The print.spd configuration file
For each port, transparent printing is controlled by an entry in the print.spd file. The print.spd file is found in the /etc/ directory on your system. The entry for each port includes definitions of the terminal type, transparent print throughput rate, device name. The content of the print.spd file is normally controlled automatically by either the Port Configuration utility (SCO OpenServer). A sample entry from a typical print.spd file is shown in the next example.
Maximum number of characters per second throughput for transparent printing
Terminal type of terminal to which your printer is attached defined in the printcap.spd file.
100 unknown ttyz1 -ixany -ixon
Device name
Enables flow control for Transparent printing.
Enables sending of data on receipt of the next character (when flow control is enabled on the transparent print port).
UltraPort Serial Adaptors User Guide
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