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AW: [Sip] Sending an announcement!!
Hi Bernd,
just include the announcement UA in the forking. If then someone else
picks up (what a surprise) the phone has to deal with it. It will then
receive another SDP answer.
Please also take a look at Alert-Info.
CS
> -----Ursprüngliche Nachricht-----
> Von: sip-admin@ietf.org [mailto:sip-admin@ietf.org] Im Auftrag von
> Kolinowitz Bernd
> Gesendet: Dienstag, 2. September 2003 15:50
> An: 'SIP list'
> Betreff: [Sip] Sending an announcement!!
>
>
> Hi!
>
> We want to implement a typical PSTN feature in our SIP proxy. If
caller A
> sends an INVITE (including audio in the sdp) to the sip-proxy, the
proxy
> should send an announcement (like a jingle) to caller A while it is
trying
> to reach the callee.
>
> We are now searching for a way to implement the feature concerning RFC
> 3264 (offer/answer model of SDP). First we thought to answer with
early
> media, that means to send a 183 response including the SDP for the
> announcement and demanding a PRACK request.
> Next we have thought to forward the 200 response from the callee to
the
> caller.
> Now there is our problem: What should the caller do with the SDP?
>
> The good version: He accept the SDP from the callee as an answer of
his
> SDP offer in the first INVITE-request and sends an empty ACK.
> The bad version: The SDP in the 200 response will be treated as a new
> offer and he sends an SDP answer in the ACK request.
>
> How will the client react? Is there another way to realize this
feature?
>
> Thanks in advance
> Bernd
>
>
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> Use sipping@ietf.org for new developments on the application of sip
_______________________________________________
Sip mailing list https://www1.ietf.org/mailman/listinfo/sip
This list is for NEW development of the core SIP Protocol
Use sip-implementors@cs.columbia.edu for questions on current sip
Use sipping@ietf.org for new developments on the application of sip