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I have had my TC-7610 modem for several months now, and during the last month or so I've been having intermittent problems with the connection getting dropped. Restarting the modem by unplugging and plugging it back in fixes the problem, until it happens again. Sometimes I can go days with no problem, other times it loses it's connection several times a day. I am using this modem with my Cox Cable internet service, and use it on a variety of devices, including a Windows 10 PC, and via WiFi on a Roku box, Amazon Echo, smart phone, etc.

I previously used a modem rented from the cable provider, and did not have this problem.