Xerox 4890 Advanced Product Reference - page 52
LPS CONNECTIONS
Communication protocols required by the printer
The 4890 LPS supports the following protocols:
•
IBM 3211 and 4245 channel protocols
•
DDCMP protocol (through the XPMF-VMS interface)
•
Xerox 871 protocol (through the OEM interface)
•
Xerox Network Services (XNS) protocol on Ethernet (for
network connections).
All other protocols require conversion.
Converting protocols for online connectivity
The communication protocols for many non-IBM compatible
mainframe platforms can be converted to allow printing on the
4890. This conversion is done through the use of an optional
interface. Communication protocols compatible with
Dataproducts, Centronics, and many other printers can be
converted by third-party interfaces into protocols that the 4890
can accept. Refer to the “Third-party connectivity products
appendix for a list of third-party interfaces.
Converting protocols for network connectivity
Communication module
The conversion of network communication protocols requires
the use of a communication module. A communication module
is a bridge or gateway that enables a path from a network to
equipment outside of that network. The path may be from one
network to another network, or from the network to a device,
such as a mainframe or printer.
Ethernet LANs using protocols other than XNS require a bridge
that converts the other protocol to XNS. For example, if an
Ethernet LAN uses the TCP/IP communication protocol, a bridge
is needed to convert TCP/IP to XNS. The network connections
on either side of the bridge are Ethernet, but the communication
protocol has been converted.
Non-Ethernet LANs require a gateway that enables a path from
them to an Ethernet LAN and that converts their communication
protocols to XNS.
Figure 4-6.
Communication modules
Non-Ethernet protocol
XNS protocol
Ethernet protocol
other than XNS
Non-Ethernet LAN
Ethernet
Ethernet
To
printer
From
network
citizen
Communication module
(gateway)
Communication
module (bridge)
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4-10
XEROX 4890 HIGHLIGHT COLOR LPS PRODUCT REFERENCE