CTC Union FTH4-1000MS, Руководство пользователя

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The Global Config fields display the state of OAM, if OAM is enabled. We can also see the MAC addresses of the local and remote units
in the OAM manageable pair. The Flags Field list the results of individual events based on the results of OAM protocol data units (OAMPDUs).
Lastly, when two OAM devices start negotiation, there is Discovery Information passed between them. The results are shown here.
Most information carried by OAMPDU is encoded using type-length-value (TLV) format. The first octet (or byte) of the OAMPDU indicates
the type. This type is used to let the OAM client know how to decode the bytes containing the information. The next octet carries the length of
the information. This display has
TLV information for both the local and remote OAM units.
Ethernet OAM also defines a set of standard event conditions that Ethernet links should monitor in normal operation, and if detected,
should be signaled to a peer entity. The Link Event Notification Status conditions reflect a degraded, but not yet inoperable, Ethernet
connection. These conditions include threshold-crossing alarms on the frequency of symbol errors and frame errors.