Configuring legacy protocols Configure X.25 parameters
Digi TransPort® Routers User Guide
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Configure an X.25 Permanent Virtual Circuit (PVC)
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.
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1. Go to .Configuration > Network >Legacy Protocol > X.25 > X.25 PVCs > X.25 PVCn.
2. Configure X.25 PVCparameters:
Enable this PVC
Enables or disables the PVC.
LCN
The LCN value use for this PVC. For an XOT PVC, this parameter defines the ResponderLCN
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