The disclosure relates to modem and router modules for use with digital display systems, including televisions. A modem module is configurable to attach to a set-top box, a set-back box, directly to a digital display, or may even be integrated into display equipment. Router functions and ports can be integrated into the module to provide for networking of additional devices in proximity to the module and/or display, using either or both wired and wireless access technologies. Systems including the module convert power to the appropriate forms for delivery to the different devices, hardware, and components associated with the module. The modem and routing functions are configurable to provide separate security domains to isolate or direct traffic among the various networked devices.