What is the cheapest way to opbtain ethernet lines onto a device. Would it be cheaper to just buy a voip phone system like allworx...or is it cheaper to use an open source software like asterisk and buy their equipment to have voip on the computer. Also if i was to use the asterisk which model would give me the most ports possible. Like if i want to host people what steps do i have to take, buy one of those card put it into my computer configure it, then im ready to go...Also how many lines would i be able to put and how much can i expand it by?