Time frame

Here is the only schedule I know of: http://www.cox.com/aboutus/policies/alldigital.cox

Hi HELLOPEOPLE,

The all digital process began in your area on 7/27/15. You can go online, utilize our simple automated phone process, or go into a retail store to get your mini box. We will continue to utilize several methods to notify you and ensure you have all the important details around going all digital. Please also continue to check your "News from Cox" portion of your monthly statement.

So do I need a box for every TV in the house? and what is the price for each box?