Re: [hylafax-users] Slow fax output!

[Giulio Orsero <giulioo@xxxxxxxxx>]

On 9/7/05, Rob Blomquist <rob@xxxxxxxxxxxxxxx> wrote:
> Awhile ago, I posted a note about wanting to start faxmodem, and I sent out an
> email showing this:
> 
> > /usr/sbin/faxmodem -c '(0,1),(0-5),(0-2),(0-2),0,0,0,(0-7)' ttyS1
> Giulio Orsero replied back to me:
> > df=0,1,3
> > ec=1
> > vr=0-64
> > so, for a class1 you could use
> > faxmodem -c '(0-64),(0-5),(0-4),(0-2),(0,1,3),(1),(0),(0-7)' ttyS0
> 
> Will this string significantly speed things up? My string is a Class 2 string.

df=0,1,3 will help with speed, since it enables compression
ec=1 will help reliability
vr=0-64 will enable higher resolutions (for sending you need to use -G
command line switch)

HylaFAX right now supports the following compressions (from worst to best)
1D-MH
2D-MR
2D-MMR
Your log show that you're using the lowest possible compression
(1D-MH), while your remote party would support 2D-MR.

It's very rare a normal modem will support 2D-MR/2D-MMR in class2 (in
class2 the limit is the modem capabilties, while in class1 the limit
is the software capabilities)

Try using minicom, and
atz
OK
at+fclass=2           (or at+fclass=2.0)
OK
at+fdcc=?
(0,1),(0-5),(0-2),(0-2),0,0,0,(0-7)

If the 5th is 0 then it means your modem will only do 1D-MH in class2,
so you'd better reconfigure it in class1 to use best compression.

-- 
giulioo@xxxxxxxxx

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