ARRIS DOCSIS 3.0 Residential Gateway with 802.11n/ 4 GigaPort Router/ 2-Voice Lines Certified with Comcast (TG862G-CT) Requires Comcast internet service Item is Cable Modem and Wi-Fi Router and telephony. Cable Supports 2 voice lines, Comcast Xfinity service required Capable of internet download speeds up to 320 Mbps and upload speeds up to 120 Mbps based on your Comcast provided service. Supports both IPv4 and IPv6. USB 2.0 host port Ideal for streaming HD video and gaming on multiple devices at a time Advanced MIMO antenna configuration for optimal throughput and coverage