This TS provides a Session Initiation Protocol (SIP) based protocol framework that serves as a means of user configuration of supplementary services in the IP Multimedia (IM) Core Network (CN) subsystem. The protocol framework relies upon the contents of the Request-URI in a SIP INVITE request to enable basic configuration of services without requiring use of the Ut interface.
This TS is applicable to User Equipment (UE) and Application Servers (AS) which are intended to
support user configuration of supplementary services.
full Table of Contents for TS 24.238 Word version: 15.0.0