12.28 MO MTSI speech call / MO UE cancels call establishment

12.27 MO MTSI speech call / SRVCC on MT side / Codec Change from AMR-WB to AMR-NB

12.25 MO MTSI speech call / EVS offered but not supported by remote UE / AMR-WB agreed

12.25a MT MTSI speech call / EVS offered but not supported by UE / AMR-WB agreed

12.23 MO MTSI speech call / EVS

12.24 MT MTSI speech call / EVS

12.21 MO MTSI Video call

12.20a Void

12.22 MT MTSI Video call

12.19 Void