ZyXEL Communications EMG6726-B10A, Руководство пользователя, Страница: 95 / 323

Chapter 7 Wireless
EMG6726/8726-B10A User’s Guide
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Use long preamble if you are unsure what preamble mode other wireless devices on the network
support, and to provide more reliable communications in busy wireless networks.
Use short preamble if you are sure all wireless devices on the network support it, and to provide more
efficient communications.
Use the dynamic setting to automatically use short preamble when all wireless devices on the network
support it, otherwise the EMG uses long preamble.
Note: The wireless devices MUST use the same preamble mode in order to communicate.
7.8.8 WiFi Protected Setup (WPS)
Your EMG supports WiFi Protected Setup (WPS), which is an easy way to set up a secure wireless network.
WPS is an industry standard specification, defined by the WiFi Alliance.
WPS allows you to quickly set up a wireless network with strong security, without having to configure
security settings manually. Each WPS connection works between two devices. Both devices must
support WPS (check each device’s documentation to make sure).
Depending on the devices you have, you can either press a button (on the device itself, or in its
configuration utility) in each of the two devices. When WPS is activated on a device, it has two minutes
to find another device that also has WPS activated. Then, the two devices connect and set up a secure
network by themselves.
7.8.8.1 Push Button Configuration
WPS Push Button Configuration (PBC) is initiated by pressing a button on each WPS-enabled device, and
allowing them to connect automatically. You do not need to enter any information.
Not every WPS-enabled device has a physical WPS button. Some may have a WPS PBC button in their
configuration utilities instead of or in addition to the physical button.
Take the following steps to set up WPS using the button.
1
Ensure that the two devices you want to set up are within wireless range of one another.
2
Look for a WPS button on each device. If the device does not have one, log into its configuration utility
and locate the button (see the device’s User’s Guide for how to do this - for the EMG, see
Section 7.5 on
page 82 ).
3
Press the button on one of the devices (it doesn’t matter which). For the EMG you must press the WPS
button for more than three seconds.
4
Within two minutes, press the button on the other device. The registrar sends the network name (SSID)
and security key through an secure connection to the enrollee.
If you need to make sure that WPS worked, check the list of associated wireless clients in the AP’s
configuration utility. If you see the wireless client in the list, WPS was successful.
7.8.8.2 How WPS Works
When two WPS-enabled devices connect, each device must assume a specific role. One device acts
as the registrar (the device that supplies network and security settings) and the other device acts as the