Proxim Wireless Corporation US5358-GX1 User Manual

hissing sounds that can be transmitted across 
phone lines.

 

multiplexing 

 

The combining of several signals in the same 
communications channel, usually with the aim 
of increasing the amount of data that can be 
transmitted. 

mux 

 

Multiplexer. 

mW  

Milliwatt 

narrowband 

 

Generally, narrowband describes 
telecommunication that carries voice 
information in a narrow band of frequencies. 
More specifically, a specific frequency range set 
aside by the U.S. FCC for mobile or radio 
services, including paging systems, from 50 cps 
to 64 Kbps.  

NMS 

 

Network Management System 

ohm 

The standard unit of electrical resistance in the 
International System of Units (SI). Ohms are 
also used, when multiplied by imaginary 
numbers, to denote reactance in alternating-
current (AC) and radio-frequency (RF) 
applications. 

Ohm's Law is the mathematical relationship 
among electric current, resistance, and voltage. 

oscillator 

 

An electronic device used for the purpose of 
generating a signal. Oscillators are found in 
computers, wireless receivers and transmitters, 
and audio-frequency equipment. 

An antenna consisting of a parabolic reflector 
and a source at or near the focus. A microwave 
dish antenna is an example of a parabolic 
antenna. 

More than one event happening at a time. 

In computers, parallel processing is the 
processing of program instructions by dividing 
them among multiple processorss with the 
objective of running a program in less time. 

parity   

A technique of checking whether data has been 
lost or written over when it has moved from 
one place in storage to another or when 
transmitted between computers. 

polarization 

 

An expression of the orientation of the lines of 
electric flux in an electromagnetic field.  
Polarization is important in wireless 
communications systems. The physical 

orientation of a wireless antenna corresponds to 
the polarization of the radio waves received or 
transmitted by that antenna. 

 

PPP  

Point-to-Point Protocol.   A protocol for 
communication between two computers using a 
serial interface. 

protocol 

 

In information technology, the special set of 
rules that end points in a telecommunication 
connection use when they communicate. 

QAM 

 

Quadrature amplitude modulation.  QAM is a 
method of combining two amplitude-modulated 
(AM) signals into a single channel, thereby 
doubling the effective bandwidth. QAM is used 
with pulse amplitude modulation (PAM) in 
digital systems, especially in wireless 
applications

.

 

QPSK   

Quadrature Phase Shift Keying.  A digital 
frequency modulation technique used for 
sending data over coaxial cable networks. Since 
it's both easy to implement and fairly resistant 
to noise, QPSK is used primarily for sending 
data from the cable subscriber upstream to the 
Internet.  

resistance 

 

The opposition that a substance offers to the 
flow of electric current.

 

RIP  

Routing Information Protocol.  A widely-used 
protocol for managing router information within 
a self-contained network such as a corporate 
local area network or an interconnected group 
of such LANs. 

RMA  

 

Return Material Authorization 

A long-established standard ("C" is the current 
version) that describes the physical interface 
and protocol for relatively low-speed serial data 
communication between computers and related 
devices. 

RU   

Rack Unit 

SELV 

 

Safety Extra Low Voltage. 

serial   

One event at a time. 

 

Radio Frequency 

RSL  

Received Signal Level 

SMA connector   

SMA is an acronym for SubMiniature version A 
and was developed in the 1960's. It uses a 

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