This TS defines the requirements for and gives guidelines on the MMI on the User Equipment (UE). This includes the requirements of the user procedures for call control and supplementary service control, the requirements on the physical input media and the output, such as indications and displayed information.
This TS included requirements only to UE connected to CS Domain. See TS 22.101
for overall service principles and TS 22.001
for circuit telecommunication services.