Lenovo ThinkPad T400s series User Manual page 31

Wireless networking setup
To use the built-in wireless networking card (the 802.11 standard) to communicate, start Access Connections™.
To start the Access Connections wizard, click Start --> All Programs --> ThinkVantage --> Access Connections, and follow the instructions
on the screen.
Note: Before you start setting up wireless networking connections by using Access Connections, obtain a Network Name (SSID) and your
encryption information from your network administrator.
Access Connections, a connectivity assistant program, can easily enable one network adapter and disable the other adapters on demand. After
setting up your wireless networking connection, you can use the program to quickly switch the network settings.