Telnet to the printer ip. You may have to specifiy the port 9100.
For example to change the front dispaly panel telnet to the printer and type @PJL RDYMSG DISPLAY=“MESSAGE”
PJL Commands
This section lists the available commands for the printer job language mode (PJL). For more information on PJL, refer to the Printer Job Language Technical Reference Manual from Hewlett-Packard.
COMMENT
@PJL COMMENT [words] [<CR>] <LF>
DEFAULT
@PJL DEFAULT [LPARM: ***] variable = value [<CR>] <LF>
DINQUIRE
@PJL DINQUIRE [LPARM: ***] variable [<CR>] <LF>
ECHO
@PJL ECHO [Words] [<CR>] <LF>
ENTER
@PJL ENTER LANGUAGE = *** [<CR>] <LF>
EOJ
@PJL EOJ [NAME= ***] [<CR>] <LF>
INFO
@PJL INFO read only variable [<CR>] <LF>
INITIALIZE
@PJL INITIALIZE [<CR>] <LF>
INQUIRE
@PJL INQUIRE [LPARM: ***] variable [<CR>] <LF>
JOB
@PJL JOB [NAME = ***][START = ***][END = ***][<CR>] <LF>
OPMSG
@PJL OPMSG DISPLAY = *** [<CR>] <LF>
RDYMSG
@PJL RDYMSG DISPLAY = *** [<CR>] <LF>
RESET
@PJL RESET [<CR>] <LF>
SET
@PJL SET [LPARM: ***] variable = value [<CR>] <LF>
STMSG
@PJL STMSG DISPLAY = *** [<CR>] <LF>
UEL
<ESC>%-12345X
USTATUS
@PJL USTATUS variable = value [<CR>] <LF>
USTATUSOFF
@PJL USTATUSOFF [<CR>] <LF>
PJL
@PJL [<CR>] <LF>
