Avocent Access Router Cyclades-PR2000 Manuale Utente Scaricare il pdf (Pagina 60)

Cyclades-PR2000

Chapter 8 - Data-Link Protocols (Encapsulation) 60

Modem or

DSU/CSU

X.25

Switch / DCE

Router / DTE

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.

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Avocent Access Router Cyclades-PR2000 Manuale Utente Pagina 60