Digi TransPort WR31 User Manual page 611

Configure legacy protocols
RFC 1086 Mode:
RFC 1086 specifies a mode of operation in which the IP socket answers, and then, with a simple
protocol in the socket, identifies the X.25 address and other X.25 call setup parameters to use.
When the X.25 call parameters have been identified, the X.25 call is made. If successful, data is
switched between the X.25 call and the IP socket. The protocol selects whether incoming or
outgoing support is required.
IP length header
When IP length header is On, the IP length indicator field is inserted at the start of each packet.
When set to 8583 Ascii 4 byte, the IP length header conforms to the ISO 8583 format.
In the example above, 3 IP sockets will listen for an incoming connection on IP Port 2004. Once
connected, they each make an X.25 Call to jollyroger. The router recognizes that jollyroger is a
pre-defined macro, as illustrated below, and translates 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) are made over
whichever interface is specified by the Switch from XOT(TCP) to parameter on the
Configuration > Network > Protocol Switch page.
Note At the top of the page, the total number of sockets available and the number currently free
is shown. Take care to not allocate too many of the free sockets, unless you are confident
they are not required for other applications.
Digi TransPort WR Routers User Guide
Configure Protocol Switch software
611