[Asterisk-Users] Softfax/spandsp

[Steve Underwood]

Hi all,

It seems this week's release of spandsp fixed the major problems in the 
previous release, but still people have had a lot of trouble. Working 
with some of those who tried the software and gave me good feedback, I 
have identified some apparently common bugs in fax machines, and I have 
implemented workarounds for these in spandsp, and feedback so far seems 
good. I also fixed a couple of bugs. I think this version will work 
proper with a much wider range of fax machines. However, people have 
warning me that fax machines have a bad habit of not following the specs 
properly :-(

There is now a new tarball at 
ftp://ftp.opencall.org/pub/spandsp/spandsp-0.0.1b.tar.gz   Please try 
this, and report any problems you find. This version has the following 
changes:

    A floating point exception has been fixed
    A problem with the software not properly
    Some fax machines send a little less than the specified 1.5 seconds 
of training test data, so the training test failed every time. I now 
only look for 1.25seconds of training test data.
    Some fax machines do not correctly initialise the scrambler in their 
V.29 transmit modem. I have changed the software to tolerate this.
    Some fax machines send a burst of ones before the burst of zeros 
that forms the training test data. I have changed the software to 
tolerate this.

Regards,
Steve