please help cant find it

Support Information:
Device Type: Modem / ISDN
Manufacturer: Efficient Networks, Inc.
Model: speedstream 5100
Interface: Other
Operating System: Windows XP Home
Age of Device: < 2 years old
FCCID:

Find it on DriverGuide (http://members.driverguide.com/index.php?action=srch&sm=b&aax=&qa6=1293&qa5=10&qa7=1500&dp=2&qm0=speedstream+5100&jmd=and&fzz=d) | Find it with Google (http://www.google.com/search?hl=en&lr=&ie=UTF-8&oe=UTF-8&q=Efficient+Networks%2C+Inc.+Modem+%2F+ISDN++speed stream+5100+Windows+XP+Home+) | Research manufacturer Efficient Networks, Inc. (http://members.driverguide.com/index.php?action=getinfo&companyid=1293)

Please define your interface. Modems do not have "other" interfaces. Most dsl modems have usb or ethernet interfaces. We need to know how your modem connects to the pc.

I'm searching for the same thing.
Support Information:
Device Type: Modem / ISDN
Manufacturer: Efficient Networks, Inc.
Model: speedstream 5100
Interface: ethernet
Operating System: Windows XP Home
Age of Device: 3 years old
FCCID: 6EDDL01B2210

The Speedstream 5100 is a router. Routers don't require drivers.