Tej Yam Koj Yuav Tsum Tau Paub Txog Fiber Optic Modem
Cov fiber optic modem (lossis FOM), txuas cov khoom siv hluav taws xob xws li lub koos pij tawj mus rau lub network lossis Is Taws Nem, muab hluav taws xob rau kev kho qhov muag ntawm kev sib txuas lus hluav taws xob thiab cov ntaub ntawv xa hluav taws xob rau kev xa cov khoom siv tactical fiber optic cable sibtham.
Fiber Optic Modem Ua Haujlwm Li Cas?
Cov kab hluav taws xob fiber ntau tau txais cov khoom sib txuas lus tau hla cov kab hluav taws xob fiber ntau thiab hloov lawv rov mus rau lawv thawj daim qauv hluav taws xob rau kev xa mus tag nrho. Ua ke nrog cov khoom siv hluav taws xob fiber ntau optic cables, FOM muab lub ntsej muag ua kom ruaj khov, ruaj ntseg thiab yooj yim nthuav tawm cov khoom siv kho qhov muag.
Dab tsi yog qhov ntau qhov chaw siab tshaj plaws uas ib qhov fiber ntau kho qhov muag tuaj yeem mus?
Qhov chaw siab tshaj plaws uas modem tuaj yeem mus tau yog qhov sib txawv ntawm qhov txais kev nkag siab thiab hloov lub zog ntawm cov fiber ntau optic modem, muab faib los ntawm cov kis poob ntawm cov fiber ntau siv. Piv txwv li, qhov yooj yim ib hom OSD815 digital video system lub zog xa hluav taws xob muaj zog ntau dua -10dBm thiab nws lub zog txais txais zoo dua -29dBm yog li qhov sib txawv ntawm 19dB ntawm 1310nm tso cai ua haujlwm tsawg dua 45km. Nco ntsoov qhov no yuav yog qhov tsim tsis zoo heev vim tias tsis muaj kev pom zoo rau txoj kab txuas.
Fiber Ntau Optic Modem Siv Rau Dab Tsi?
Cov kab hluav taws xob fiber ntau siv nyob rau hauv cov ntaub ntawv sib txuas lus los txuas cov kev deb ntev ntawm cov ntaub ntawv siab. Cov kab hluav taws xob fiber ntau tshwj xeeb tshaj yog kev tiv thaiv hluav taws xob thiab yog li tsim nyog rau kev lag luam hnyav ib puag ncig. Lawv tuaj yeem xa cov ntaub ntawv txog li 12 Mbit / s dhau mus deb li 80 km nyob ntawm seb hom fiber ntau. Lawv khwv yees los ntawm cov cuab yeej siv yooj yim nrog tsuas yog ob peb lub ports rau multiplexers uas muaj peev xwm tuav cov phiaj xwm kev sib txuas lus loj. Piv txwv, cov kab hluav taws xob fiber ntau tau siv los ntawm qee cov tes hauj lwm rau cov neeg rau zaub mov kom tsim kev sib txuas, thaum miv 7 cable yog siv rau cov xaim nyob hauv tsev. Txhawm rau hloov ob hom cable no koj xav tau lub ntsej muag fiber ntau.
Dab Tsi Yog Cov Muaj Hom Khoom Fiber Optic?
Cov kab ke fiber ntau yog qhov zoo tshaj plaws thaum ua haujlwm nrog cov ntau ntawm cov ntaub ntawv. Cov iav fiber ntau tso cai rau cov ntaub ntawv kom hloov chaw sai thiab muaj txiaj ntsig. Muaj nyob rau hauv tib hom lossis multimode qauv, nws yog qhov tseem ceeb kom xaiv qhov zoo tshaj plaws rau koj cov kev xav tau.
E1 fiber ntau lub teeb tsa yog siv rau kev kho lub thav duab lossis daim phiaj tsis txuas E1 cov ntaub ntawv teeb liab ncaj qha mus rau ib hom lossis multimode optical fiber rau kis tau los ntawm cov kab hluav taws xob optic cable kab. Lwm qhov kawg ntawm kab thev naus laus zis, lub teeb liab kho qhov muag yog demodulated rau hauv kab taub lossis tsis txuas E1 cov ntaub ntawv teeb liab. E1 interface yuav txuas ncaj qha nrog E1 cuam tshuam ntawm cov duab thiab cov ntaub ntawv cov ntsiab lus lossis WAN cov chaw nres nkoj ntawm MUX, hloov thiab router rau lub siab ua haujlwm network teeb lossis LAN txuas.
V35 fiber ntau optic modem hloov V 35 hluav taws xob teeb liab rau hauv cov ntaub ntawv kho qhov muag rau kev thauj mus los ntawm ntau hom lossis ntau hom fiber ntau optic cable. Thaum rov qab kawg ntawm cov kab hluav taws xob, cov kwj deg hluav taws xob tau hloov rov qab mus ua hluav taws xob cov cim ntawm qhov tsim nyog xws li G.703 & V.35. Cov paib fiber ntau kho qhov sib kis tau kom deb tshaj qhov ntau dua 100Km. Cov kab hom ntawm MOD-V.35 yog thav duab / unframed rau E1, yog li nws tuaj yeem siv los xa E1 teeb liab ntawm tus ncej video lossis duab unframed.
RS232 tus hloov pauv, RS485 tus hloov pauv thiab RS422 hloov pauv (RS txhais tau hais tias "tus qauv pom zoo") yog cov qauv qhia los ntawm Lub Koom Haum Kev Lag Luam Electronics kom ntseeg tau cov lus sib kis ntawm cov khoom siv los ntawm cov tuam txhab sib txawv. RS232 Tus Qauv yog rau cov tib cov ntaub ntawv xa xov los ntawm ib lub xa mus rau ib tus txais ntawm cov ntaub ntawv qeeb (txog 20K khoom / thib ob) thiab luv mus. RS232 Ethernet converter yog siv dav raws li peb tuaj yeem pom lawv los ntawm cov rooj ua haujlwm hauv computer feem ntau. RS422 qhov hloov pauv yog tus qauv rau cov ntaub ntawv xa mus ntev dua thiab cov nqi siab dua Baud piv nrog RS232. R485 converter txheem ua tau raws li qhov yuav tsum tau muaj kev sib txuas lus sib txuas ntawm ntau tus neeg sib txuas lus, thiab tus qauv qhia meej txog 32 tus tsav tsheb thiab 32 tus neeg txais tos rau ntawm ib (2-xaim) npav.