A DVR (like a cable or satellite box) that uses a FireWire port to connect to an external hard drive for increased storage.
Most modern cable boxes have disabled their FireWire ports or removed them entirely, as HDMI provides a simpler (and more secure for the provider) single-cable solution for audio and video. firewire dvr
: One of the most famous dedicated FireWire DVR units was the Toshiba Symbio A DVR (like a cable or satellite box)