Configure legacy protocols Configure Protocol Switch software
Digi TransPort WR Routers User Guide 613
NUA to Interface Mappings
This page contains a table to enter a series of X.25 NUA or NUI values along with IP addresses/Ports
to which they should be mapped, if you need to override the default settings in the Configuration >
Network > Legacy Protocols > X.25 > NUA/NUI Interface Mappings page.
If, in the Protocol Switch configuration, you had configured the router to switch from LABP 0 to
TCP, the IP Address and Port values would normally be determined from the XOT Remote IP
address and IP stream port parameters. However, having set up the NUA/NUI to IP addresses table
as shown in the example above, if an X.25 call with NUA of value 222 is received on LAPB 0, it is
switched onto a TCP socket using IP address 1.2.3.4 on port 45 instead of the settings configured on
the Configuration > Network > Legacy Protocols > X.25 > NUA/NUI Interface Mappings page.
Similarly, NUIs can also be matched. In this example, a call with NUI of value test is switched onto a
TCP socket using IP address 100.100.100.1 on port 678.
All three comparison fields, NUA, NUI and Call Data can use the wildcard matching characters ? and
*. In the example shown above, when an X.25 call is received with either the NUA having 1234
followed by any 2 digits or a call being received with call user data with any 4 characters followed by
aa, the call is switched to a TCP socket on address 100.100.100.52 on port 4001.
When a connection has been successfully established and data is being switched from the X.25 call
to the socket and from the socket to the X.25 connection, it can be terminated by either the socket
closing or the X.25 call clearing.
If the connection terminates because of an incoming X25 CALL CLEAR packet, the switch terminates
the socket connection. If the connection terminates because the socket is closed, the switch clears
the X.25 call by transmitting a CALL CLEAR packet.
To Next Page
Loading...
