
are no longer supported by Comcast. Comcast refused to enable this "End of Life" modem for new accounts. I had to buy another DOCSIS3.0 modem. This is a list of their supported modems: http://mydeviceinfo.comcast.net/

RCA DCM425 Digital Cable Modem
9 Review

π Zoom DOCSIS 3.0 Cable Modem 5341-02-03H: Fast and Reliable Internet Access
9 Review

MikroTik hAP AC Lite Tower RB952Ui-5ac2nD-TC Wireless RouterBoard
42 Review

π Zoom 3090-00-00 V.92 / V.44 USB External Controllerless Fax Modem: High-Speed Connectivity and Easy Installation
9 Review

π StarTech.com NETRS2321P: 1-Port RS232 to Ethernet IP Converter, Serial over IP Device Server - Black
5 Review

π uni USB C Hub with Ethernet Adapter, 4K HDMI, Gigabit Ethernet, and 3 USB 3.0 Ports for MacBook Pro, iPad Pro, XPS
11 Review

π USR-TCP232-410s: RS232/RS485 Serial to Ethernet Adapter/IP Device Server with DHCP/DNS Support
4 Review

π StarTech.com NETRS232 Serial to IP Ethernet Device Server - DIN Rail Mountable - Serial Device Server - Serial Over IP Device Server (Black)
4 Review