I’ve been having problems segfaulting when receiving faxes. So I tried FFA. I used the register utility and my license is in /var/lib/asterisk :
ls /var/lib/asterisk/licenses/ -l total 4
-rw-r–r–. 1 root root 325 Jun 5 22:41 FFA-DNCXXXXXXX.lic

but:

Executing [17772822954@FaxIncoming:4]
ReceiveFAX(“SIP/ec2faxcall18-00000002”,
“/var/spool/asterisk/fax/20150605_2352.tif,df”) in new stack
— Channel ‘SIP/ec2faxcall18-00000002’ receiving FAX
‘/var/spool/asterisk/fax/20150605_2352.tif’
[Jun 5 23:52:39] WARNING[12361][C-00000002]: res_fax_digium.c:1604
dgm_fax_reserve: Cannot reserve FAX session – session limit exceeded
(max: 0).
[Jun 5 23:52:39] ERROR[12361][C-00000002]: res_fax.c:1906
receivefax_exec: Unable to reserve FAX session.

and

fax show licenses Fax Licensing Information
=============================Free fax licenses: 0
Total licensed ports: 0

??

sean