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Interface Indicator
The interface indicator shows which of the printer’s interfaces is currently active. It uses the
following abbreviations:
PAR Standard bi-directional parallel interface
SER Serial interface (RS-232C/RS-422A)
OPT1 Optional interface 1
OPT2 Optional interface 2
The PAR, SER, OPT1, or OPT2 indicator flashes when the printer is receiving and has received all
the data, and then remains on. The printer gives priority to data coming in over the interface
corresponding to the blinking indicator.
Resolution Indicator
This shows the current printing resolution. The default is 600 dpi (dots-per-inch) in the HP LaserJet
5M and KPDL emulation mode and 300 dpi in other emulation modes. The printer’s resolution can
be selected using the printer’s control panel. (See the last page in this manual.)
2.1. Control Panel