?– Ethernet access to Ethernet or IP services Customer locations C, D, and E
have access to the Ethernet and IP services provided by the switch and router at
the data center.
?– Dedicated EoS networks Customer locations C, D, and E (and the node at
CO Y) form a dedicated Ethernet network with E-LAN connectivity among these three
locations.
The economic analysis investigates three deployment scenarios:
?– Greenfield network In this scenario, none of the EoS network elements have
been deployed. The service provider must build the entire access network.
?– IOF in place In this scenario, the service provider already has deployed a
SONET IOF network (MSPPs 1, 2, and 3) to support its general IOF requirements.
To support the additional Ethernet service requirements in this example, the service
provider must deploy the two access rings and must equip MSPPs 2 and 3 with
EoS transport interface cards.
?– IOF + access in place Here, the service provider already has deployed the
SONET IOF and access networks to support its general IOF requirements and to
provide DS-n and/or OC-N access and services to its customers. The incremental
Ethernet services in this example require only the addition of Ethernet interface
cards at the MSPPs.
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