We have the above system installed in one of our offices. We have a fractional T'1 with 20 channels for local and long distance. There are currently 14 folks in the office and they want to add a couple more. I know nothing about Norstar units. How many phones can we have on the system, or how many extensions. I know option 61's, 11, etc but am clueless on the Norstar. I am responsible for the system and need to know as much as possible. Our extensions begin at 1100 and end at 1113. So I need to add 1114 and 1115 to the system. Any help is greatly appriciated.