Re: [Freeswitch-users] Issue when receiving INVITE with both audio and image (T38)

18 Aug 2013

      There you go:

http://jira.freeswitch.org/browse/FS-5714

Thanks,
François.

On Fri, 2013-08-16 at 13:01 -0500, Anthony Minessale wrote:
...
Sure
On Aug 16, 2013 11:14 AM, "François" <fdelawarde@wirelessmundi.com>
wrote:
Thanks for the tip. Should I add a JIRA ticket?
François.
On Fri, 2013-08-16 at 10:00 -0500, Anthony Minessale wrote:
        > We can investigate that,  Meanwhile you could use regex in
        your
        > dialplan for this situation and set
        "sip_ignore_reinvites=true" to
        > mitigate.
        >
        >
        >
        >
        > On Fri, Aug 16, 2013 at 8:56 AM, François
        > <fdelawarde@wirelessmundi.com> wrote:
        >         Hello list,
        >
        >         I've seen several gateways (Patton, Audiocodes,
        Nortel CS2K),
        >         sending
        >         both audio+image (T38) in the initial INVITE. In a
        simple
        >         bridge
        >         scenario, FS will just ignore the T38 part and setup
        an audio
        >         connection
        >         only with b-leg.
        >
        >         My issue is later on if/when we receive a re-INVITE
        (ex: SIP
        >         timers
        >         refresh) with the same SDP (audio+T38), FS now
        considers it as
        >         FAX and
        >         sends a re-INVITE to b-leg with T38 only! In case
        the
        >         destination is
        >         voice only, the call hangs up.
        >
        >         ---
        >
        >         Asterisk apparently had the same issue, they solved
        it by
        >         setting up
        >         both streams on a-leg (RTP + UDPTL). If they receive
        packets
        >         on UDPTL
        >         they just re-INVITE b-leg with T38.
        >
        >         See: https://reviewboard.asterisk.org/r/208/
        >         Also:
        https://issues.asterisk.org/jira/browse/ASTERISK-11843
        >
        >         Is this the right way to go? (Also is it feasible in
        >         FreeSwitch)? I can
        >         add a JIRA if necessary.
        >
        >         Thanks,
        >         François.
        >
        >
        >
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