User manual
43
FAQ
noise and is rejected (ignored) by most narrowband receivers.
What is Spread Spectrum?
Spread Spectrum technology is a wideband radio frequency technique developed
by the military for use in reliable, secure, mission-critical communication systems.
It is designed to trade off bandwidth efciency for reliability, integrity and security.
In other words, more bandwidth is consumed than in the case of narrowband
transmission, but the trade-off produces a signal that is, in effect, louder and thus
easier to detect, provided that the receiver knows the parameters of the spread-
spectrum signal being broadcast. If a receiver is not tuned to the right frequency,
a spread-spectrum signal looks like background noise. There are two main
alternatives, Direct Sequence Spread Spectrum (DSSS) and Frequency Hopping
Spread Spectrum (FHSS).
What is WMM?
Wi-Fi Multimedia (WMM) is a group of features for wireless networks that improves
the user experience for audio, video and voice applications. WMM is based on
a subset of the IEEE 802.11e WLAN QoS draft standard. WMM adds prioritized
capabilities to Wi-Fi networks and optimizes their performance when multiple
concurring applications, each with different latency and throughput requirements,
compete for network resources. By using WMM, end-user satisfaction is maintained
in a wider variety of environments and trafc conditions. WMM makes it possible
for home network users and enterprise network managers to decide which data
streams are most important and assign them a higher trafc priority.
What is WMM Power Save?
WMM Power Save is a set of features for Wi-Fi networks that increase the
efciency and exibility of data transmission in order to conserve power. WMM
Power Save has been optimized for mobile devices running latency-sensitive
applications such as voice, audio or video, but can benet any Wi-Fi device. WMM
Power Save uses mechanisms included in the IEEE 802.11e standard and is an
enhancement of IEEE 802.11 legacy power save. With WMM Power Save, the
same amount of data can be transmitted in a shorter time while allowing the Wi-Fi
device to remain longer in a low-power “dozing” state.
What is WPS?
WPS stands for Wi-Fi Protected Setup. It provides a simple way to establish
unencrypted or encrypted connections between wireless clients and access points
automatically. A user can press a software or hardware button to activate the WPS
function, and WPS-compatible wireless clients and access points will establish
connection by themselves. There are two types of WPS: PBC (Push-Button
Conguration) and PIN code.