HP X.25/9000 Programmer's Guide

4 Chapter1
Introduction to X.25 Programmatic Access
X.25 Product Description
Figure 1-2 Back-to-back Configuration
The term “remote” is used to designate a distant DTE. A remote host can
be a few feet or thousands of miles away from the local DTE.
X.25 allows for the creation of multiple virtual connections over the same
connection to a PSN. Each connection is called a virtual circuit (VC).
X.25 can multiplex up to 4095 VCs (CCITT) over a single physical
connection to a DCE. The X.25 PSN can route each VC to a different
remote host. From the point of view of the application, each VC is
directly connected to the remote host.
NOTE In a back-to-back configuration, all VCs must be connected to the same
remote host.
HP 9000 Remote Host
Modem
Eliminator
DTE
X.25
DTE
X.25
DCE
or
36960-90061.bk Page 4 Friday, November 10, 2000 3:42 PM