[Asterisk-Dev] T.38 source code

[Craig Southeren]

On Fri, 02 Sep 2005 09:23:35 +0200
Florian Overkamp <florian at obsimref.com> wrote:

> Hi,
> 
> Steve Underwood wrote:
> >> Has anyone tried the T.38 source code at 
> >> http://www.ionidea.ua/oss/asterisk/
> 
> > I haven't tried this code, and I don't know if it works. However, be 
> > aware that it is trying to do something that is of little value to most 
> > Asterisk users. Most people want either passthrough for use with ATAs or 
> > a PSTN gateway. This offers neither.
> 
> In your observation, what _does_ it offer then ?

A quick look at the package shows that it looks very much like what it
purports to be - a T.38 package for Asterisk.

These guys have done exactly what I was looking at doing, which is using
spandsp as engine to encode/decode the T.30 data stream needed for T.38.

Note that T.38 does not actually requre any DSP work - it is a matter of
wrapping the T.30 commands into a small amount of ASN and pushing them
over a UDP link.

For a more detailed explanation of what T.38 is and how it relates to
T.30, see my blog at http://www.voxgratia.net/blog/archives/2005/08/fax_facts.html

   Craig


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