flexfax: Comm failure during phase B/C

[evan@telly.org (Evan Leibovitch)]

I recently wrote:

> The system is a Linux (2.0.29, Caldera distribution) in which
> receiving faxes work perfectly. Sending always results in the same
> error: "Communications failure during Phase B/C".
> 
> If I try to send to another system with (a well-working) HylaFAX,
> it (the receiver) sends a "facsimile not received" notice that
> 
> "An attempt to receive facsimile on ttyXX failed because: COMREC received DCN"
 
I have since been able to pin the problem down a little better. The
sending works fine on COM2 (/dev/cua1 on Linux). I experienced my
problems above with 'intelligent' serial ports (in this case, Computone).

It appears to work OK when using the Computone non-modem-control port
(/dev/cuf0) but gives the above problem when using the 'modem-control' port
(/dev/ttyF0).

Can someone give an ide of what goes on at the stage that error message
occurs on the sending system? Is there any danger running HylaFAX/faxgetty
on 'non-modem-control' ports?

Thanks.
- Evan