Tsanangudzo ye GSM (Global System for Mobile Communications)
GSM (inonzi " gee-ess-em" ) ndiyo inonyanya kuzivikanwa foni , uye inoshandiswa munyika yose, saka iwe wakambonzwa nezvayo mumamiriro ekutengesa mafoni uye GSM mitanda, kunyanya kana ichienzaniswa neCDMA .
GSM pakutanga yaimirira Groupe Spécial Mobile asi ikozvino inoreva Global System ye Mobile communications.
Maererano neG GSM Association (GSMA), iyo inomiririra zvinodiwa nemabhizimisi ekutengeserana ehurumende pasi pose, inofungidzirwa kuti 80% yenyika inoshandisa teknolojia yeGMM painoisa masaisai asina mutsara.
Ndeapi Makomba ari GSM?
Heino kuparara nokukurumidza kwevatengesi vashoma vanofambisa uye vanoshandisa GSM kana CDMA:
GSM:
- T-Mobile
- AT & T
- Indigo Wireless
- Pine Cellular
- TerreStar
UnlockedShop ine pane yakanyatsorondedzerwa yeGMM mitanda muSouth America.
CDMA:
- Sprint
- Verizon Wireless
- Virgin Mobile
GSM vs CDMA
Nokuda kwezvinodiwa uye zvezuva nezuva, GSM inopa vashandisi zvakakura kune dzimwe nyika zvigadzirirwe kune dzimwe nzira dzeUnited States uye dzinogona kuita kuti foni ive "foni yenyika." Chii chinowedzera, zvinhu zvinoshandura nyore nyore foni uye kushandisa dhidhiyo pafoni iri kutsigirwa ne GSM mitambo asi kwete CDMA.
Vashandi veGMM vanotenderera zvibvumirano nevamwe vatakuri ve GSM uye vanowanzovhara nzvimbo dzekumaruwa zvakakwana kupfuura kukwikwidzana kwevatakuri veCDMA, uye kazhinji pasina kutengesa mhosva .
GSM inewo inobatsira yeSIM card inoshandiswa nyore nyore. GSM mafoni anoshandisa SIM card kuti uchengetedze (iwe mubhadhari) ruzivo rwakafanana nenhamba yako yefoni uye nedzimwe nheyo dzinoratidza kuti uri mubhaibheri kune uyo anotakura.
Izvi zvinoreva kuti iwe unogona kuisa SIM card mune chero ipi zvayo yefoni yeGMM kuti uenderere mberi nayo uchiishandisa paunetaneti nemashoko ako ose okutanga okubhadhara (kufanana nenhamba yako) kuti utone foni, zvinyorwa, nezvimwe.
NeCDMA mafoni, zvisinei, SIM card haina kuchengetedza mashoko akadaro. Unhu hwako husungirirwa kune network network yeCDMA uye kwete foni. Izvi zvinoreva kushandura CDMA SIM makadhi haiti "kushandura" iyo imwe nzira nenzira imwecheteyo. Iwe pane kudaro unoda kubvumirwa kubva kune anotakura usati wagona kushandura / kupatsanura zvishandiso.
Somuenzaniso, kana uri muT-Mobile, unogona kushandisa AT & T foni paT-Mobile network (kana kuti zvimwewo) chero bedzi iwe ukaisa SIM kadi yeT-Mobile muAt & T device. Izvi zvakanyanya kubatsira kana GSM yako yefoni yavhuniwa kana iwe uchida kuedza foni yemumwe wako.
Ramba uri mupfungwa, zvisinei, izvi izvi ndezvechokwadi kune mafoni e GSM pane GSM network. CDMA haina kufanana.
Chimwe chinhu chingafanira kuenzaniswa pakufananidza CDMA neGMM ndechokuti mapepa ose e GSM anotsigira kutumira foni pavanenge vachishandisa deta. Izvi zvinoreva kuti iwe unogona kunge uri kunze uye pamusoro pekufonera asi uchiri kushandisa mapepa ekutenderera kana kutarisa internet. Kukwanisa kwakadaro hakubatsirwi pane dzakawanda maCDMA.
Ona tsanangudzo yedu yeCDMA kune mamwe mashoko pamusoro pekusiyana pakati pemitemo iyi.
Mamwe Mashoko pamusoro pe GSM
Mhedzisiro ye GSM inogona kuteverwa shure muna 1982 apo Group Spécial Mobile (GSM) yakasikwa neEuropean Conference of Postal and Telecommunication Administration (CEPT) kuitira chinangwa chekugadzira purogiramu yepamusoro yeEuropean.
GSM haina kutanga kushandiswa mune zvekutengeswa kusvikira muna 1991, kwavakagadzirwa vachishandisa teknolojia yeTDMA .
GSM inopa zvikamu zvakadai sefoni inonzi encryption, kudetesa data, ID caller, kudhanyira, kudanidzira, SMS, uye kutaurirana.
Iyi teknolojia yefoni yefoni inoshanda mu 1900 MHz band muU.S. uye 900 MHz band muEurope neAsia. Dhiyabhorosi inomanikidzwa uye yakagadziridzwa, uye inotumirwa kuburikidza nemugwagwa ine mamwe magetsi maviri emvura, mumwe nomumwe achishandisa slot yake.