[asterisk-users] FFA SendFax rejects T.38 reINVITE (488 Not acceptable here)

[Kevin P. Fleming]

On 10/19/2010 10:48 AM, VoIP Question wrote:
> We don't have an ATA and fax machine.
> 
> The whole point (as I specified in the header and initial message) is
> the attempt to use "Fax for Asterisk" to send the message.
> 
> As I showed in the logs, the remote carrier sends a proper T.38
> reINVITE, but our Asterisk doesn't accept, despite the fact that this
> provider is defined in sip.conf with both canreinvite and t38pt_udptl
> enabled, so the only question is (as far as we understand) is why in
> this scenario, the T.38 is rejected.
> 
> Here are the logs (sip debug is open) again, since we get the reINVITE:

Is the SendFAX application running when this re-INVITE is received? You
didn't actually include a complete console log, only the SIP traces, so
we can't see what was happening in Asterisk at this time. You also
didn't include an Asterisk version number (or any version numbers), so
we can't be sure whether the problem you are seeing is a known resolved
one or not.

Please post the complete console log, with all logger levels enabled, so
we can see the entire timeline of the call up to the failure occurring.
If the re-INVITE arrives before SendFAX is started, there won't be an
application to respond to it, and chan_sip will (rightly) assume that
T.38 cannot be used on this channel so it will respond with a 488.

-- 
Kevin P. Fleming
Digium, Inc. | Director of Software Technologies
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
skype: kpfleming | jabber: kfleming at digium.com
Check us out at www.digium.com & www.asterisk.org