CDMA, iyo inomiririra Code Division Multiple Access , inoshandiswa pakukwikwidza foni teknolojia yepamusoro kune GSM , iyo inoshandiswa zvikuru pasi pose inoshandisa foni .
Iwe unogona kunge wakanzwa nezvemazwi aya paunoudzwa kuti haugoni kushandisa imwe foni paunhare yako yefaira nekuti vari kushandisa utsi hwemhando dzakasiyana dzisina kufanana. Semuenzaniso, unogona kunge uri nefoni ye AT & T iyo isingashandisi paVerizon network nekuda kwechikonzero ichi.
Nhamba yeCDMA yakatanga kugadzirwa naQualcomm muUnited States uye inonyanya kushandiswa muU.S. uye zvikamu zveAsia nezvimwe vatakuri.
Ndeapi Makomba ari CDMA?
Pakati pematarenda mashanu anozivikanwa zvikuru, nhamo kuparara kwacho ndiko CDMA ne GSM:
CDMA:
- Sprint
- Verizon Wireless
- Virgin Mobile
GSM:
- T-Mobile
- AT & T
Mamwe Mashoko pamusoro peCDMA
CDMA inoshandisa nzira ye "spread-spectrum" iyo inokonzerwa nemagetsi emagetsi kuti ipe chiratidzo kune bhanwidth yakakura. Izvi zvinobvumira vanhu vazhinji pamatarefoni akawanda kuti vave "multiplexed" pamusoro pomutambo mumwechete kuti vagovere rutivi rwemafunguro emafunguro.
NeCDMA teknolojia, deta uye izwi mapaketi zvakaparadzana kuburikidza nematare uye zvino kuparidzirwa uchishandisa nzvimbo yakawanda yevheji. Sezvo pane imwe nzvimbo inowanzogoverwa deta neCDMA, mutemo uyu wakava wakakosha ye 3G yepamusoro-inotengesa kushandiswa kweIndaneti.
CDMA vs GSM
Vazhinji vashandisi vangave vasingadi kunetseka pamusoro peiyo foni yekambani yavanosarudza maererano nekombiji yekombiyuta iri nani. Zvisinei, pane zvimwe zvakasiyana-siyana zvatinotarisa pano.
Coverage
Kunyange zvazvo CDMA neGMM vachikwikwidza musoro maererano nepamusoro-soro bandwidth speed, GSM inowedzera kupararira kwepasi pose nekuda kwekufamba-famba uye kushambadzira kwenyika dzose.
GSM teknolojia inotanga kuvhara nzvimbo dzemaruwa muUnited States zvakakwana kudarika CDMA. Nokufamba kwenguva, CDMA yakakunda kutsika kweTDMA ( Time Division Multiple Access ) teknolojia, iyo yakabatanidzwa muGMM yakawedzerwa.
Chibvumirano Chekushandisa uye SIM Makadhi
Zviri nyore chaizvo kutengesa mafoni pane GSM network neCDMA. Izvi ndezvokuti GSM mafoni anoshandisa SIM card inobviswa kuchengetedza ruzivo pamusoro pemushandisi pane network GSM, nepo maCDMA asingatendi. Pane kudaro, mitambo yeCMAMA inoshandisa ruzivo pamusoro pechipandeti chetachiona chetachiona kuti uone imwechete ye data iyo GSM mafoni akachengetwa mu SIM card dzavo.
Izvi zvinoreva kuti SIM SIM makambani anonyanya kushandiswa. Nemuenzaniso, kana uri pane network ye AT & T, saka saka une AT & T SIM kadhi pafoni yako, unogona kuibvisa uye kuiisa mune imwe foni yefoni, seT-Mobile phone, kutumira mashoko ako ose ekubhadhara pamusoro , kusanganisira nhamba yako yefoni.
Izvo izvi zvinobudirira zvinokubvumira kushandisa T-Mobile foni pa network AT & T.
Kuchinja kwakajeka kwakadaro hakugoneki neine maCDMA akawanda, kunyange kana vane SIM card inobviswa. Pane kudaro, iwe unowanzodikanwa nemutakuri wako kubvumidza kuita shanduko yakadaro.
Sezvo GSM neCDMA zvisingawirirane, haugoni kushandisa Sprint foni paT-Mobile network, kana kuti Verizon Wireless foni neAt & T. Izvo zvinoenda kune imwe sanganiswa yezvipfeti uye mutakuri iwe unogona kuita kubva pane CDMA ne GSM urongwa kubva kumusoro.
Zano: CDMA foni dzinoshandisa SIM kadi dzinoita nokuti nekuda kweiyo LTE inoda iyo kana kuti foni ine SIM slot kugamuchira dzimwe nyika mitambo. Avo vanotakura, zvisinei, vachiri kushandisa teknolojia yeCDMA kuchengetedza ruzivo rwekubhadhara.
Kushandiswa kweMamwe Mashoko neDhiyabhorosi
Mazhinji maCMA networks haabvumiri kutumidzwa kwezwi uye data panguva imwe chete. Ichi ndicho chikonzero iwe unogona kuputirwa nemaeils nezvimwe zviziviso zvepaIndaneti paunopedza foni kubva kunhare yeCDMA seVerizon. Iyo data inonyanya kumira apo iwe uri pafoni.
Zvisinei, iwe uchacherechedza kuti mamiriro ezvinhu akadaro anoshanda zvakanaka apo iwe uri pfoni mukati memhando ye wifi network nokuti wifi, netsanangudzo, haisi kushandisa mutakuri webato.