New houses are all VOIP. I have my cable modem on a UPS so the internet and phone still worked during a local blackout. Laptops with a battery worked for several hours and internet up for several hours until all the batteries died. have two UPS boxes, and one was used for powering phones when their batteries ran low as well.
You might want to think about a UPS for the cable model and the VOIP phone just in case.
sportsguy
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