsa optical transceiver li fapane, li na le thuso bakeng sa phetisetso ea thelevishene ea cable, tse ling bakeng sa phetiso ea mohala, tse molemo bakeng sa taolo ea indasteri, 'me tse ling li bile li kopanya "lentsoe, data, setšoantšo" le litšebeletso tse ling ho fihlella One.
Optical fiber transceiver e hlokomela phetoho ea lets'oao lipakeng tsa mofuta o le mong le fiber ea mefuta e mengata le para e sothehileng ho Ethernet. Optical fiber transceiver ke Ethernet phetiso ea mecha ea phatlalatso ea phetoho yuniti e fapanyetsanang sebaka se sekhuts'oane sothehileng matshwao a motlakase le matshwao a malelele a optical. Li-transceivers tsa optical li atisa ho sebelisoa libakeng tsa sebele tsa marang-rang moo likhoele tsa Ethernet li ke keng tsa koaheloa 'me ho lokela ho sebelisoa likhoele tsa optical ho atolosa sebaka sa phetisetso; ka nako e ts'oanang, ba thusa ho hokahanya mile ea ho qetela ea melapo ea optical fiber ho marang-rang a libaka tsa metse e meholo (ea theknoloji ea Ethernet) le likarolo tse ling tse ka ntle. Marang-rang le ’ona a phethile karolo e khōlō.
Ho ea ka lebelo, optical fiber transceiver e ka aroloa ka 10M e le 'ngoe, 100M optical fiber transceiver,10/100M transceiver ea fiber ea optical e feto-fetohangle 1000M optical fiber transceiver. Li-transceivers tsa 10M le 100M li sebetsa karolong ea 'mele,' me lihlahisoa tsa transceiver tse sebetsang sebakeng sena li fetisetsa data butle-butle. Mokhoa ona oa ho fetisa o na le melemo ea lebelo la ho fetisa ka potlako, sekhahla se phahameng sa ponaletso, tieho e tlaase, joalo-joalo, e molemo ka ho lumellana le botsitso, 'me e loketse ho sebelisoa lihokelong tse tsitsitseng.
10/100M optical fiber transceiver e sebetsa lera la khokahanyo ea data. Sebakeng sena, transceiver ea fiber ea optical e sebelisa mochine oa ho boloka-le-pele ho bala mohloli oa eona oa aterese ea MAC, aterese ea MAC ea moo e eang teng, le aterese ea MAC ea moo e eang teng bakeng sa pakete ka 'ngoe e amoheloang. Lintlha, pakete ea data e fetisetsoa kamora hore tlhahlobo ea CRC cyclic redundancy e phetheloe. Ntlha ea pele, e ka thibela liforeimi tse ling tse fosahetseng hore li se ke tsa ata marang-rang le ho nka lisebelisoa tsa bohlokoa tsa marang-rang. Ka nako e ts'oanang, e ka boela ea thibela tahlehelo ea pakete ea data ka lebaka la tšubuhlellano ea marang-rang.
Ho latela sebopeho, e ka aroloa ka mofuta oa "desktop optical fiber transceiver" le "rack type optical fiber transceiver". Desktop optical fiber transceiver e loketse mosebelisi a le mong, joalo ka ho kopana le uplink ea a le mongswitjhaka phasejeng. Li-transceivers tsa fiber optic tse kentsoeng ka rack li loketse ho kopanya batho ba bangata.
Ho ea ka fiber, e ka aroloa ka mefuta e mengata ea fiber transceiver le single-mode fiber transceiver. Ka lebaka la likhoele tse fapaneng tsa optical tse sebelisoang, sebaka sa phetiso ea transceiver se fapane. Sebaka se akaretsang sa phetisetso ea transceiver ea mefuta e mengata e pakeng tsa 2 kilometers le 5 kilometers, ha transceiver ea mofuta o le mong e ka koahela sebaka sa lik'hilomithara tse 20 ho isa ho tse 120. Ho lokela ho totobatsoa hore ka lebaka la phapang ea sebaka sa phetisetso, matla a ho fetisa, ho amohela kutloisiso le bolelele ba maqhubu a fiber optic transceiver ka boeona le eona e tla fapana. Matla a ho fetisa a 5km optical fiber transceiver hangata a pakeng tsa -20 ho -14db, 'me kutloisiso e amohelang ke -30db, e sebelisa leqhubu la 1310nm; ha matla a ho fetisa a 120 km optical fiber transceiver hangata a le pakeng tsa -5 ho 0dB, 'me kutloisiso e amohelang ke -38dB, e sebelisa 1550nm wavelength.
Ho ea ka palo ea likhoele tsa optical, e ka aroloa ka transceiver ea optical e le 'ngoe ea fiber.transceiver e nang le fiber tse peli. Fiber e le 'ngoe ke ho lemoha ho amohela le ho romela data ka fiber ea optical. Sehlahisoa sa mofuta ona se amohela theknoloji ea ho arola maqhubu a mangata, 'me boholo ba maqhubu a sebelisoang ke 1310nm le 1550nm. Ka lebaka la ts'ebeliso ea "wavelength division" multiplexing, lihlahisoa tse le 'ngoe tsa fiber transceiver hangata li na le tšobotsi ea ho fokotsa matšoao a maholo. Hona joale, boholo ba li-transceivers tsa fiber optic tse rekisoang ke lihlahisoa tse peli tsa fiber, tse batlang li hōlile le tse tsitsitseng.
Hantle, se ka holimo ke kenyelletso e mabapi le phapang pakeng tsa transceiver optical, optical fiber transceiver le modem optical. Ke tšepa hore e ka u thusa!