How to access your Motorola Surfboard modem and understand signal levels.
Amazon.com: Motorola MG7550 - Modem with Built in WiFi | Approved for Comcast Xfinity, Cox, Spectrum | For Plans Up to 300 Mbps | DOCSIS 3.0 + AC1900 WiFi Router | Power Boost Enabled : Electronics
Quick Start
General FAQs: SB6121: GUI Access
How do I set-up Port Forwarding on my Motorola Cable Modem Gateway? – Motorola Mentor