The OAM provides troubleshooting tools to enable such a capability. Most
of this is based on the IEEE 802.1ag and ITU Y.1731 standards and can also measure
typical SLA components (such as delay, jitter, frame loss, etc.) on a per-service (EVC).
The OAM capability, in addition to ensuring that the Ethernet services are being delivered
per the SLAs, also reduces the Service Provider OPEX by providing the ability
to address most of the typical service issues remotely (and thereby precluding expensive
truck rolls).
Finally, the media conversion capability provides a standardized UNI to the customer
while supporting a host of last/first mile transport technologies and media to
24 This is not particularly unique; earlier technologies such as Private Line and ATM/Frame Relay addressed
similar barriers to wide??“scale deployment by introducing demarcation devices. It was almost natural that
Carrier Ethernet followed suit.
25 This physical demarcation between the Service Provider and the subscriber/customer also signifies where
the responsibility of a Service Provider ends in terms of identifying and resolving any issues. Anything
beyond the EDD (toward the customer) is the responsibility of the customer.
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