I-ONUinkcazelo
I-ONU (i-Optical Network Unit) ibizwa ngokuba yiyunithi yenethiwekhi ye-optical kwaye yenye yezixhobo eziphambili kwi-fiber optical access network (FTTH).Ifumaneka ekupheleni komsebenzisi kwaye inoxanduva lokuguqula imiqondiso ye-optical ibe yimiqondiso yombane kunye nokucubungula iimpawu zombane kwiifomathi zothumelo lwedatha ukufikelela kwidatha yesantya esiphezulu kubasebenzisi.
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1.ONU imisebenzi yesixhobo
II-ONUisixhobo sinemisebenzi elandelayo:
Umsebenzi womzimba: Isixhobo se-ONU sinomsebenzi wokuguqula optical / umbane, onokuguqula uphawu olufunyenweyo lwe-optical kwisignali yombane, kwaye ngelo xesha uguqule umbane wombane kwi-optical signal yokudluliselwa.
Umsebenzi onengqondo: II-ONUisixhobo sinomsebenzi wokudibanisa, onokudibanisa imijelo yedatha enesantya esisezantsi sabasebenzisi abaninzi kumjelo wedatha onesantya esiphezulu.Kananjalo inomsebenzi wokuguqulwa kweprotocol, enokuguqula umlambo wedatha kwifomathi yeprotocol efanelekileyo yokuhanjiswa.
Iprotocol ye-2.ONU
I-ONUizixhobo zixhasa iiprothokholi ezininzi, kubandakanya i-Ethernet protocol, i-IP protocol, iprothokholi yomaleko womzimba, njl., ngolu hlobo lulandelayo:
Iprotocol ye-Ethernet: Izixhobo ze-ONU zixhasa iprotocol ye-Ethernet kwaye inokuqonda i-encapsulation yedatha, ukuhanjiswa kunye ne-decapsulation.
Iprotocol ye-IP: Izixhobo ze-ONU zixhasa iprotocol ye-IP kwaye inokuqonda i-encapsulation yedatha, ukuhanjiswa kunye nokuchithwa.
Iprothokholi ye-Physical layer: Isixhobo se-ONU sixhasa iintlobo ngeentlobo zeeprothokholi zomaleko womzimba, njengeEPON, GPON, njl., ezinokuqonda ukuhanjiswa kunye nokumodareyithwa kunye nokunciphisa iimpawu ze-optical signals.
3.ONU inkqubo yobhaliso
Inkqubo yokubhaliswa kwezixhobo ze-ONU ibandakanya ukubhaliswa kokuqala, ukubhaliswa kwamaxesha athile, ukuphatha ngaphandle, njl., ngolu hlobo lulandelayo:
Ubhaliso lokuqala: Xa isixhobo se-ONU sivuliwe kwaye siqalisiwe, siya kuqaliswa kwaye sibhaliswe ngeOLT(Optical Line Terminal) isixhobo ukugqiba ukuzivavanya kunye noqwalaselo lweparameter yesixhobo.
Ukubhaliswa kwamaxesha: Ngexesha lokusebenza okuqhelekileyo, isixhobo se-ONU siya kuthumela izicelo zobhaliso ngamaxesha athile kwisixhobo se-OLT ukugcina unxibelelwano lonxibelelwano kunye nesixhobo se-OLT.
Ukuphatha ngokuKhethiweyo: Xa isixhobo se-ONU sibona imeko engaqhelekanga, njengokusilela kwenethiwekhi, ukusilela kwekhonkco, njl. njl., iyakuthumela ulwazi lwe-alamOLTisixhobo ukuququzelela iingxaki ngexesha.
I-4.ONU indlela yokudlulisa idatha
Iindlela zokuhanjiswa kwedatha yezixhobo ze-ONU zibandakanya ukuhanjiswa kwe-analog kunye neempawu zedijithali kunye nokumodareyitha komqondiso kunye nokunciphisa, ngolu hlobo lulandelayo:
Ukuhanjiswa kwesignali ye-analog: Isixhobo se-ONU sithumela i-audio yomsebenzisi, ividiyo kunye nezinye iinkcukacha ze-analog kwisixhobo sokuphela komsebenzisi ngokusebenzisa ukuhanjiswa kwesignali ye-analog.
Ukuhanjiswa komqondiso weDijithali: Isixhobo se-ONU sithumela idatha yedijithali yomsebenzisi kwisixhobo somthengi ngokusasaza umqondiso wedijithali.Imiqondiso yedijithali kufuneka ifakwe kwikhowudi phambi kokuba idluliselwe.Iindlela eziqhelekileyo zekhowudi ziquka ikhowudi ye-ASCII, ikhowudi yokubini, njl.
Ukumodareyithwa komqondiso kunye nokuchithwa kweempawu: Ngethuba lenkqubo yokuhanjiswa kweempawu zedijithali, izixhobo ze-ONU zifuna ukulungelelanisa izibonakaliso zedijithali kwaye ziguqule iimpawu zedijithali kwiifomathi zesignali ezifanelekileyo ukuhanjiswa kwitshaneli, njengezakhelo zedatha ye-Ethernet.Kwangaxeshanye, isixhobo se-ONU sikwafuna ukuthomalalisa isiginali efunyenweyo kwaye siguqule isiginali ibuyele kwifomathi yesiginali yedijithali.
I-5.Intsebenziswano phakathi kwe-ONU kunye ne-OLT
Ukusebenzisana phakathi kwezixhobo ze-ONU kunye nezixhobo ze-OLT kubandakanya ukuhanjiswa kwedatha kunye nokulawulwa kwenombolo yolawulo, ngolu hlobo lulandelayo:
Ukudluliselwa kwedatha: Ukuhanjiswa kwedatha kuqhutyelwa phakathi kwezixhobo ze-ONU kunye nezixhobo ze-OLT ngeentambo ze-optical.Kwisalathiso esinyukayo, isixhobo se-ONU sithumela idatha yomsebenzisi kwisixhobo seOLT;kwicala elisezantsi, isixhobo seOLT sithumela idatha kwisixhobo se-ONU.
Ukusetyenzwa kwenombolo yokulawula: Ukuhanjiswa kwedatha ngolungelelwaniso kuqondwa phakathi kwesixhobo se-ONU kunye nesixhobo se-OLT ngokusetyenzwa kwenombolo yolawulo.Ulwazi lwenombolo yokulawula lubandakanya ulwazi lwewotshi, imiyalelo yokulawula, njl. Emva kokufumana ulwazi lwenombolo yokulawula, ifowuni ye-ONU iya kwenza imisebenzi ehambelanayo ngokwemiyalelo, njengokuthumela kunye nokufumana idatha, njl.
6.ONU ukugcinwa kunye nolawulo
Ukuze kuqinisekiswe ukusebenza okuqhelekileyo kwezixhobo ze-ONU, ulondolozo nolawulo luyafuneka, ngolu hlobo lulandelayo:
Ukusombulula ingxaki: Xa isixhobo se-ONU sisilela, ukucombulula ingxaki kufuneka kuqhutywe ngexesha elifanelekileyo.Iimpazamo eziqhelekileyo zibandakanya ukusilela kombane, ukungaphumeleli kwendlela yokubona, ukungaphumeleli kwenethiwekhi, njl. njl.
Ukulungiswa kweParameter: Ukuze kuqinisekiswe ukusebenza kwesixhobo kunye nokuzinza kwenethiwekhi, iiparamitha zesixhobo se-ONU kufuneka zilungiswe.Uhlengahlengiso lweParameter lubandakanya amandla okukhanya, ukuhambisa amandla, ukufumana uvakalelo, njl njl.
Ulawulo lokhuseleko: Ukuze kuqinisekiswe ukhuseleko lwenethiwekhi, izixhobo ze-ONU kufuneka zilawulwe ngokukhuselekileyo.Abasebenzi bolondolozo kufuneka bamisele iimvume zokusebenza zesixhobo, iiphasiwedi zolawulo, njl. njl., kwaye utshintshe amagama ayimfihlo rhoqo.Kwangaxeshanye, imingcipheko yokhuseleko njengohlaselo lwe-hacker kunye nosulelo lwentsholongwane kufuneka lukhuselwe.
Ngokuqwalasela ngokufanelekileyo kunye nokulawula i-firewall yenethiwekhi ye-ONU kunye nemisebenzi ye-encryption yedatha, ukhuseleko lomsebenzisi womnatha unokuphuculwa ngokufanelekileyo kunye nokuhlaselwa kwenethiwekhi kuthintelwe.Ngelixa uqinisekisa ukhuseleko lothungelwano, kufuneka unikele ingqalelo ekuhlaziyweni rhoqo imigaqo-nkqubo yokhuseleko ukujongana nezisongelo zothungelwano eziya zisiba nzima nezihlala zitshintsha.
Ixesha lokuposa: Sep-21-2023
