mailing list archives
Re: VoIP QOS best practices
From: "Stephen J. Wilcox" <steve () telecomplete co uk>
Date: Mon, 10 Feb 2003 17:56:13 +0000 (GMT)
On Mon, 10 Feb 2003, Bill Woodcock wrote:
> > Looking for some links to case studies or other documentation which
> > describe implementing VoIP between sites which do not have point to
> > point links. From what I understand, you can't enforce end-to-end QoS
> > on a public network, nor over tunnels. I'm wondering if my basic
> > understanding of this is flawed and in the case that it's not, how is
> > this dealt with if the ISPs of said sites don't have any QoS policies?
QoS is completely unnecessary for VoIP. Doesn't appear to make a bit of
difference. Any relationship between the two is just FUD from people
who've never used VoIP.
My conclusion too when I looked at this a couple years back.
However, its important that the backbone is operating "properly" ie not
saturated which I think should be the case for all network operators, theres a
requirement tho if the customer has a relatively low bandwidth tail to the
network which is shared for different applications, its probably a good idea to
make sure the voip packets have higher priority than non-realtime data... (this
last comment is a suggestion, I've not actually tested this in a real
environment, low b/w lab tests tend to exclude other traffic flows)