Model: SM56 PCI Data\Fax\Voice
Operating System: Windows XP (Note: might work with other versions of this os.)
Before downloading: Run Free Scan for Instant Driver Updates
I have tried and tested all versions of the Motorola SM56 PCI Modem drivers compatible with Windows XP and released by Motorola, and this one gave me the best speed <50kb/sec.> and performance!
For installation instructions ReadMe file included!