GLOSSARY
67
Definitions of Terms
10/100Base-T
The IEEE standard for twisted pair Ethernet. Uses telephone wiring and standard
RJ-45 connectors. It is wired in a star configuration and requires a hub.
BOOTP
Boot protocol. The communication protocol used to transfer initialization information
between digital headend network elements and a central server. At power up,
network elements issue a BOOTP request. The BOOTP server receives the request
and responds with a BOOTP reply that specifies startup information and operating
parameters for the requesting device.
BOOTP Reply
Single-packet, multi-field boot protocol message transmitted in UDP by a BOOTP
server to provide a boot image to a network device (BOOTP client).
BOOTP Request
Single-packet, multi-field boot protocol message transmitted in UDP by a network
device (BOOTP client) to request a boot from a BOOTP server.
Conditional Access Table (CAT)
A table carried in the PID1 stream of a transport multiplex that lists the PID numbers
of all EMM streams in a transport multiplex and indexes each EMM stream to an
EMM provider ID.
DAC 6000
Motorola Digital Addressable Controller 6000 used for controlling digital cable
terminals and digital wireless terminals. The name was changed from ACC 4000D in
late 1997.
Forward Error Correction (FEC)
An encoding technique applied to data before transmission to reduce the number of
errors introduced by transmission. The receiving device decodes the FEC to recover
the original data. Data is formatted with extra error detection and correction bits at
the sending end of a transmission. The received bits are used to detect and correct
transmission errors.
Headend Configuration Tool (HCT 1000)
A Motorola PC-based tool for provisioning network devices in a digital CATV headend
or broadband interactive network. The HCT 1000 helps set up embedded code
images, assign IP addresses to network devices, and set up start-up parameters.
Initialization
The process by which digital headend network elements obtain configuration
information and operating parameters at power up. This confirms that all indicators
and constants are set to prescribed conditions. Data is loaded into a new set-top to
