Kodhi yekuona kukanganisa (parity check code): parity check code ine n-1 bit information unit uye 1 bit check element. Iyo N-1 bit information unit idata rinoshanda muruzivo rwatinotumira, uye 1-bit cheki unit inoshandiswa pakuona kukanganisa uye redundancy kodhi.
Odd check:kana nhamba ye1 munhevedzano ino yakaenzana, wedzera 1 pamberi payo, uye nhamba ye1 ikava isinganzwisisike, kana ukasadaro wedzera 0;
Kunyangwe cheki:kana nhamba ye1 munhevedzano iyi isinganzwisisike, wedzera 1 pamberi payo, uye nhamba ye1 ikava yakaenzana, ukasadaro wedzera 0;
Semuenzaniso: (1) 1111 odd cheki ndeye 11111 kunyangwe cheki iri 01111
(2) 1110 odd cheki i01110 kunyangwe cheki iri 11110
Hunhu hweparity cheki kodhi ndeyekuti inogona kungoona zvisinganzwisisike zvikanganiso, uye kukanganisa kwekuona kugona ndeye 50%, iyo isingagone kugadziriswa.
Kukanganisa kuona kodhi (CRC cyclic redundancy cheki kodhi): inzira yepolynomial division yekuona zvikanganiso. Imwe neimwe bhiti tambo inoonekwa sepolynomial, uye modulo-2 kushanda kunogamuchirwa.
Maitiro ekuverenga ekupedzisira ekutumira ndeaya: iyo data data inotumirwa + cheki kutevedzana kwe r bits, tora iyo data data kuti itumirwe, wobva waita modulo-2 kupatsanura neyakagadzirwa polynomial kutora yasara, inova FCS furemu cheki kutevedzana kuchawedzerwa.
Iyo yekuverengera maitiro ekupedzisira yekugamuchira ndeye: kana iyo yekugamuchira yekupedzisira inogamuchira furemu, inoita modulo-2 kupatsanura neyakagadzirwa polynomial, uyezve inotarisa yasara. Kana yasara iri 0, zvinoreva kuti nzira yekutapurirana yakajairika, uye yobva yagamuchira iyo data. Kana isiri 0, zvinoreva kuti nzira yekufambisa haina kujairika, uyezve inorasa iyo data.
Izvo zviri pamusoro ndiyo tsanangudzo yezivo ye "code yekuona kukanganisa" yakaunzwa neShenzhen HDV photoelectric Technology Co., Ltd.Zvigadzirwa zvekukurukurirana zvinobudiswa nekambani inovhara;
Zvikamu zvemodule: optical fiber modules, Ethernet modules, Optical fiber transceiver modules, Optical fiber access modules, SSFP Optical modules, uye SFP optical fibers, nezvimwewo.
ONUchikamu: EPON ONU, AC ONU, Optical fiber ONU, CATV ONU, GPON ONU, XPON ONU, nezvimwewo.
OLTkirasi: kuchinja OLT, GPON OLT, EPON OLT, kutauriranaOLT, nezvimwewo.
Izvo zviri pamusoro module zvigadzirwa zvinogona kupa rutsigiro kune akasiyana network mamiriro. Nyanzvi uye yakasimba R&D timu inogona kubatsira vatengi nenyaya dzehunyanzvi, uye timu inofunga uye ine hunyanzvi bhizinesi inogona kubatsira vatengi kuwana masevhisi emhando yepamusoro panguva yepamberi yekubvunzana uye mushure mekugadzira basa. Tinokugamuchirai taura nesu kune chero rudzi rwekubvunza.
