I am trying to deploy a test project. Two Cisco 877 routers would be connected over ethernet connection(in between radio connection). Please note that, I am not using the ADSL connection here at all. As cisco 877 has 4 ethernet ports, I am connecting fa0 port of one router through the radio connection to the fa0 port of another router. We would be plugging in a device which would deliver high quality audio. Our goal is to receive the audio the other end without distortion. Is it possible to apply QoS only one fast ethernet ports only, as we are not using ADSL connection at all, I am little bit cocerned here as this would work or not! Thanks.