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W&T The Windows COM port redirector
Subject to error and alteration
15�3 Set up virtual COM ports
To set up a new virtual COM port, start the COM Port Redirec-
tor configuration applet in the control panel and click on the
Com-Server button. A dialog box opens which you fill in and
then click on OK. All settings can also be corrected later by
editing the corresponding entry in the port list. Once all your
entries have been made, click on OK. It is not normally neces-
sary to restart Windows in order to use the new COM port.
TCP-Port
The entry field TCP Port in the dialog box contains the TCP
port used for transporting the serial user data. To commu-
nicate with a Com-Server configured with the factory default
settings, you must use the pre-configured value 8000.
In addition to the indicated TCP port for user data transport,
the COM Port Redirector uses an additional TCP connection
for exchanging configuration and status information. The
port number used for this is always calculated from the for-
mula data port + 1094 (e.g. 8000 + 1094 = 9094). If – for
example when a firewall is present – you need to deviate from
the prescribed TCP port, the TCP ports entered in the COM
Port Redirector must also be set correspondingly in the Com-
Server:
15�3�1 Optional settings on the Com-Server
By default the Com-Server is in TCP Server mode, so that for
use with the COM Port Redirector you must first configure
only the network-specific basic parameters IP address, subnet
mask and gateway address. It is not necessary to set serial
transmission parameters (e.g. baud rate), since these are de-
termined by the serial application and automatically set in the
Com-Server by the COM Port Redirector.
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