In order to guarantee a constant adequate quality of service in a situation where a customer’s Internet connection has limited bandwidth, it is important to consider not only the total number of already established concurrent calls but also how much bandwidth each one consumes. (The actual amount of bandwidth depends on the codec used and other parameters.) A new addition to the call control module allows the administrator to specify limitations in terms of the available bandwidth, so that PortaSwitch can then correctly determine whether a specific customer’s site can place (or receive) additional calls.