Fluke Networks TS54-BANA Premium Voice Data and Video Telephone Test Set with TDR, Extra-Large Alligator Clips and Test Probe, 4mm Banana Incorporates a TDR, tone generator, and telephone test set for testing VDV cabling as well as POTS quality on live DSL lines without disrupting data services Available with various line cord connectors to suit specific applications TDR measures cable length and locates faults on twisted pair and coaxial cable as well as parallel conductors, and analog tone generator has five distinct cadences for isolating individual wire pairs Telephone test set detects dial tone and polarity, places and receives calls, indicates line voltage and current, verifies call waiting service, and has a speakerphone for hands-free conversation High-visibility glow-in-the-dark keypad with standard dialing keys and function keys, plus a backlit LCD for tracking functions and test status