Page 45
Series 2000/3000 IDU User’s Manual
Revision P4
RBDC
Rate-based dynamic capacity. The return link rate-based capacity that is requested dynam-
ically by a SIT and assigned by the Hub.
Return link
The path carrying communication from SITs to the gateway. It uses a multi-frequency
time-division multiple access (MF-TDMA) scheme carrying ATM or MPEG cells.
RL
Return link.
RLSS
Return link sub-system. The part of the gateway responsible for receiving return link com-
munication from SITs and relaying it to terrestrial networks (e.g. the Internet). It also man-
ages all aspects of return link communication, including SIT logon, SIT synchronization,
and allocation of return link capacity.
Rx
Receive.
S/W image
Software image. A file containing IDU software that is downloaded and installed in the
IDU.
Satellite interactive
terminal
See SIT.
Satnetwork page
The section of the IDU web interface used for initial satellite network configuration of the
IDU.
SIT
Satellite interactive terminal. SITs in a DVB-RCS system are connected, via satellite links,
with a hub. They provide remote access to the Internet and perhaps other networks at the
hub. SITs are made up of an outdoor unit (ODU) and an indoor unit (IDU).
SSL
Secure socket layer encryption. SSL protects data sent and received by a web browser
from unauthorized viewing or modification.
Static user
The username and password used by the SIT for RADIUS authentication. Each SIT has
one static user username and password.
Superuser page
A section of the IDU web interface used for operation and maintenance of the IDU.
SYNC
Synchronization Burst, used by the SIT to log on to the satellite network.
TDMA
Time-division multiple access.
Traffic
User data sent over the satellite network forward or return links.
Traffic Queue
See Queue.
Transmitter
Also called the BUC. The part of the ODU responsible for generating the return link sig-
nal.
Tx
Transmit.
ULPC
Uplink power control.
VBDC
Volume-based dynamic capacity. The return link volume-based capacity that is requested
dynamically by a SIT and assigned by the Hub.
VCC
Virtual Channel Connection.
VCI
Virtual Channel Identifier.
VoIP
Voice over IP.
VPI
Virtual Path Identifier.
Web interface
The IDU web interface provides the user interface with the IDU. The IDU web interface
