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