Anonymous

Newbie, Novice, all of the above. I was handed the project. We currently have four lines, plus call waiting, using 6 extensions. In the near future we will be moving to a new facility and expanding. Here are my questions:
1) What advantage does PBX have over directly connected multiple lines?
2) Is there anything out there good to read that explains this stuff?
3) Most of what I have seen is 4 or 8 lines. Can these expand from 4 - 6 - 8, or is it just one or the other?

Thanks for educating the consciously incompetent!