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

Anthony Minessale anthony.minessale at gmail.com
Mon Feb 28 21:45:25 MSK 2011 

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
>
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>



-- 
Anthony Minessale II

FreeSWITCH http://www.freeswitch.org/
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AIM: anthm
MSN:anthony_minessale at hotmail.com
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