also to make sure your modem has the correct bootfile, unplugging it for 30 seconds, then rebooting it will make sure it has the performance bootfile downloaded, 16mb went up to 25, blast which was 25-30 went up to 50, and Extreme50 went up to 105. Extreme105 went away and XFinity Platinum Connect is coming the the northeast sometime soon, However from my research, you need to rent an arris802 mta atm, not sure what the modem is, but you need to run 8channels not 4 for the 305down package when its out. other than that, you can check your signal by going to 192.168.100.1 in any browser. Click on signal (assuming you have a surfboard modem) your downstream should be from -10 to +10 if your over +10 its not really a problem till you get over +15. Lower than -10 is an issue. Your upstream should be between 35 and 49.9 again 52ish is ok, anything over 54 is bad news where you wanna call comcast and tell them your modem is failing grandslam and you need a tech out.