There may be a magic event you can send to do this.  I can't recall if we did that for options or just info/notify.  A grep for nua_options in mod_sofia dir should answer the question.

Mike

On Aug 20, 2009, at 11:16 AM, Michael Collins wrote:



2009/8/18 Christian Löschenkohl <christian.loeschenkohl@xpirio.com>
hi

does anybody know how to send a sip options message to a registered user, using the event socket
or something else build in freeswitch
i think the ping parameter does something like this for gateways.

what i want/need is the same thing that is provided in asterisk with the qualifying option,
to see how "reachable" a certain client is.
 
Nothing exists at present but Mathieu Rene was looking at possibly adding an API to do this. Stay tuned for more information...

-MC


br

--
Ing. Christian Löschenkohl
Technische Leitung, Forschung & Entwicklung VoIP