NETGEAR Nighthawk DOCSIS 3.1 Cable Modem Black CM1000-100NAS - Best Buy
Cable Modem Signal Levels revisited – Wolf Paulus
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
General FAQs: SBM1000: Installation with a Cable Modem