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

Anthony Minessale anthony.minessale at gmail.com
Sat Apr 2 00:54:55 MSD 2016


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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