Lenovo ThinkPad T400s series User Manual page 32

Checking wireless connection status
You can check the signal strength and status of your wireless connection either by opening Access Connections™, or by double-clicking the Access Connections wireless status icon in the
system tray.
The Access Connections wireless status icon displays the signal strength and status of your wireless connection.
Wireless status icon states: wireless LAN
Power to the wireless radio is off.
Power to the wireless radio is on. The signal strength of the wireless connection is excellent.
Power to the wireless radio is on. The signal strength of the wireless connection is marginal.
Power to the wireless radio is on. The signal strength of the wireless connection is poor. To improve signal strength, move your system closer to the wireless access point.
Note: If you have trouble in making a connection, try moving your computer closer to your wireless access point.
Wireless status icon states: wireless WAN
Power to the WAN radio is off.
No association
No signal
Signal level 1
Signal level 2
Signal level 3