Nyob zoo, nyeem.Hauv tsab xov xwm no kuv yuav tham txog OSI-Data Link Layer Error Control nrog kev piav qhia.Cia peb pib…
Rau kev nkag siab txog kev sib kis ntawm cov ntaub ntawv txuas txheej cia peb ua piv txwv, yog tias A ntaus ntawv xav tau kev sib txuas lus nrog B ntaus ntawv, yuav tsum muaj kev sib txuas lus thiab cov khoom siv ntau yam.Yog hais tias tag nrho cov kab kev sib txuas lus tsis muaj qhov yuam kev tswj mechanism, ces tsuas yog cov ntaub ntawv xa los ntawm A yuav raug xa los ntawm B. Yog hais tias muaj ib tug yuam kev tswj mechanism ntawm cov kev sib txuas lus kab, cov ntaub ntawv xa los ntawm A mus rau B yuav raug kuaj raws li ib tug yuam kev. yuam kev ntawm lub cuab yeej ze rau A, thiab A yuav tsum tau xa rov qab, thiab cov ntaub ntawv raug xa tuaj ua ntej.Yog tias nws raug xa mus rau sab B, ces tag nrho cov kab tuaj yeem txuag tau cov peev txheej, uas yog qhov yuam kev tswj cov txheej txheem ntawm cov ntaub ntawv txheej.
Kev tswj qhov yuam kev ntawm cov ntaub ntawv txuas txheej feem ntau yog tsom rau me ntsis yuam kev ntawm qhov txuas.Feem ntau muaj ob txoj hauv kev tswj hwm, uas tau muab faib ua qhov yuam kev nrhiav kom tau coding thiab qhov yuam kev kho coding.Kev tshawb nrhiav yuam kev coding suav nrog parity thiab cyclic redundancy CRC, thaum kev ua yuam kev kho coding suav nrog Hamming code.
Cov coding thiab modulation ntawm qhov txuas txheej thiab lub cev txheej yog txawv.Lub cev txheej yog rau ib qho me ntsis los daws qhov teeb meem ntawm me ntsis synchronization hauv cov txheej txheem sib kis, xws li Manchester coding.Lub coding ntawm cov ntaub ntawv txuas txheej yog tsom rau ib txheej ntawm cov ntaub ntawv me ntsis, thiab nws paub txog qhov yuam kev tsim tswj ntawm cov txheej txheem ntawm cov ntaub ntawv binary me ntsis hauv cov txheej txheem sib kis los ntawm kev siv thev naus laus zis ntawm cov lej redundancy.
Cov saum toj no yog cov lus piav qhia ntawm "OSI-Data Link Layer-Yuam Kev Tswj" coj los ntawm Shenzhen Shenzhen HDV photoelectric Technology Co., Ltd. Cov khoom sib txuas lus tsim los ntawm lub tuam txhab npog;Module qeb:optical fiber modules, Ethernet modules, optical fiber ntau transceiver modules, optical fiber nkag modules, SSFP optical modules, thiabSFP optical fibers, lwm.
ONU qeb: EPON UA, AC ONU, Optical fiber ntau ONU, CATV UA, GPON UA, XOV TOOJ, lwm.
OLT chav kawm: OLT hloov, GPON OLT, PEB OLT, kev sib txuas lus OLT, thiab lwm yam.
Cov khoom lag luam saum toj no tuaj yeem muab kev txhawb nqa rau cov xwm txheej sib txawv.Pab neeg ua haujlwm R & D muaj zog thiab muaj zog tuaj yeem pab cov neeg siv khoom nrog cov teeb meem kev lag luam, thiab pab pawg ua lag luam muaj kev xav thiab kev ua haujlwm tuaj yeem pab cov neeg siv khoom tau txais kev pabcuam zoo thaum lub sijhawm sib tham ua ntej thiab ua haujlwm tom qab tsim khoom.Zoo siab txais tos koj tiv tauj peb
