asterisk users - May 2015 - Asterisk 11 on Raspbian2. ReceiveFAX/SendFAX fails

Hi,

On a new Raspberry2 with Asterisk 11.13.1 binary-installed, ReceiveFAX
exits with FAILED status.

Each attempt is made with something like:
channel originate Local/12345 at faxgateway application SendFAX myfile.tif

I'm not sure if failure "mostly" comes from SendFAX or from
ReceiveFAX but
it fails  with 100% rate.

uname -a output is:
Linux myhost 3.18.7-v7+ #755 SMP PREEMPT Thu Feb 12 17:20:48 GMT 2015
armv7l GNU/Linux

after increasing verbosity to 10, I saw this in my log files:
[May 27 23:18:46] DEBUG[4133][C-00000020] res_fax_spandsp.c: FAX session
'5' entering phase E
[May 27 23:18:46] DEBUG[4133][C-00000020] res_fax_spandsp.c: FAX session
'5' completed with result: FAILED (Unexpected message received)


My questions are:
1. Do you have successfully used ReceiveFAX app on a
Pi2/Raspbian/Jessie/Asterisk 11 setup ?
2. How can I debug this ?

Regards
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