[Asterisk-Users] just getting started

[Eric]

Is there a webpage to look at to get started with a basic setup such as what
I need below.

I want to setup a remote office and a home office to be able to make calls
from either location to the area code of the other location.
what equipment would I need.  (basic)

or if I wanted all users at home office to be able to access it . and only
one user at the remote site?

Thanks