MOM is a low cost mini fault detector senses magnetic wave from thumper and brightly locates location. Walk the cable route to "see" thumper signal pass; general location of fault is indicated where signal falls off. LED bar graph shows clearly in the dark. One hand operation with MOM slung from neck; single control operation. Many faults located in one pass; especially effective in downtown network systems. Small enough to fit in a jacket pocket, the MOM comes with a 9V battery that provides 75-100 hours of continuous service. A ruggged but light nylon case, slung from the neck, allows one-hand operation and protects the instrument. The MOM is microprocessor controlled, operates well in extreme temperatures and has no moving parts.