αៅα្αុααិαααោααើααាαេααα
្α
ុα្αα្ααេαា
α¬α៏α្αα័α្αααα់αូαα័α្ααាαα
ែαα
េααា 2 αំααឺ CDMA αិα GSM
α្αុααោះαាαααុα្ααាα
្αើααាαα
ោααាαំαួααា αើ CDMA
αឹααាα្αα័α្αα’្αី α
ុះ GSM αាα្αα័α្αα’្αីαែα?
αឿααេះαាαα្αើα’ោααើααឺα្αាααិααិα
αោះαេ αែαុំαាαα្αα៍α’ី
Cambo Report
αឹαα្αើαាαααα្αាαα្αាα់αៅαα់α្αិααិα្αα’ោααាαα្αាαα
្αាα់α’ំαី
α្αα័α្ααំααាំα 2 αាααើαូα
αាαα្αោα។
αាααាαិαាααα់αឿα CDMA αិα GSM αាαα ្αើααឺαាα’α្ααααួα αែααេαែααែαិαាααៅα―α្ααេααα ាα’ំαាα α’ាαេαិα α្αោះαៅαីαោះαឺαាα្αីααួα αែααាαα ំαួαα’្ααα្αើα្αាα់αូαα័α្ααោααាαα្αα័α្α CMDA α្αα់αាαាαα្αីαααៃαៀααើααααោα αីα―αៅα្αីαα’ាα៊ីαើααិα αាαα ំαួαα’្ααα្αើα្αាα់α្αα័α្α GSM α ំαួα 99% αៅα ើα α្αុααៅαិαα្αាααααាα្αាα់α្αើα្αាα់α្αα័α្α CDMA αោះαេ αើαោះαីαាαាαα៏αាαα ំαួααិα αួα αំαុα។ αាα្ααា CDMA αាααααីαាα្αα ៅαេααា Code Division Multiple Access αិα GSM αααីαាα្ααា Global System for Mobiles αោααាαាαα្ααα្αិαើαα‘ើααាαើααំαូαα ាα់αាំααីα្αាំ 1987 ααα៉្αេះ α ើααាααα្ααីααុះαាα αិαα្αើα្αាα់αីααុα្αα្αα់α្αីααាំαα’α់។
GSM αឺαាααាααាαα្αួαα្αើα្αាα់αាαាα CDMA αα្αាα់α្ααាαααα់αៅα្αុαα្αីαα’ាα៊ីα្αោះαាα់αូαα័α្αα្αើα្αាα់ α្αα័α្α GSM αាំαα’α់αα្αូαα’ោαα្αើα្αាα់α៊ីααាα α ើαα៊ីααាααោះαើαα្αូαα ុះα្αោះαិααីα្αុαα ៊ុαα្αាα់ αូα ្αេះαាα់αេαα α់α្αាα់α្αូααូαα័α្ααីαួαα៊េαីαៅαួαα៊េαី α’្ααα្αើα្αាα់αុំα ាំαាα ់αៅαα់α្αុαα ៊ុαα្αាα់α្αូαα្αោះ α¬αេααូαα’្αីαα៉េαα៉ៃα‘ើα។ α្α៉ាααិααៀααៅαេαα េααៅα្αៅα្ααេααឺαាα់αែαាαα្αួα αោαα’ាα αិαα៊ីααាααៅα្ααេααោះα ើααាα់α្αើα្αាα់α្αាαααែα្αα α ំαែαα―αេαា 4G-LTE α៏αាαα្αួααααែα α’ោααែαូαα័α្α αិαα៊ីααាααោះα’ាα α្αើα្αាα់αាα αឺα’ាα α្αើα្αាα់αាααាំαα’α់។
αាំαα’α់αេះαៅαិααាα់α’α់αៅα‘ើααោះαេ αើαិαាααៅαα់α្αែααα ្α េααិα្αាααα់α្αα័α្ααាំα 2 α’ោααាα់αែα៊ីαα្αៅαិααើααា αាαាααាααុαα្αែαα្αាαែααូα αាα្αα័α្α αុαα្αិαាα ααααិαាααα α ំαួαα្αើα្αាα់αាααេααិαααោα α’α្αាα្αេααិα្αα័α αិα αα្αិααិα្αុααα្α
αាαើα -α-។

αាααាαិαាααα់αឿα CDMA αិα GSM αាαα ្αើααឺαាα’α្ααααួα αែααេαែααែαិαាααៅα―α្ααេααα ាα’ំαាα α’ាαេαិα α្αោះαៅαីαោះαឺαាα្αីααួα αែααាαα ំαួαα’្ααα្αើα្αាα់αូαα័α្ααោααាαα្αα័α្α CMDA α្αα់αាαាαα្αីαααៃαៀααើααααោα αីα―αៅα្αីαα’ាα៊ីαើααិα αាαα ំαួαα’្ααα្αើα្αាα់α្αα័α្α GSM α ំαួα 99% αៅα ើα α្αុααៅαិαα្αាααααាα្αាα់α្αើα្αាα់α្αα័α្α CDMA αោះαេ αើαោះαីαាαាαα៏αាαα ំαួααិα αួα αំαុα។ αាα្ααា CDMA αាααααីαាα្αα ៅαេααា Code Division Multiple Access αិα GSM αααីαាα្ααា Global System for Mobiles αោααាαាαα្ααα្αិαើαα‘ើααាαើααំαូαα ាα់αាំααីα្αាំ 1987 ααα៉្αេះ α ើααាααα្ααីααុះαាα αិαα្αើα្αាα់αីααុα្αα្αα់α្αីααាំαα’α់។
GSM αឺαាααាααាαα្αួαα្αើα្αាα់αាαាα CDMA αα្αាα់α្ααាαααα់αៅα្αុαα្αីαα’ាα៊ីα្αោះαាα់αូαα័α្αα្αើα្αាα់ α្αα័α្α GSM αាំαα’α់αα្αូαα’ោαα្αើα្αាα់α៊ីααាα α ើαα៊ីααាααោះαើαα្αូαα ុះα្αោះαិααីα្αុαα ៊ុαα្αាα់ αូα ្αេះαាα់αេαα α់α្αាα់α្αូααូαα័α្ααីαួαα៊េαីαៅαួαα៊េαី α’្ααα្αើα្αាα់αុំα ាំαាα ់αៅαα់α្αុαα ៊ុαα្αាα់α្αូαα្αោះ α¬αេααូαα’្αីαα៉េαα៉ៃα‘ើα។ α្α៉ាααិααៀααៅαេαα េααៅα្αៅα្ααេααឺαាα់αែαាαα្αួα αោαα’ាα αិαα៊ីααាααៅα្ααេααោះα ើααាα់α្αើα្αាα់α្αាαααែα្αα α ំαែαα―αេαា 4G-LTE α៏αាαα្αួααααែα α’ោααែαូαα័α្α αិαα៊ីααាααោះα’ាα α្αើα្αាα់αាα αឺα’ាα α្αើα្αាα់αាααាំαα’α់។
αាំαα’α់αេះαៅαិααាα់α’α់αៅα‘ើααោះαេ αើαិαាααៅαα់α្αែααα ្α េααិα្αាααα់α្αα័α្ααាំα 2 α’ោααាα់αែα៊ីαα្αៅαិααើααា αាαាααាααុαα្αែαα្αាαែααូα αាα្αα័α្α αុαα្αិαាα ααααិαាααα α ំαួαα្αើα្αាα់αាααេααិαααោα α’α្αាα្αេααិα្αα័α αិα αα្αិααិα្αុααα្α
αាαើα -α-។
1. α្αα័α្ααុαα្αិαាα
ααាα CDMA αិα GSM α្αα័α្ααែααាααុαα្αិαាααាααេαោះαឺ CDMA
α្αោះαាα្αើα្αាα់αូαα្αេααα្αាαាំαα’α់αៅαα់α’្ααα្αើα្αាα់
αូα
្αេះαៅαេααាααឿαα’្αីαើαα‘ើα α¬αាααααាα្αាα់α
α់ Hack
αឺαិααាαិαាαα្αើαៅαាααាα់។ α ើααេαាααα់ CDMA α៏α្αាំααាαាα
GSM αααែα αើα្αិααៅα្αុααំαα់αោααេααៅαោααេαា។
2. ααααិαាααα
α្αα័α្α CMDA αាαααααិαាααα (Spectrum Frequencies) α្αឿα
850MHz αៅαα់ 1900MHz αីα― GSM α៏αាαα្αឿα 850MHz αα់ 1900MHz αូα
α្αា។
3. α
ំαួαα’្ααα្αើα្αាα់
αូα
α’្αីαែαα្αុំαាααៀααាαα្αាα់αាααើα’α្α
ឹα CDMA
αាαα’្ααα្αើα្αាα់α
្αើααែαៅα’ាαេαិα
α៉ុα្αោះ α្αោះα្αុαα ៊ុααំα 2
αាααα្ααាααៅαីαោះαូα
αា Sprint αិα Verizon αាαើα
αូα
្αេះα
ំαួαααុαααα់α’្ααα្αើα្αាα់ CDMA
αៅα្αុααិαααោααាαα
ំαួαα្αឹααែ 20% α៉ុα្αោះ αីα― GSM
αិααាαα
ំαួααα់αៅ 80% αោαα្αុααោះαាαα្ααេααាα 210
αាααំαុαα្αើα្αាα់α្αα័α្α GSM។
4. α’α្αាα្αេαិα្αα័α
α្αα័α្ααេαា CDMA αាαα្αឿαα្αα់αិα្αα័ααាααα ័ααាαាα GSM
αើαើαα្αើαាαα្αៀααៀαα្αា αោα CDMA α្αើα្αាα់αα
្α
េααិα្αា EVDO
αើα្αីαα្αូααិα្αα័ααាαα្αឿααα់αៅ 2 mbps α
ំαែα GSM
α្αើα្αាα់αα
្α
េααិα្αា EDGE αែααាαα្αឿαα្αα់αំαុαα្αឹααែ 384
kbps α៉ុα្αោះ។ αូα
្αេះαាα់αាαα្αើα្αាα់α’៊ីααឺαែα
αα្ααាαីαេα’ូα្αុααα្αិααូααាαα
្αាα់ α¬ Download αោះαឺ CDMA
αាαα្αឿαα៊ីαាα
់ GSM។
5. αα្αិααិα្αុααα្α
αα្αិααិα្αុααα្ααើααិαα’ាα
αើααើααឹαα្αែααោះαេ
α ើααាα៏αាααααិα្αុαែαα្αើα’ោαα៉ះαាα់αα់αុααាαααα់αើααααែα
α្αុααោះαោααោααាααាααិα្αាα្αាαα្αាααាααααើααាα្αα័α្α GSM
αាααα្αិααិα្αុααα្αα
្αើααាαាα CDMA αα់αៅ 28 ααα―αោះ។
α េαុαេះαα្αាα់α’្ααα្αើα្αាα់αូαα័α្α αេα្αេα
α¬α§αααα៍αែαα្αើα្αាα់α៊ីααាα
αឺα្αូααួαα្ααះαឹαααααិα្αុααα្αα
្αើα
αែαα’ាα
α៉ះαាα់αα់αុααាαα
្αើααាαាαα’្ααα្αើα្αាα់ CDMA។


