A count of the number of times a GATE MPCP frames
reception occurs. A single counter at the ONU and a set
of counters, one for each LLID ,at the OLT. Increment
the counter by one for each GATE MPCP frame received,
for each LLID, as defined in [802.3ah] clause 64. This
counter is mandatory for an ONU and for an OLT. At the
OLT the value should be zero.