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Architecture of 2G, 2.5G and 2.75G are same or different?

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Architecture of 2G, 2.5G and 2.75G are same or different?
posted Sep 26, 2016 by Bhagyashree R

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Its all different

2G stands for second generation primarily meaning GSM
2.5G primarily means GSM and GPRS, where GPRS is used for the data and GSM(2G) is used for voice
2.75G was used to refer to EDGE (Enhanced Data Rates for GSM Evolution) Networks

Look at the following link
http://tech.queryhome.com/51508/gsm-protocol-architecture
http://tech.queryhome.com/48690/gprs-protocol-stack
http://tech.queryhome.com/58610/gprs-and-umts-protocol-stacks

answer Sep 26, 2016 by Salil Agrawal
Thank you. Can you please share the link with architecture diagram?
I had created presentation "Hello World to LTE", you can see it, it gives a view of how technology evolved with respect g's
http://www.slideshare.net/SachidanandaSahu/lte-basics-38981573
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