I-2G Yenziwe Izici Ezidumile Kumakhalekhukhwini
Emhlabeni wamafoni, lapho yonke inkulumo ingu- 4G no- 5G , ungase ucabange ngobuchwepheshe be-2G okuningi, kodwa ngaphandle kwalokho, ungase ube "Gs" kamuva "njengo-3G, 4G noma u-5G" kamuva .
2G: Ekuqaleni
I-2G ibonisa ubuchwepheshe bokudijithali obungenawo weselula wesibili. Amanethiwekhi we-digital 2G aphelele athathe ubuchwepheshe be-analog 1G, obuvela ngawo-1980. Amanethiwekhi we-2G abone ukukhanya kokuqala kokudayiswa kosuku kumgangatho we- GSM . I-GSM, eyenza ukuzulazula kwamazwe ngamazwe kunokwenzeka, kuyisimiso se-global system yokuxhumana kweselula.
Ubuchwepheshe be-2G kwizinga le-GSM lusetshenziswe okokuqala ekusebenzeni kwezohwebo ngo-1991 eFinland nguRadiolinja, manje engxenyeni ka-Elisa, inkampani eyayaziwa ngawo-1990 njengeHelsinki Telephone Company.
Ubuchwepheshe beselula yesizukulwane sesibili noma ukuhlukanisa isikhathi isikhathi eside ukufinyelela ( TDMA ) noma ukuhlukanisa ikhodi ukufinyelela okuningi (CDMA).
Ukulanda nokulayisha ijubane ku-2G ubuchwepheshe beyi-236 Kbps. I-2G ingaphambi kwe-2.5G , ehlanganisa ubuchwepheshe be-2G ku- 3G .
Izinzuzo ze-2G Technology
Lapho i-2G isethelwe kumakhalekhukhwini, yanconywa ngezizathu eziningana. Isibonakaliso sayo se-digital esetshenziswa amandla amancane kune-analog esho ukuthi amabhethri eselula ahlala isikhathi eside. Ubuchwepheshe be-2G obungokwemvelo benza ukuthi kungenzeka ukufakwa kwe-SMS-umlayezo wombhalo omfushane futhi owaziwayo kakhulu-kanye nemilayezo ye-multimedia (MMS) nemibiko yezithombe. Ukubethelwa kwedijithali ye-2G kwengeze ubumfihlo kumakholi wezwi nedatha. Umamukeli ohlosiwe kuphela wocingo noma umbhalo angayithola noma ayifunde.
2G Ukungabi namandla
Ama-2G weselula adinga ukuthi izimpawu zedijithali ezinamandla zisebenze, ngakho-ke babengenakwenzeka ukusebenza ezindaweni zasemaphandleni noma ezincane.