Review: Comcast's xFi Advanced Gateway has detailed insights for your home network
Xfinity Voice | SURFboard
Motorola MT7711 24x8 DOCSIS 3.0 Modem + AC1900 Router for Xfinity Internet & Voice Black MT7711 - Best Buy
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
Amazon.com: ARRIS DOCSIS 3.0 Residential Gateway with 802.11n/ 4 GigaPort Router/ 2-Voice Lines Certified with Comcast (TG862G-CT) : Electronics
Xfinity Internet and WiFi Connection Troubleshooting - Xfinity Support
How to Set Up your Xfinity xFi Gateway Modem - YouTube