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Serial Port Profiles

162 

IOLAN SDS/SCS/STS/MDC User’s Guide, Version 4.0

The Serial Tunneling profile allows two IOLANs to be connected back-to-back over the network to 
establish a virtual link between two serial ports based on RFC 2217.

The serial device that initiates the connection is the 

 

and the destination is the 

, although once the serial communication tunnel has been successfully established, 

communication can go both ways.

A more detailed implementation of the Serial Tunneling profile is as follows:

Network

 

 

The 

 will also support Telnet Com Port Control protocol as detailed in RFC 2217.

Network

 

The IOLAN serial port signals will also follow the signals on the other serial port. If one serial port 
receives DSR then it will raise DTR on the other serial port. If one serial port receives CTS then it 
will raise RTS on the other serial port. The CD signal is ignored.