...but if you want a really COOL IP based phone system, have a look at the new IP Office Small Office edition. It is an amazing device, I have had one in my office/home now for several months & think this is the next big thing for the SOHO market. It supports analog phones, digital phones & IP phones. It is also a small 10/100mbps ethernet hub for computer connections. It will serve as a DHCP server for a small network. It is a Router for your High Speed internet, a firewall and even a remote access server! (You can call into it remotely & access your home network & the internet if connected). You won't find a whole lot of information on the internet as to configurations but any reputable Avaya dealer should be willing to give you a quote.
I of course would be happy to give you a sample configuration & pricing if you are interested? Visit my website at
www.geckotel.com to get a sample of what I am talking about.