Lexmark X644e User Guide

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PJL
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Unique PJL Commands
To determine which commands your printer supports, see “Table B-16: Lexmark 
Unique PJL Commands” on page B-30.
LBEEP Command
This command causes the printer to beep three times.
Syntax:
@PJL LBEEP[<CR>]<LF>
LPORTROTATE Command
This command causes the printer to rotate ports at the next job boundary. The 
information to rotate ports is specified in the job header. For example, the printer could 
switch from parallel interface to serial interface between jobs.
Syntax:
@PJL LPORTROTATE[<CR>]<LF>