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Re: Question about propagation and queuing delays
- From: Robert E.Seastrom
- Date: Mon Aug 22 15:30:53 2005
"Howard, W. Lee" <Lee.Howard@stanleyassociates.com> writes:
> Do carrier ISPs classify their voice traffic as Really
> Important, and everybody else's data as Best Effort? This
> isn't just selfishness, since We All Know voice is less
> tolerant of latency and jitter than TCP.
Try to keep a single-TCP-stream session over 500 mbit/sec of goodput
halfway across the country sometime. Most of us who have VoIP boxes
have 20ms or better jitter playout buffers. Ever (successfully) talk
to someone over a GSM handset when their coverage was a little
marginal? The human ear is a marvelous tool compared to a TCP timer.
Apologies if "We All Know" was supposed to be a cue to sarcasm or irony...