A good multimeter is a must. You can use this to test for voltage, opens, shorts. this kit gives you the ability to verify the electrician wired the receptacle correctly before you plug in you server, computer, or other active device.
Trace wire paths and identify cables in all common wiring systems. Diagnose common problems in telephone, data, and security wiring Check for open or shorted wire pairs and confirm the presence of telephone service Simple operation with audible and visual tone signal indication; provides two distinct tone signatures and LED tone proximity indicator illumination. Includes nylon pouch; easily transport your tone tracing kit in a rugged and secure nylon pouch
<
Complete set of connector types standard (telephone, LAN and Coax). The nested remote allows end-to-end testing of all wiring types. Simple testing of LAN wiring and phone lines. Detection of common wiring and connector errors.
A great way to check continuity on your fiber optic cable BEFORE you install it or to verify and existing fiber strand. If the light makes it through you have continuity. It will not test for attenuation.