Hi All,
this is what i did to get my Mitel working.
. Disconnect the power from the set.
. Hold down the "Superkey" (or "Menu" key with some paper inserts) while powering up the set.
. The set will come up and ask if you want to CONFIGURE PHONE? select YES.
. "NETWORK PARAMETERS?" select NO
. "HARDWARE CONFIG?" select NO
. "PHONE MODE?" select YES
. "PROTOCOL?" select YES
. "PHONE MODE: Minet" select Change
. Select "SIP", "Accept" and confirm with "Yes". It will now save the settings to NVram
. "REBOOT NOW?" select Yes
Then when the phone boots up i checked my DHCP server to see the address it was issued its web interface to configure. Default username is "admin" and password is "5215"
Hope this helps someone.