Type of cable is a term used to describe the various types of cables used in electrical wiring and data transmission. The three most common types of cable are BASIC, COAX, and JUMPER. BASIC cables are five-letter cables that are used for low-voltage applications such as connecting computers to modems or routers. COAX cables are four-letter cables that are used for high-frequency signals such as television and radio transmissions. JUMPER cables are six-letter cables that are used to connect two points on a circuit board or other electronic device.