Compared to other phone systems, Norstar programming can seem a little backward. Keep in mind that on a Norstar, call routing is RING DIRECTED. 90% of the head-scratching problems I've had to fix have been due to this.
For example: The customer wants their calls answered by Auto Attendant at 5 rings. The receptionist set- x221 is call fwd on busy to vm at 4 rings. The customer doesn't understand why the first thing callers hear when they call in is "This is Suzie, I'm away from my desk...