Digi TransPort User Manual page 365

Digi TransPort Protocol Switch parameters
This parameter controls the switching of incoming X.25 calls received via TCP or XOT. Select
the interface to which data should be switched from the drop down list, or select "Off" and the
protocol switch will not respond to any incoming XOT or TCP connections.
LAPD
This parameter controls the switching of incoming X.25 calls received via ISDN LAPD. Select
the interface to which data should be switched from the drop down list, or select "Off" and the
protocol switch will not respond to any incoming LAPD calls.
LAPB X
This parameter controls the switching of incoming X.25 calls received via LAPB X. Select the
interface to which data should be switched from the drop down list, or select "Off" and the
protocol switch will not respond to any incoming LAPB X calls.
LAPB X PVC
This parameter controls the switching of incoming X.25 calls received via an LAPB X PVC. Select
the interface to which data should be switched from the drop down list, or select "Off" and the
protocol switch will not respond to any incoming PVC calls on LAPB X.
XOT PVC
This parameter controls the switching of incoming X.25 calls received via an XOT PVC. Select
the interface to which data should be switched from the drop down list, or select "Off" and the
protocol switch will not respond to any incoming XOT PVC calls.
TCP XOT backup to interface
If any of the Switch from parameters has been set to XOT, and XOT is unavailable, this
parameter may be used to specify an alternative interface to switch the X.25 call to. Any of the
other interfaces may be chosen, or "None". If "None" is chosen, then no backup call will be
attempted.
LAPD backup to interface
If any of the Switch from parameters has been set to LAPD, and LAPD is unavailable, this
parameter may be used to specify an alternative interface to switch the X.25 call to. Any of the
other interfaces may be chosen, or "None". If "None" is chosen, then no backup call will be
attempted.
LAPB X backup to interface
If any of the Switch from parameters has been set to LAPB X, and LAPB X is unavailable, this
parameter may be used to specify an alternative interface to switch the X.25 call to. Any of the
other interfaces may be chosen, or "None". If "None" is chosen, then no backup call will be
attempted.
VXN backup to interface
If any of the Switch from parameters has been set to VXN, and VXN is unavailable, this
parameter may be used to specify an alternative interface to switch the X.25 call to. Any of the
other interfaces may be chosen, or "None". If "None" is chosen, then no backup call will be
attempted.
LAPD Parameters
Calling Prefix
This parameter specifies the call prefix to inserted in front of the NUA in calls being switched
to LAPD. For example, if the called NUA in the call being received by the LAPB 0 interface is
Digi TransPort User Guide 365