GSM, GPRS, EDGE, CDMA, UMTS, HSDPA - on the shelves

Question

Mobile Internet

Good day to all

I understand that from these abbreviations a complete mess in my head. I would like to ask you for help to put things in order and put everything on the shelves.

I understand that in the GSM network GPRS / EDGE (2G) and UMTS (3G) are used for data transmission.

What technology is used in CDMA networks for data transmission?

Is the voice transmitted only via GSM and CDMA or also via GPRS/EDGE(2G) and UMTS(3G)?

etc.

Answer 1

To the first question: 2G (GSM, GPRS, EDGE) and 3G (WCDMA, UMTS, HSPDA)
To the second: In CDMA (Code Division Multiple Access), the entire frequency spectrum is allocated to each node at all times. CDMA uses special codes to identify connections CDMA... For the
third, perhaps the article here will explain everything Generations of mobile telephony

Answer 2

Thanks,
I understand:
GSM: uses the GSM standard for voice transmission, and GPRS / EDGE and UMTS for data.
CDMA: uses EV-DO(3G) for both data and voice.
Correct me if I'm wrong.