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					Originally Posted by just another ref  This does not relate to the OP, where a buzzer sounds after a made free throw. At this point, it doesn't matter when the sub arrived at the X. | 
	
 The horn should not be sounded until after the substitute has reported, so why would the "buzzer" sound after a made FT unless a substitute is waiting at the X?  If there's no one there, then we keep going.  That was the point that BillyM was making.
 
Take a look at 3-3-1d.
If entry is at any time other than between quarters, and a substitute who is
entitled and ready to enter reports to the scorer, the scorer shall use a
sounding device or game horn, if, or as soon as, the ball is dead and the
clock is stopped.