Nortel Business Series Terminal T7208 - digital phone "setting password nortell phone" Questions

Setting up the Voicemail on a Nortel T7208 I am trying to set up the Voicemail on a Nortel T7208. I've dialed FEATURE 9 8 1, but it asked for a mailbox number and a password followed by the number ...

...password for 2007 color phone " color*set" when promted for admin password. Further trick is to "down arrow" for ok. If you get dhcp server startup hit services again and again until you get to admin ...

...phone however someone has already previously used a passcode..need to reset this? How do i go about doing this? 1. press feature 983 password is 1020000 2. mbox 3. chng 4.extention number 5.reset ...