[Freeswitch-users] t38_gateway self - no re-Invite?

Tue Mar 1 05:49:03 MSK 2011

Awesome! I'll add this to the list of things to document...

-MC

On Mon, Feb 28, 2011 at 10:45 AM, Anthony Minessale <
anthony.minessale at gmail.com> wrote:

> I added a variable to latest GIT
>
> sip_execute_on_image
>
> This is like execute_on_answer but it lets you execute an application
> as soon as you get a T.38 invite.
> This will probably allow you to change over to t38_gateway etc.
>
>
> On Sat, Feb 26, 2011 at 2:56 PM, Clemens Ebentheuer <ce at kapper.net> wrote:
> > Extra Info here:
> >
> > Just to verify that zoiper is not sending the CNG and that it is not a
> frequency issue like Helmut had, I downloaded a tonegenerator and played an
> 1100HZ tone when T38_gateway waits for it (switch_ivr_async.c:2608 Adding
> tone spec 1100.0 index 0 hits 1)
> >
> > T38 FAX was successfully gatewayed to g711.
> >
> > Thx again,
> >
> > clemens
> >
> >> Subject: RE: [Freeswitch-users] t38_gateway self - no re-Invite?
> >>
> >> Ok,
> >>
> >> I think I kick the Zoiper Softphone for testing and get my spa2102 - I
> >> think Zoiper does not send any CNG or CED...
> >>
> >> Thanks a lot - I´ll return with ATA experience,
> >>
> >>
> >> clemens
> >>
> >> >
> >> > like I said I don't know you topology but you neeed to get the
> >> gateway
> >> > to detect the CNG tone going the right way so the app will react to
> >> > that and transfer it to the data bridge where it will be ready to
> >> > handle t.38 or audio.
> >> >
> >> > if you don't see it detecting the tone you are not making it very
> >> far.
> >> >
> >> >
> >> > On Fri, Feb 25, 2011 at 5:54 PM, Clemens Ebentheuer <ce at kapper.net>
> >> > wrote:
> >> > > Yes, tried that too - no luck - both, self and peer
> >> > >
> >> > > When I try to send the fax to an extension with rxfax, all is
> >> working
> >> > fine.
> >> > >
> >> > > Zoiper invites pcma ->
> >> > > freeswitch OK ->
> >> > > Zoiper reinvites t38 ->
> >> > > freeswitch TRYING ->
> >> > > fresswitch executes rxfax - mod_spandsp_fax.c "reads" the t38 sdp->
> >> > > freeswitch sends OK with t38 sdp ->
> >> > >
> >> > > any other ideas?
> >> > >
> >> > >
> >> > >> I dont know what your topology is but did you also try setting the
> >> > app
> >> > >> on the A leg and try both peer and self
> >> > >>
> >> > >> <action application="t38_gateway" data="self"/>
> >> > >>
> >> > >> right before bridge.
> >> > >>
> >> > >>
> >> > >> On Fri, Feb 25, 2011 at 4:36 PM, Clemens Ebentheuer
> >> <ce at kapper.net>
> >> > >> wrote:
> >> > >> > Hi
> >> > >> >
> >> > >> > My way:
> >> > >> >
> >> > >> > internal:t38(zoiper) -> FS -> external:g711 (provider with no
> >> t38
> >> > >> support)
> >> > >> >
> >> > >> > I tried all versions of set and export and peer and self - but
> >> no
> >> > >> luck- for my understanding it should work with set t38_gateway
> >> self
> >> > >> >
> >> > >> > Set because of aleg and self because FS acts as the T38 fax
> >> > >> "receiver".
> >> > >> >
> >> > >> > Am I wrong here?
> >> > >> >
> >> > >> > My dialplan:
> >> > >> > <extension name="0-sil-p000016" >
> >> > >> >   <condition field="destination_number" expression="^0(.*)$">
> >> > >> >       <action application="set" data="fax_enable_t38=true"/>
> >> > >> >       <action application="set"
> >> > data="execute_on_answer=t38_gateway
> >> > >> self"/>
> >> > >> >       <action application="bridge" data="sofia/gateway/sil-
> >> > >> p000016/$1"/>
> >> > >> >   </condition>
> >> > >> > </extension>
> >> > >> > (testet with and without fax_enable_t38_request=true)
> >> > >> >
> >> > >> > Thx,
> >> > >> >
> >> > >> >
> >> > >> > Clemens
> >> > >> >
> >> > >> >
> >> > >> >
> >> > >> >
> >> > >> >> have you tried the self vs peer args to the t38 gateway app,
> >> > maybe
> >> > >> you
> >> > >> >> have it configured backwards.
> >> > >> >>
> >> > >> >>
> >> > >> >> On Fri, Feb 25, 2011 at 4:11 PM, Clemens Ebentheuer
> >> > <ce at kapper.net>
> >> > >> >> wrote:
> >> > >> >> > Hi,
> >> > >> >> >
> >> > >> >> >> It can be, that in your case the device is simply detecting
> >> > the
> >> > >> FAX
> >> > >> >> >> tones itself before FS does. When the device sends a
> >> ReINVITE
> >> > to
> >> > >> FS
> >> > >> >> FS
> >> > >> >> >> has no chance to detect CNG anymore and hence never switch
> >> to
> >> > >> t38.
> >> > >> >> >
> >> > >> >> > Maybe you´re right here - or zoiper
> >> > >> >> (http://www.zoiper.com/softphone/classic/ which is a softphone
> >> > with
> >> > >> >> only t38 fax support [no g711 fallback]) sends the reinvite
> >> every
> >> > >> time
> >> > >> >> after answer when it is sending a fax.
> >> > >> >> >
> >> > >> >> >>
> >> > >> >> >> Just trace the sending FAX-Device for SIP-Signalling and you
> >> > >> should
> >> > >> >> se
> >> > >> >> >> a
> >> > >> >> >> ReINVITE from FAX-device to FS, if this is true.
> >> > >> >> >
> >> > >> >> > Here is a debug with siptrace:
> >> > >> http://pastebin.freeswitch.org/15439
> >> > >> >> >
> >> > >> >> > If I read the logs in a right way:
> >> > >> >> > then FS executes t38_gateway on answer -
> >> > >> >> > sends a 200 OK to zoiper -
> >> > >> >> > zoiper answers with ACK and then reinvites with t38 -
> >> > >> >> > FS answers 100 Trying-
> >> > >> >> >
> >> > >> >> > And nothing is happening. I´m not sure if this is the
> >> scenario
> >> > you
> >> > >> >> describe below, but shouldn´t FS answer with a t38 sdp so
> >> zoiper
> >> > >> knows
> >> > >> >> where to send it´s t38 fax??
> >> > >> >> >
> >> > >> >> >>
> >> > >> >> >> You should check your t38-Device configuration. See if it is
> >> > able
> >> > >> to
> >> > >> >> >> let
> >> > >> >> >> the t38 fax detection job only by FS.
> >> > >> >> >>
> >> > >> >> >> Establish a call from the Fax device to a phone. Can your
> >> hear
> >> > >> the
> >> > >> >> CNG
> >> > >> >> >> signal when you pickup the phone? Does it suddenly stop? If
> >> > so,
> >> > >> the
> >> > >> >> FAX
> >> > >> >> >> device or FS/mod_spandsp has sent a t38-ReINVITE.
> >> > >> >> >>
> >> > >> >> >> Do you see something like "media Bug removed" in FS console
> >> > >> (DEBUG
> >> > >> >> >> level) after 20 seconds of listening to 1100Hz? If so, then
> >> FS
> >> > >> >> failed
> >> > >> >> >> to
> >> > >> >> >> detect CNG, hence it never received it (or for too short to
> >> > >> detect
> >> > >> >> it).
> >> > >> >> >>
> >> > >> >> >> On my Grandstream ATAs this wasn't possible, so I had to
> >> > search
> >> > >> for
> >> > >> >> a
> >> > >> >> >> hack.
> >> > >> >> >>
> >> > >> >> >> Hope this will light up your problems a little bit.
> >> > >> >> >>
> >> > >> >> >>
> >> > >> >> >> > If so, I´m wondering why rxfax in t38 mode is working fine
> >> > then
> >> > >> -
> >> > >> >> >> with re-invite.
> >> > >> >> >> Can't tell you with this, never tried that. sorry.
> >> > >> >> >
> >> > >> >> > Thx,
> >> > >> >> >
> >> > >> >> > clemens
> >> > >> >> >
> >> > >> >> > _______________________________________________
> >> > >> >> > FreeSWITCH-users mailing list
> >> > >> >> > FreeSWITCH-users at lists.freeswitch.org
> >> > >> >> > http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
> >> > >> >> >
> >> > >>
> >> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-
> >> > >> >> users
> >> > >> >> > 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
> >> > >> >>
> >> > >> >> _______________________________________________
> >> > >> >> FreeSWITCH-users mailing list
> >> > >> >> FreeSWITCH-users at lists.freeswitch.org
> >> > >> >> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
> >> > >> >>
> >> > UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-
> >> > >> >> users
> >> > >> >> http://www.freeswitch.org
> >> > >> >
> >> > >> > _______________________________________________
> >> > >> > FreeSWITCH-users mailing list
> >> > >> > FreeSWITCH-users at lists.freeswitch.org
> >> > >> > http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
> >> > >> >
> >> > UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-
> >> > >> users
> >> > >> > 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
> >> > >>
> >> > >> _______________________________________________
> >> > >> FreeSWITCH-users mailing list
> >> > >> FreeSWITCH-users at lists.freeswitch.org
> >> > >> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
> >> > >>
> >> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-
> >> > >> users
> >> > >> http://www.freeswitch.org
> >> > >
> >> > > _______________________________________________
> >> > > FreeSWITCH-users mailing list
> >> > > FreeSWITCH-users at lists.freeswitch.org
> >> > > http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
> >> > > UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-
> >> > users
> >> > > 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
> >> >
> >> > _______________________________________________
> >> > FreeSWITCH-users mailing list
> >> > FreeSWITCH-users at lists.freeswitch.org
> >> > http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
> >> > UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-
> >> > users
> >> > http://www.freeswitch.org
> >
> > _______________________________________________
> > FreeSWITCH-users mailing list
> > FreeSWITCH-users at lists.freeswitch.org
> > http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
> > UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
> > 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
>
> _______________________________________________
> FreeSWITCH-users mailing list
> FreeSWITCH-users at lists.freeswitch.org
> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
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>
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