flexfax: Problem using faxaddmodem

[Derek Balling <dballing@speedchoice.com>]

I'm trying to install a USR Sportster (33.6, not an X2 model) as our
first faxmodem, under Linux. I'm running Red Hat 4.2 with a 16450 UART
(yeah, I know, the modem I have is overkill for the port speed... it's
faxes... who cares? *grin*)

I've reset the modem to factory defaults with an AT&F/AT&W, and ran
faxaddmodem.

When it gets to the "probing modem" part, it can't seem to lock onto the
modem's port speed, stepping down through until it gets to 1200 baud,
and then reporting :

Unable to deduce DTE-DCE speed; check that you are using the
correct device and/or that your modem is setup properly.  If
all else fails, try the -s option to lock the speed.  

OK, so I do that, considering its a 16450, I do:

# faxaddmodem -s 19200 cua1

Which tells me that there is a problem with the modem. Now, if I use

# cu -l cua1 -19200

I can talk to the modem fine with no problems.

Any suggestions?