You may have made a mistake with your model #2171 as Diamond's website only shows a #207x. This driver is for modem part # 23540010-002 and is V.2.200-01. Hope is works for you!
The following files are found inside the driver download file.
|SUPRAE~1.TXT||6.3 KB||14 May 2000|
|SUPRAE~1.EXE||241.1 KB||14 May 2000|