[Freeswitch-users] Sharing Presence Information Across Separate Offices

Michael Jerris mike at jerris.com
Thu Aug 20 11:25:51 PDT 2009

Check out mod_event_multicast.  I think you should be able to share  
using that to share events between boxes (although I have never tried  


On Aug 20, 2009, at 4:29 AM, afshin afzali wrote:

> Hi Kenneth,
> I'm not going to answer your question! Instead I would like to  
> emphasize on the thing you are going to achieve because some times  
> ago I've post this question in some other title but unfortunately  
> did not get any answer. As the SIP protocol's point of view you  
> should be able to subscribe every FreeSWITCH machines for external  
> events in another one (or probably in a central PRESENCE server such  
> as SER) to get NOTIFY messages which indicate the information you  
> wish to have. Although the sofia SIP endpoint can do this (as you  
> can find in its features) I could not find any guidelines for it in  
> Regards,
> -- Afshin Afzali   
> On Thu, Aug 20, 2009 at 10:21 AM, Kenneth Shaw <ken at expitrans.com>  
> wrote:
> I apologize in advance if this message duplicates a previous post or  
> the topic has been covered elsewhere. If that's the case, a pointer  
> would be appreciated!
> I have multiple offices each running Freeswitch and a number of  
> Polycom phones and softphones.
> I would like to share the presence information between the offices,  
> such that if a person in Office B can see if a person in Office A is  
> on the phone. I personally don't know of any way to do this through  
> Freeswitch as it stands. I have thought about using a VPN for the  
> offices and just setting up the phones to all register to a single  
> server, however I don't want calls between phones in the same office  
> (intra-office) to have to be routed all the way through a different  
> office, which may be on the other side of the world and costs  
> bandwidth.
> Any suggestions as to the best way to accomplish this would be  
> greatly appreciated. Thanks!
> --
> Kenneth Shaw
> ExpiTrans, Inc.
> 129 W. Wilson St., Suite 204
> Costa Mesa, CA 92627
> tel: 949.650.4600
> fax: 949.642.6044
> ken at expitrans.com

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