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service networks. This section investigates three key Ethernet service network applications
where EoS-enabled MSPPs play a prominent role:
?– Ethernet Private Line (E-Line) service delivery
?– Ethernet access to Ethernet or IP services
?– Dedicated EoS networks
E-Line Service Delivery
The MEF defines an Ethernet Private Line (E-Line) service to be a point-to-point service,
one that uses a point-to-point Ethernet Virtual Connection (EVC) between two
user network interfaces (UNIs) [13]. However, the term private line connotes not only
point-to-point connectivity, but also the reliability attribute of Carrier Ethernet (to
match the high availability of traditional DS-1 and DS-3 private line services). For fault
tolerance alone, the MSPP proves an ideal vehicle for delivering E-Line services. In
many cases, the service provider needs to provide DS-n private line and E-Line services
to the same customer location??”another key advantage for EoS. The OSS capabilities
required to manage E-Line services match closely those for traditional private line services,
so for those service providers who already deploy large-scale traditional private
line service, the operational hurdle to deploy EoS on MSPPs is relatively low.
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