Operating System: Windows 98 (Note: might work with other versions of this os.)
Before downloading: Run Free Scan for Instant Driver Updates
Cellular Enhancement Firmware Urgrade for the 3CXM556, 3CCM556, XJ5560, and CC5560.
file size 557 KB
file data 05-04-99
Firmware upgrade TC204 for both the XJ5560 and the 3CXM556 modems. Includes V.90.
file size 549 KB
file data 01-18-99
Before these were applied to my model Megahertz XJ5560 56k PC Card modem, Windows was using its "Generic PCMCIA Modem" driver. First I flashed the modem with both updaters, then updated the modem driver in the Windows Device Manager control panel. My connect speed has increased dramatically.
Support for this and other older Megahertz, US Robotics and 3Com PCMCIA modem has been discontinued. Drivers can be found at www.usr.com/support/drivers-template.asp?prod=s-pccard