Iimodem zokudibanisa zinikezelwe kwiimodem eziphezulu ezikhawulezayo
I modem idivaysi ye-hardware evumela ikhomputha ukuba ithumele kwaye ifumane idatha malunga nomgca wefowuni okanye i-cable okanye i-satellite connection. Kwimeko yokudluliselwa komgca wocingo lwe-analog, owawuyindlela eyaziwayo kakhulu yokufikelela kwi-intanethi, i-modem iguqula idatha phakathi kweefomathi ze-analog kunye ne-digital ngexesha langempela kwi-network-way communication network. Kwimeko yeemodem zedijithali eziphezulu ezidumile namhlanje, uphawu lulula kwaye aludingi ukuguqulwa kwe-analog-to-digital.
Imbali yeModem
Iifowuni zokuqala ezibizwa ngokuba yiimodemu ziguqula idatha yedijithali yokudluliselwa kwiimizila zefoni ze-analog. Isantya sale modem sasiyilwa ngokwembali kwi-baud (iyunithi yokulinganisa egama lingu-Emile Baudot), nangona ubugcisa bekhompyutha buphuhlisiwe, le miqathango yaguqulwa yaba yi- bits ngesibini . Iimodem zokuqala zorhwebo zisekela isivini se-110 bps kwaye zazisetyenziswa yiSebe lezoKhuseleko lase-United States, iinkonzo zeendaba, kunye namanye amashishini amakhulu.
Iimodemu zaziqhelana nabaxhasi ekupheleni kwee-70s ukuya kuma-80s njengeebhodi zemiyalezo yoluntu kunye neenkonzo zeendaba ezifana neCompuServe zakhiwe kwiziseko zangaphambili ze-intanethi. Emva koko, ngokutshabalalisa kweWebhu yeWide yeWebhu phakathi neyekupheleni kwee-1990, iimodem zokudibanisa zavela njengeyona ndlela yokupasa kwi-intanethi kumakhaya amaninzi ehlabathini lonke.
Iimodemu zeDial-Up
Iimodemu zemveli ezisetyenziselwa kwiintanethi zokudibanisa ziguqula idatha phakathi kwefomu ye-analog esebenzisa imizila yefowuni kunye nefomati yefowuni esetyenziswa kwiikhomputha. I-modem yangaphandle yokufowunela ipakisha kwikhomputha ekupheleni komnye kunye nomgca wefowuni kwenye. Kwixesha elidlulileyo, abanye abenzi bekhompyutheni badibanisa iimodem zokudibanisa zangaphakathi kwiimveliso zabo zekhompyutha.
Iimodemu zee-intanethi zangoku-dial-up zithumela idatha kwizinga eliphezulu lama-56,000 bits ngesibini. Nangona kunjalo, ukulinganiselwa kweemfono zorhulumente ngokubanzi kunciphisa amaxabiso e-modem yedatha kwi-33.6 Kbps okanye ngaphantsi kokusebenza.
Xa udibanisa kwinethiwekhi ngokusebenzisa i-modem yokufowunela, izixhobo ngokuqhelekileyo zidlulisela kwisithethi izandi ezahlukileyo ezidalwe ngokuthumela idatha yedijithali phezu komgca wezwi. Ngenxa yokuba inkqubo yoxhumo kunye neepatheni zedata zifana njalo, ukuva umzekelo wesandi kunceda umsebenzisi ukuqinisekisa ukuba inkqubo yokuxhuma isebenza.
Modem Broadband
I- modem ebanzi yebhanki njengalezo ezisetyenzisiweyo kwi-DSL okanye ukufikelela kwi-intanethi isebenzise iindlela zokusayinisa eziphambili zokufikelela kwiimpawu zenethiwekhi eziphezulu kakhulu kuneemodem zokudityaniswa kwendabuko. Iimodem e-Broadband zibizwa ngokuba ziimodem eziphakamileyo. Iimodemu zamanqanaba zihlobo lweemodem yedijithali eyenza uxhumano lwe-intanethi phakathi kwesiselula kunye nenethwekhi yomnxeba .
Iimodemu zangaphandle zesebhanki zangaphandle zifake kwi- router yasekhaya okanye enye idivayisi yesango kwisango elilodwa kunye nomnatha-ntanethi wangaphandle we-intanethi njengomgca wekhebula kwenye. I-router okanye isango lilawula umqondiso kuzo zonke izixhobo kwishishini okanye kwikhaya njengoko kuyimfuneko. Ezinye ii-router routs ziquka i-modem edibeneyo njengeyunithi enye ye-hardware.
Abanikezeli abaninzi bee-intanethi ze-intanethi banikezela ngeekhompyutheni ezifanelekileyo zeemodem kubaxhasi babo ngaphandle kwentlawulo okanye ngenkokhelo yenyanga. Nangona kunjalo, iimodem eziqhelekileyo zingathengwa ngeentengiso zokuthengisa.