[Freeswitch-users] T38->g711 gateway issues with latest master and v1.6

[Brian West]

Look at

*conf/testing/dialplan/default/0026_fax.xml*

If you can create a self contained test case, similar to how I have in that
file for t.38 passthru then we should be able to make progress faster.

On Fri, Apr 1, 2016 at 3:54 PM, Anthony Minessale <
anthony.minessale at gmail.com> wrote:

> Same eyeballs mostly =D
>
> On Fri, Apr 1, 2016 at 3:42 PM, dave.may at tresta.com <dave.may at tresta.com>
> wrote:
>
>> Is anybody else having trouble with T38 -> g711 gateway with either v1.6
>> or latest master?  Initially I thought my problems might have been limited
>> to calls bridging to mod_freetdm (i.e. T38 in -> PRI out), but today I was
>> able to reproduce the problem using SIP only.
>>
>>
>>
>> I entered a Jira on the issue yesterday, but was hoping that more
>> eyeballs on the problem might reveal something.
>>
>>
>>
>> https://freeswitch.org/jira/browse/FS-9008
>>
>>
>>
>> Not sure if everyone can read Jira tickets, so here's the gist of what I
>> can see happening:
>>
>>
>>
>> - FS1 txfax to FS2
>>
>> - FS2 sets the following parameters, then bridges call to FS3
>>
>> ** fax_enable_t38_request=true
>>
>> ** execute_on_answer=t38_gateway self
>>
>> - FS3 answers, then calls rxfax
>>
>> - bidirectional g711 between FS1/FS2 and FS2/FS3
>>
>> - FS1 sends T38 reinvite to FS2
>>
>> - FS2 responds 100 Trying
>>
>> - FS2 starts sending T38 packets to FS1 (unexpected), while still sending
>> g711 to FS3 (expected)
>>
>> - 39 seconds later FS2 sends BYE to FS1, but using a new CSeq/branch not
>> seen elsewhere in either leg (?)
>>
>> - FS2 finally responds to T38 request from FS1, but with 486 Busy Here
>> instead of 200 OK
>>
>> - FS2 sends repeated BYE to FS1 (e.g. at 1,2,4 seconds)
>>
>>
>>
>> Thanks!
>>
>>
>>
>> Dave.
>>
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>
>
>
> --
> Anthony Minessale II       ♬ @anthmfs  ♬ @FreeSWITCH  ♬
>
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>
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-- 

*Brian West*
brian at freeswitch.org


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