Well I connected a replacement to our inhouse system that has options 128,129,130 as well as 125. The replacement 5485 booted up OK. Removed the options 128,129,130 and reset it and it still booted up OK. Took it to the site changed the MAC in the ESM to the new one and it booted up. Brought back the one to my office and configured it into our 3300 and it would not boot. Added back options 128,129,130 and it booted up OK. So it does appear it needs those options at least to do the initial firmware upgrade then they are OK with out them. My question to Mitel what if I replace a 3300 with a VMCD and the customer has older sets (I guess i would have upgraded the MCD to newer software before upgradeing to the VMCD so sets would have newer firmware so they would probably be OK) but what about IP Page units or someone trying to add older phones to a VMCD. I did speak to Mitel 3300 support and their answer was to use an external DHCP server (Crappy Answer) I will try and open a ticket with the MSL guys to see if they will do anything to accomadate older set that don't support option 125
Craig