I have an office full of sales professionals answering calls. Calls come in on lines 2005, 2006, and 2007. So the proceedure is push pick-up or 4 followed by 200_. One of the salesmen can simply push one button to answer the extensions. This one person loves the advantage the other 11 do not. How can I give everyone the same advantage and even the playing field? The phone are the 550 4400 series. Does any one know of a source of tips and manuals for these phones.