Lexmark C762 - Manual (Page 206)

PostScript
4-29
%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 4-7.