[Asterisk-Users] SIP Client for Symbian

[Jon Radon]

I think it's about 600ms under ideal conditions.  I normally see
around 1000ms or higher on Tmo GPRS.  EDGE will not aid in latency. 
We'll have to wait for UMTS with possible HSDPA to see around 200ms,
or so I hear.


On Wed, 8 Dec 2004 17:49:58 -0500, Noah Miller <noah at rosecompanies.com> wrote:
> I don't think Steven really meant that it doesn't make sense.  I think
> he meant that it isn't practical.  I've read that latency on GPRS
> connections (even on the faster AT&T EDGE and Sprint VISION networks)
> is somewhere around 600 ms.  I've never personally measured it, but I
> have used a Treo 600 on the T-Mobile GPRS network, and I can tell you
> that that latency is WAY too high to make any real phone calls.  200 ms
> is about the maximum latency you can really deal with on a VoIP call,
> but even that is really too high.  At 600 ms, your voice wouldn't get
> to the other party forever, and vice-versa.  It might be useful as a
> Nextel-like walkie talkie device, but a real phone conversation would
> be painful.

-- 
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