Printer port characteristics

Printer port characteristics are attributes defined with the -o "stty='stty-option-list'" option of the lpadmin command.

Printers connected directly to computers and those connected over some networks require that the printer port characteristics be set by the interface program. These characteristics define the low level communications with the printer. Included are the baud rate; use of XON/XOFF flow control; 7, 8, or other bits per byte; type of parity; and output postprocessing. The standard interface program uses the stty command to initialize the printer port, minimally setting the baud rate and a few other default characteristics.