[Asterisk-Users] Newbie Questions

[brez]

hello,

I am completely new to things but was wondering if some one could steer 
me in the right direction [i.e. i was volunteered to get a PBX running 
with little or knowledge] good news is, i got a lot of experience with 
open source / linux / etc. anyhow. we have 4 lines coming in and need 16 
extensions. we have the PC and the 16 analog phones. the question is 
what type of hardware will i need? i.e. modem, a phone 'hub' [or 
whatever it is called for pluggin all the phone lines into] - basically 
a small office environment. if any of you using asterisk in a similar 
environment could spell out exactly what hardware youre using [and 
perhaps where to buy it] for your office, i would really appreciate the 
help.

thanks.