Digi TransPort, Руководство пользователя

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Configure TPAD parameters
Digi TransPort User Guide 512
X.25 settings parameters
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
Whether the X.25 LCN used 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
The LCN parameter is used to set the first LCN for the backup interface.
Use NUI
The X.25 Network User Identifier to be used for outgoing X.25 calls if no NUI is specified in the
call string for the backup interface.
LCN
The first LCN for the backup interface.
LCN direction
Determines whether the LCN used for the backup X.25 interface is incremented or
decremented from the starting value when multiple X.25 instances share a single layer 2
connection.