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Karthik R

Basics about CDMA / EVDO

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Thank you Karthik. Both your msg and the attachment are like reading text book giving the basics. A very useful effort by you.

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EVDO Rev A is Not Voice capable but surely it can support Voice over IP BUT the VoIP Support have never been rolled out later on 1x was Retained for Voice and EVDO only for Data so all current Handset Connect both 1x and EVDO Circuit Simultaneously

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Very nice info for Noobs

Thanks Kartik

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good info..

@hetal so i think on EvDO we can have data & voice call simultaneously.

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^

On Reliance EVDO, still there will be no data and voice simultaneously; But you will not miss any calls as data transfer will stop for the duration of the voice call...

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+1

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No EVDO Roll out in any part of world can carry Voice on it

EVDO = EVolution Data Only ||| and (EVDO+Voice) = EVDV (Evolution Data and Voice)

EVDV were never came from Table to Implementation

all world using EVDO only for Data and 1x for Voice

Just see the screen of Samsung Corby it show dual Cell Signals

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@Hetaldp

Does this mean that even if there is a Spectrum Auction sometime in future for CDMA EVDO (Which is being talked about quite often now).....

The additional spectrum can be utilized only for carrying EVDO Data and not voice...

What i mean to say is that will the voice quality in CDMA remain the same as today unlike in 3G GSM where technically one expect a better voice quality if you are on a 3G Voice+Data Plan?

And what about LTE network rollout by Verizon in U.S.? Is that also limited to High Speed Data with no Voice Carriage?

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CDMA EvDO kaa auction hoga kya?? major player, tata and reliance both have got 3G.. further reliance is in huge debt, so bidding again will cost them dear..

LTE = Long term evaluation read the details on wikipedia...

its more techie stuff...

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No EVDO Roll out in any part of world can carry Voice on it

EVDO = EVolution Data Only ||| and (EVDO+Voice) = EVDV (Evolution Data and Voice)

EVDV were never came from Table to Implementation

all world using EVDO only for Data and 1x for Voice

Just see the screen of Samsung Corby it show dual Cell Signals

On Reliance EVDO, still there will be no data and voice simultaneously; But you will not miss any calls as data transfer will stop for the duration of the voice call...

Thanks a ton for the valuable inputs :)

Updated post!

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Need clarification :

MIN (Mobile Identification Number) can vary in the same mobile as it is assigned by the operator. True? :)

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@Hetaldp

Does this mean that even if there is a Spectrum Auction sometime in future for CDMA EVDO (Which is being talked about quite often now).....

The additional spectrum can be utilized only for carrying EVDO Data and not voice...

What i mean to say is that will the voice quality in CDMA remain the same as today unlike in 3G GSM where technically one expect a better voice quality if you are on a 3G Voice+Data Plan?

And what about LTE network rollout by Verizon in U.S.? Is that also limited to High Speed Data with no Voice Carriage?

All Additional Auction for EVDO will only be used in Data Only

EVDV (EVolution Data and Voice) specification is Dropped

1x Advanced + EVDO Rev B = Data and Voice Simaltaneously

Reliance and TATA may also refarm there 1x spare carrier for Additional EVDO and Stop giving 1x Data at all in Congested area = 1x DATA is big big congestion maker and so is the Heavy Data Charges from TATA and Reliance

And there is only Single Carrier, there is lot of Over lap in between the Tower so is bad Data Rate, Multiple Carrier will smooth this Out.

as EVDO is Dedicated Carrier Congested Voice Network can never touch it

as with 1x Congested EVDO can never touch Voice Quality

1x Voice usage 4GV Codes = EVRC v2 is equallent to 3GSM Latest Codes for same quality we alreedy getting boys

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:signthankspin: Hetalbhai For Excellent And Informative Answers For All Questions. +1

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karthik R, thankyou for this detailed information, very useful

Hetal DP, thankyou for your clarifications and information.Would like to know why did they dropped the idea of EVDV and never came out, i mean what are the cons and pros for the same that companies never realised to plan that out in market?

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Would like to know why did they dropped the idea of EVDV

Let me answer that, as you know EV-DO suffers from its namesake implied - the limitation of carrying only data on a single channel. EV-DV [Evolution-Data and Voice] on the other hand merged data and voice on a single channel but become a commercial flop. Why? <_<

Tracking EV-DV's decline is a fairly simple process - its fall is almost inversely proportional to EV-DO's success, starting with SK Telecom's deployment of EV-DO in 2002 to Verizon Wireless' and Japanese carrier KDDI's adoption of the technology. The critical holdout, however, was Sprint, EV-DV's last champion, and its signaling of an EV-DO rollout last year seemed to be the death knell for EV-DV.

The CDMA market simply could not support two competing technologies providing essentially the same capabilities. Vendors would be hard pressed to support two separate development tracks without high carrier demand for both but spreading the industry across two distinct infrastructures would undermine the economies of scale from having a unified platform.

Follow this link for more detailed analysis on the downfall of EV-DV

In March 2005, Qualcomm scrapped development of EV-DV chipsets and focused on improving the EV-DO product line :threatenlumber:

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Karthik R, :signthankspin: for your link and answer to my questions.

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Thanks for the post. Well it is indeed educative and I loved the simplicity of the post. Please continue to post such informative articles. Good for newbies (is it noobs) like me!

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This help a lot...I just got a CDMA connection and have been struggling with the myriad terms and jargon's on posts here.

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+1 Karthik nice info

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Nice article and very informative. Good topic to get all info in one place. Thanks :)

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