An Ethernet Demarcation Device enables Ethernet services to enterprises and business subscribers. Owned by service providers and located at the customer premise, it provides a clear demarcation point between customer and service provider Networks. As well as delivering managed services to customers with Quality of Service (QoS) control for each service, these devices have all the necessary carrier-class management and Operations, Administrations and Management functions essential for service providers to monitor Network health and performance up to the demarcation point.