Installation Manual Part 2

Company Proprietary
Adaptive Broadband
U-NII Product Installation Manual 05/29/2001
11-3
Permanent Virtual
Circuit
Provides end-to-end connectivity for
transmission in a network.
Point-to-Point
A single communication circuit connecting two
locations.
Point-to-Multipoint
A communications circuit connecting one
location to many locations.
Radio Frequency
Radio frequency (RF) is a portion of the
electromagnetic spectrum in the frequency
range of 100 kHz to 20 GHz.
Subscriber Unit
The Subscriber Unit (SU) is the part of the
AB-Access System that is installed at the
customer premises and provides
communication with the Base Station (BS).
Synchronous
A data transmission method in which data
transfer is at a fixed rate. The transmitter and
receiver are both controlled by clock pulses.
TCP/IP
Transmission Control Protocol/Internet
Protocol, a layered set of protocols that allows
sharing of applications among PCs, hosts, or
workstations in a high-speed communications
environment. The suite of protocols is
designed to allow communication between
networks regardless of the technologies
implemented in each network.
TDD
Time Division Duplex, the transmission
method where a single channel is used to
alternately carry data in each direction of a
link.
Time-Division
Multiplexing
A form of multiplexing used with digital
signals. A device scans individual channels in
rotation, takes bits from each channel,
transmits the bits in a string (according to a
predetermined sequence), and repeats the
process.
Transmitter
A transmitter is an electronic device,
consisting of oscillator, modulator, and other
circuits, that produce a radio or television
electromagnetic wave signal for radiation into
the atmosphere by an antenna.
Unspecified Bit Rate
Service that operates on a connection basis
and allows for raw cell or best effort transport
by the network. In this service, cells are
transported by the network whenever
bandwidth is available and traffic is presented
by the user. Data using UBR service is more
apt to be discarded during peak traffic times in