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

Sat Feb 26 03:28:46 MSK 2011

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