Dell 2335DN - Manual (Page 275)

5.
Load paper in the optional tray 2. For information about loading paper in this tray, see "Loading Paper" . 6.
Reconnect the power cord and cables and then power the printer on. 7.
After installing the optional tray 2, printer drivers will automatically sense tray 2.
Installing Wireless Network interface card
The machine is equipped with a network interface which allows you to use your printer on a network. You
can also purchase a wireless network interface card to enable the use of the printer in wireless network
environments. For information about installing the network printer server, see the network printer server
user's guide.
For information about installing the wireless network interface card and configuring the network parameters,
refer to Wireless Network Quick Install Guide.