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? What is the insurance coverage of the Equipment Protection Program? What does 4,500A / 15,000A / 30,000A etc. mean in the surge protection devices? Does the surge protection also exist when the switch of the power strip is not switched on? How are our RJ-45 jacks assigned for surge protection?