Lexmark T630n VE Reference Manual page 250

%LPR_B%
%LPR_C%
%LPR_D%
%UnknownDevice%
This operator is equivalent to executing the following PostScript emulation
sequence:
currentsystemparams /CurInputDevice get
Error: stackoverflow
jobtimeout
— jobtimeout integer
queries the current user default setting for the JobTimeout parameter. An
integer is returned on the stack:
0
disabled
15...65355
seconds
This operator is equivalent to executing the following PostScript emulation
sequence:
currentuserparams /JobTimeout get
Error: stackoverflow
manualfeed
See page 4-22.
4-44
PostScript