How does the protection work when passing TV and telephone. or data lines ? December 05, 2022 12:56 Updated As explained under the function of a surge device, but using protection elements suitable for the high data rates. Related articles How does a surge protection device work? Does the surge protection also exist when the switch of the power strip is not switched on? What does 4,500A / 15,000A / 30,000A etc. mean in the surge protection devices? What is the insurance coverage of the Equipment Protection Program? What does it mean when the green indicator light is off on surge protection power strips?