Black Box LE3840A Manual page 87

ETHERNET PRINT SERVERS HIGH SPEED AND 4-PORT
IQ provides automatic switching for jobs with different formats. For
example, if you define one IQPORT entry and you have a PostScript printer
and 3 PCL printers, IQ will automatically perform emulation sensing and
route jobs to an appropriate idle printer.
But, if the PostScript printer runs out of paper, jobs could queue up,
eventually seizing all available connections and freezing PCL jobs out until
the PostScript printer is brought back on line. In such a situation, it would be
better to define an IQPORT printer for the PCL jobs and a PORTx printer for
the PostScript printer.
When Not to Use IQ
If you have printers in different areas, it is best to name one printer per port.
When printers are scattered, using IQ would only confuse users since they
wouldn't know where their jobs were going.
Data Formats
lpd maintains a list of data formats supported by the printer attached to each
port. When data is received from a remote lpd, the unit senses whether the
data is ASCII, PCL, PostScript, or Other.
If the data is destined for a specific port (printer name PORTx), and there
is a filter that can convert the data to a format supported by that port (or if no
filter is needed), then the job will be printed. If no filter can be found, the
job is pulled from the network and discarded.
Port configurations can be changed from their default settings by using
nsconfig.
Currently supported filters can provide CR/LF expansion, which allows
ASCII files to be printed by a PCL printer, and ASCII-to-PostScript
conversion. So a port that supports PostScript or PCL can also print ASCII
files.
lpd does not support queue status.
To implement lpd on BSD systems, see the next section. For AIX remote
printing, go to
Section 6.11. For HP/UX remote printing, go to Section 6.8.
Setting Up a BSD Remote Printer to Use lpd
Set up a remote printer on the host that sends jobs to the Ethernet Print
Server using lpd. You will add an entry to the /etc/printcap file on your host
for each printer you use. The steps are described below.
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CAUTION