idleSuppression controls the suppression of idle cells. An idle cell is
one in which the bytes of the ATM payload (up to the partialFill
level) match the idlePattern.
If idleSuppression is off, idle cells are not suppressed.
If idleSuppression is on, at least 75% of cells are suppressed under
idle conditions.
The idleSuppression attribute in the receiving Aal1Ces component
must have the same value as this attribute
The default and only value is off.