LPS CONNECTIONS
Interface options
There are three primary interface options for the 4890:
•
Network. Printer is one of many network citizens
•
Offline. Printer is connected to a magnetic tape drive
•
Online. Printer is connected to a host with these online
connections:
— Direct
— Remote.
There are optional interfaces available that allow the 4890 to have
an online connection with a number of different mainframe
environments. The types of interface options available are
discussed in this chapter.
Communication protocols
Workstation environments and some mainframes are connected
to the 4890 LPS by means of a local area network (LAN). The
4890 can be connected directly to an Ethernet LAN using Xerox
Network Services (XNS) protocol. Ethernet LANs using a
protocol other than XNS require a bridge that can convert the
protocol used to XNS. In addition, non-Ethernet LANs require a
gateway that converts to Ethernet. Communication module
requirements for LAN environments are discussed in greater
detail later in this chapter.
Data streams
The following data streams are supported by the 4890 LPS:
•
Line printer
•
Laser conditioned data set (LCDS) may include Xerox DJDE
and metacode commands
•
Interpress.
These three data streams are accepted directly by the 4890
without conversion. Any other data stream must be converted
before it is accepted by the printer.
Many workstation applications and a few mainframe applications
produce PostScript data streams. The 4890 LPS does not support
PostScript directly, but it is possible to convert PostScript data for
highlight color printing on the 4890 with a front end processor.
4-4
XEROX 4890 HIGHLIGHT COLOR LPS PRODUCT REFERENCE