Lantronix MSS1-T, Reference Manual

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Host-Initiated Connections Using the MSS
5 - 2
5.1.1.2 IPX/SPX Socket Connections
The MSS supports SPX socket connections to port 9001. To make a socket connection, use the SPX
command followed by the SAP name of the MSS.
Figure 5-2: SPX Socket Connection
5.1.2 LAT Connections
Most VMS applications require the creation of a LAT application port to access the MSS serial
port. Programs can use the LAT application port as they would use a physical port for input and
output. For example, an application might be configured to use port LTA3419 which would allow
it to access a device connected to the MSS serial port.
To configure LAT on your VMS host, create a new and unique application port using the host’s
LATCP program (in Figure 5-3, LTAnnnn represents any unused LAT port number). Map the
application port to the MSS by specifying the MSS node name and the serial port name. Enter the
following commands at the VMS prompt:
Figure 5-3: Creating a LAT Application Port
NOTE: The procedure is similar for DEC UNIX LAT.
If heavy input or output loads are expected on the LTA port, you can set alternate type ahead to
reduce flow control on the ports.
Figure 5-4: Reducing Flow Control
To connect to the MSS serial port from a VMS host, use the command below and include the
appropriate LAT application port number:
Figure 5-5: Connecting to the MSS
Local> SPX MSS_xxxxxx_S1
$ RUN SYS$SYSTEM:LATCP
LCP> CREATE PORT LTA nnnn/APPLICATION
LCP> SET PORT LTA nnnn/node=mssname/port=port_1
LCP> SHOW PORT LTA nnnn
LCP> EXIT
$ SET TERM/PERM/ALTYPEAHD LTA nnnn
$ SET HOST/DTE lta nnnn