One CommunicationsWrite a Review203-985-3491Be the first to review!Madison, CT 06443Hi there!Be the first to review!5First-class4Better than most3About what I expected2Not the worst...1DisappointingClick to RateMore Business InfoLargest privately held telephone company in the U.S. Local and long distance, high-speed internet, T1 service, managed services, etc.HoursDo you know the hours for this business?CategoryTelecommunications Services Suggest an Edit