User manual

AN-80i User Manual
70-00072-01-10 Proprietary Redline Communications © 2011 Page 150 of 152 March 2, 2011
9.8 Glossary Of Terms
Table 79: 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.
Beamwidth The angle of signal coverage provided by an antenna.
BFW Broadband Fixed Wireless
Bps Bits Per Second. 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 use 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.
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.
LED Light Emitting Diode
LOS
Line Of Sight. A clear direct path between two antennas, with no obstructions
within the first Fresnel zone.
MAC
Media Access Control. A unique number assigned to a network device.
Corresponds to ISO Network Model Layer 2 data link layer.
MHz Megahertz. 1,000,000 Hz
4Gon www.4Gon.co.uk [e-mail] Tel: [phone] Fax: [phone]