Hello i test the fax with mISDN, no dedicated line.
I can send without problem, but i did'nt get the incoming fax working. (i tried with all options).
Seems you can't do it with autodetection and mISDN (i read asterisk forums and asterik france forums.)
Yes i tried it on my 0.9.2 of elastix. It's a good way to have a zap installation with hfc cards, but after some time i had some problems. (Don't know if it was because the versions of asterisk were not the same, don't even kown if it was install-zaphfc, when i reinstalled i need a stable box then i choose mISDN way, because it is natively support by elastix.)
I asked it on wanted feature, i hop e they will have some time to investigate that way.