This object is a count of the number of frames that
have been received on this port with an invalid
packet marker and no PMI errors. A repeater will
write an invalid packet marker to the end of a frame
containing errors as it is forwarded through the
repeater to the other ports. This counter is
incremented by one for each frame received on this
port which has had an invalid packet marker added to
the end of the frame. This counter indicates
problems with remote cable segments, as opposed to
problems with cables directly attached to this
repeater.