Dell 2350 Wireless Broadband Router - Manual (Page 140)

Select the type of Network your want to setup. Selecting the "Setup a Secure Router" will setup the Dell Wireless 2350
Broadband Router to use WEP to secure wireless connections. If you chose this option the your wireless clients will also need
to use the same WEP settings. To setup a network that does not use encryption select "Setup a Non Secure Router" option.
Follow the onscreen instruction for completing the settings..
Setting up the Network