ZyXEL Communications Corporation G570SV2 Manuel D’Utilisation

Chapter 7 Wireless Screens

ZyXEL G-570S

 v2 User’s Guide

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.

The following sections introduce different ways to improve the performance of the wireless 
network.

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.

The following table describes wireless network terms and acronyms used in the ZyXEL 
Device’s Web Configurator.

Table 12   Additional Wireless Terms

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.