8 7 6 5 4 3 2 1
1 H G F E D C B A
BA Closed user group call indicator
0 0 non-CUG call
0 1 spare
1 0 closed user group call, outgoing access allowed
1 1 closed user group call, outgoing access not allowed
bit
C Simple segmentation indicator
0 no additional information will be sent
1 additional information will be sent in a segmentation message
bits G-D Spare
bit
H Connected line identity request indicator
0 not requested
1 requested