Hello,

I've been trying hard to get inbound T.38 faxing to work with a SIP trunk 
provider in Canada.

I was using spandsp 0.0.3pre27, upgraded to the latest snapshot in the 
hopes that that would work.

I've attached full log w/udptl debug and rxfax(debug), please review and 
advise with suggestions or requests for further information.


Call flow (SIP)
---------------

PSTN -> Verso Clarent C5CM -> OpenPBX 1.2 RC3 (spandsp/rxfax)


sip.conf
--------

t38udptlsupport=yes
t38pt_udptl=yes
t38pt_rtp=yes
t38pt_tcp=yes

; also tried with canreinvite=yes
canreinvite=no


extensions.conf
---------------

exten => s,n,RxFAX(${FAXFILE}|debug)


full log (udptl debug, sip debug)
--------

Mar 25 21:21:29 DEBUG[2984328112] app_rxfax.c: Got hangup
Mar 25 21:21:29 DEBUG[2984328112] app_rxfax.c: 
==============================================================================
Mar 25 21:21:29 DEBUG[2984328112] app_rxfax.c: Fax receive not successful - 
result (42) Unexpected DCN while waiting for image data.
Mar 25 21:21:29 DEBUG[2984328112] app_rxfax.c: 
==============================================================================
Mar 25 21:21:29 DEBUG[2984328112] app_rxfax.c: FLOW T.30 Changing from state 2 
to 30
Mar 25 21:21:29 DEBUG[2984328112] app_rxfax.c: FLOW T.30 Changing from phase 
T30_PHASE_E to T30_PHASE_CALL_FINISHED
Mar 25 21:21:29 DEBUG[2984328112] app_rxfax.c: FLOW T.38T Set rx type 13
Mar 25 21:21:29 DEBUG[2984328112] app_rxfax.c: FLOW T.38T Set tx type 13
Mar 25 21:21:29 DEBUG[2984328112] app_rxfax.c: FLOW T.38T FAX exchange complete

---

Best regards,
Iain

Attachment: opbx_faxdump.txt.gz
Description: Binary data

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