“HOW DVR BE INTERFACED WITH INFRARED SURVEILLANCE CAMERAS MADE BY OTHER COMPANIES? SINCE I ALREADY HAVE 4 CAMERAS OUTSIDE, INFRARED ONES, CAN I SIMPLY DISCONNECT THEM TO THE DVR IN MY HOME THAT NO LONGER WORKS AND THEN HOOK UP MY OLD CAMERAS TO A NEW DVR LIKE THIS UNIT FOR SALE AT BEST BUY AND JUST KEEP THE NEW CAMERAS INS TORAGE FOR NOW?”