I got my Linksys WRP400 last week, our WAN connection is PPPoE I have two laptops connected with router by wireless and enabled one voip port everything working fine for me i have internet on my laptops and i can make international calls. the only problem when downloading some file from internet it affecting on voice quality. i tried to enable QoS inside the router giving SIP and RTP ports high prirorties and low prirorties to HTTP, HTTPS and Mail. still i have problem when with voice quality. I will be grateful if somebody can help with this case or and advice for setting QoS configuration.
P.S.: when i do only browsing and chatting the voice quality is ok only when happen when i do continous downloading.