If MAC ID,s are hard coded what would one do if they took out a donation or hooked up to some panel that the MAC ID was being used by some MAG 250 device ?......As Mag 250 is static and addresses can be made on the fly.Also am curious as to why A Mag 250 and Mag 254 could not use the same MAC ID (Not both on at same time) on the server.?...Totally baffles me as at this time only familiar with MAG 250 architecture.