Amazon.com: NETGEAR Cable Modem with Voice CM500V - For Xfinity by Comcast Internet & Voice | Supports Cable Plans Up to 300 Mbps | 2 Phone lines | DOCSIS 3.0, Black, 16x4 w/ Voice (CM500V-100NAS) : Electronics
Digital Voice Modems
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Nighthawk Cable Modem with Voice (CM1150) | eBay
Amazon.com: 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 Voice : Electronics
NETGEAR Nighthawk AC1900 WiFi DOCSIS 3.0 Cable Modem Router - For XFINITY Internet & Voice – (C7100V) - Walmart.com
Best Buy: NETGEAR Nighthawk 32 x 8 DOCSIS 3.1 Voice Cable Modem, Voice support Black CM1150V-100NAS
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Netgear Nighthawk C7100V AC1900 WiFi Cable Modem Router for XFINITY Internet and Voice review: Netgear combines cable modem, Wi-Fi and voice service in a new gateway for Comcast - CNET
Motorola Ultra-fast Docsis 3.1 Cable Modem With Ac3200 Dual Band Router - (mg8702) : Target