[asterisk-users] Asterisk+HylaFAX+SpanDSP+IAXmodem tutorial.

[Steve Underwood]

Michael J. Liberatore wrote:
> Alex, I thought asterisk 1.4 supports faxing internally now without the
> need for extra software?  Is your solution a different one?  I have no
> experience with faxing yet but plan to soon, that's why I ask and will
> read your blog entry.
>   
You need extra software, whether you use Asterisk 1.2 or 1.4, and its 
the same software in each case. You either add spandsp, and a couple of 
very simple interface apps -rxfax and txfax - directly into Asterisk, or 
you use spandsp/iaxmodem/hylafax+ over an IAX link. The former has 
issues, if you use G.729, as spandsp is GPL software. Using a program 
over an IAX limit gets around that.

It is possible to use hylafax or efax with iaxmodem, but most people use 
hylafax+

Steve