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List: ooh323c-devel
Subject: [ooh323c-devel] (no subject)
From: xx xx <mortex () abv ! bg>
Date: 2006-06-06 8:38:45
Message-ID: 220532005.105221149583125737.JavaMail.nobody () mail04 ! abv ! bg
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Hi,
Thank you for the reply. Please see my comments:
> Does your question is ooh323c should check Progress-Indicator? or >Did you mean \
> ooh323c to generate ALERTING message with Q.931 Progress >Indicator Element?
I mean, ooh3232 to send Alerting message with Q.931 Progress Indicator Element (PI = \
3 or PI=8) and opens the RTP channel before sending CONNECT message, i.e to \
cut-throuh the voice path on both directions and proxy the in-band announcemnts from \
PSTN side.
> I guess, ALERTING means ringtone stage, There is no fake ringtone/Alerting. >Or you \
> can says fake, if other end phone ringer is not working ;)
Yes, good joke :) What I say is that when I call to PSTN (H323 GW -> ASTERISK+SANGOMA \
-> PSTN) my GW plays ringback tone immediately but after 10 sec. the PSTN side rings. \
This is because the H323 GW doesn't receive the PI indicator in the Q.931 ALERTING \
message and thinks it should generate local ring-back tone but not to wait to receive \
it from the PSTN side as it should be. In order to solve this, i think, ooh323 should \
send PI=8 and cut-through the audio path until the call is connected.
> Here: >GnuGK <------- [ ooh323c - asterisk core - SANGOMA FXO(PSTN interface)] \
> ><---- PSTN > >So in Asterisk internal dealing (PSTN to H.323 conversion): >Sangoma \
> > indicates to Asterisk Core (ringing). >Asterisk Core generates ALERTING event for \
> > ooh323c, ooh323c sents ALERTING >to GnuGK. Do you want PI bit here?
No, I talk about the situation when the call from VoiP side is terminated on PSTN \
network. Please see the above explanation.
> If you want to do more than fast start by saying early media. Than you have >to \
> play with non-established channels. >
With "early media" I mean completion of the bearer transmission path of a voice call \
before the call is answered (connected). Waiting for youe comments.
mortex
> -------- Оригинално писмо -------- >От: "Avin Patel" <apatel@obj-sys.com> >Относно: \
> RE: [ooh323c-devel] ooh323 q931 signalling problem >До: "xx xx" <mortex@abv.bg>, \
> <ooh323c-devel@lists.sourceforge.net> >Изпратено на: торник, 2006, Юни 6 02:01:34 \
> EEST >---------------------------------- > >Hi > >> 1. After Wellgate sends SETUP \
> message it normally receives Call >> Proceeding, next Alerting and GW starts to \
> locally generate >> ring-tone. This should be OK if we have no internetworking with \
> >> PSTN. When we have mapping of 2 different protocols there arise >> issuses like \
> > > no ring tone or no announcemnets or fake alerting >> (like in my case with \
> > > ooh323). To cope with this the ISDN switch >> or intermediate GW must send to \
> > > originating party a H323 >> Information Element (IE) called Progress-Indicator \
> > > which tells >> the originating party to wait for the messages (alerting, busy, \
> > > >> "The number you have dialed is no longer in service...", etc.) >> in-band \
> > > > > instead of generating them locally. >> More info on this can be found here: \
> > > > > >> http://www.cisco.com/en/US/tech/tk1077/technologies_tech_note09186 >> \
> > > > > > > a0080094c33.shtml > >Does your question is ooh323c should check \
> > > > > > > Progress-Indicator? or >Did you mean ooh323c to generate ALERTING \
> > > > > > > message with Q.931 Progress >Indicator Element? > >I guess, ALERTING \
> > > > > > > means ringtone stage, There is no fake ringtone/Alerting. >Or you can \
> > > > > > > says fake, if other end phone ringer is not working ;) > >Here: >GnuGK \
> > > > > > > <------- [ ooh323c - asterisk core - SANGOMA FXO(PSTN interface)] \
> > > > > > > ><---- PSTN > >So in Asterisk internal dealing (PSTN to H.323 \
> > > > > > > > conversion): >Sangoma indicates to Asterisk Core (ringing). >Asterisk \
> > > > > > > > Core generates ALERTING event for ooh323c, ooh323c sents ALERTING >to \
> > > > > > > > GnuGK. Do you want PI bit here? > > > >> 2. I think currently ooh323 \
> > > > > > > > doesn't support "early media", i.e >> doesn't open the RTP channel \
> > > > > > > > after receiving alerting and doesn't >> support faststart in messages \
> > > > > > > > before CONNECT. In this way if I >> put the PI=8 in H.323 Alerting \
> > > > > > > > message I don't hear alerting tone >> because the channel is not \
> > > > > > > > opened from Asterisk side and the >> signalling messages can't \
> > > > > > > > pass-through. >> I think these features are very important for H323 \
> > > > > > > > channel >> because most of the time we deal with PSTN networks, \
> > > > > > > > either for >> terminating or originating and no fake signalling is \
> > > > > > > > acceptable. >> >> Hope to have answered some of the questions from \
> > > > > > > > the other users. >> I will appreciate if someone help me in coding \
> > > > > > > > these. I think it >> is not too much work! >> > >What you mean by \
> > > > > > > > "faststart in messages before CONNECT". ooh323c supports >faststart. \
> > > > > > > > >And faststart can get performed before CONNECT message. > >If you \
> > > > > > > > > want to do more than fast start by saying early media. Than you \
> > > > > > > > > have >to play with non-established channels. > >Regards, >Avin \
> > > > > > > > > Patel >Objective Systems, Inc. > > > >> -----Original Message----- \
> > > > > > > > > >> From: xx xx [mailto:mortex@abv.bg] >> Sent: Monday, June 05, \
> > > > > > > > > > > 2006 4:51 PM >> To: ooh323c-devel@lists.sourceforge.net >> \
> > > > > > > > > > > Subject: [ooh323c-devel] ooh323 q931 signalling problem >> >> \
> > > > > > > > > > > >> Hi all, >> I have playing around to find what is the problem \
> > > > > > > > > > > > > with the "fake >> alerting" and ooh323 channel. I made a \
> > > > > > > > > > > > > test with GnuGK (2.2.2), >> Asterisk 1.2.7.1, ooh323 from \
> > > > > > > > > > > > > asterisk-addons-1.2.3. The config >> is following: >> >> \
> > > > > > > > > > > > > Wellgate FXS GW <------>GNUGK <---------> ASTERISK >> \
> > > > > > > > > > > > > (ooh323)+SANGOMA FXO<-----------> PSTN >> >> So, what I \
> > > > > > > > > > > > > have found: >> 1. After Wellgate sends SETUP message it \
> > > > > > > > > > > > > normally receives Call >> Proceeding, next Alerting and GW \
> > > > > > > > > > > > > starts to locally generate >> ring-tone. This should be OK \
> > > > > > > > > > > > > if we have no internetworking with >> PSTN. When we have \
> > > > > > > > > > > > > mapping of 2 different protocols there arise >> issuses \
> > > > > > > > > > > > > like no ring tone or no announcemnets or fake alerting >> \
> > > > > > > > > > > > > (like in my case with ooh323). To cope with this the ISDN \
> > > > > > > > > > > > > switch >> or intermediate GW must send to originating party \
> > > > > > > > > > > > > a H323 >> Information Element (IE) called \
> > > > > > > > > > > > > Progress-Indicator which tells >> the originating party to \
> > > > > > > > > > > > > wait for the messages (alerting, busy, >> "The number you \
> > > > > > > > > > > > > have dialed is no longer in service...", etc.) >> in-band \
> > > > > > > > > > > > > instead of generating them locally. >> More info on this \
> > > > > > > > > > > > > can be found here: >> \
> > > > > > > > > > > > > \
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-----------------------------------------------------------------http://www.sportni.bg/worldcup/ \
- Германия 2006 - Световното първенство по футбол наближава!
-----------------------------------------------------------------http://www.sportni.bg/worldcup/ \
- Германия 2006 - Световното първенство по футбол наближава!
_______________________________________________ooh323c-devel mailing \
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