Similarly, an FSO/Wirless Mesh solution
may employ Bridging to offer E-LAN services.
It is important to note that there are no rigorous boundaries as such for each of the
solutions discussed, and solution vendors may, and often do, combine previously distinct
solutions to offer new differentiated solutions.
An Assessment Using Carrier Ethernet Attributes
Tables 16.1 through 16.8 illustrate the compliance of the various commercial delivery
solutions in the market currently, with respect to the Carrier Ethernet attributes. A
fairly broad, but reasonably distinct scale attempts to capture the actual level of support
by signifying whether a commercial solution (category) supports a specific underlying
attribute fully, substantially, partially, marginally, or not at all.5
Standardized Services Support This attribute determines the breadth of the revenuedriven
portfolio that a Service Provider can conceive; specifically, it will define the
infrastructure constraints, types of both Ethernet and non-Ethernet services at the
optimal bandwidth, and any QoS assurances that it can deliver (and charge for).
Solutions such as Bridging, MPLS, and also traditional voice-oriented solutions such
as SONET and TDM provide for a fairly robust offering across the board (which, to some
extent, may explain why Service Providers are not migrating from the latter quickly).
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