Comcast, Gateway, models:

COMCAST DIGITAL VOICE	User Manual
DPC3939	Connection Manual
DPC3939B	Quick Start Manual
HOME-5A58	User Manual
WCG200	User Manual
XFINITY SMC-D3GNV	Wireless Network Connection And Troubleshooting Tips
Xfinity DPC3939	Quick Start Manual
machineQ mQHub	User Manual
xFi	Quick Start Manual
xFi Advanced	User Manual