SUA
SCCP User Adaptation
SUA enables the transport of any native SCCP (Signalling Connection and Control Part) user signalling such as TCAP (Transaction Capabilities Application Part) or RANAP (Radio Access Network Application Part). Like SCCP it provides the user with both connectionless and connection orientated services as well as network management functionality. SUA like the other adaptation layers requires the services of SCTP (Streaming Control Transmission Protocol) to provide reliable transfer of user messages.