In the international standard classification, q+ user involves: .
IETF - Internet Engineering Task Force, q+ user
RFC 4233-2006 Integrated Services Digital Network (ISDN) Q.921-User Adaptation Layer
RFC 3033-2001 The Assignment of the Information Field and Protocol Identifier in the Q.2941 Generic Identifier and Q.2957 User-to-user Signaling for the Internet Protocol
ETSI - European Telecommunications Standards Institute, q+ user
TS 102 332-2004 Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); Bachauling of ISDN Q.921 (Transport of DSS1 over IP); ISDN Q.921-User Adaptation Layer (IUA) (V1.1.1; Endorsement of RFC 3057 (2001)@ modified)
European Telecommunications Standards Institute (ETSI), q+ user
ETSI TS 102 332-2004 Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); Bachauling of ISDN Q.921 (Transport of DSS1 over IP); ISDN Q.921-User Adaptation Layer (IUA)