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my alarm system is wired to the landline and also it has a cellular backup so incase someone cuts the phoneline
maybe you can just go that route
also if you have cable see if they offer tel service too
my cable company offered it to me for 15 dollars a month. (brighthouse)
they said it works just like a reg phone, can have same number etc etc 911 works
i would still have a cellular backup for it otherwise its easy for a burglar to cut phonelines
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