ETSI TR 129 998-4-1 Universal Mobile Telecommunications System (UMTS); Open Service Access (OSA); Application Programming Interface (API) Mapping for Open Service Access; Part 4: Call Control Service Mapping; Subpart 1: API to CAP Mapping (3GPP TR 29.998-4-1 version 4.2.0 Release 4)

standard by European Telecommunications Standards Institute, 09/01/2001