Tried other drivers on this site and they all failed!!! Need one super stable for XP !!

Support Information:
Device Type: Modem / ISDN
Manufacturer: PC Tel
Model: D-1156IV/P2A
Interface: PCI / ISA
Operating System: Windows XP Professional
Age of Device: Not specified
FCCID:

Find it on DriverGuide (http://members.driverguide.com/index.php?action=srch&sm=b&aax=&qa6=801&qa5=10&qa7=1500&dp=3&qm0=D-1156IV%2FP2A&jmd=and&fzz=d) | Find it with Google (http://www.google.com/search?hl=en&lr=&ie=UTF-8&oe=UTF-8&q=PC+Tel+Modem+%2F+ISDN++D-1156IV%2FP2A+Windows+XP+Professional+) | Research manufacturer PC Tel (http://members.driverguide.com/index.php?action=getinfo&companyid=801)

Made by GVC, it only has PcTel chipset(s) eg: PCt789T. (El-cheapo soft modem)
No GVC support sites remain.

http://tekgems.com/images/large/MDM-D-1156IVP2A-unit.jpg

You can buy the modem, cable, and driver disk on ebay.com for 8.99 plus 6.00 shipping.

http://cgi.ebay.com/GVC-56000-56k-PCI-V-92-Fax-Data-Modem-D-1156IV-P2A-NEW_W0QQitemZ130022909544QQcmdZViewItem

The closest to XP I found was drivers for Windows 2000 and Windows NT4.0... here:

http://www.opendrivers.com/categorycompany/1365/1179/modem-asound-free-driver-download.html