[Freeswitch-dev] [Freeswitch-users] Doubts about T38 passthru

[Anthony Minessale]

indeed she is, b2bua is 2 separate dialogs where proxy has the
connivence of forwarding 1 dialog.


On Thu, Aug 30, 2012 at 10:24 AM, François Delawarde
<fdelawarde at wirelessmundi.com> wrote:
> The provider's SDP is weird anyway, like if it wanted to send me a fax
> when putting me on hold (?).
>
> My mum always said that there is nothing (even proxy things) that can't
> be done with a b2bua. Was she wrong?
>
> François.
>
>
> On Wed, 2012-08-29 at 11:48 -0500, Anthony Minessale wrote:
>> Because FS is a b2bua it probably only snaps to what type of channel
>> the B leg is.
>> FS is not a proxy and only has modest ability to emulate a few proxy behaviors.
>>
>>
>> On Wed, Aug 29, 2012 at 11:43 AM, François Delawarde
>> <fdelawarde at wirelessmundi.com> wrote:
>> > Hi,
>> >
>> > Sent to the wrong ML, this probably is more a dev question:
>> >
>> > On Wed, 2012-08-29 at 10:46 +0200, François Delawarde wrote:
>> >> Hi,
>> >>
>> >> Whenever my provider puts me on hold, it reINVITES with an SDP
>> >> containing both audio (sendonly) and image media like so:
>> >>
>> >> ...
>> >> m=audio 5320 RTP/AVP 18 3 8 0 96
>> >> c=IN IP4 <ip_address>
>> >> a=rtpmap:18 G729/8000
>> >> a=rtpmap:3 GSM/8000
>> >> a=rtpmap:8 PCMA/8000
>> >> a=rtpmap:0 PCMU/8000
>> >> a=sendonly
>> >> a=rtpmap:96 telephone-event/8000
>> >> m=image 5322 udptl t38
>> >> c=IN IP4 <ip_address>
>> >> a=T38FaxVersion:0
>> >> a=T38MaxBitRate:14400
>> >> a=T38FaxUdpEC:t38UDPRedundancy
>> >> a=T38FaxRateManagement:transferredTCF
>> >>
>> >>
>> >> Not sure if it's a non-standard SDP, but that's what I get. Now when
>> >> t38_passthru=true, it only forwards the "image" part to the other leg.
>> >> When t38_passthru=false, it only forwards the "audio" part.
>> >>
>> >> Is there a way to make t38_passthru forward the audio part as well? Or
>> >> should I just change to a better provider?
>> >
>> > Thanks,
>> > François.
>
>
> _________________________________________________________________________
> 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-dev mailing list
> FreeSWITCH-dev at lists.freeswitch.org
> http://lists.freeswitch.org/mailman/listinfo/freeswitch-dev
> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-dev
> http://www.freeswitch.org



-- 
Anthony Minessale II

FreeSWITCH http://www.freeswitch.org/
ClueCon http://www.cluecon.com/
Twitter: http://twitter.com/FreeSWITCH_wire

AIM: anthm
MSN:anthony_minessale at hotmail.com
GTALK/JABBER/PAYPAL:anthony.minessale at gmail.com
IRC: irc.freenode.net #freeswitch

FreeSWITCH Developer Conference
sip:888 at conference.freeswitch.org
googletalk:conf+888 at conference.freeswitch.org
pstn:+19193869900