The two objects hwDot3ahEfmErrSymPeriodThresholdHi and
hwDot3ahEfmErrSymPeriodThresholdLo together form an unsigned
64-bit integer representing the number of symbol errors that
must occur within a given window to cause this event.
This is defined as
hwDot3ahEfmErrSymPeriodThreshold =
((2^32) * hwDot3ahEfmErrSymPeriodThresholdHi)
+ hwDot3ahEfmErrSymPeriodThresholdLo
If hwDot3ahEfmErrSymPeriodThreshold symbol errors occur within a
window of hwDot3ahEfmErrSymPeriodWindow symbols, an Event
Notification OAMPDU should be generated with an Errored Symbol
Period Event TLV indicating the threshold has been crossed in
this window.
The default value for hwDot3ahEfmErrSymPeriodThreshold is one
symbol error. If the threshold value is zero, then an Event
Notification OAMPDU is sent periodically (at the end of every
window). This can be used as an asynchronous notification to
the peer OAM entity of the statistics related to this
threshold crossing alarm.