ZTE completes EV-DO Rev. B VoIP call on CDMA2000 system
By Darren Murph 
posted February 27th 2009 1:39PM
posted February 27th 2009 1:39PM
posted February 27th 2009 1:39PM
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MEH! LTE FTW!
9.3.....yawn. I'll take my 14.4 HSDPA.
Honestly, what the hell would you use 14.4 Mbps for? Ultra-Porn... Yawn, i'll take my 54Gbps wifi.
@inteller,
::yawn:: That AT&T backhaul already strains under the iPhone load with EDGE and the sprinkling of 3G penetration it has. You think you're gonna ever get 14-some?
::laughs to self::
Wow! You are seriously drinking the kool-aid, At&t's so-called 14.4 and 7.2 speeds were location specific laboratory test. The iphone on At&t is only able to achieve speeds 'up to' 1.4Mbps down, why? Because At&t puts a cap on it. If At&t attempted to allow fasters speeds, it would bring there already spotty 3G network to a crawl. Link: http://www.tuaw.com/2008/06/16/atandt-to-limit-iphone-3g-speeds-to-1-4-mbps/ Click on the PDF press release!
Sprints EVDO Rev-A has speeds up to 3.1Mbps down, Sprint will be rolling out EVDO Rev-B. Rev-B will have speeds of 3.1Mbps to 9.6Mbps down. Extremely high-performance devices could support forward-link data rates of up to 73.5Mbps on Rev-B.
Please link to a confirmed HSPA bandwidth test showing anywhere NEAR 14.4mbps..
Interesting. An 'upgrade' without any hardware changes?
Sounds like:
1) A bad initial design
2) Another way to milk the entire cell phone carrying public into buying multiple phones
Anyone else think that this is a bit fishy?
So, by that logic no one should ever need to upgrade their OS, install new drivers, download Android cupcake?
Just because things can be improved through better programming, it doesn't mean the prior was bad design.
Hey man,
I'm not up on this tech. If it is something that requires a new handset, then it's a scam. This should have been done in the first place, that's all I'm saying. They even DESIGNED the hardware TO BE ABLE TO DO IT, and just waited to 'unlock' the ability.
IF it requires a new handset, then this is a business decision, not a tech one.
That's all.
It's called new software algorithms...
This is the first time in forever that I read a headline here and went... "...guh??"
I'm usually pretty up to snuff on cellphone stuff too, but not Verizon's tech.
Maybe it's me, but every time some mobile company does something to improve their network (specifically CDMA networks) you all find a reason (not really good reasons) to bash them. I know you only do it to feel good about being stuck with that slow and I mean slow (as in slow to implement, slow data, etc.) GSM network. Look people CDMA networks have always and probably always be a step ahead of GSM networks.... deal with it!
Except in this case EVDO is lagging behind HSDPA. There are live networks already faster than this 9Mb test case.
Luckily this bickering seems to be reaching an end, with just about everyone using the same 4G tech.
Don't forget that UMTS is actually more close to CDMA than to GMS.
UMTS = Wide CDMA/WCDMA
WCDMA is not simply a wideband version of CDMA2000, it is a completely new design.
Also, it's GSM, not GMS.
Holy Acronyms Batman!
HSDPA can only get to 7.2Mbps and AT&T and Cingular isn't going to roll out VoIP until 2012 (maybe). EVDO Rev. beats this by a mile, all while inside of 5MHz.
AT&T doesn't need to use VoIP because they already can do data and calls at the same time. The benefit of EV-DO being able to do VoIP is that they then can do data and calls at the same time, since the calls become data as well. I don't see either AT&T or Verizon allowing third party VoIP calls anytime soon, since their phone plans are still a huge part of their income.
um, HSDPA can get up to 21mbit per channel. AT&T has already talk about plans of rolling this out.
y is vzw skipping B and C? Because those are the equivalent of putting 2 engines in a car to improve the horsepower. from the carrier's point of view, B does not increase the capacity/bang for the buck of the network.
Thats a good question, the technology is there. Qualcomm has been testing chipsets with “CDMA2000, 1xEV-DO Rev. B, and Simultaneous Voice-Data Operation (SV-DO), as well as multi-carrier HSPA+ and LTE. By mid year 2010 there will be a chipset that supports HSPA+, EVDO Rev. B, and LTE.
@p3t3b2: Thanks for the response to my post above, but I like your answer here better. Data monger's wet dream. (For now.)
HSDPA might be faster somewhere, but certainly not in the US. My G1 on T-Mobile (supposedly 7.2 HSDPA) never gets speeds as fast as my EV-DO Rev. A Mogul on Sprint. People need to realize that, while it isn't as global of a standard as GSM and it's upgrade path, it is still a very good technology, hence HSDPA and UMTS in general being based on Wideband CDMA. To the guy that was bitching about this being just a business move and not an actual upgrade, did you complain when GPRS was software upgraded to EDGE?
That's because Tmobile doesn't yet have enough backhaul to the site to make HSDPA FASTER.
EVDO Latency is way lower than HSDPA. That's why they can do VOIP. HSDPA is too latent.
and ZTE is not a carrier but a vendor. But everyone new that of course...
Thought I'd re-draw nerdtalker's comment out down here. All this is nice, but backhaul is a serious issue for all carriers with too many handsets live with increasing per-unit bandwidth (*cough AT&T cough*). New WiMAX towers are already struggling with that, IIRC.
Maybe it's from tower reflections, but around Chicago I sometimes notice my Sprint speeds drop to as low as 50% as I get closer to downtown on a busy day with a strong signal.
Also, will Rev B/C upgrades be something we can ROM flash forward to like the Sprint Mogul (HTC Titan) did from Rev 0 to A?
(And before I get flamed for the carrier commentary, my friends and I nerd-race our phones on occasion to compare our carriers in different locales. So just speaking to my experience is all.)
To my understanding, as long as the device has the EVDO chip and is backward compatible (The ability of a software program or piece of hardware to read files in previous versions of the software or hardware), it should be able to upgrade to Rev-B,C...
These peak numbers are a bunch of BS anyway. Give me a RELIABLE 2 Mbit/sec with less than 200ms latency and I'd be happy.
my telus aircards regularly get around 1.6mbps down, with 120m/s latency most anywhere in alberta.
i hopw telus goes rev.B aswell... I would enjoy the speed boost
Just as an exercise in clarification. HSPA actually can achieve 14.4 Mbps but as some point out here it is very difficult as the radio conditions must be really good. EV-DO Rev A also has the same problem. To achieve the 3.1 Mbps radio conditions also must be really good. There are two versions of EV-DO Rev B, the one demonstrated by ZTE and another one that does require a hardware upgrade that will take it to 14.7 Mbps. With a similar hardware upgrade however HSPA can be taken up to 21 Mbps. As for latency, HSPA is actually a technology with inherently a lower latency because of a smaller TTI (transmit time interval). I hope this helps.