Avaya Configuring Frame Relay Services Manual de usuario Pagina 25

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114058 Rev. A 2-1
Chapter 2
Frame Relay Overview
Frame Relay is a high-speed, packet-switching WAN protocol that connects
geographically dispersed LANs. Frame Relay is usually offered by a public
network provider; however, private organizations can acquire and manage their
own Frame Relay networks as well.
Frame Relay is a connection-oriented protocol, which means that it relies on
existing end-to-end paths between devices connected across the network. It
implements these connections using permanent virtual circuits (PVCs).
A PVC is a logical path the network provides to connect two devices. This path
between the source and destination point is a dedicated connection, so the PVC is
always available to the connected devices. Since many PVCs can coexist, devices
can share the bandwidth of the transmission line.
Figure 2-1 illustrates a Frame Relay network.
Figure 2-1. Frame Relay Network
Router
Frame Relay
Network
Router
VC
VC
Router
VC=virtual circuit
Switch
Switch
Frame Relay defines the interface between
the DTE (router) and the DCE (switch)
Switch
FR0001A
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