Testing - use tone test set, volt-ohmmeter, diagnose open, shorted, crossed, and split pairs, active circuits, copper cable Category 5e, 6, and 6a certification using handheld testers, optical fiber single mode/multimode using light source/power meter, and OTDR. Build Closets - determine equipment layouts, mount/install backboards, mount/install cross-connects, mount/install racks/patch panels, install optical fiber panels/hardware.