Funda umehluko phakathi kwamazinga amakhulu omakhalekhukhwini
Ngenkathi ukhetha uhlelo lokusebenza lwezinsizakalo zeselula kwesiphathimandla sakho sokuzikhethela yisinqumo esibaluleke kakhulu, ngakho-ke ukhetha insizakalo yezinsizakalo zefoni yeselula kuqala. Uhlobo lobuchwepheshe othwala abasebenzisa lwenza umehluko uma uthenga iselula.
Lesi sihloko sihlukanisa umehluko phakathi kwamazinga wekhono lobuchwepheshe befoni le- GSM , EDGE , CDMA kanye ne- TDMA .
I-GSM vs. CDMA
Sekuyiminyaka, izinhlobo ezimbili ezinkulu zobuchwepheshe befoni ephathekayo-i-CDMA ne-GSM-ziyizimbangi ezingahambelani. Lokhu kungahambisani nesizathu samafoni amaningi we-AT & T angeke asebenze ngevisi ye-Verizon futhi ngokufanayo.
- Abahlinzeki benethiwekhi ye-GSM bafaka ulwazi lwekhasimende kwikhadi le-SIM elikhishiwe. Lokhu kwenza kube lula ukushintsha amafoni; uvele uthathe i-SIM khadi ngaphandle kwefoni yakho endala bese uyifaka ku-entsha yakho. Ubuchwepheshe be-GSM bugcwele eYurophu. Hlanganisa lelo qiniso ngefoni nge-SIM ekhishwayo, futhi unayo ifoni ongayisebenzisa ekuvakaseleni kwamanye amazwe ngokushintshwa kwe-SIM kuphela.
- Ama-CDMA amafoni angahle angenakho noma angaba namakhadi e-SIM, kepha ulwazi lomsebenzisi lugcinwa nomhlinzeki wesevisi, okumele unikeze imvume yakho ukushintsha amafoni. Ama-CDMA amafoni kufanele ahlelwe yibo bonke abathintekayo oyisebenzisayo. Noma nini uma ushintsha abathwali, ifoni kumele ihlelwe kabusha kulowo othwala-ngisho noma ifoni evuliwe.
Impumelelo Yezobuchwepheshe Ngenethiwekhi
Ikhwalithi yesevisi yefoni ayihlangene nobuchwepheshe umhlinzeki asebenzisa. Ikhwalithi incike kwinethiwekhi ngokwayo nokuthi umhlinzeki uyayifaka kanjani. Kukhona kokubili amanethiwekhi amahle futhi angewona amahle nge-GSM ne-CDMA yobuchwepheshe. Kungenzeka ukuthi ungene ekukhathazeni kwekhwalithi ngamanethiwekhi amancane kunezinkulu.
Kuthiwani Ngezingcingo Ezivuliwe?
Kusukela ngo-2015, bonke abathwali be-US badingekile ukuvula amafoni abo amakhasimende ngemuva kokugcwalisa isivumelwano sabo. Ngisho noma unquma ukuvula ifoni yakho noma ukuthenga ifoni entsha evuliwe , kungaba nge-GSM noma i-CDMA ifoni enhliziyweni, futhi ungayisebenzisa kuphela nabahlinzeki bemisebenzi ehambisanayo. Noma kunjalo, ukuba nefoni evuliwe kukunikeza uhla olubanzi lwabahlinzeki bezinsizakalo okufanele ukhethe kuzo. Awunqunyelwe kumunye owodwa.
01 ngo-04
Kuyini i-GSM?
I-GSM (I-Global System yezokuxhumana Zamaselula) yi-technology yomakhalekhukhwini esetshenziswa kabanzi kakhulu emhlabeni, ethandwa kakhulu kuma-US nakwamanye amazwe. Abathwali be-cellphone T-Mobile ne-AT & T, kanye nabahlinzeki abaningi beselula, basebenzisa i-GSM kumanethiwekhi abo.
I-GSM iyindlela yobuchwepheshe beselula ewuthandwa kakhulu e-US, kodwa nakakhulu nakwamanye amazwe. I-China, iRussia ne-India bonke banabasebenzisi abaningi be-GSM kune-US Kuyinto evamile kumanethiwekhi e-GSM ukuthi athole amalungiselelo amazwe angaphandle, okusho ukuthi amafoni e-GSM azinqumo ezifanele kwabangaphandle kwamanye amazwe. Okuningi "
02 ka 04
Iyini i-EDGE?
I-EDGE (Amanani Ezingqinamba Zedatha ye-GSM Evolution) ihamba ngokushesha kathathu kune-GSM futhi yakhiwe ku-GSM. Yenzelwe ukwamukela imidiya yokusakaza kumadivayisi eselula. I-AT & T ne-T-Mobile inezinethiwekhi ze-EDGE.
Amanye amagama wobuchwepheshe be-EDGE ahlanganisa i-GPRS eyengeziwe (i-EGPRS), i-IMT Single Carrier (IMT-SC) namanani okuthuthukiswa kwedatha we-Global Evolution. Okuningi "
03 ka 04
Yini i-CDMA?
I-CDMA (iCode Division Division Multiple ) ibambisana ne-GSM. I-Sprint, Virgin Mobile, ne- Verizon Wireless basebenzisa izinga lezobuchwepheshe be-CDMA e-US, njengabanye abahlinzeki bamaseli amancane.
Lapho amanethiwekhi we-3G CDMA, owaziwa nangokuthi "i-Evolution Data Optimized" noma "EV-DO" amanethiwekhi, aqala ukukhishwa, awakwazi ukudlulisa idatha nokwenza izingcingo zezwi ngesikhathi esifanayo. Ezimweni eziningi, ikakhulukazi nabahlinzeki bamaselula abanenethiwekhi ye-4G LTE, leyo nkinga iphethwe ngempumelelo. Okuningi "
04 ka 04
Kuyini i-TDMA?
I-TDMA (Isikhathi Sokuhlukaniswa Kwama Multiple Multiple), esandulela izinga eliphakeme kakhulu le-GSM technology, selifakwe ku-GSM. I-TDMA, eyayiyisistimu ye-2G, ayisasetshenziswa yizinkampani ezinkulu zezinsizakalo zefoni ze-US. Okuningi "