sorry I just saw U wrote non comcast device but I thought I read that U could only use their equipment?
If you purchased this device off ebay or from some one else etc....comcast will not activate it period. That device from what ever market (orignal location it was supposed to used in, certain town/state) will be in a k status which on the comcast netowrk is a flag for stolen or lost device. I only know all this being a comcast employee. You cant use digital box that was built (the serial numbers) for that cable system where you live. Technical the box has the capablility to work in your area but comcast wont activate it though. bc the seriel number wont show up in the system that areas system to be used. sorry you wasted your money for buying them. and just a heads up the small boxes yoru refering to are dta's. Wil the all ADS (all digital switch-over) comcast will allow you to have 1 cable box, hd box, or dvr for the regualr price and up to 2 dtas free, or 3 free dtas if you have no cable boxes in your home. each additional dta is 1.99 if that helps too.