[asterisk-users] 1.8.4-rc2: ReceiveFAX fails

[sean darcy]

On a test fax:

     -- Executing [s at incoming-fax:1] Set("DAHDI/4-1", 
"FAXFILE=/var/spool/asterisk/fax/20110415_1825") in new stack
     -- Executing [s at incoming-fax:2] Answer("DAHDI/4-1", "") in new stack
     -- Executing [s at incoming-fax:3] ReceiveFAX("DAHDI/4-1", 
"/var/spool/asterisk/fax/20110415_1825.tif") in new stack
     -- Channel 'DAHDI/4-1' receiving FAX 
'/var/spool/asterisk/fax/20110415_1825.tif'
     -- Channel 4 detected a CED tone towards the network.
[Apr 15 18:25:52] WARNING[5600]: res_fax_spandsp.c:367 spandsp_log: 
WARNING T.30 ECM carrier not found
[Apr 15 18:25:52] WARNING[5600]: res_fax_spandsp.c:367 spandsp_log: 
WARNING T.30 ECM carrier not found
   == Spawn extension (incoming-fax, s, 3) exited non-zero on 'DAHDI/4-1'


/var/spool/asterisk/fax exists, but no file 20110415_1825.tif is created.

Using spandsp-0.0.6-pre18, the Jan 22 release.

Do the log notes of the CED tone or the T.30 ECM warning have anything 
to do with this?

chan_dahdi.conf:

[pstn]
context=incoming-pstn-line ; Incoming calls go to [incoming-pstn-line]
  in extensions.conf
faxdetect=incoming
faxbuffers=>6,full  ; who knows what this does
busydetect=yes
dahdichan => 4

Any idea on how to debug this?

sean