On Wed, 29 Oct 2003, Patrick Powell wrote:

PP> The HP PJL Reference states categorically that 'PJL ECHO' is not
PP> carried out until the previous job completes.
PP>
PP> Well, it turns out that this is not true - if the previous job has been
PP> rasterized but pages are still moving through the paper path, you get
PP> an echo.  Oh yes,  and if you get a jam, all bets are off.
PP>
PP> The PJL USTATUS command is supposed to return 'Unsolicited Status'
PP> at a specified interval.  It may or may not.  If the printers is off line,
PP> it sends an 'offline' ONCE on some printers.  It may send an 'ONLINE'
PP> or 'PRINTING' message when put back online.

Ok, so there really is no PostScript commands involved here? There are
just PJL commands?

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