APC has a great power strip that has coax protection, phone line protection along with power surge protection. It is only about $40. you can look for it on apc.com but it is cheaper if you can find it at some wholesale internet site.
but I've seen several cases where a cable modem would not acheive block sync when connected through a "cable in/cable out" surge protector.so my concencise is yes get one and see if there is any interferance if not then you can always get a better one.Basically I turn mine off when it is storming out no need to take chances if you get a direct hit I don't care what your using the system is done for.
[*] PUSH TO TEST. RELEASE TO DETONATE.
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