<div dir="ltr"><div><div><div>I think it's very difficult:<br></div>most SIP communications are done with SDP data passed in INVITE message.<br></div>So basically, Callee is able to send Early Media to Caller but the opposite can't happen until Callee has sent back its SDP data, which happens when Callee accepts the incoming call.<br><br></div>Maybe a "smart" Caller could read where reverse Early Media comes from and this address to send Early Media.<br></div><div class="gmail_extra"><br><div class="gmail_quote">2016-02-04 15:10 GMT+01:00 Alan <span dir="ltr"><<a href="mailto:lameventanas@gmail.com" target="_blank">lameventanas@gmail.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I've always wondered if early media with video would allow to see who<br>
is calling before answering.<br>
Is it possible? Is anybody doing this?<br>
<div class="HOEnZb"><div class="h5"><br>
On Wed, Feb 3, 2016 at 11:56 PM, Olivier <<a href="mailto:oza.4h07@gmail.com">oza.4h07@gmail.com</a>> wrote:<br>
> Hello,<br>
><br>
> Could you help me to summarize what is SIP Early Media useful for ?<br>
><br>
> I was thinking of:<br>
> - Passing error messages to caller,<br>
> - Custom ringing tones to caller.<br>
><br>
> Did I miss something ?<br>
><br>
> Best regards<br>
><br>
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