This setting only takes effect the next time windows is started.

Only one program on a PC can be bound to a particular port at one time, and thus if the port is in use by another application the Redirector will be unable to bind. Thus the Redirector will be unable to receive data.

It will take you to the purchase portal, which will allow you to purchase a licence for this particular computer.

This field is reset to zero whenever you change the serial port setting, or press the adjacent reset button.

This field is reset to zero whenever you change the serial port setting, or press the adjacent reset button.

Check this box to prevent the application accidentally being closed.

If an application is connected to the Redirector, you will be asked if you really mean to exit. The reason for this is that if you terminate the Redirector, a virtual serial port to which you application is connected will get "stuck". If you restart the Redirector, it will attempt to reconnect to the "stuck" port.

This button can be disabled using the Disable Exit Button Checkbox.

This field is reset to zero whenever you change the UDP port settings, or press the adjacent UDP Statistics Reset Button .

Packets will only be received, and thus counted if you have ticked the Bind to UDP Port Checkbox

This field is reset to zero whenever you change the UDP port settings, or press the adjacent UDP Statistics Reset Button.

If the button is captioned "Open", when pressed the Redirector will create the serial port you have selected or defined in the Serial Port Selection Entry field. Prior to pressing the button you can change the serial port setting.

if the button is entitled "Configure" then the port is currently created, and you may not change the setting. Press the button to enable configuration of the port.

You may either select a port from the list provided, or you may enter a port name directly.

The port list provided is edited to remove ports that are already present in your system. You can override this by creating another (eg) COM1, but this is not recommended, and may lead to system instability.

Serial ports do not have to begin COM, they can have any name. However, many applications that operate with serial ports only provide for a subset of fixed names, sometimes as limited as COM1 through COM4. Under these circumstances, you have to configure a port in the Redirector that matches a port that is both available, and can be selected from your target application.

If there is no application connected to the port, it will be captioned as "Closed".

Once an application connects, the field will reflect the settings of the port as set by your connecting application. The field will then display something like "Open 4800,N,8,1" reflecting the state of the port.

The string displayed is built up as the connecting application calls for settings of the serial port, so there may be either an incomplete string, or just the word "Open" if the connecting application hasn't got around to setting the port parameters yet. The setting of the serial parameters normally happens so quickly that the field changes from "Closed" to "Open 2400,N,8,1" apparently instantly.

See Also: Why does the Redirector not have flow control

Note: You can choose the Redirector to start automatically each time Windows starts, see AutoStartBehavior

If the UDP Transmit Mode Selection is set for "No Transmissions" then this setting does not appear.

The appropriate setting of this variable is the most critical tuning setting for the Redirector. Generally, the higher the baud rate of the connecting application, and the greater volume of data that needs to be sent, and the faster the application response time needs to be, then the shorter should be the inter packet interval.

If the transmit frequency is too great, then many short packets of data will be sent, which is generally considered wasteful of network bandwidth. If the transmit frequency is too low, then a small number of large packets will be sent. This is good from the network's perspective, but may introduce unacceptable delays into the communication process.

A number of statistics are provided to help you optimize your setting, see Maximum Block Size and Average Packet Size statistics.

A single UDP packet can hold 1492 bytes of data. If in a single transmit slot the Redirector has more than 1492 bytes of data to send, then an "Oversize" indicator will appear. This does not mean that either an oversize packet has been sent (which would be illegal from the network's perspective) or that data has been lost; merely it indicates that two or more packets have been sent in this time interval. Whether this is acceptable or not depends on the receiving application. If there is something special about a packet, then it may matter. if the data is just transmitted as a stream, then there is probably not going to be any negative impacts.

This counter is reset whenever the network communications parameters are changed, or when the UDP Statistics Reset Button is pressed.

This counter is reset whenever the network communications parameters are changed, or when the UDP Statistics Reset Button is pressed.

If the button is captioned "Open", when pressed the Redirector will open a network port according to the setting configured. Prior to pressing the button you can change the UDP port setting, which are held within the frame entitled "Transmitted data". Note many fields in this frame appear and disappear according to the UDP Transmit Mode Selection.

if the button is entitled "Configure" then the UDP port is currently open, and you may not change the setting. Press the button to enable configuration of the port.

See also: Timer Interval Selection

Whilst the Redirector is running, this field is not editable, to make it editable use the adjacent "Configure" button.

Choice of port should be made carefully. Many of the UDP ports have pre-assigned functions, particularly those below 1024.

There are five distinct transmission modes.