Dell 2135cn Color Laser Printer - Manual (Page 208)

A USB port requires a USB cable. Ensure that you match the USB symbol on the cable to the USB symbol on the printer.
Plug the other end of the cable into a USB port at the back of the computer. Do not plug it into the USB keyboard.
Turning On the Printer
1. Connect the power cable to the printer and plug it into a power source.
Do not use extension cords or power strips.
The printer should not be plugged into a UPS system.
2. Turn on the computer and the printer. When you use the USB cable, the USB driver is automatically installed.
Connecting the Printer to the Network
To attach the printer to a network:
1. Ensure that the printer, computer, and any other attached devices are turned off and unplugged.
2. Connect the printer to the network using an ethernet cable.
1 USB port