Using the Redirector :: The Serial/IP Control Panel

Port Setting: DSR/DCD/CTS Emulation

The Serial/IP Redirector can emulate the behavior of the DSR, DCD, and CTS signals. This feature is primarily used when an application depends on changes in one or more of these signals and the server does not support the COM Port Control protocol, preventing relay of these signals from the server.

To set DSR/DCD/CTS Emulation

In the Serial/IP Control Panel:

Select a virtual COM port.
Select a check box for an emulation setting to enable it.
In the drop-down list, select an emulation method.
The setting becomes effective without further action.

The new setting will be used the next time this virtual COM port is opened.

Settings

Disabled (default)

The redirector does not emulate the signals.

If the server supports the COM Port Control protocol, the signal will track the real-time condition of the signal as reported by the server.

If the server does not support the COM Port Control protocol, the signal is always indicated "low".

Enabled + Always High

Forces the signal to always indicate "high".

Enabled + Always Low

Forces the signal to always indicate "low".

Enabled + Track Connection

Causes the signal to indicate "high" when there is a network connection to the server and "low" otherwise.

Tips

Reasons to use DSR/DCD/CTS Emulation:

If the application needs to see a different pattern of signals than those relayed by the redirector from the server.
To compensate for lack of COM Port Control protocol support in the server.
To enforce certain signal behavior when two copies of Serial/IP are being used back-to-back.

Notes

If the Configuration Wizard detects server support for the COM Port Control protocol, it recommends disabled settings for the signal emulations.

If any signal emulation is enabled, it overrides the effects of the COM Port Control protocol.