"What I've found is that if I sound like a robot (very staccato) people are way less likely to bother me with other issues."
I think the key question here is whether or not your job is just to provide simple data, such as answering routine questions or some such, or developing a relationship with somebody. Many companies get so enamored with systematizing their process that they lose track of the big picture (in my opinion)
I was reading somewhere that when you call the guys at Zappos, they're there for as long as you want to talk to them. They'll even go online with you searching competitor's websites if they don't have what you need.
I like the robot idea, though. Need to try that one out!