User's Manual

Chapter 2: Introduction
XPress DR+ User Guide 15
XPress DR+ Application Examples
Note: For XPress DR+W application examples, see Chapter 4: XPress DR+W.
Using a method called serial tunneling, the XPress DR+ encapsulates serial data
into packets and transports them over Ethernet. Using two XPress DR+ units,
connected by a network, you can extend virtual serial connections across a
facility or around the world.
Figure 2-2. Example of Serial Tunneling
The internal two-port Ethernet switch allows the XPress DR+ to cascade connections
from a single network drop to another Ethernet device or from one XPress DR+ to
another and another, and so on.