ZyXEL Communications G-570S, Руководство пользователя

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Chapter 7 Wireless Screens
ZyXEL G-570S User’s Guide
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7.2.5 One-Touch Intelligent Security Technology (OTIST)
With ZyXEL’s OTIST, you set up the SSID and the encryption (WEP or WPA-PSK) on the
ZyXEL Device. Then, the ZyXEL Device transfers them to the devices in the wireless
networks. As a result, you do not have to set up the SSID and encryption on every device in
the wireless network.
The devices in the wireless network have to support OTIST, and they have to be in range of the
ZyXEL Device when you activate it. See
Section 7.9 on page 81 for more details.
7.3 Wireless Performance Overview
The following sections introduce different ways to improve the performance of the wireless
network.
7.3.1 Quality of Service (QoS)
You can turn on Wi-Fi MultiMedia (WMM) QoS to improve the performance of voice and
video applications in the wireless network. QoS gives high priority to voice and video, which
makes them run more smoothly. Similarly, it gives low priority to many large file downloads
so that they do not reduce the quality of other applications.
7.4 Additional Wireless Terms
The following table describes wireless network terms and acronyms used in the ZyXEL
Device’s Web Configurator.
Table 12 Additional Wireless Terms
TERM DESCRIPTION
Intra-BSS Traffic This describes direct communication (not through the ZyXEL Device) between
two wireless devices within a wireless network. You might disable this kind of
communication to enhance security within your wireless network.
RTS/CTS Threshold In a wireless network which covers a large area, wireless devices are
sometimes not aware of each other’s presence. This may cause them to send
information to the AP at the same time and result in information colliding and
not getting through.
By setting this value lower than the default value, the wireless devices must
sometimes get permission to send information to the ZyXEL Device. The
lower the value, the more often the devices must get permission.
If this value is greater than the fragmentation threshold value (see below),
then wireless devices never have to get permission to send information to the
ZyXEL Device.
Preamble A preamble affects the timing in your wireless network. There are two
preamble modes: long and short. If a device uses a different preamble mode
than the ZyXEL Device does, it cannot communicate with the ZyXEL Device.
Authentication The process of verifying whether a wireless device is allowed to use the
wireless network.
Max. Frame Burst Enable this to improve the performance of both pure IEEE 802.11g and mixed
IEEE 802.11b/g networks. Maximum Frame Burst sets the maximum time that
the ZyXEL Device transmits IEEE 802.11g wireless traffic only.