Redline Communications AN-50e, Руководство пользователя

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AN-50e
user manual
70-00033-01-03 Proprietary Redline Communications © 2005 September 2005
Page 94 of 100
6.5 Glossary Of Terms
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 link master-end system
automatically adjusts the Tx level of subscriber to match a target RSSI
value.
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.
BPSK Binary Phase Shift Keying.
Channel A communications path wide enough to permit a single RF transmission.
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.
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
IF Intermediate Frequency.
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.