Q. Why are these calls being made?
A. To help us improve the performance of our phone products.
Q. What is being communicated?
A. A variety of information. Paragraph 2 of section 2 of the phone EULA has more details. You can get to the EULA by visiting http://store.digium.com/view_agreement.php?id=37
Q. Will the phone still work if there is no access to the internet?
A. Yes
Q. Is Digium tracking it's customers?
A. No, we're simply collecting information from the phone products so that we can make them better. We have no idea who you are and will not be collecting that kind of information.
Q. Is there a way to turn this off?
A. No