Digi TransPort WR11, User Manual

Page: 579 / 866

Configure legacy protocols Configure X.25 parameters
Digi TransPort WR Routers User Guide 579
Configure X.25 PVCs parameters
A Permanent Virtual Circuit (PVC) provides the X.25 equivalent of a leased line service. With a PVC
there is no call setup or disconnect process; you can just start sending and receiving X.25 data on a
specified LCN. For each X.25 service connection you may setup up multiple PVCs each of which uses
a different LCN (or a mixture of PVCs and SVCs). Digi routers support up to four PVCs numbered 0-3 .
Enable this PVC
Enables or disables the PVC.
LCN
The LCN value use for this PVC. For an XOT PVC, this parameter defines the Responder LCN field
in the PVC setup packet, though the XOT PVC connection always uses an LCN of 1 . For an XOT
PVC, this field should contain the remote connection’s LCN.
PVC Mode
The lower layer interface use for the PVC. This setting can be set to LAPB , LAPD or TCP , for XOT
mode.
Connect this PVC to PAD x
What type of upper layer interface is connected to this PVC and can be set to PAD for an X.25
PAD, TPAD for a TPAD instance, or XSW for X.25 switching. If set to XSW for the X.25 switch, the
X.25 switch must also be configured regarding the interfaces to switch this PVC to/from. For
example, if this is an incoming XOT PVC we are configuring, the Switch from XOT PVC parameter
must be set to the desired destination interface.
Use packet size
The packet size for the PVC. Select the appropriate value from the drop down list.
Use window size
The layer 3 window size for the PVC. Select the appropriate value from the drop down list.