Is it possible to assign extension lists to buttons? We have 2 groups of lines and we use the 8-group and 9-group to select which group to dial from. However, we'll be adding two more groups of lines and we need to be able to select which group to dial out from. I thought we might be able to assign an extension list to the buttons, but that doesn't work. Is there another way to chose from groups of lines to dial out? Perhaps modifying the dial plan to use two digits for outside lines - 9+"groupnum"+phone number perhaps? Any help is appreciated