Hi Naazira,
We ahve various disadvantage of static threshold like: we observe a
penalty as we increase the number of hops even at minimum FCL, where the best transient suppression performance is
obtained. This arises from small power excursions caused by
burst add–drop at each node which are not fully suppressed
and these excursions accumulate with increasing number of
hops.
Also, the point at which the penalty starts to increase
sharply due to insufficient gain transient suppression shifts to
lower values of FCL as the number of hops traversed increases.
This occurs because there is insufficient power in the feedback
channel to compensate for the increasing amplitude fluctuations.
Thus, the transients caused by the adding and dropping
of bursts sharing link amplifiers accumulate with each hop and
a lower FCL is required to achieve optimum performance as
the network size grows.
So, we should opt Dynamic threshold.