SMC Networks Xfinity DOC SIS 3.0 Cable Modem SMCD3GNV Whole home distribution of digital content and networking of digital devices made easy with UPnP certication. Includes a Packet Cable 1.5 eMTA and two voice ports, and software is upgradeable to Packet Cable 2.0 Includes a four port 10/100/1000 router including SPI rewall and provides for Port Triggering, Port Forwarding, parental controls, and other features. Includes 2 FXS voice ports which can be used for Voice or Home Security and Automation services Support for 1 USB 2.0 host port is provided. Internal server support for Print Server and File Server allows for connecting to USB hard drives and peripherals.