Cyclades PR1000 - Manual (Page 60)

Chapter 8 - Data-Link Protocols (Encapsulation)
Cyclades-PR1000
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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.
X.25 Menu CONFIG=>INTERFACE=><LINK>=>ENCAPSULATION =>X.25
Parameter Description
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.