Lub vev xaib fiber ntau kho qhov muag tau hais txog kev nkag mus rau lub network uas cov khoom sib kis tau yog fiber ntau.
Cov vev xaib kho qhov muag tau muab tso tawm tau rau ob pawg: kev sib txuas ntawm cov khoos phis tawm (AON, Optical, Network, Active) thiab passive optical networks (PON, Passive, Optical, Network).
Lub tshuab hluav taws xob sib txuas tau muab faib ua AON raws SDH thiab PDH raws AON, thiab passive optical network tuaj yeem faib ua Pbandband PON thiab broadband PON.
Vim hais tias qhov kis tau tus kab mob nruab nrab kho qhov muag siv yog siv cov khoom siv kho qhov muag, kho qhov muag tau raws li pawg neeg siv tswv yim, tuaj yeem muab faib ua FTTC optical nkag network (FTTC), FTTZ (fttz), FTTB (fiber rau lub tsev), FTTO (FTTO) thiab FTTH (FTTH), uas suav sau FTTx. FTTx tsis yog cov thev naus laus zis tshwj xeeb, tab sis theej qib kev nce qib lossis siv cov khoom siv hluav taws xob hauv cov xaib.
Nkag mus rau hauv tus qauv network
Peb txheej txheem kev tsim hluav taws xob xaib siv network yog FTTN, FTTC thiab FTTH. Nyob rau hauv tus txheej txheem ntawm kev tsim kho network, txhua tus qauv muaj nws daim ntawv thov zoo, thiab txhua tus qauv yog tus txuas txuas hauv kev hloov ntawm network mus rau kev pabcuam. Qhov txiaj ntsig ntawm FTTN yog tias nws thawb fiber ntau ntxiv mus rau hauv cov neeg siv khoom siv. Nws teeb tsa kev nkag mus rau cov txheej txheem uas muab cov suab, cov ntaub ntawv hais txog kev nrawm, thiab cov vis dis aus rau ntau tsev neeg tsis tas yuav rov tsim kho cov loops thiab cov network sib txuas. Raws li xav tau, ib lub tuaj yeem tuaj yeem ntxiv rau hauv cov kab hluav taws xob los muab qhov kev lag luam uas xav tau. Ua ntej tsiv cov fiber ntau rau ntawm ntug kev FTTC lossis tsev (FTTH) vim kev lag luam tsav los yog kev tsim kho lub network, FTTN yuav tsum superimposed thiab faib tshaj qhov qub tooj liab hlau network.
Qhov yuav tsum tau ua ua ntej ntawm lub network qauv no yog muab cov kev pabcuam cov ntaub ntawv dav dav thiab cov kev pabcuam video, thiab qhov kev ncua deb ntawm ntawm node thiab lub tsev yuav tsum tsis pub dhau 4000 txog 5000 ko taw. Cov nodes niaj hnub no feem ntau muaj cov kev pabcuam deb li 12000 ko taw. Yog li, txhua cheeb tsam muab kev pabcuam xav tau teeb tsa 3 txog 5 FTTN nodes.
FTTC muaj ntau qhov zoo dua FTTN. Thaum FTTC raug siv los tsim kho lub network tam sim no, qhov qeeb thiab cuam tshuam los ntawm kev xa xov cable tuaj yeem raug tshem tawm. Nws ua rau cov fiber ntau nkag mus rau cov neeg siv network, uas txo cov teeb meem hauv lub network thiab ua rau tsis zoo vim yog kev ua haujlwm. Tam sim no, FTTC yog cov muaj zog thiab xa tau siv network uas yuav hloov zuj zus mus rau FTTH tes hauj lwm yav tom ntej. Nws tseem yog cov phiaj xwm kev lag luam tsim kho hauv thaj chaw tshiab thiab cov chaw tsim kho tshiab.
Ib qho tsis txaus ntawm cov qauv hauv lub network no yog qhov xav tau los muab lub zog hluav taws xob rau cov khoom siv tooj liab hlau. Cov chaw taws teeb hluav taws xob nyob hauv qhov kawg ntawm cov chaw ua haujlwm tuaj yeem muab 50 rau 100 qhov chaw nyob ntawm cov khoos phis tawm ntawm txoj kab hluav taws xob hauv lub tshuab hluav taws xob, txhua qhov ntawm lub zog sib txuas ntawm tus nqi ib leeg los ntawm txoj kev nyob ntawm qhov chaw tau zoo heev thiab ntev ntev thaum lub zog yuav cuam tshuam rau tus neeg siv lub lag luam xav tau.
Raws li daim kawg ntawm cov tsev fiber ntau, FTTH tshem tawm cov chaw tooj hlau tooj liab tag nrho: chaw pub mov, hluav taws xob, thiab cov kab tuaj txog. Rau tag nrho cov kev siv broadband, tus qauv no yog cov txhim khu feem kev qha thiab kav ntev rau yav tom ntej. Nws tseem yuav tshem tawm tag nrho cov kev saib xyuas ua haujlwm yuav tsum muaj cov xaim tooj liab thiab ntev heev rau lub neej network. Qhov kev sib txuas kawg ntawm lub network yog cov neeg siv khoom siv thaj chaw. Hauv tus neeg siv lub tsev, lub network kom txuas lub cuab yeej tsim nyog los hloov cov bandwidth thiab cov ntaub ntawv ntws mus rau hauv cov kab xa video, cov ntaub ntawv pabcuam thiab cov kev pabcuam lub suab.
Cov kauj ruam rau kev nkag mus rau fiber ntau:
Tus neeg thov ntawm daim npav lossis cov router zoo tib yam, tus neeg txuas nrog txuas nrog photoelectric converter;
Tus neeg tau txais kev pab ntawm cov kho hluav taws xob photoelectric ncaj qha los ntawm cov khoom siv fiber ntau thiab fiber ntau los ntawm cov neeg siv txuas nrog rau cov chaw sib txuas ua ke thaj chaw ze ntawm lub network;
Thaum kawg los ntawm tus caj qaum network nkag mus rau ISP lub tuam txhab rau Is Taws Nem.
Kev siv tau ntawm cov khoom siv fiber ntau
Cov fiber ntau cov thev naus laus zis sib txawv muaj cov ntawv thov sib txawv.
Kev siv cov cuab yeej kho qhov muag tau tsim nyog rau cov chaw lag luam thiab cov tsev nrog cov xav tau bandwidth siab thiab kev tiv thaiv kev sib txuas lus siab. Nws kuj tseem tuaj yeem siv rau hauv ntu pub khoom noj thiab faib tawm kab ntawm kev sib koom tes thiab sib xyaw nrog lwm cov txheej txheem thev naus laus zis raws li wireless lossis tooj liab hlau kis.
ATM-PON tuaj yeem siv los daws kev nkag mus ntawm cov lag luam thiab cov neeg siv, thiab kuj daws tau qhov kev nkag mus ntawm cov neeg nyob hauv thaj chaw. Qee cov neeg ua haujlwm siv "ATM-PON xDSL" cov kev nkag mus tso khoom siv los daws cov chaw nyob lossis chaw lag luam thiab cov neeg siv dav.
PUB nqaim PON feem ntau yog rau cov neeg nyob hauv tsev, tab sis kuj tseem siv tau los daws qhov kev lag luam me thiab nruab nrab thiab cov neeg siv khoom siv.
Txuas ntxiv, PON cov kev pabcuam muaj ntau tsis tshaj 20 km, tab sis dhau los ntawm "active optical network passive optical network" hybrid network program, tuaj yeem ua rau qhov tsis muaj peev xwm no.
Fiber ntau hom nkag mus
Optical fiber nkag tau muab rau cov neeg siv muab 10Mbps, 100Mbps, 1000Mbps high-bandwidth, uas tuaj yeem txuas ncaj qha rau CHINANET pob txha caj qaum. Feem ntau rau cov lag luam pab pawg neeg siv thiab cov neeg txawj ntse nyob hauv LAN cov kev nkag tau zoo thiab INTERNET qhov chaw siab ceev hauv is taws nem.
