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The basic model described in MEF 10.3 for Et= hernet services is of a Subscriber = being the end user for the service (which can be an enterprise, an applicat= ion service provider, Small Medium Enterprise (SME) etc.) contacting a = ;Service Provider who manages and operat= es a Carrier Ethernet Network (CEN) for delivery of Carrier Ethe= rnet services.
The organization purchasing and/or using MEF-defined services such as EVC-based Carrier Ethernet services. Als= o known as the 'End User' (MEF 10.3 p8)
The Subscriber describes to the Service Provider the connectivity that t= he Subscriber requires and the traffic specifications in terms of guarantee= d bandwidth (CIR) and Excess Bandwidth (EIR) and the associated burst sizes= (CBS and EBS). This is collectively known as Bandwidth Profile.
The Service Provider offe= rs the Ethernet service(s) to the Subscriber and optionally provides a Service Level Specificatio= n (SLS) which can include service performance metrics for the guarantee= d traffic (see Service= Level Agreement (SLA))
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The Service Provider (SP) = is the organization providing Carrier Ethernet service(s). The SP c= ontracts with the Subscriber for delivery of service per th= e service requirements specified by the Subscriber. The commitment of the S= P is specified in the Service Level Agreement (SLA) which defines t= he service, billing, support and maintenance.
Note that the SP may contract with one o= r more Operators of Carrier Ethernet Networks (CEN) in order to = provide an end-to-end service across or within areas not within its own net= work.
MEF 26.1 expands the= basic model (described in MEF 10.x) to facilitate the cases whe= re the service spans multiple Carrier Ethernet Networks operated by differe= nt administrative entities.
Each CEN is managed by an O= perator where the Operator provides connectivity services to = the Service Provider that in turn provides the U= NI-to-UNI (end-to-end service) to the Subscriber (as described in the MEF 10.3 model)