Cisco Cisco Aironet 1240 AG Access Point 설치 가이드

The WEP keys that you use to transmit data must be set up exactly the same 
on your access point and any wireless devices with which it associates. For 
example, if you set WEP Key 3 on your client adapter to 0987654321 and 
select it as the transmit key, you must also set the same value for WEP Key 3 
on the access point. However, the access point does not need to use WEP Key 
3 as the transmit key.

Refer to the Cisco IOS Software Configuration Guide for Cisco Aironet 
Access Points for instructions on setting the access point WEP keys.

Wireless devices attempting to authenticate with your access point must 
support the same security options configured on the access point, such as 
EAP or LEAP, MAC address authentication, Message Integrity Check (MIC) 
WEP key hashing, and IEEE 802.1X versions.

If a wireless client cannot authenticate with your access point, contact the 
system administrator for proper security settings in the client adapter and for 
the client adapter driver and firmware versions that are compatible with the 
access point settings.