Moni, Owerenga. M'nkhaniyi ndikambirana za OSI-Data Link Layer Error Control ndikufotokozera. Tiyeni tiyambe…
Kuti timvetse kufala kwa wosanjikiza ulalo deta tiyeni titenge chitsanzo, ngati chipangizo A ayenera kulankhula ndi B chipangizo, ulalo kulankhulana ndi mndandanda wa zipangizo zofunika. Ngati njira yonse yolumikizirana ilibe njira yowongolera zolakwika, ndiye kuti data yokhayo yotumizidwa ndi A idzatumizidwa ndi B. Ngati pali njira yowongolera zolakwika pamzere wolumikizirana, deta yotumizidwa kuchokera ku A kupita ku B idzadziwika ngati cholakwika pa chipangizo chomwe chili pafupi ndi A, ndipo A iyenera kutumizidwanso, ndipo mawonekedwe olondola a data akhoza kutumizidwa kaye. Ngati itumizidwa ku mbali ya B, ndiye kuti mzere wonsewo ukhoza kusunga chuma, chomwe ndi njira yoyendetsera zolakwika za deta.
Kuwongolera zolakwika za kusanjika kwa ulalo wa data kumangoyang'ana zolakwika pang'ono pa ulalo. Pali makamaka njira ziwiri zowongolera, zomwe zimagawidwa m'makhodi ozindikira zolakwika ndikuwongolera zolakwika. Kuzindikira zolakwika kumaphatikizanso kufananiza ndi cyclic redundancy CRC, pomwe kukonza zolakwika kumaphatikizapo Hamming code.
Kulemba ndi kusintha kwa ulalo wosanjikiza ndi gawo lakuthupi ndizosiyana. Zosanjikiza zakuthupi ndi zapang'onopang'ono kuti athetse vuto la kulumikizana pang'ono pakufalitsa, monga Manchester coding. Kulembera kwa kusanjikiza kwa ulalo wa data kumangoyang'ana pa data pang'ono, ndipo kumazindikira kuwongolera kolakwika kwa seti ya data ya binary bit mu njira yopatsira kudzera muukadaulo wa code of redundancy.
Zomwe zili pamwambazi ndizofotokozera chidziwitso cha "OSI-Data Link Layer-Error Control" yobweretsedwa ndi Shenzhen Shenzhen HDV photoelectric Technology Co., Ltd. Zoyankhulana zopangidwa ndi kampani zimakwirira;Magawo a module:Optical fiber modules, Ethernet modules, Optical fiber transceiver modules, optical fiber access modules, SSFP Optical modules,ndiSFP kuwala ulusi, ndi zina.
ONUgulu: EPON ONU, AC ONU, Optical fiber ONU, CATV ONU, GPON ONU, XPON PA, ndi zina.
OLTkalasi: Kusintha kwa mtengo wa OLT, Mtengo wa GPON OLT, EPON OLT, kulankhulanaOLT, ndi zina.
Zomwe zili pamwambazi zitha kuthandizira pazochitika zosiyanasiyana zapaintaneti. Gulu la akatswiri komanso lamphamvu la R&D litha kuthandiza makasitomala omwe ali ndi zovuta zaukadaulo, ndipo gulu loganiza bwino komanso laukadaulo litha kuthandiza makasitomala kupeza ntchito zapamwamba panthawi yokambirana zisanachitike komanso pambuyo popanga. Takulandirani ku Lumikizanani nafe
