![Redline Communications AN-30e User Manual Download Page 101](http://html.mh-extra.com/html/redline-communications/an-30e/an-30e_user-manual_1429370101.webp)
AN-30e
user manual
70-00035-01
Proprietary Redline Communications © 2004
November
16,
2004
Page 101 of 103
Table 55: Glossary of Terms
Term
Definition
IXC
Inter-exchange Carrier. A long-distance phone company.
LEC
Local Exchange Carriers. The traditional local wired phone company.
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
Modem
MOdulator/DEModulator. A hardware device that converts digital data
into analog and vice versa.
Modulation
Any of several techniques for combining user information with a
transmitter carrier signal.
Multipath
The radio echoes created as a radio signal bounces off objects.
NVRAM
Non-volatile RAM. System parameters are stored in NVRAM. This
data is not affected by powering off the system.
NLOS
Non Line Of Sight. Completely obstructed path between two
antennas.
OFDM
Orthogonal Frequency Division Multiplexing. OFDM spreads data to
be transmitted over a large number of orthogonal carriers.
OLOS
Optical Line Of Sight. A clear direct path between two antennas, with
obstructions within the first Fresnel zone.
Packet
A bundle of data organized in a specific way for transmission. The
three principal elements of a packet include the header, the text, and
the trailer (error detection and correction bits).
PHY
Physical Layer. Provides for the transmission of data through a
communications channel by defining the electrical, mechanical, and
procedural specifications.
PMP
Point to Multipoint
PTP
Point to Point
QAM
Quadrature Amplitude Modulation
QPSK
Quadrature Phase Shift Keying
Receiver
Sensitivity
A measurement of the weakest signal a receiver can receive and still
correctly translate it into data.
RF Radio
Frequency
Rx Receiver
S/N
Signal to Noise Ratio
SINADR
Signal to noise and distortion ratio.
TCP/IP
Transmission Control Protocol/Internet Protocol
The standard set of protocols used by the Internet for transferring
information between computers, handsets, and other devices.
TFTP
Trivial File Transfer Protocol
Tx Transmitter