This Recommendation specifies the signalling transport converter sublayer on top of the Stream Control Transmission Protocol (SCTP) specified in IETF RFC 2960 [2] and RFC 3309 [5] which specifies a reliable transport protocol operating over a connectionless packet network such as IP. This Recommendation covers the specification of the sublayer structure, the PDU structures of the signalling transport converter sublayer, and the procedures for the provision of the signalling transport service.