You've reached the home for one of the best modem diagnostics available.  Although it's a broadband world, in reality most people still get to the internet via modem. It's also the quickest and cheapest way for many as well.

About Modem Doctor

Since 1987, Modem Doctor has been the premier modem/uart system utility  for MS-DOS, Windows, and Windows 95. Modem Doctor helps you find and correct many common configuration and installation errors. Using a simple menu-driven interface, even a novice can troubleshoot and repair over 60 different installation or setup problems with modems and uarts.

Since each operating system places different demands on  modems,  each version of Modem Doctor is designed to work in  conjunction with its environment. The DOS version interrogates serial ports, interrupt controllers, and uarts at the system board level while the Win31 and Win95 versions are designed to check Windows settings and proper communication between your modem/serial ports and the system comm driver.

View our software with the Downloads button. Check out on-line reviews and other features by clicking on the navigation buttons at the left edge of the screen