[Freeswitch-users] T.38/fax problem

[Marcin Gozdalik]

I have a pcap and can open in Wireshark. Starts with PCMU, switches to
T.38. Wireshark (newest, 1.8.3) has trouble dissecting some packets (lots
of UNKNOWN PER) and unfortunately I am no expert to tell if there is
anything wrong.

Would anybody be able to help in debugging the issue having the PCAP? I can
post it somewhere to download.

Best regards

2012/10/17 Michael Collins <msc at freeswitch.org>

> Can you get a pcap of this and open in wireshark? I think it might give
> you a bigger picture of what's happening.
> -MC
>
> On Wed, Oct 17, 2012 at 7:02 AM, Marcin Gozdalik <gozdal at gmail.com> wrote:
>
>> 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
>>
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:
>> consulting at freeswitch.org
>> http://www.freeswitchsolutions.com
>>
>> 
>> 
>>
>> Official FreeSWITCH Sites
>> http://www.freeswitch.org
>> http://wiki.freeswitch.org
>> http://www.cluecon.com
>>
>> FreeSWITCH-users mailing list
>> FreeSWITCH-users at lists.freeswitch.org
>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
>> http://www.freeswitch.org
>>
>>
>
>
> --
> Michael S Collins
> Twitter: @mercutioviz
> http://www.FreeSWITCH.org
> http://www.ClueCon.com
> http://www.OSTAG.org
>
>
>
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
> 
> 
>
> Official FreeSWITCH Sites
> http://www.freeswitch.org
> http://wiki.freeswitch.org
> http://www.cluecon.com
>
> FreeSWITCH-users mailing list
> FreeSWITCH-users at lists.freeswitch.org
> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
> http://www.freeswitch.org
>
>


-- 
Marcin Gozdalik
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.freeswitch.org/pipermail/freeswitch-users/attachments/20121017/8f675c34/attachment.html