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Re: Enterprise VoIP Peering Point?
I've heard this a few times in the past few weeks:
"Sorry, my vonage phone is breaking up. Can you repeat that?"
Many of the folks that I talk to who are using un-prioritized bandwidth
into their homes/small businesses frequently have problems. These are
DSL and Cable users.
The cheap end-user equipment could easily have ready support for voice
prioritization. E.g., the D-link DVG-1120 specs say that "Voice service
is prioritized over the data traffic"
DSL and Cable IP providers could do something similarly simplistic that
would go a long way on the bottleneck links; e.g., prioritize UDP
higher than TCP.
"Headroom" on high-capacity links is *probably* primarily because the
typical bottleneck link sizes between users and their servers is so
small. Most of my downloads from popular servers max out <400kbps, even
though I have a lightly-loaded 18Mbps link into my office that's barely
used. Something out there is traffic-shaping the download, or else my
flow crosses a congested link. In the latter case, unprotected
real-time flows across that congested link will have problems.
Mark R. Lindsey Engineers' Consulting Group
Office: 229-244-2099x2207; Mobile: 229-630-5553
On Aug 11, 2004, at 11:29 AM, Paul Vixie wrote:
and we would maintain enough upstream IP headroom that questions of
quality wouldn't even arise.
Interprovider RSVP anyone?
is anybody seeing enough IP congestion for this to matter, anymore?
the bankrupt fiber and ebay GSR's in the world, i'm seeing that pretty
everybody has enough headroom to do good quality voip, other than on an
enduser/enterprise basis where somebody's last mile might be full of
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