Wilan LIBRA 5800 AP, User Manual

Page: 143 / 156

June 2003 Rev 0 143
SNMP
Simple Network Management Protocol. A protocol used to remotely manage a network element by
polling, setting terminal values, and monitoring network statistics and events. It is the de facto
internet work management standard, designed to provide a mechanism for exchanging management
information in a TCP/IP-based Internet environment.
SNMP NMS Trap IP Address
This is the address to which all the alarms and event messages are sent.
spectrum analyzer
An instrument that captures RF energy and displays its amplitude and frequency on a screen.
spread spectrum (SS)
Any of a group of modulation formats in which an RF bandwidth much wider than the signal
bandwidth is used to transmit data, resulting in a greater immunity to noise interference.
straight-through cable
A straight-through cable is wired the same at both ends. That is, pin one connects to pin one, pin two
to pin two, and so on. Straight-through cables are used to connect an IDU to a PC.
system gain
The maximum path loss that the system can support and produce usable data transmission.
system image file
The Access Point uses system image files to store system configuration settings. The default system
image file is called the factory image and is used when the units are first powered up.
T
telnet
An Internet communications protocol that enables a computer to function as a terminal working on a
remote computer. A computer with a network connection to an Access Point can telnet to any of the
units and access their configuration menus.
U
uptilt
See downtilt.
V
VSWR (Voltage Standing Wave Ratio)
VSWR is the voltage ratio of minimum to maximum across a transmission line. A VSWR of 2.0:1 or
less in an antenna is considered effective. Most antennas have a VSWR of 1.5:1. For example, when
using a radio with a four-watt output with an antenna VSWR of 1.5:1, the reflected power will be 160
milliwatts.