Spectrum Arris modem has been turning off a few minutes after booting up (not restarting). All the lights turn off including the power light, even though all cables are plugged in, so
Optimum Approved Business Modem Docsis 3 Phone EMTA
ARRIS SURFboard 16x4 Cable Modem / AC1600 Dual-Band WiFi Router. Approved for XFINITY Comcast, Cox, Charter and most other Cable Internet providers for plans up to 300 Mbps. - Walmart.com
ARRIS SURFboard DOCSIS 3.0 Cable Modem / N600 Wi-Fi Dual-Band Router. Approved for XFINITY Comcast, Cox, Charter and most other Cable Internet providers for plans up to 150 Mbps.(SBG6580) - Walmart.com
Up to 13.5 million Arris modems vulnerable to reboot attacks • Graham Cluley
ARRIS SURFboard 24 x 8 DOCSIS 3.0 Voice Cable Modem with AC1750 Dual-Band Wi-Fi Router for Xfinity White SVG2482AC - Best Buy
File:ARRIS CM820B DOCSIS Cable Modem.jpg - Wikipedia
Arris Wireless Wifi Modem/Router for Office High Speed Network Connection AP | eBay