Xerox 4890 Advanced Product Reference - page 53

LPS CONNECTIONS

It is possible for a network connection to the 4890 to use more

than one communication module.  For example, the Shiva

FASTPATH communication module converts AppleTalk protocol

on an AppleTalk network to TCP/IP on Ethernet.  A second

communication module is required to convert TCP/IP to XNS. 

Data streams required by the printer

As previously mentioned, the 4890 LPS supports three data

streams:  line printer, Line Conditioned Data Set (LCDS), and

Interpress.  All other data streams require conversion.

The type of data stream sent to the 4890 printer depends upon

the application software being run on the platforms connected to

the printer. 

Conversion of PostScript data streams

Front end

A large number of the document creation applications available

for 4890 environments (particularly workstation environments)

produce PostScript data streams.  These must be converted to a

format that is acceptable to the printer.  Conversion of PostScript

data streams is done by a front end processor. 

The Entire FIBRE 400/600 front end

The Entire FIBRE front end converts PostScript data streams to

Xerox .IMG files.  The software for FIBRE runs on a Sun

SPARCstation 1+ (FIBRE 400) or SPARCstation 2 (FIBRE 600)

workstation, running SUN OS 4.1 (a UNIX-based operating

system). 

FIBRE 400/600 accepts full color input and converts it to highlight

color output for printing on the 4890 LPS.  This is done by

converting each page of PostScript data to a pair of .IMG files

(one for black, one for highlight color).  The pair of .IMG files is

stored on the printer, then printed with an Interpress print job

that overprints the two files.

XEROX 4890 HIGHLIGHT COLOR LPS PRODUCT REFERENCE

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