From the Start page,

Select Settings > Connections > Wi-Fi

If wireless is turned off, switch it on

The phone will scan for wireless networks,

Click on wifi.csn.khai.edu

On the Configure Wi-Fi page,

Scroll down to Advanced Setting

On the Network Authentication page,

Set Authentication to WPA

Set Data Encryption to TKIP

Click Next

Set EAP type to PEAP

Press the Properties button

This takes you to the certificates page,

Select the Root tab

Scroll down and select the AddTrust External CA Root certificate

Click OK

Click Finish

Your phone will try to connect to wireless and the credentials page will appear,

Set User name to your University login name

Set Password to your University password

Leave the Domain field empty

Optionally select Save password

Click OK

You should now be connected