On 10/11/2011 01:50 AM, Jeremy Kister wrote:
I'm trying to receive a t.38 fax from a Metaswitch 7.3. I have full
control over the metaswitch, but it is in production.
I have the Metaswitch hooked to Asterisk 1.8.7.0 (middleman named s3).
Then I have the target Asterisk 1.8.7.0 with res_fax_digum 1.8.4_1.3.0
(named pbx1) registered to s3.
attempts to receive fax over t.38 always error in res_fax with "fax
session timed-out"
i have debug output at:
http://jeremy.kister.net/tmp/t38/pbx1.txt
http://jeremy.kister.net/tmp/t38/s3.txt
It appears that the FAX transaction attempted training a few times and
failed, then fell back to audio mode (or the calling endpoint hung up).
is the UDPTL debug on pbx1.txt (near line 474) interesting in that
LOG_TAG(s) is evaluated to 'SIP/' ?
This bug with UDPTL debug messages was just fixed last week.
I don't think my (sip|udptl|extensions).conf are interesting, but i'd be
happy to post them. the only interesting tidbit is that when i changed
't38pt_udptl=yes' to 'yes,none' or 'yes,redundancy' the fax would fail
with 't38 negotiation failed".
Well, as a starting point, I'd suggest disabling directmedia
(canreinvite) on s3. It should be possible for directmedia to be enabled
for RTP and not interfere with UDPTL, but there could still be lingering
problems there.
--
Kevin P. Fleming
Digium, Inc. | Director of Software Technologies
Jabber: [email protected] | SIP: [email protected] | Skype: kpfleming
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
Check us out at www.digium.com & www.asterisk.org
--
_____________________________________________________________________
-- Bandwidth and Colocation Provided by http://www.api-digital.com --
New to Asterisk? Join us for a live introductory webinar every Thurs:
http://www.asterisk.org/hello
asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
http://lists.digium.com/mailman/listinfo/asterisk-users
