Longtime customer asked me to take over maintainance on system he bought along with an office. In storage for awhile.

I brought the system up several times on my bench prior to installation at the new premise and looked at some variables. Upon fire up it hung at "system startup in progress" screen. I finally did a cold start and got the system running, but am having a hard time programming.
How can I determine the software revision level so that I can assure that I have the correct documentation?
I got the manual (I think). Some of the program numbers I am trying to utilize are not recognized by the system (such as system report or voicemail port assignment).

Thanks for your help,

JE