User`s guide

306
Entity
Instance
Parameter
Values
Equivalent Web Parameter
ipx25 n iphdr
0=Off
1=On
2=8583 Ascii 4 byte
IP length header
NUA to Interface Mappings
Configuration - Network > Protocol Switch > NUA to Interface Mappings
This page contains a table that allows you 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.
So, if in the Protocol Switch configuration you had configured the unit 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 will be switched onto a TCP socket using IP address “1.2.3.4” on port
45 instead of those settings configured on the Configuration - Network > Legacy Protocols >
X.25 > NUA/NUI Interface Mappings page.
Similarly, NUIs can also be matched and in this example a call with NUI of value “test” will
be switched onto a TCP socket using IP address “100.100.100.1” on port 678.
All 3 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” then 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 then the switch
will terminate the socket connection. If the connection terminates because the socket is
closed then the switch will clear the X.25 call by transmitting a CALL CLEAR packet.
Related CLI Commands
Entity
Instance
Parameter
Values
Equivalent Web Parameter
nuaip 0-255 nua 0-65536 NUA
nuaip 0-255 ipaddr IP address IP Address
nuaip 0-255 ip_port 0-65536 IP Port
nuaip 0-255 swto
0-10, 12-15
Interface