This counter is incremented by one for each frame
received on this port that meets all of the
following conditions: a) The CollisionEvent
signal is not asserted. b) The ActivityDuration
is greater than ValidPacketMinTime. c) The
frequency (data rate) is detectably mismatched
from the local transmit frequency. The exact
degree of mismatch is vendor specific and is to be
defined by the vendor for conformance testing.
When this event occurs, other counters whose
increment conditions were satisfied may or may not
also be incremented, at the implementor's
discretion. Whether or not the repeater was able
to maintain data integrity is beyond the scope of
this standard.