Is it possible to change the station number on a phone?
When I dial ext. 208 I get a super busy signal and it reads plug out on the display. Why?
I need extension 208 for a new person.

an outcoming call is redirected to the initial recorded office greeting instead of that extension or that extension's mail box.
How do I change this?

she is using a samsung prostar dcs compact.

Do I need to open that?
Sorry, I realize this sounds extremely ignorant but the manual is "who knows where" and there is no one here who knows how to fix this. I have googled for at least 3 hours and frustrated.