Hi

I'm trying to send a fax from FreeSWITCH using T.38 (via Cisco SIP gateway)
to a remote fax. It fails with some cryptic messages:

2012-10-17 15:51:30.467990 [DEBUG] mod_spandsp_fax.c:286 FLOW T.30 T4A
expired in phase T30_PHASE_D_RX, state 27. An HDLC frame lasted
too long.
2012-10-17 15:51:30.467990 [DEBUG] mod_spandsp_fax.c:286 FLOW T.30 Status
changing to 'The HDLC carrier did not stop in a timely manne
r'
2012-10-17 15:51:30.467990 [DEBUG] mod_spandsp_fax.c:286 FLOW T.30
Disconnecting
2012-10-17 15:51:30.467990 [DEBUG] mod_spandsp_fax.c:286 FLOW T.30 Changing
from phase T30_PHASE_D_RX to T30_PHASE_E

I do have full SIP/RTP dump of such a call if it is of any interest. It
seems to be a peculiar interoperability issue, as this setup is used as a
email2fax/fax2email gateway and it works quite well.

Could anybody recommend any steps I could try to debug/fix the issue?

Best regards

-- 
Marcin Gozdalik