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.