Avocent Cyclades-PR2000 2 PUBLIC X.25 NETWORK EXAMPLE, Router / DTE, Switch / DCE

Cyclades-PR2000

Modem or

DSU/CSU

Router / DTE Router / DTE

Switch / DCE Switch / DCE

X.25

FIGURE 8.2 PUBLIC X.25 NETWORK EXAMPLE

X.25

A Cyclades Router can act either as a DTE (Data-terminal Equipment) connected to a public X.25 network or as a DTE or DCE (Data circuit-terminating Equipment) as part of a private X.25 network. The first case is discussed in this chapter. The second case is described in the CyROS Reference Guide. Both Permanent Virtual Circuits (PVCs) and Switched Virtual Circuits (SVCs) can be defined. A PVC requires that two DTEs be permanently connected.

STEP ONE

First, the general X.25 protocol parameters are set in the X.25 Menu. A detailed description of the X.25 parameters and their values for the example is provided in the table below.

Chapter 8 - Data-Link Protocols (Encapsulation) 60