Redline Communications Inc. AN80IB 用户手册
User
AN-80i
Manual
70-00072-01-06a
Proprietary Redline Communications © 2008
Page 94 of 96
June 1, 2008
7.5
Glossary Of Terms
Table 52: Spec. - Glossary
Term Definition
Antenna
Gain
The measure of antenna performance relative to a theoretical antenna called an
isotropic antenna.
ARQ
Automatic Repeat Request. This is the protocol used over the air for error
correction.
ATPC
Automatic Transmission Power Control. The sector controller-end system
automatically adjusts the RF transmit level of both systems to optimize
performance of the link.
performance of the link.
Beamwidth
The angle of signal coverage provided by an antenna.
BFW
Broadband Fixed Wireless
Bps
Bits Per Second
A unit of measurement for the rate at which data is transmitted.
A unit of measurement for the rate at which data is transmitted.
BPSK
Binary Phase Shift Keying
Channel
A communications path wide enough to permit a single RF transmission.
CIR
Committed information rate
dB
A ratio expressed in decibels.
dBi
A ratio, measured in decibels, of the effective gain of an antenna compared to
an isotropic antenna.
dBm
Decibels above a milliwatt
DFS
Dynamic Frequency Selection (DFS) can detect interference from other devices
using the same frequency (especially radar) and automatically take a pre-
selected action such as disable transmission or relocate transmission to
alternative frequency.
selected action such as disable transmission or relocate transmission to
alternative frequency.
DHCP
Dynamic Host Configuration Protocol. A DHCP server automatically issues IP
addresses within a specified range to devices on a network.
Directional
Antenna
An antenna that concentrates transmission power into one direction.
Encryption
For the purposes of privacy, the transformation of data into an unreadable
format until reformatted with a decryption key.
Ethernet
A LAN architecture using a bus or star topology
FD
Full Duplex. Refers to the transmission of data in two directions simultaneously
(i.e. a telephone)
FWA
Fixed Wireless Access
Gain
The ratio of the output amplitude of a signal to the input amplitude of a signal.
Typically expressed in decibels (dB).
Gateway
A network point that acts as an entrance to another network.
GHz
Gigahertz. 1,000,000,000 Hz, or 1,000 MHz
GUI
Graphical User Interface
IP
Internet Protocol. See TCP/IP.
Isotropic
A theoretic construct of an antenna that radiates its signal 360 degrees both
vertically and horizontally—a perfect sphere. Generally used as a reference.
IXC
Inter-exchange Carrier. A long-distance phone company.
LEC
Local Exchange Carriers. The traditional local wired phone company.
LED
Light Emitting Diode