Dell 3100cn Color Laser Printer User Manual page 172

Tray
RAM Disk Specifies whether to allocate memory to the RAM Disk file system for the Secure Print and Store Print features.
This item is only available when the optional memory card is installed.
Substitute Tray Specifies whether or not to use another size paper when the paper that is loaded in the specified tray does not match the paper
size settings for the current job.
Parallel Settings
Purpose:
To configure the parallel interface.
Values:
ECP Specifies the ECP communication mode of the parallel interface.
Adobe Protocol Specifies PostScript communication protocol for each interface.
Network Settings
Purpose:
To Specify the PostScript communication protocol for this printer.
Values:
Adobe Protocol Specifies PostScript communication protocol for each interface.
USB Settings
Purpose:
To change printer settings affecting a USB port.
Values:
Adobe Protocol Specifies PostScript communication protocol for each interface.
PCL Settings
Purpose:
To change printer settings that only affect jobs using the PCL emulation printer language.