Digi TransPort WR11, User Manual

Page: 539 / 866

Configure legacy protocols Configure TPAD parameters
Digi TransPort WR Routers User Guide 539
X.25 settings parameters
When making an outgoing X.25 call
Default X.25 Packet Size
The default X.25 packet size for TPAD transactions.
Use NUA
The X.25 Network User Address for outgoing X.25 calls if no NUA is specified in the call string.
Use NUI
The X.25 Network User Identifier for outgoing X.25 calls if no NUI is specified in the call string.
LCN
The router supports up to eight logical X.25/TPAD channels. In practice, the operational limit is
determined by the particular service to which you subscribe (usually 4). Each logical channel
must be assigned a valid Logical Channel Number (LCN). The LCN parameter is the value of the
first LCN that will be assigned for outgoing X.25 CALLs. The default is 1027 . For incoming calls,
the router accepts the LCN specified by the caller.
LCN direction
Specifies whether the X.25 LCN for outgoing TPAD calls is incremented or decremented from the
starting value when multiple TPAD instances share one layer 2 (LAPB or LAPD), connection. The
default is DOWN and LCNs are decremented, such as if the first CALL uses 1024 , the next will use
1023 , etc. Setting the parameter to UP causes the LCN to be incremented from the start value.
On the backup interface
Use NUA
Sets the first LCN for the backup interface.