I receive fhng:52 or fhng:54 errors when I try to send a fax.

This is an error that indicates that one or more pages were not sent or not completely sent. A 10ms timer was added to the end of the transmit page to wait for the RTC signal to be transmitted.

This was added in firmware vs 1.14e / 3.14e. The x.14e firmware can be downloaded from our Web site at:

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