12.13c MT MTSI speech call Successful with preconditions at originating UE and without preconditions at terminating UE

12.12a MO MTSI Voice Call Successful without preconditions at both originating UE and terminating UE

12.13b MT MTSI speech call Successful without preconditions at both originating UE and terminating UE

12.13 MT MTSI speech call with preconditions at both originating UE and terminating UE

12.13a MT MTSI speech call when remote end reserves resources before sending INVITE

12.3 to 12.11 Void

12.2c MO Call without preconditions at both originating UE and terminating UE – 504 Server Time-out

12.12 MO MTSI Voice Call Successful with preconditions at both originating UE and terminating UE

12.2b MO Call without preconditions at both originating UE and terminating UE – 503 Service Unavailable

12.2 MO Call with preconditions at both originating UE and terminating UE – 503 Service Unavailable