A server system provides admission control for a communication system where Point-to-Point Protocol Over Ethernet (PPPOE) user systems transfer requests to use the communication system and transfer bandwidth usage information indicating their respective bandwidth usage. The server system receives the bandwidth usage information and receives the requests. The server system processes the bandwidth usage information to determine average system bandwidth usage. The server system processes an available system bandwidth and the average system bandwidth usage to determine a maximum bandwidth authorization. The server system determines if the maximum bandwidth authorization exceeds a threshold in response to one of the requests. If the maximum bandwidth authorization exceeds the threshold, then the server system grants the request, but if the maximum bandwidth authorization does not exceed the threshold, then the server system denies the request.