Set up your Auto-Attendant to repeat the greeting automatically, and if you can’t do that, select an option key for callers to press that will replay the message. Callers may miss the option they need the first time, and not realize it until later. Some systems automatically route the call to the operator if you don’t press anything. But don’t automatically route the call until after the message has repeated at least once.
I’ve heard Auto-Attendants that disconnect the call if you don’t make a selection quickly enough! Talk about not being customer-friendly! A recorded voice saying, “Goodbye,” simply because I was thinking about the option I needed, or didn’t realize I had reached the end of the menu, is a great way to lose a customer!