[lug] VoIP quality issues and MTU

Lee Woodworth blug-mail at duboulder.com
Fri Sep 23 20:55:38 MDT 2005


Hugh Brown wrote:
> I don't know about MTU, but in a previous life they did voip over a vpn
> and 80ms latency was the target the vendor said we needed to hit to
> maintain average call quality.
Hmmm. I see ping RTT of
   82-88ms   qwest/DSL at EldoradoSprings <--> Qwest/ATM at Boulder(Earthnet)
   85-90ms   qwset/DSL at EldoradoSprings <--> Mesanetworks at Longmont
   35-36ms   Mesanetworks at Longmont     <--> Qwest/ATM at Boulder(Earthnet)
   52-62ms   Mesanetworks at Longmont     <--> www.google.com
Looks like home based VOIP might have quality issues if the
qwest/DSL RTTs are the norm.




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