Lantronix Device Server MSS 485 Installation Manual - 5.1.1 Socket Connections

Host-Initiated Connections

Using the MSS

5 - 2

5.1 Host-Initiated Connections

5.1.1 Socket Connections

Each node on a network has a node address, and each node address can 

allow connections on one or more sockets. Sometimes these sockets are 

referred to as ports. TCP/IP and IPX connections can be made directly to 

the MSS serial port using sockets. 

There are two categories of sockets. Well-known sockets are those that 

have been defined in RFCs (Requests for Comments); for example, port 

23 is used for Telnet connections. There are also custom sockets that users 

and developers define for their specific needs. 

NOTE:

If the serial port is in use, the socket connection will be refused.

5.1.1.1 TCP/IP Socket Connections

The MSS supports TCP/IP socket connections to ports 2001 and 3001. 

Opening a TCP session to port 3001 will form a raw TCP/IP connection 

to the serial port. Port 2001 can be used when Telnet IAC interpretation is 

needed. 

To specify a connection to a socket, use the Telnet command followed by 

the MSS IP address (or resolvable name) and the desired socket number.

Figure 5-1:  

TCP/IP Socket Connection

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

% TELNET mymss:2001

Local> SPX MSS_xxxxxx_S1