I need help with a telephone system. As I mentioned before (the thread on using DirecTV for 
internet access in Costa Rica), I'm in the process of building a house that will also house my 
office. Along with my broadband needs, I am also looking for the ability to have what would amount 
to an inter-office phone system. The thing I'm looking for, in Spanish, is called "una central 
telefonica." I would like have the ability, for example, to dial 101 and get a phone one room of 
the house, 102 and get another, etc. Then "dial 9" for an outside line. I would have one incoming 
line, but would like to be able get a "phone router" to split that up for the whole house. This 
would solve phone and intercom needs all in one package that I could mount in my rack with my hub 
and server equipment. 

First question is this: Can I do this with Linux? Is there a package out there that I could install 
on a headless, dedicated machine that would server as a "telephone/call router"?

Next question is: What is this thing called, in English? I've been searching on eBay and there are 
units that seem to be what I'm looking for that range from 10 dollars to almost 3k. 

FYI: I'm up in Cameron, MO, right now. Flew up from Costa Rica Monday. You guys oughta pay your 
stinkin heating bill. It's downright COLD up here!

-Greg