Hi!

This sounds like a pre-configured conference group, where you dial into a conference, and then the conference server invites all the other participants. The problem is, that you have to wait until all participants have accepted the call before you start speaking.

Maybe a nicer solution would be the PoC (PTT over Cellular) Service, which was recently published by several cell phones manufacturer. This service allows you to use SIP/RTP enabled cell phones in a walky-talky like mode. Info and the specification can be found at: http://www.ericsson.com/products/product_selector/Inst_Talk_hpsol.shtml

regards, Klaus

-----Original Message----- From: Olaf Menzel [mailto:menzel@fokus.fhg.de] Sent: Tuesday, November 11, 2003 1:45 PM To: Olaf Menzel Cc: serdev@lists.iptel.org; serusers@lists.iptel.org; rco@iptel.org Subject: [Serdev] SIP "braodcast"

Hi Jiri, Jan, Raphael and all other Ser users and developers,

as I have already mentioned the demining scenario in our project there is the need of a Voip SIP "broadcast" functionality. This means the resonsable operator should be ready to reach the whole demining group with one call. Because we do not have real braodcast like VHF radio a approach could be the following scenario:

The operator will send a SIP invite to all members of his team and when the user ansers the phone call the call will automaticly transfered to a SIP conference. This is what I have discussed with Raphael. What do you think how to realize such a "broadcast" functionality ??

regards

Olaf

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