I purchased an AT&T Integrated Solutions III voice messaging system-4 port Audix voice mail system and Legend system SPM programming console on ebay to replace the 2 port voicemail I have (My old one is a Merlin Mail used with my Merlin Legend release 2.1 phone system). I don't have the foggiest idea how to install it except to look at how the old unit is installed. Also, I don't know how to operate it - it comes with a monitor and keyboard and when I power up it asks for the password which I don't know. The guy I bought it from said that the passwords were defaulted. How do I find the default password? Also, how is the best way to find manuals for it?