Chapter 9 Wireless
NBG7510 User’s Guide
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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 Zyxel Device, see
Section 9.5 on page 113
).
3
Press the button on one of the devices (it doesn’t matter which). For the Zyxel Device you must press the
WiFi
button for more than 5 seconds.
4
Within 2 minutes, press the button on the other device. The registrar sends the network name (SSID) and
security key through a secure connection to the enrollee.
If you need to make sure that WPS worked, check the list of associated WiFi clients in the AP’s
configuration utility. If you see the WiFi client in the list, WPS was successful.
9.9.5.2 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
enrollee (the device that receives network and security settings. The registrar creates a secure EAP
(Extensible Authentication Protocol) tunnel and sends the network name (SSID) and the WPA-PSK or
WPA2-PSK pre-shared key to the enrollee. Whether WPA-PSK or WPA2-PSK is used depends on the
standards supported by the devices. If the registrar is already part of a network, it sends the existing
information. If not, it generates the SSID and WPA2-PSK randomly.
The following figure shows a WPS-enabled client (installed in a notebook computer) connecting to a
WPS-enabled access point.
