Kind assistence Please. COMDIAL

I have three Exam questions I have not found the answers for in the modules or text book. will you lead me into them or answer them for me. I would like to be able to read the answer somewhere. I have only a DX-80 Manual to read in.
(: 40yrs in Bell Telco world now in the private sector learning all over again :)
Thanks in advance
Stan

1) DX-120 can simultaneously accommodate how many four member (party) conferences.
2) DX-120 will allow you to designate CO line signals as ______?
3) DX-120 data collected at _______ port allows the system admin to track incoming and outgoing CO line calls.