�1���� Rate adaption to a 64 kbit/s channel
������� 1.1���� Rate adaption of 8, 16 and 32 kbit/s streams
������� 1.2���� Rate adaption of streams other than 8, 16 and 32 kbit/s
�2����
Multiplexing into a 64 kbit/s channel
������� 2.1���� Time division multiplexing of 8, 16 and 32 kbit/s
����������������� 2.1.1���� Fixed format multiplexing
����������������� 2.1.2���� Flexible format multiplexing
������� 2.2���� Multiplexing of rates other than 8, 16 and 32 kbit/s