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Chapter 3. Terminal Menu Operation and Structure
» Configuration/Frame Relay
Frame Relay is a connection-oriented service requiring circuits to be
configured by your carrier to establish a physical link between two or
more locations. Multiple virtual circuits (which appear as virtual
point-to-point links) can be run through the same physical connection.
There are two types of virtual circuits supported in Frame Relay: Per-
manent Virtual Circuits (PVC) and Switched Virtual Circuit (SVC).
PVCs are like dedicated point-to-point private lines. Since the physi-
cal connection is always there in the form of a leased line, call setup
and tear down is done by a carrier via a network management system.
SVCs require setup and tear down and are generally not available
from Frame Relay carriers. Virtually all Frame Relay communications
is done using PVCs. The Express L128FP supports PVCs only.
A number called the Data Link Connection Identifier (DLCI) identifies
each virtual circuit within a shared physical channel.
Figure 3-8 shows the Frame Relay menu.
Figure 3-8. Configuration/Frame Relay Screen
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Express L128FP User Manual
61202070L4-20
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