Use this item for modems or other serial devices that do not initialize correctly because their DSR is not initially set. It is also useful if the modem connection does not have a DSR line.

This registry item forces the computer to ignore the DSR setting of the attached modem or serial device. Thus, you can get around the requirement of setting a modem's DSR high.

The default is to ignore the DSR. To respect the DSR, add the registry item as a DWORD and set it to a value of zero.

Disclaimer: Modifying the registry can cause serious problems that may require you to reinstall your operating system. We cannot guarantee that problems resulting from modifications to the registry can be solved. Use the information provided at your own risk.