Jason, My strategy would be to use the same carrier at point A and point B and purchase some kind of high-priority MPLS switching config between the two. I believe Global Crossing offers something like this where they differentiate between the proletarian traffic and the uber-business traffic. The other thing to keep in mind is that QoS only comes into play when you saturate your links. Regards, Christopher J. Wolff, VP, CIO Broadband Laboratories, Inc. http://www.bblabs.com -----Original Message----- From: owner-nanog@merit.edu [mailto:owner-nanog@merit.edu] On Behalf Of Jason Lixfeld Sent: Monday, February 10, 2003 9:47 AM To: nanog@nanog.org Subject: VoIP QOS best practices 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? -jL