$65.87
XBB1-A Back-Up Battery for Arris Xfinity XB6 & Technicolor Panoramic CGM4141 Wireless Gateways (Supports Voice/Phone Only, Not Internet)Amazon$8.99
Keple RJ11 Cable ADSL 10ft Extension Lead Phone Cord Telephone Plug High Speed Xfinity Internet Broadband Male to Male Router and Modem to RJ11 Phone Socket, Microfilter, Landline Wire (White)Amazon$12.99
RJ11 Cable ADSL 50ft Extension Lead Phone Cord Telephone Plug High Speed Xfinity Internet Broadband Male to Male Router and Modem to RJ11 Phone Socket, Microfilter, Landline Wire (White)Amazon$310.64
NETGEAR Nighthawk Cable Modem WiFi Router Combo with Voice C7100V - Supports Xfinity Cable & Voice Plans Up to 600Mbps, 2 Phone lines, AC1900 WiFi.Newegg$349.00
NETGEAR Nighthawk Multi-Gig Cable Modem for Xfinity Voice (CM2050V) – for Cable Plans up to 2.5Gbps - DOCSIS 3.1-2 Phone LinesAmazonSAVE $11.28
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Motorola MT7711 24X8 Cable Modem/Router with Two Phone Ports, DOCSIS 3.0 Modem, and AC1900 Dual Band WiFi Gigabit Router, for Comcast XFINITY Internet and VoiceAmazon