[Freeswitch-users] Empty SDP in 200 OK on received re-invite while faxing with T.38

[Brian West]

Ok, without some logs, or traces I can only guess here, happen to have
those handy in a pastebin?

On Wed, Mar 9, 2016 at 4:59 AM, Dmitry Saratsky <simpot at gmail.com> wrote:

> Hi all,
>
> I found that some of my faxes failed to be sent/received bcz remote PBX
> drop the calls after my FreeSWITCH send empty (without SDP) 200 OK message
> on received re-invite from remote party while sending or receiving fax with
> T.38.
>
> CLIENT > INVITE (G.711) > FS
> FS > 200 OK > CLIENT
> CLIENT > INVITE (T.38) > FS
> FS > 200 OK > CLEINT
> ...
> now receiving fax
> while fax is received, client send me reinvite with the same SDP T.38
> details as in initial T.38 INVITE message. usually it happens after 900 or
> 1800 seconds - probably it kind of keepalive...
> FS > 200 OK (with no SDP) > CLEINT
> now call is dropped(
>
> freeswitch: Version 1.5.15b git 3d64402 2015-03-21 19:55:21Z 64bit
> centos 6 x64
>
> any ideas?
>
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-- 

*Brian West*
brian at freeswitch.org


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