[standards-jig] VoIP and Jabber

Ulrich Staudinger chicago5 at gmx.de
Tue Apr 1 14:05:59 UTC 2003

Hi Craig,

to answer the easy stuff:
you can signal your numbers via a set vCard. Most clients support vcards,
although some implement their own vCard data (comparing Yabber and Exodus).

have a good start,

> To all,
>    As one of the co-authors of the OpenH323 project (used by many VoIP 
> projects, including GnomeMeeting), and as someone who has just started 
> getting into Jabber in a big way, I am interested in working with
> interested 
> parties to move ahead on the integration of VoIP functions into Jabber.
>    I've seen some of the previous emails re VoIP on this list 
> (http://mailman.jabber.org/pipermail/standards-jig/2003-March/002755.html 
> and 
> and those seem to be heading towards duplicating the signalling functions
> of 
> H.323 and SIP using the Jabber protocol. While this would be possible, I 
> really don't think this is the right approach. VoIP is a LOT more complex 
> than just exchanging IP addresses and port numbers: think about call 
> deflection, conferences, integration with existing voice networks, sending
> progress tones, out of band DTMF tones, and call routing. Trust me, you 
> don't want to get into it if you can avoid it :)
>   Jabber has the potential to be much more than just duplicating the 
> signalling functions of H.323 or SIP. Being able to advertise a normal 
> telephone number for voice calls using Jabber would be very useful. Or a
> fax 
> number, or integration with SMS messaging, and so on.
>   Is there are a standard way for a Jabber user to advertise any voice or 
> video related information via a Jabber server? That is, is there a
> standard 
> way for me to include a telephone number in my externally visible Jabber 
> information? Can I specify my cell phone number, or my landline number?
> Can 
> I specify the address and port of my H.323 phone or my SIP phone? Can I 
> indicate that I can do audio and/or video? Can I select what users can see
> what information? I'd like this right now - is there a standard for this?
>    I am also interested in starting an effort within the H.323 community
> to 
> define a standard way for the H.323 protocol to interface to IMPP systems 
> and Jabber. This may require the definition of new messages and structures
> within H.323 - if anyone is interested in this, then please contact me.
>   The SIP community already seems to working on their own solution to
> this. 
> Rosenberg has his own strong opinions on this, and whilst OpenH323 is 
> working to include the SIP protocol (via the Opal project), I will leave
> the 
> specifics of how SIP handles this to others who have more time.
>    I am already working on these kinds of ideas, and would be very 
> interested in talking or emailing with others who would like to work on it
> also. Whilst I am a newbie as far as Jabber is concerned, I have lots of 
> experience in VoIP and would be happy to bring that to bear on the
> problem.
>   BTW: for those who do not know, OpenH323 can be found at 
> http://www.openh323.org and runs on Linux, Windows, *BSD, and OSX (among 
> others).
>    Craig Southeren
> P.S - sorry for the use of hotmail - my main work machine is down right
> now 
> and I cannot access my normal email account until I get it running again
> :(
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Ulrich Staudinger http://www.die-horde.de
Product Manager @ http://ignite.dtedu.net/ 
JID: uls at jabber.org 

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