Most users want (and should) protect their valuable equipment. Surge suppressors, which are also known by other names such as surge protectors, noise suppressors, transient filters, line filters and TVSS (Transient Voltage Surge Suppressor), protect your equipment by removing noise and spikes coming from the power grid – and sometimes also from the telephone line and from the satellite or cable TV line, if you have a suppressor with this option. But how do they work? What components do they have inside? How can you differentiate a good product from a bad product? Read on.