Because of noise on phone (ext 225) I swapped for another device (ext 229) but I can't figure out how to swap the extension line and vm boxes. Any suggestions where I should look in reference guides, or what this feature would be called?

Welcome to the boards, Rustybroad:

How exactly did you swap them, just unplgged and moved them?
Did the proper ext come up at the right locations or did the ext # follow the phone?
(Do a Feature *0 and press intercom - check display for ext number)

I just unplugged & moved them, the ext stayed with the phones OK, I verified as you noted.

I am assuming that you did NOT want the ext to stay with the phones.

Move them back to where they were.
Verify the ext #'s are back correctly.
Then disable the SET RELOCATION option.

If you don't know how or can't get into programming, then contact a local Norstar Tech to help you out.

Then you can switch the phones without the ext moving.
They are the same model phone? - Right?