Welcome to our forum.
The only downside I can see is that if our power goes out, so does the phone service- but we have several cell phones so that doesn't scare me too much.
Thanks for the info. I just scheduled install for the end of the month. The person at the cable company did ask me if I had a security system, which I do not. But it's good to know for the future.
Having a battery backup on the cable modem is important, but what service level does the cable company guarantee. Around here, the phone company uses standby generators on the central offices and neighborhood DLC's. The cable company does not. So, in the event of an extended power outage (>5hrs.) the cable phones go down and the phone company phones stay working. We get ice storms and this is an issue here. I negotiated the phone service contract for one of my customers and this was a huge thing to them. They provide emergency services. Just something to consider...