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Q.

What is the full form of CDMA. ,what is the diffeerence between GSM technology & CDMA.

Asked by sudeep mukherjee, 06 Apr '09 01:38 pm
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Answers (4)

1.

In cellular service there are two main competing network technologies: Global System for Mobile Communications (GSM) and Code Division Multiple Access (CDMA).
In cellular service there are two main competing network technologies: Global System for Mobile Communications (GSM) and Code Division Multiple Access (CDMA).
Subscriber Identity Module (SIM) cards: In the United States only GSM phones use SIM cards. The removable SIM card allows phones to be instantly activated, interchanged, swapped out and upgraded, all without carrier intervention. The SIM itself is tied to the network, rather than the actual phone. Phones that are card-enabled can be used with any GSM carrier.

The CDMA equivalent, a R-UIM card, is only available in parts of Asia but remains on the horizon for the U.S. market. CDMA carriers in the U.S. require proprietary handsets that are linked to one carrier only and are not card-enabled. To upgrade a CDMA phone, the carrier must deactivate the old phone then activ ...more
Answered by vivek singh, 06 Apr '09 01:46 pm

 
  
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2.

These are the two different means of mobile communication being presently used world wide. The basic difference lies in the Multiplexing method used in the airial communication i.e. from Mobile Tower to your mobile and vice versa...

CDMA uses Code Division Multiple Assess as the name itself indicates, for example you are in a hall occupied with number of people speaking different language. You will find that the one language you are knowing will be heard by you and the others will be treated like noise. In the same manner each CDMA mobile communication takes place with a "code" communicating between them and the other end if one is knowing that code then only it can listen to the data being transmitted i.e. the communication is in the coded form.

On the other hand GSM uses Frequency Division Multiplexing in which each user is allocated a particular bandwidth till the communication is taking place.
CDMA handsets do not use SIM cards. The handset is assigned a number from the tele ...more
Answered by dash, 06 Apr '09 01:45 pm

 
  
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3.

CDMA is by a service providerm such as Verizon, Sprint, AT&T, and so fourth. GSM is by a third-party service, so if your a big tech guy, you can basically create your own service. (which is very expensive. Hope this helps an good luck!
CDMA:

code division multiple access is one of the method in encrypt a code.like FDMA.

GSM:

GSM (Global System for Mobile communications: originally from Groupe Spcial Mobile) is the most popular standard for mobile phones in the world. Its promoter, the GSM Association, estimates that 80% of the global mobile market uses the standard.[1] GSM is used by over 3 billion people across more than 212 countries and territories.[2][3] Its ubiquity makes international roaming very common between mobile phone operators, enabling subscribers to use their phones in many parts of the world. GSM differs from its predecessors in that both signaling and speech channels are digital, and thus is considered a second generation (2G) mobile phone system. This h ...more
Answered by Rabindranath Sahu, 06 Apr '09 01:43 pm

 
  
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4.

Gg
Answered by kashyap_m2008, 28 Jan '10 02:18 pm

 
  
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