An Ethernet Metropolitan Area Network (10) provides connectivity to one or more customer premises (161, 162, 163) to packet-bases services, such as ATM, Frame Relay, or IP while advantageously providing a mechanism for assuring security and regulation of customer traffic. Upon receipt of each customer-generated...http://www.google.de/patents/US7120150?utm_source=gb-gplus-sharePatent US7120150 - Technique for ethernet access to packet-based services
