Fluke Networks Cable fault finder with PowerBT™ Bridge Tap Detect provides open/short circuit detection—to 8,000 feet (2.4 km) and locates multiple bridge taps up to 3,200 feet (975 m) of cable, built-in toner has five tones and patented SmartTone®for exact pair identification, reports AC/DC voltage on any two conductor, telephone, security wires, or coax cables.