I inherited a DK40i when I moved into my office (base cabinet w/ expansion - 4 lines, 16 stations) and I've been using it for a year with 3 simple direct phone lines (no rollover) with telco voicemail, and 3 2020SD phones. I just bought a system from a neighbor (moving out of my building) that includes an identical base+expansion cabinet and the following:
8x 2010 SD phones,
RCOU1a,
RCOS,
KSTU2,
K5RCU,
Stratagy Flash 4-port voice mail w/ PC cable and software.

Basically, I want to know if I have everthing I need to do the following:
(1) Go from 3 incoming lines to 7, with 3 rollover and 4 direct lines dedicated for use by individuals.
(2) Have the secretary be able to transfer a call that comes into the main line (rollover) to a direct line.
(3) If a call comes into a direct line that is busy, have the call transfer to the main line instead of voice mail.
(4) Have messages lights work finally with the voice mail system (they didn't with the telco's voice mail).
(5) Add fax capability, but still be able to use the line for phone (I get and send only 1-2 faxes a month).
(6) Music-on-hold.

Thanks for any help in advance.