MultiTech MT5634ZBA USB v92 Driver is a firmware update (prerelease only) for the MultiTech MT5634ZBA-USB-V92 modem. Although this is not a final release, it fixes a number of problems related to -52 and -54 errors. This is not a widespread problem because these errors are experienced when communicating only to a handful of specific fax machines. We will update the site with the final firmware update when it becomes available.
CUSTOMER ADVISORY: This new firmware update was found unreliable when sending faxes to an Apple internal Class 2 modem. Because, in our estimation, most companies receiving faxes will not likely be receiving faxes on an Apple internal Class 2 modem, we leave the installation of this firmware update at the discretion of our customers. We are working withthe MultiTech Engineers to correct this problem.