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355 posts

Ultimate Geek


  Reply # 140166 24-Jun-2008 13:35
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I've personally tested VoIP via several of the 3G and HSDPA handsets. Costs aside, it's not a viable option currently. The reason is the 'latency' rather than the bandwidth, which Vodafone has plenty of. Inherent in all wireless data transfer is the travel time from device to tower and vice versa. This would essentially be adequate, simply delaying transmission for a second (as I witnessed at particularly low usage times and when close to the tower). Vodafone however 'at present' has relatively poor network cooperation for uses such as VoIP and other latency-sensitive services. If you'd like to test this, perform a 'ping' via your command prompt at various times throughout the day while using the 3G/HSDPA service. Latency times vary wildly, even from second to second and since these VoIP protocols rely on optimisation to work effectively, it cuts any level of quality off at the knees.

I'm impressed with the pricing shift though I suspect it's simply as a precautionary measure so when NZ Com enters the market place with their own data structure (tipped to be much more hip with regards to todays technology and mobile capabilities), Vodafone isn't put to shame. Telecom is falling WELL behind now. I know Nokia has been placing pressure on Vodafone to provide better support for their 3G and HSDPA mobiles as well. They felt adding these expensive data chips wasn't much of a sales incentive if the prices were too high to be utilised. Expect Nokia's new mid-range lineup to include at least HSDPA 2100mhz capabilites, but also 900mhz and soon, 7.2mbps.

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  Reply # 140311 24-Jun-2008 21:09
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Using both a N80 and N95 for voip over 3g I found no problem with latency at all, there were issues with missing words etc if moving or in crap signal. Never high latency tho, no worse then a DSL connection for talking on when stationary with good signal.

Thats with it registered straight to to 2talk/italk.

I did find the 3g data on the N80 was much more reliable then the N95 is - both are set to UMTS only since they always fall back to GSM when driving.

With the N80 I never saw googlemaps fail to load data when driving. It was also loading lots more since it was popping all around the place since it had no GPS. the N95 often leaves me driving thru areas of white loading symbols untill the data comes thru.




Richard rich.ms

 
 
 
 


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  Reply # 140352 25-Jun-2008 00:53
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So for $1 you get 10Mb...anyone knows who are currently using VOIP through 3G coverage how many minutes worth of calls you can do? Planning to use 2talk on the N95.

Edit - Someone in this thread said 10Mb = 20minutes worth of VOIP.....sounds correct?




Do whatever you want to do man.

  

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  Reply # 140362 25-Jun-2008 06:49
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Ironically I found using VoIP over 3G very good when I was in Aussie last month using Vodafone. Using ulaw failed miserably but with G.729 calls were rock solid. I have also used G.729 a bit here recently and found the call quality to be far better than it used to be. I know Vodafone have been upgrading a lot of their core network so it's obviously helped!

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  Reply # 140438 25-Jun-2008 13:26
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hmm...just setup 2talk on the N95 and 2talk registered with the 2talk servers fine and my account balance went down by an exact $1. Maybe the $1/10Mb pricing is aleady active for prepay customers even though suppose to be 27th july. Would have been great if Vodafone online account let you see how much data you have used.




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Reply # 140543 25-Jun-2008 18:39
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Current data charges for prepay are $10 for 1 megabyte charged in 10KB blocks I believe ...

So you probably used 100kb which is why your balance went down by $1..

Great charges huh !  Just imagine how much it costs to view web pages right now ..

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Ultimate Geek


  Reply # 140545 25-Jun-2008 18:50
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Rich, that's surprising. I understand Vodafone is rolling out optical links between their cell towers, this may have occured already in some areas. Where do you reside and what were your ping times please?

SBiddle, Australia's ping times for their wireless networks are marginally more than wired though they DO impose VoIP restrictions on known ports and protocols. I expect we will be there soon if our data plans get any cheaper.

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Ultimate Geek


  Reply # 140550 25-Jun-2008 19:02
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G.729 will help any voip situation :)

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  Reply # 140593 25-Jun-2008 21:22
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I have no idea if I am using G729 or not, I think not since the call quality is actually pretty good.

Using it predominantly at unitec which I believe is off a site on great north road in waterview since thats where googlemaps puts me without GPS active, or at home which is in beach haven off the site by the downhill end of the upper harbor highway bridge.

edit - And I have no idea on the ping times since I dont know how to find the handsets IP address when it has an active connection to try pinging it.




Richard rich.ms

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Ultimate Geek


  Reply # 140606 25-Jun-2008 22:53
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G.729 should improve call quality. It would make sense for them to upgrade those areas first. This is promising, it means when their central optical network is up and running, relay times should be minimal. That means VoIP is a real possibility until they start imposing restrictions.

When you have some spare time, Rich, plug your device into a PC and ping google.com a few times to achieve an average latency. The issues that most people have is the wildly fluctuating amounts. One moment it can be reasonble, the next, over 1000ms. In theory, one could live with a constant 1000ms, you'd simply notice a delay in voice signal. It's the fluctuation which inhibits optimisation, this makes calls drop or adds static/defects thanks to the protocols used. I've tested G.729 and it performs better though it's by no means fool-proof.

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  Reply # 140739 26-Jun-2008 16:44
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On a proper internet connection g729 is far worse sounding then ulaw, why would it be the other way around on a 3g connection?




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Reply # 140743 26-Jun-2008 17:09
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cafeg: My vote would be for $30 a month for an unlimited connection capped at say 500 megabyte
then $1 for every 10 megabyte a day after that during the month  


These prices are already here... What's wrong with $29.95 / 200 MB or $49.95 / 1 GB plus $0.50 / MB after  then?

Seriously I would like to see $19.95 for fair use (5 GB), the same as AT&T. Ok, this won't happen, but $19.95 for fair use (1 GB) wouldn't hurt either.




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  Reply # 140748 26-Jun-2008 18:15
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freitasm:
cafeg: My vote would be for $30 a month for an unlimited connection capped at say 500 megabyte
then $1 for every 10 megabyte a day after that during the month  


These prices are already here... What's wrong with $29.95 / 200 MB or $49.95 / 1 GB plus $0.50 / MB after  then?

Seriously I would like to see $19.95 for fair use (5 GB), the same as AT&T. Ok, this won't happen, but $19.95 for fair use (1 GB) wouldn't hurt either.


Ditto. It would be awesome to have 1GB cap for $19.95. VOIP is what I would use for it mainly and ditch GSM calls all together.




Do whatever you want to do man.

  

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  Reply # 140758 26-Jun-2008 19:26
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richms: On a proper internet connection g729 is far worse sounding then ulaw, why would it be the other way around on a 3g connection?


It's not that G.729 sounds better - it's the fast ulaw/alaw with it's requirement of a guaranteed 87kbps in each direction and very poor handling of any form of jitter isn't very well suited to a mobile data connection. G.729 on the other hand handles this a lot better and of course has far lower bandwidth requirements.

mwg

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Geek


  Reply # 140893 27-Jun-2008 13:47
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Not sure if this is the right topic, so apologies in advance..

I have a BB 8700G that I got from Aus. I'm currently on prepay with it (I have a work phone). I would like to be able to use the Gmail app I have installed, however it doesn't seem to function on voda prepay at the moment (complains about lack of data connection).

Once the new casual rate becomes available, will this start working for me?

Any advice appreciated.

M

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