cannot find pci modem driver for toshiba tecra t1 system unit

Support Information:
Device Type: Modem / ISDN
Manufacturer: Toshiba
Model: tecra s1 system unit
Interface: PCI / ISA
Operating System: Windows XP Professional
Age of Device: < 2 years old
FCCID:

Find it on DriverGuide (http://members.driverguide.com/index.php?action=srch&sm=b&aax=&qa6=1066&qa5=10&qa7=1500&dp=2&qm0=tecra+s1+system+unit&jmd=and&fzz=d) | Find it with Google (http://www.google.com/search?hl=en&lr=&ie=UTF-8&oe=UTF-8&q=Toshiba+Modem+%2F+ISDN++tecra+s1+system+unit+Win dows+XP+Professional+) | Research manufacturer Toshiba (http://members.driverguide.com/index.php?action=getinfo&companyid=1066)

Win XP driver for Toshiba Software V.92 Modem
Version: SM2138ALD04
File name:
SA50BXMD.EXE (http://209.167.114.38/support/Download/files_downloads/PSA50C/SA50BXMD.exe)<---click here to download directly from Toshiba storage site
File date: 06/03/05