flexfax: ZyXEL 1496 won't answer

["Alan Sparks" <asparks@nss.harris.com>]

Running HylaFAX 4pl1 on SunOS 4.1.4...

I've a ZyXEL 1496 set up here, good luck sending fax.  Have a faxgetty
running OK on /dev/cua0 which shows "running and idle," with inbound service
enabled.  So far, so good.

But it will not answer an incoming call.  (using the stock config file).
RingsBeforeAnswer is set to 1.  When I call the modem, faxstat shows
"Listening to rings from modem", and I see a LCK..cua0 file created (in my
/var/spool/locks dir).  Lock file disappears when call is discontinued, and
faxstat returns to "running and idle."

Any ideas why this won't pick up?  Any thoughts are appreciated.
-Alan

=============
Alan Sparks, IS Engineering Support
<asparks@nss.harris.com>
Harris Network Support Systems, Camarillo CA     (805) 389-2430