Cisco Headend System Release 2.7
78-745238-01 Rev D
177
A
action safe area
Defined by the Society of Motion Picture and Television Engineers (SMPTE) as an area inside
a rectangle that is placed 12 pixels vertically and 16 pixels horizontally and measures 287 x
215 (in low-resolution systems). Most televisions display text and graphics inside the Action
Safe area. See also Title Safe area.
Application Server
A computer workstation and server used to execute the application programs, which provide
an interface for downloading application data to the DHCTs. The AppServer works in
conjunction with the DNCS and the two computers share a common database.
AppServer
See Application Server.
B
BFS
Broadcast File System. The primary interface (means of communication) between the
AppServer and the DHCTs that are connected to the network.
BFS BIG
Broadcast File System Broadband Integrated Gateway. A device that processes the data it
receives and sends it to the data QAM modulator.
BIG
Broadband Integrated Gateway. A device that provides a data pipeline from the DNCS to the
DHCTs.
C
carousel
Transports data modules and application server processes from the BFS server to the DHCT.
For each new application server process that registers with the BFS, a new data carousel is
created and the ID information is updated in the BFS directory structure. Also known as Data
Carousel or Data Pump.
Channel Map
A set of channels that specific subscribers are authorized to receive through their DHCTs.
Glossary