Recommendation ITU-T G.987.3 describes the transmission convergence layer for 10 gigabit capable passive optical network systems - a family of flexible access network systems that operate over a point-to-multipoint optical access infrastructure at nominal data rates in the order of 10.0 Gbit/s in at least one direction, while providing a wide range of broadband and narrow-band services to end-users. The present Amendment extends to the G.987.3 the concept of Cooperative DBA and the general DBA framework, which have been developed in the context of G.989.3, and extends the maximum number of the burst allocation series per ONU in a BWmap to 16.