Low-fat dairy foods linked to Parkinson's risk, study suggests New research links three servings of low-fat dairy a day with a slight increase in Parkinson's disease, but more research is needed to better understand the findings. iStockphoto. Though you might think eating low-fat dairy foods is a healthy move, new research suggests the habit is tied to a slight rise in the risk of .
National Standards. Communications wiring standards are defined by a number of national and international agencies, including the Electrical Industries Association (EIA), the Telecommunications Industry Association (TIA), the Institute of Electrical and Electronics Engineers (IEEE) and the National Electrical Manufacturer's Association (NEMA).
Each connection on twisted pair requires both wires. Since some telephone sets or desktop locations require multiple connections, twisted pair is sometimes installed in two or more pairs, all within a single cable. For some business locations, twisted pair is enclosed in a shield that functions as a ground.