Applicable to AU only.
The Maximum Information Rate (MIR) from AU to SU-EZ.
Range for set: 128 to 12,032 (Kbps).
The actual value (Get) will be the entered value rounded to the nearest
multiple of 128 (N*128).
This parameter is not runtime. The SU-EZ must be re-associated
in order to re-apply this parameter.