Install Manual

Axxcelera Broadband Product Install Manual Page 66 of 71
Glossary
TERM DEFINED
Access Point
An Access Point (AP) is a component of a Base Station (BS) that
contains the antenna used to communicate with a Subscriber Unit
(SU).
Anchor Switch
The Anchor Switch (AS) is an ATM access switch that is a
component of a Base Station (BS).
Antenna
A device for transmitting and/or receiving radio waves.
Asynchronous
A
data transmission method in which data may be sent at irregular
intervals (without reference to clock signals).
ATM
Asynchronous Transfer Mode is a high-performance, cell-oriented
switching and multiplexing technology, which utilizes fixed-length
packets to carry different types of traffic. It integrates the
multiplexing and switching functions, is well suited for bursty
traffic, and allows communications between devices that operate
at different speeds.
ATM Switch
The ATM switch provides layer 2 switching of ATM cells through
virtual circuits. An ATM switch is contained in the SU, the AP, and
the AS.
Available Bit Rate
(ABR)
Service that provides rate-based flow control and is aimed at data
traffic such as file transfer and e-mail.
Azimuth
The angle along the horizon usually referenced to north.
Bandwidth
The data carrying capacity of a communications channel,
measured in Hertz as the difference between the highest and
lowest frequencies of the channel.
Base Station
The Base Station is the part of the AB-Access System that sends
signals to and receives signals from the Subscriber Units (SUs) to
enable communication with the WAN.
Baud
A measure of data transmission speed. The baud rate denotes the
number of symbols per second.
Bit Error Rate
The Bit Error Rate (BER) is the fraction of transmitted bits that are
received in error.
Cell
A 53-Byte packet of data used in ATM networks. Also used to
refer to the coverage area of one Base Station.
Constant Bit Rate
(CBR)
Service that operates on a connection basis and offers consistent
delay predictability; used for applications such as circuit
emulation, voice, and video.
Control Server
The Control Server (typically one per BS) is a computer
responsible for management of the BS, its APs, and the
associated SUs.
DS1
A data transmission rate of 1.544 Mbps, also referred to as a T-1.
DS3
A data transmission rate of 45 Mbps