One of Enterprise users’ biggest disappointments regarding Ethernet services is that they are often un-available in certain locations.  This is especially problematic for multi-site Enterprises that are geographically diverse.  Delivering Ethernet services ubiquitously requires carriers to use a variety of access technologies such as fiber, SONET/SDH, TDM (EoT3/E3/T1/E1) and copper (EoDSL) as well as a variety of leased services (TDM, SONET and Ethernet) to reach all of a multi-site customer’s end points.  An additional challenge is to make all of the Ethernet services offered over a variety of technologies to look the same.  Often different technologies from different manufacturers have different Ethernet service attributes such as VLAN support, QoS capabilities, maximum packet sizes,