Kwicandelo leenethiwekhi ze-broadband, iiteknoloji ezimbini ezidumileyo ziye zaba ngabakhuphisana abaphambili ekuboneleleni ngeenkonzo ze-intanethi ezikhawulezayo: i-EPON kunye ne-GPON. Nangona zombini zibonelela ngokusebenza okufanayo, zineempawu ezahlukeneyo ezifanelekileyo ukuphononongwa ukuze kuqondwe amandla azo kwaye kugqitywe ukuba zeziphi ezifanelekileyo kwiimfuno zakho.
I-EPON (Ethernet Passive Optical Network) kunye neGPON (Gigabit Passive Optical Network), zombini ezi ndlela zidumileyo zokusasaza uqhagamshelo lwe-intanethi olukhawulezayo kubasebenzisi kusetyenziswa ubuchwepheshe be-fiber optic. Ziyinxalenye yosapho lwetekhnoloji yePassive Optical Network (PON); nangona kunjalo, zahlukile ngoyilo kunye nokusebenza.
Umahluko ophambili phakathi kwe-EPON kunye ne-GPON ngumaleko wabo wolawulo lokufikelela kwimidiya (MAC). I-EPON isebenzisa i-Ethernet, ubuchwepheshe obufanayo obusetyenziswa kwiinethiwekhi zendawo (LAN) nakwiinethiwekhi zendawo ebanzi (WAN). Ngokusebenzisa i-Ethernet, i-EPON ibonelela ngokuhambelana neenkqubo ezikhoyo ezisekelwe kwi-Ethernet, nto leyo eyenza ukuba ibe lukhetho oluguquguqukayo kakhulu kubaqhubi benethiwekhi.I-GPONKwelinye icala, isebenzisa iteknoloji ye-Asynchronous Transfer Mode (ATM), indlela endala kodwa esasetyenziswa kakhulu yokudlulisa idatha. Inzuzo yokusebenzisa i-ATM kwinethiwekhi ye-GPON kukuba inokubonelela ngeenkonzo zokudlala ezintathu (ilizwi, ividiyo kunye nedatha) kwiqonga le-split multiplexing, ngaloo ndlela iqinisekisa ukusetyenziswa ngokufanelekileyo kwe-bandwidth.
Omnye umahluko obalulekileyo sisantya sothumelo olusezantsi noluphezulu. I-EPON idla ngokunika isantya esilinganayo, oko kuthetha ukuba isantya sokukhuphela kunye nokulayisha ziyafana. Ngokwahlukileyo koko, i-GPON isebenzisa useto olungenamda oluvumela isantya esiphezulu esisezantsi kunye nesantya esiphantsi esisezantsi. Olu phawu lwenza i-GPON ifaneleke kwizicelo ezifuna isantya sokukhuphela esikhawulezayo, njengokusasazwa kwevidiyo kunye nokudluliselwa kweefayile ezinkulu. Ngokwahlukileyo koko, isantya esilinganayo se-EPON senza ukuba ifaneleke ngakumbi kwizicelo ezixhomekeke kakhulu kuthumelo lwedatha olulinganayo, njengeenkomfa zevidiyo kunye neenkonzo zelifu.
Nangona zombini i-EPON kunye ne-GPON zixhasa iziseko zefayibha ezifanayo, ubuchwepheshe bazo be-OLT (Optical Line Terminal) kunye ne-ONT (Optical Network Terminal) zahlukile. I-GPON inokuxhasa inani elikhulu le-ONTs nge-OLT nganye, nto leyo eyenza ukuba ibe lolona khetho lokuqala xa ukuguquguquka kuyinto exhalabisayo. I-EPON, kwelinye icala, inoluhlu olude, ivumela abaqhubi benethiwekhi ukuba bandise uqhagamshelo ukusuka kwiofisi ephakathi okanye kwindawo yokusasaza. Olu phawu lwenza i-EPON ibe luncedo ekugubungeleni iindawo ezinkulu zejografi.
Ngokwembono yeendleko, i-EPON kunye ne-GPON zahlukile ngokweentlawulo zokuqala zokuseta. Ngenxa yoyilo lwayo olusekelwe kwi-ATM, i-GPON ifuna izixhobo ezintsonkothileyo nezibizayo. Ngokwahlukileyo koko, i-EPON isebenzisa iteknoloji ye-Ethernet, eyamkelwe ngokubanzi kwaye ingabizi kakhulu. Nangona kunjalo, kubalulekile ukuqaphela ukuba njengoko iteknoloji iphucuka kwaye ababoneleli abaninzi bengena kwimarike, umsantsa weendleko phakathi kwezi ndlela zimbini uya uncipha kancinci kancinci.
Ngamafutshane, zombini i-EPON kunye ne-GPON ziindlela ezifanelekileyo zokubonelela ngoqhagamshelo lwe-intanethi olukhawulezayo. Ukuhambelana kwe-EPON ne-Ethernet kunye nesantya esilinganayo kwenza ukuba ibe nomtsalane kwii-apps zamashishini kunye neendawo zokuhlala ezifuna ukuhanjiswa kwedatha okulinganayo. Kwelinye icala, ukusetyenziswa kwe-ATM kunye nesantya esingafaniyo kwe-GPON kwenza kube lukhetho lokuqala kwii-apps ezifuna isantya sokukhuphela ngokukhawuleza. Ukuqonda umahluko phakathi kwe-EPON kunye ne-GPON kuya kunceda abaqhubi benethiwekhi kunye nabasebenzisi bokugqibela ukuba benze izigqibo ezinolwazi xa bekhetha iteknoloji ehambelana neemfuno zabo ezithile.
Ixesha lokuthumela: Okthobha-19-2023