Westermo MR Series - Manual (Page 304)

304 6622-3201
Web Interface and Command Line Reference Guide www.westermo.com
IP length header
When IP length header is “On”, the IP length indicator field is inserted at the start of each pack-
et. When set to “8583 Ascii 4 byte”, the IP length header will conform to the ISO 8583 format.
Note:
At the bottom of the page the total number of sockets available and the number currently free
is shown. Care should be take not to allocate too many of the free sockets unless you are con-
fident that they are not required for other applications.
In the example above, 3 IP sockets will “listen” for an incoming connection on IP Port 2004. Once
con nected they will each will make an X.25 Call to “jollyroger”. The unit will recognise that “jol-
lyroger” is a pre-defined macro (as illustrated below), and will translate it into an X.25 Call to
address 32423 with the string “x25 data” included as data in the call. The outgoing X.25 call(s) will
be made over whichever interface is specified by the Switch from XOT(TCP) to parameter on the
Configure > Protocol Switch page.
At the remote site, an X.25 PAD could be configured to answer the incoming call by setting its
answer ing NUA to “32423”. This would provide a means for a PAD to connect onto an incoming
TCP socket. However, it would normally be an X.25 Switch that would receive the call and so it
would need to be configured to direct IP calls to the appropriate interface.