User`s manual

Windows 3.1 Host Setup
111
The most common print method offered with Windows TCP stacks
is LPR/LPD, a multi-platform remote printing protocol used on
everything from PCs to mainframes. The LPR print setup is very
simplistic, involving only two parameters:
1. NIC IP address. The IP address or host name of the print
server to which you want to print.
2. NIC destination/queue. A pre-defined name on the print
server telling the device to which I/O port to send the jobs. The
standard name for the PRN port is d1prn.
NOTE: This destination name is case sensitive and, by default, all
names are lowercase.