The modem installs properly in Windows, but when I reboot my computer the modem is not present or detected.

MT5634ZBA-USB-V.92:

Firmware version 2.27L or greater fixes this problem. The firmware can be downloaded from our Web site at:

http://www.multitech.com/en_US/SUPPORT/Families/MultiModemZBA/firmware


MT5634ZBA-USB:

Firmware version 8.27L or greater fixes this problem. The firmware can be downloaded from our Web site at:

http://www.multitech.com/en_US/SUPPORT/Families/MultiModemZBA/firmware