This Recommendation is a part of a series of Recommendations dealing with the transfer of information for the management of telecommunications systems. This Recommendation defines the requirements of lower layer protocol profiles for the Q and X interfaces, as defined in ITU-T Rec.M.3010 [1] and in other M.3000-series Recommendations. The companion ITU-T Rec.Q.812 [2] defines the requirements of the upper layer protocol profiles for the Q and X interfaces. The Q and X interfaces will support bidirectional data transfer for the management of telecommunications systems.