Avocent Access Router Cyclades-PR1000 User Manual

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.

X.25 Menu  CONFIG=>INTERFACE=><LINK>=>ENCAPSULATION =>X.25

X.121 (Local DTE) Address Address assigned to this interface (provided by the public X.25 Network

Provider).  Can be up to 15 digits.

Switch Mode Active

Causes the Router to act as a switch.

Incoming Calls Received
Over the Other X.25 Links
With Unknown Destination
DTE Can be Forwarded
Through This Link

Applies when Switch Mode is 

Active.

Suppress Calling Address

Public X.25 Network:  This parameter must be chosen according to the
guidelines given by the Public X.25 Network provider.  When activated, the
sender's Local DTE address is not included in the Call Request Message.

Inactivity Timeout

Time until connection is automatically terminated by the router if there is no
traffic.

Configure as DTE or DCE

As mentioned above, the router can act either as the recipient of information
(

DTE), or as the passer-on of information (DCE).  Public X.25 Network:  Both

routers are DTEs.