I was having trouble reaching an upstairs bedroom and decided to check for interference from other networks using Xirrus WI-Fi Inspector. My Verizon Actiontec router is showing between -40 and -50 dBm at close ranges to the router but drops to about -80 or worse in the upstairs bedroom. While performing this test, I noticed occasional signals coming from two other 802.11N devices that were registering an amazing -10 dBm signal strength! Since my nearest neighber is about 1000 feet away, I have no idea where these signals are coming from and how they can achieve such huge signal strengths at range. Unfortunately, they use Channels 1, 6, and 11, so I'm not sure what to set my router to. These signals are also very intermittent; they appear and disappear at random, as if someone is turning their router on and off or are beaming a high gain signal in different directions at different times. Has anyone experienced this kind of interference or know what it could be? Also, will letting my router automatically choose a channel minimize this kind of experience?
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