24 These are
also referred to as network termination units or network termination elements (NTEs).
NOTE While these devices may be standalone, as is the case currently, this functionality
may well be integrated into other edge devices (such as switches, routers, ADMs,
etc.) as well.
These devices typically reside at the Customer Premise (CP) or Customer Edge (CE),
and in addition to serving as a physical point of separation between the Service Provider
and user networks (typically a LAN),25 they provide three key functional capabilities:
?– A standardized Ethernet UNI
?– Ethernet OAM
?– Media/protocol conversion
The standardized Ethernet UNI essentially provides the MEF-defined capabilities
that include an IEEE 802.3 handoff (PHY), provisioning, and enforcing a bandwidth
profile for any EVCs initiated there, along with the CoS, and any service multiplexing
necessary.
The Ethernet OAM provides end-to-end visibility of the Ethernet service(s) and the
associated performance SLAs. It also encompasses sophisticated and proactive fault
notification so that any potential issues can be addressed remotely before they manifest
more broadly.
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