These instructions were provided by one of our customer.
1) follow the <a href=“http://www.didforsale.com/blog/?p=47″>same instructions</a> to setup a *SIP* trunk (not an IAX trunk)
2) in freepbx, create an IAX extension. Make sure to
- enter a secret. This secret will be used later on so make sure to enter it.
- disable dictation service
- set “Record Incoming / Outgoing” to “Never”
3) Create an inbound route that forwards to the newly created IAX extension above
4) create a new virtual fax with the same extension and secret as in step 2)
5) restart asterisk and you’re done
Hope this will help you using our DIDs for FAX.

Thanks for that awesome posting. It saved MUCH time