Managing the print service

About serial communication settings

Each serial device is controlled by a series of communication characteristics that define the low-level communications with the printer. When you configure a new printer, the default values should be sufficient for most purposes.

The serial communication parameters are:

BAUD: Speed of the serial connection. The default speed is 9600bps.
Parity: The system uses parity for error checking. By default, this field is set to None.
Stop Bits: By default, this field is set to 1.
Character Size: Number of bits (7 or 8) per character. Character size is set to 8 bits by default (not to be confused with font size, which is the size of a printed character in points).

To change these parameters, see ``Adding, modifying, or copying a local printer''.

You can configure additional serial line characteristics using lpadmin(1M) or by editing the print interface file (in the /usr/spool/lp/model directory) directly. See ``Creating printer interface scripts''.

stty(1) summarizes the various characteristics that can be set on a terminal or printer port; however, not all of the characteristics listed in stty(1) are important for printers.