From a Company Newsletter
This paragraph was recently put out in a newsletter:
"TCAS:
As a reminder, Change 7.0 desensitizes the alerting algorithms to eliminate nuisance alerts and to accommodate RVSM. Therefore, it is imperative that crews react as commanded in a timely and effective manner.
Since the TCAS systems on the two target aircraft are continuously reacting to changing flight profiles throughout the encounter, the crews cannot rely on visual sight as a means to not execute the full extent of the commanded maneuver. Ineffective execution to commanded vertical speed will result in increasing vertical rate commands or a reversal of vertical direction to compensate."