Kwintsimi yothungelwano lwe-broadband, iteknoloji ezimbini ezibalaseleyo ziye zaba ngabakhuphisana abaphambili ekuboneleleni ngeenkonzo ze-Intanethi ezikhawulezayo: i-EPON kunye ne-GPON. Ngelixa bobabini bebonelela ngokusebenza okufanayo, banomahluko owahlukileyo ofanele ukuphononongwa ukuze baqonde amandla abo kwaye bathathe isigqibo sokuba yeyiphi eyona ifanele iimfuno zakho.
EPON (I-Ethernet Passive Optical Network) kunye ne-GPON (i-Gigabit Passive Optical Network), zombini iindlela ezidumileyo zokusasaza i-intanethi ye-intanethi ye-intanethi kubasebenzisi abasebenzisa iteknoloji ye-fiber optic. Bayinxalenye ye-Passive Optical Network (PON) usapho lobuchwephesha; nangona kunjalo, ziyahluka kuyilo kunye nokusebenza.
Umahluko omkhulu phakathi kwe-EPON kunye ne-GPON lulawulo lwabo lokufikelela kwimidiya (MAC) umaleko. I-EPON isebenzisa i-Ethernet, iteknoloji efanayo esetyenziswa kwinethiwekhi yendawo yendawo (LAN) kunye nothungelwano lwendawo ebanzi (WAN). Ngokusebenzisa i-Ethernet, i-EPON ibonelela ngokuhambelana neenkqubo ezikhoyo ezisekelwe kwi-Ethernet, okwenza kube yinto eguquguqukayo kakhulu kubaqhubi benethiwekhi.GPON, ngakolunye uhlangothi, isebenzisa i-Asynchronous Transfer Mode (ATM) iteknoloji, endala kodwa isasetyenziswa ngokuqhelekileyo indlela yokudlulisa idatha. Inzuzo yokusebenzisa i-ATM kwinethiwekhi ye-GPON kukuba inokubonelela ngeenkonzo zokudlala kathathu (ilizwi, ividiyo kunye nedatha) kwi-platform ye-multiplexing, ngaloo ndlela iqinisekisa ukusetyenziswa ngokufanelekileyo kwe-bandwidth.
Omnye umahluko obalulekileyo kukuhamba kwezantya ezantsi kunye nezantya zothumelo. I-EPON ibonelela ngezantya ezilinganayo, okuthetha ukuba ukukhuphela kunye nezantya zokulayisha ziyafana. Ngokwahlukileyo, i-GPON isebenzisa i-asymmetric setup evumela isantya esiphezulu somlambo kunye nesantya esisezantsi. Eli nqaku lenza i-GPON ilungele izicelo ezifuna isantya sokukhuphela ngokukhawuleza, njengokusasazwa kwevidiyo kunye nokudluliselwa kwefayile enkulu. Ngokwahlukileyo, isantya esilingeneyo se-EPON senza ukuba ifaneleke ngakumbi kwizicelo ezixhomekeke kakhulu kwi-symmetrical data transmission, ezifana ne-video conferencing kunye neenkonzo zamafu.
Nangona zombini i-EPON kunye ne-GPON zixhasa i-fiber infrastructure efanayo, i-OLT yabo (i-Optical Line Terminal) kunye ne-ONT (i-Optical Network Terminal) iteknoloji yahlukile. I-GPON inokuxhasa inani elikhulu le-ONT nge-OLT nganye, iyenza ibe lukhetho lokuqala xa i-scalability iyinkxalabo. I-EPON, ngakolunye uhlangothi, inoluhlu olude, oluvumela abaqhubi benethiwekhi ukuba bandise unxibelelwano ngakumbi ukusuka kwiofisi ephakathi okanye indawo yokusabalalisa. Eli nqaku lenza i-EPON ibe luncedo ekugqumeni iindawo ezinkulu zejografi.
Ukusuka kumbono weendleko, i-EPON kunye ne-GPON ziyahluka ngokwemirhumo yokuseta yokuqala. Ngenxa yolwakhiwo olusekwe kwi-ATM, iGPON ifuna izixhobo ezintsonkothileyo nezixabisayo. Ngokwahlukileyo koko, i-EPON isebenzisa itekhnoloji ye-Ethernet, eyamkelwa ngokubanzi nengabizi kakhulu. Nangona kunjalo, kubalulekile ukuqaphela ukuba njengoko itekhnoloji iphucuka kwaye uninzi lwababoneleli bangena kwimarike, umsantsa weendleko phakathi kwezi zimbini iinketho uya ucutheka kancinci.
Isishwankathelo, zombini i-EPON kunye ne-GPON ziinketho ezisebenzayo zokubonelela ngesantya esiphezulu se-Intanethi. Ukuhambelana kwe-EPON kunye ne-Ethernet kunye nezantya ezilinganayo zenza ukuba kube nomtsalane kushishino kunye nezicelo zokuhlala ezifuna ukuhanjiswa kwedatha okulinganayo. Kwelinye icala, ukusetyenziswa kwe-GPON ye-ATM kunye nezantya ze-asymmetric kuyenza ibe lukhetho lokuqala lwezicelo ezifuna isantya sokukhuphela ngokukhawuleza. Ukuqonda umahluko phakathi kwe-EPON kunye ne-GPON kuya kunceda abaqhubi benethiwekhi kunye nabasebenzisi bokugqibela benze izigqibo ezinolwazi xa bekhetha iteknoloji ehambelana neemfuno zabo ezithile.
Ixesha lokuposa: Oct-19-2023