for my voip network/peers, i can withstand rtt's of around 600ms - granted the quality sucks at that sort of latency, but data/ip routes into some of the less-than-developed places in the world are crap at best, and any phone is better than none Jared Mauch <jared@puck.Nether.net> wrote:
On Mon, Nov 18, 2002 at 10:13:48AM -0800, Jere Retzer wrote:
Stephen Sprunk wrote:
Any point in the US is within 25ms RTT (or less) of a major exchange;
eliminating this 25ms of latency will have no effect on VoIP unless you're already near the 250ms RTT limit for other reasons.<<<
25 MS is assuming that the only delay is due to the speed of light. Add
equipment, especially routers or other gear that requires manipulating packets and the delays add up quickly. I once read that the most people wil tolerate on a regular basis is around 150-180 ms. I think that is much too high for regular use
True.
As far as VoIP goes, take 2 (digital/pcs/gsm/whatnot) cell phones (preferably on different carriers, or even the same if you want to see it) and call the other phone. Check out the delay in there. People who think that VoIP needs low delay don't realize the [presumably compression and other dsp related] delays introduced that people will be able to withstand.
- jared
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