This table defines the downstream OFDM Profile usage object. All attributes in this table count MAC-layer octets and frames delivered from the MAC to the Phy. The octet counters include all MAC-layer overhead (e.g., DOCSIS and Ethernet MAC framing as well as DOCSIS MAC Management Messages), but not Physical-layer overhead (e.g., FEC overhead, NCP overhead, etc.). These counters vary by the destination MAC address of the frame. Unicast counters only include frames with a unicast MAC destination address (but include both unicast data frames and unicast MMMs). Multicast counters only include frames with a multicast MAC destination address (including multicast data frames and multicast MMMs, but excluding any frames sent to a broadcast MAC address). The broadcast octet count can be calculated by subtracting unicast octets and multicast octets from the total octets. The broadcast frame count can be calculated similarly. Since the Next Codeword Pointer (NCP) profile does not carry data, DsOfdmProfileStats is not applicable to NCP profiles. The Profile ID for NCP Profiles is 255, so this value is excluded for DsOfdmProfileStats::ProfileId.