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Term
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.
PIR
Peak Information Rate
PMP
Point to Multipoint
PTP
Point to Point
QAM
Quadrature Amplitude Modulation
QPSK
Quadrature Phase Shift Keying
Receiver
A measurement of the weakest signal a receiver can receive and still correctly
Sensitivity
translate it into data.
RF
Radio Frequency
RSSI
Received Signal Strength Indication
Rx
Receiver
S/N
Signal to Noise Ratio
SINADR
Signal to noise and distortion ratio.
SSL
Secure Sockets Layer, a communications protocol, superceded by Transport
Layer Security (TLS).
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
TLS
Transport Layer Security (TLS) and its predecessor, Secure Sockets Layer
(SSL), are cryptographic protocols that provide secure communications on the
Internet for web browsing, e-mail, Internet faxing, instant messaging and other
data transfers.
Tx
Transmitter
UBR
Uncoded Burst Rate
70-00072-01-07
Proprietary Redline Communications © 2008
&
AN-80i
Table 67: Spec. - Glossary
Definition
User
Manual
Page 105 of 106
Sept 18, 2008
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