RFC 5373 can help; however because of security concerns (section 7), it likely won't allow you to override the deactivation of the feature unless the phone knows/trusts that such an override should occur.
> -----Original Message----- > From: [email protected] [mailto:sip- > [email protected]] On Behalf Of Saúl Ibarra > Sent: Tuesday, March 02, 2010 2:36 AM > To: Jaikar Nalthooru > Cc: [email protected] > Subject: Re: [Sip-implementors] Announcement/Paging in SIP > > Hi, > > On Tue, Mar 2, 2010 at 5:21 AM, Jaikar Nalthooru <[email protected]> > wrote: > > Thanks a lot Indresh. I mainly looking for Audio paging > implementation in SIP. Our VOIP phones will be installed in Mall and > Hospital environments. There will periodic and emergency announcement > to people. While announcement Phone may be in Idle mode or it may be in > active call. But announcement should get higher priority. In summary, > > 1. Phone should attend the call even in idle mode and auto answer is > not enabled. There will not be any attendances. Can we use answer-mode > or prev-answer mode for this? > > I've not found a document where this is specified, but I've seen this > feature implemented using the Call-Info header like this: > > Call-Info: sip:192.168.20.1; answer-after=0 _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
