Check out Skype with subscription. It's very cheap.
I did a quick search in Google to find a USB phone adapter and I found the product that allows you to hook up Elk to Skype.
But there's a catch: You must have your computer on (with USB connected) and stay connected to the Internet.
Grayson, actually I think I looked into that a bit earlier..perhaps you mentioned it another thread. Yeah, it is quite a catch to have it hooked to your computer. I could hook it to my HTPC which is near the entrance...but I generally don't feel it is 100% reliable. Also, can't they just kill everything from your breaker box? Mine is right at the entrance.
I am just wondering if I should apply the old KISS principle here and opt for something like this:
https://nextalarm.com/products.jsp;jsession...41905FB088219A6