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What is the main difference between GSM & CDMA?
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Answer Posted / s.narsimha swamy
GSM uses 900,1800&1900 band Systems.in india we are using
900 and 1800 band Systems but in CDMA we are using only 900
band system.
in GSM 900 Band System
uplink is varied form 890 MHz to 915 MHz
Downlink is Varied from 935 MHz to 960 MHz
but in CDMA 900 Band System
uplink is varied form 824 MHz to 849 MHz
Downlink is Varied from 869 MHz to 894 MHz
and Radiation distance of CDMA is more high than GSM.
more money required for establish a CDMA tower than GSM
tower.
CDMA tower should generate a random code for every User,and
CDMA mobile also generate one random code ,if two random
codes are same than Synchronization is ha pend between BTS
&Mobile station
but ,in GSM we are not using this type of System,the BTS
should identify the MS by ISDN(International subscriber
Destination Number)
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