distance from the central office exceeds 20 miles (33 kilometers). RJ-11 - Short for Registered Jack-11, a four- or six-wire connector used primarily to connect telephone equipment in the United States. Splitter - \"Splits\" the jack plug two or more ways to allow more than one device to be connected in any one jack. Telco - Telephone Company. Your local telephone service provider. Trouble ticket - A telco \"work order\" used