Sawubona, Bafundi. Kulesi sihloko ngizoxoxa nge-OSI-Data Link Layer Error Control ngencazelo. Asiqale...
Ukuze siqonde ukudluliswa kwesendlalelo sesixhumanisi sedatha ake sithathe isibonelo, uma idivayisi engu-A idinga ukuxhumana nedivayisi engu-B, isixhumanisi sokuxhumana nochungechunge lwamadivayisi kuyadingeka. Uma wonke ulayini wokuxhumana ungenayo indlela yokulawula iphutha, idatha ethunyelwe ngu-A kuphela ezothunyelwa ngu-B. Uma kukhona indlela yokulawula iphutha kulayini wokuxhumana, idatha ethunyelwe isuka ku-A iye ku-B izotholwa njenge iphutha kudivayisi eseduze no-A, futhi u-A udinga ukuthunyelwa futhi, futhi uhlaka lwedatha olulungile lungathunyelwa kuqala. Uma ithunyelwa ohlangothini lwe-B, khona-ke wonke umugqa ungagcina izinsiza, okuyindlela yokulawula iphutha lesendlalelo sedatha.
Ukulawulwa kwephutha kwesendlalelo sesixhumanisi sedatha kuhloswe kakhulu kumaphutha amancane kusixhumanisi. Ngokuyinhloko kunezindlela ezimbili zokulawula, ezihlukaniswe ngekhodi yokuthola amaphutha kanye nokubhalwa kwekhodi kokulungiswa kwamaphutha. Ukuthola ikhodi kwephutha kufaka phakathi i-CRC yokulingana nomjikelezo wokuphindaphinda, kuyilapho ukulungisa iphutha ikhodi kuhlanganisa nekhodi ye-Haming.
Ukubhala amakhodi nokuguquguquka kwesendlalelo sesixhumanisi nesendlalelo esibonakalayo kuhlukile. Isendlalelo esibonakalayo singesebhithi elilodwa ukuxazulula inkinga yokuvumelanisa kancane enqubweni yokudlulisela, njengokubhala ngekhodi kwe-Manchester. Ukubhala ngekhodi isendlalelo sesixhumanisi sedatha kuhloswe kusethi yedatha encane, futhi ibona ukulawulwa kokukhiqizwa kwephutha kwesethi yedatha yebhithi kanambambili enqubweni yokudlulisela ngobuchwepheshe bekhodi yokuphinda usebenzise kabusha.
Okungenhla yincazelo yolwazi "ye-OSI-Data Link Layer-Error Control" elethwa i-Shenzhen Shenzhen HDV photoelectric Technology Co., Ltd. Imikhiqizo yokuxhumana ekhiqizwa inkampani ihlanganisa;Izigaba zamamojula:amamojula we-fiber optical, Amamojula we-Ethernet, amamojula we-fiber optical transceiver, amamojula okufinyelela kwefiber optical, Amamojula we-SSFP optical, futhiImicu ye-Optical SFP, njll.
I-ONUisigaba: EPON ONU, AC ONU, i-fiber optical ONU, I-CATV ONU, I-GPON ONU, XPON ONU, njll.
OLTikilasi: Ukushintsha kwe-OLT, I-GPON OLT, I-EPON OLT, ukuxhumanaOLT, njll.
Imikhiqizo yemojula engenhla ingahlinzeka ngosekelo lwezimo zenethiwekhi ezahlukahlukene. Ithimba le-R&D elichwepheshile neliqinile lingasiza amakhasimende anezinkinga zobuchwepheshe, futhi ithimba lebhizinisi elicabangayo nelichwepheshile lingasiza amakhasimende ukuthi athole amasevisi ekhwalithi ephezulu ngesikhathi sokubonisana kwangaphambilini nomsebenzi wangemuva kokukhiqiza. Siyakwamukela ku Xhumana nathi
