[Freeswitch-dev] Session Progress and RINGING

[Bernhard Suttner]

Hi,

session progress does have SDP which will then go through to A. But on the display of A it will only display "session progress" and not Ringing. If A is now a ISDN Gateway and has to signalize RINGING into the "ISDN world". I am not sure, if RINGING will be used for A to generate the ringback tone for itself on every device. This behaves on the client/device configuration. 

There was a nice discussion about this "issue" on the sip-implementors list:

http://www.mail-archive.com/sip-implementors@lists.cs.columbia.edu/msg06400.html

There is a RFC for this case (Section: 3.2.  Ringing Tone Generation)
http://www.rfc-editor.org/rfc/rfc3960.txt

What do you think?

Best regards,
Bernhard Suttner



----- Original Message -----
From: Anthony Minessale [mailto:anthony.minessale at gmail.com]
To: freeswitch-dev at lists.freeswitch.org
Sent: Thu, 04 Nov 2010 16:54:30 +0100
Subject: Re: [Freeswitch-dev] Session Progress and RINGING


> no, once it gets session progress it will not send any ringing.
> The sip side 180 ringing is used to tell the phone to generate its own
> inband ringing.
> 
> does your 183 session progress contain a sdp?
> 
> 
> On Thu, Nov 4, 2010 at 10:25 AM, Bernhard Suttner
> <bernhard.suttner at winet.ch> wrote:
> > Hi,
> >
> > A ---> FS ---> B
> >
> > B does send a Session Progress to FS. FS will forward the Session Progress
> to A.
> > B does send a RINGING to FS. FS does _not_ forward this to A.
> >
> > Could it be, that the check the switch_test_flag(channel, CF_EARLY_MEDIA)
> in mod_sofia.c within the INDICATE_RINGING section is wrong. I think it is
> allowed to send the Session Progress first and later the RINGING. The
> ringing is for example for SIP/ISDN gateways necessary.
> >
> > Any hint is appreciated.
> >
> > Best regards,
> > Bernhard Suttner
> >
> >
> >
> > _______________________________________________
> > 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
> 
> _______________________________________________
> 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
>