Serial Port Profiles

Serial Tunneling Profile

Overview

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.

Functionality

The serial device that initiates the connection is the Tunnel Client and the destination is the Tunnel Server, 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:

Serial

Server Tunnel

perle

IOLAN

Network

Serial

perle

Client

IOLAN Tunnel

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

Serial

Server Tunnel

perle

IOLAN

Network

Running

2217 Application

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.

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

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Perle Systems 5500161-40 manual Serial Tunneling Profile, Serial Server Tunnel, Client Iolan Tunnel, Running Application