Tanthauzo la GSM (Global System for Mobile Communications)
GSM (kutchulidwa kuti gee-ess-em ) ndiyomwe imakonda kwambiri foni yam'manja , ndipo imagwiritsidwa ntchito padziko lonse lapansi, kotero mwinamwake munamva za izo mu nkhani ya mafoni a GSM ndi GSM, makamaka poyerekeza ndi CDMA .
GSM poyamba ankayimira Groupe Spécial Mobile koma tsopano ikutanthawuza Global System for Mobile communications.
Malinga ndi GSM Association (GSMA), yomwe ikuimira zofuna za makampani opanga zamalonda padziko lonse, zikuyesa kuti 80 peresenti ya dziko lapansi imagwiritsa ntchito luso la GSM poika mafoni opanda waya.
Kodi Mitundu Yotani ndi GSM?
Pano pali kuwonongeka kofulumira kwa othandizira ochepa chabe omwe amagwiritsa ntchito GSM kapena CDMA:
GSM:
- T-Mobile
- AT & T
- Indigo Wopanda
- Mabala a Pine
- TerreStar
UnlockedShop ili ndi mndandandanda wa ma GSM ku US.
CDMA:
- Sprint
- Verizon Wireless
- Virgin Mobile
GSM vs CDMA
Zolinga zothandiza ndi za tsiku ndi tsiku, GSM imapereka mwayi wogwiritsa ntchito makina opanga maulendo apadziko lonse kuposa ma teknoloji ena amtundu wa US ndipo amatha kugwiritsa ntchito foni kukhala "foni ya padziko lapansi." Ndizowonjezerani, zinthu zomwe zimangowonjezera mafoni ndi kugwiritsa ntchito deta pokhapokha ngati Ma GSM koma osati CDMA.
Otsitsa GSM akuyendetsa makampani ndi othandizira ena a GSM ndipo nthawi zambiri amatha kubisala kumidzi kusiyana ndi zotsutsana ndi CDMA, komanso nthawi zambiri popanda kuwongolera .
GSM imapindulanso makhadi a SIM osasinthika mosavuta. Mafoni a GSM amagwiritsira ntchito SIM khadi kuti asunge uthenga wanu (olembetsa) monga nambala yanu ya foni ndi deta zina zomwe zimatsimikizira kuti ndinu olembetsa kwa wonyamulirayo.
Izi zikutanthauza kuti mukhoza kuyika SIM khadi mufoni iliyonse ya GSM kuti mupitirize kuigwiritsa ntchito pa intaneti ndi mauthenga anu onse olembetsa (monga nambala yanu) kuti muimbire foni, mauthenga, ndi zina.
Ndi ma telefoni a CDMA, Sim SIM simungasungire zomwezo. Chidziwitso chanu chimangirizidwa ku intaneti ya CDMA osati foni. Izi zikutanthauza kusinthanitsa CDMA SIM makadi kuti "sungani" chipangizo chimodzimodzi. Inu m'malo mwake mukufunikira kuvomerezedwa kwa wonyamulira musanayambe kusintha / kusinthana zipangizo.
Mwachitsanzo, ngati mumagwiritsa ntchito T-Mobile, mungagwiritse ntchito foni ya AT & T pamtunda wa T-Mobile (kapena mosiyana) ngati mutayika SIM khadi ya T-Mobile mu chipangizo cha AT & T. Izi ndizothandiza kwambiri ngati foni yanu ya GSM yathyoka kapena mukufuna kuyesa foni ya mnzanu.
Kumbutsani, komabe, izi ndi zoona kwa mafoni a GSM pa intaneti ya GSM. CDMA si yofanana.
Chinthu chinanso choyenera kulingalira poyerekeza CDMA ndi GSM ndikuti ma GSM onse amawathandiza kupanga foni pomwe akugwiritsa ntchito deta. Izi zikutanthauza kuti mungathe kukhala kunja ndi pafupi ndi foni koma mugwiritseni ntchito mapu anu oyendetsa kapena kuyang'ana pa intaneti. Ulamuliro woterewu sungathandizidwe pa ma CDMA ambiri.
Onani ma CDMA athu kuti mudziwe zambiri pa kusiyana kwa miyezo iyi.
Zambiri pa GSM
Chiyambi cha GSM chikhoza kuyambira mu 1982 pamene Groupe Spécial Mobile (GSM) inakhazikitsidwa ndi European Conference of Postal and Telecommunications Administration (CEPT) pofuna cholinga chopanga zipangizo zamakono zamagetsi.
GSM siidayambe kugulitsidwa mpaka 1991, kumene idamangidwa pogwiritsa ntchito teknoloji ya TDMA .
GSM imapereka mfundo zofanana monga kuyitana kwa foni, kutumizirana deta, ID ya oitana, kuyitanitsa, kuyitana, SMS, ndi kulankhulana.
Phulogalamu ya foni yam'manja imagwira ntchito mu gulu la 1900 MHz ku US ndi gulu la 900 MHz ku Ulaya ndi Asia. Deta imakanikizidwa ndikugwiritsidwa ntchito, ndikutumizidwa kudzera mumsewu womwe uli ndi mitsinje iwiri ya deta, aliyense amagwiritsa ntchito malo ake.