Cisco Cisco Explorer Set-top Software Version 2.1 User Guide
749244 Rev G
A physical connection between a DHCT and a hub in which the reverse path can support
multiple reverse data channels
Radio frequency. The range of electromagnetic frequencies above the audio range and below
infrared light. Most wireless transmission uses RF, including radio, TV, satellites, portable
phones, cellular phones, and wireless networks.
Service Application Manager. Associates a specific service with an application that defines the
medium to be used for that service, such as the World Wide Web. The SAM maintains the
application in a specific directory to be used when needed by the DHCTs.
A digital process by which analog information is measured in order to convert analog data to
The set of operating programs that is “permanently” loaded into the DHCT. These programs
are immediately available to the subscriber upon activation of the DHCT.
Switched Digital Video. SDV is a technology that allows cable operators to recover bandwidth
from infrequently-viewed channels, by making these channels "on-demand." Instead of
sending all channels to the set-tops, lightly viewed channels are put into a switching pool and
are only sent to the set-tops when viewers tune to them.
A MR-DVR DHCT that connects to client DHCTs and allows them to play back previously
recorded content from the server DHCT.
System information. A standard set of tables providing the data necessary for a navigation
device to discover and access services.