Re: PAIX

[David Diaz <techlist () smoton net>]

Well... remember it's speed of light THROUGH fiber which isnt the 
same, its actually a bit slower then "c"

Coast to coast you should see 35 - 65ms depending on the route.

We've all had this thread about router overhead.  If there is a 
congestions point in the middle with buffering and traffic level 
priorities running, then you are right.  Otherwise I dont think you 
should see 150-180ms.

In the real world however, yes, off several dsl links Im seeing those 
levels to various sites, I think it's more a factor of congested 
peering links or traffic aggregation at a hub.  People arent spending 
the money to upgrade links right now.



At 10:13 -0800 11/18/02, Jere Retzer wrote:
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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


--

David Diaz
dave () smoton net [Email]
pagedave () smoton net [Pager]
Smotons (Smart Photons) trump dumb photons