The gnawing of squirrels and other rodents can damage the cables used in CATV networks. Various solutions have been tried over the years, including lethal toxins, physical barriers and repellents. Read the pros and cons of each of these methodologies to help you pick the approach that works best for you and best keeps critters away from your cables.
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https://www.isemag.com/2019/01/telecom-cable-rodent-chewing-prevention/