Responsible for the UNI to UNI Ethernet service (MEF 26.1 p9)
The Service Provider (SP) contracts with the Subscriber for delivery of service per the service requirements specified by the Subscriber. The commitment of the SP is specified in the Service Level Agreement (SLA) which defines the service, billing, support and maintenance.
Note that the SP may contract with one or more Operators of Carrier Ethernet Networks (CEN) in order to provide an end-to-end service across or within areas not within its own network.