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9.Running Serial Protocols over Telnet using Virtual Ports
The Telnet driver can be used to run serial protocols over TCP. To connect the Telnet driver to a serial driver, use virtual comports. Virtual comports are software emulations of real comports, and are connected in pairs. These connected pairs are ports VC1 and VS1, VC2 and VS2, VC3 and VS3, VC4 and VS4, and VC5 and VS5. Anything written to the port VCx will be received at the port VSx, and vice versa. Note that autoconnect mode does not modify the data passing through in any way; it overrides any linefeed or tab options that might have been set.
Serial ports on two FieldServers may be connected over TCP in this way, using a Telnet client on one end and a Telnet server on the other. The client is configured to connect to the server using Telnet, and both client and server autoconnect to the desired serial ports on the respective FieldServers. The two serial ports are then transparently linked.
10.Limitations
The Telnet driver will only capture ports that have been specified in the configuration file used by the FieldServer. It will use the specified port parameters (baud rate, start/data/stop bits, parity), or FieldServer defaults where these have not been specified.
11.Revision History
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FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldserver.com Tel: (408)
