M.3 Application usage of SIP

K.2 GPRS (Iu mode only) aspects when connected to the IM CN subsystem

K.3 Application usage of SIP

M.1 Scope

J.1 Scope

J.2 EPS aspects when connected to the IM CN subsystem

K.1 Scope

J.3 Application usage of SIP

3 Definitions, symbols and abbreviations

6 Supplementary services and enhancements