I have a Norstar Meridian system. I have about 50 DID numbers available to me, and need to change the number on one of my phone sets from it's current non-DID number to one of my avialable DID numbers. I can assign a line to the number and name the line and the set, but am having trouble assigning a specific line to a set - I'm assuming I need to know which port it's on and have not seen that in the config or admin areas... any help is very much appreciated.