finer points of mechanics

[rcwilco]

Two questions:

1) If my partner is reporting a foul or doing something similar where attention is on them, and I am at the opposite end of the court with the players, and I observe an action where I need to call a T what would be the best thing to do. What until he is done and run over, make a signal right then and stay there, etc? (this next part did not happen but I was thinking about it). What if the palyers invovled do not want to stop or things are progressively getting worse. Blow whistle to get partners, coaches and players attention?Thanks.