Re: [rtcweb] Forking & Early Media - Was Re: Minimal SDP negotiation mechanism

"Olle E. Johansson" <oej@edvina.net> Tue, 20 September 2011 21:17 UTC

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From: "Olle E. Johansson" <oej@edvina.net>
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To: Cullen Jennings <fluffy@cisco.com>
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Subject: Re: [rtcweb] Forking & Early Media - Was Re: Minimal SDP negotiation mechanism
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20 sep 2011 kl. 22:39 skrev Cullen Jennings:

>>> 
>>> Simplification is good - just make sure that it is possible to gateway to a SIP call to 1-800-go-fedex. A simplification that broke that would, in my personal opinion, would not be acceptable. (and I think that early media is a bit more than just a billing artifact but that's a longer story). You agree?
>> Absolutely, but if the call is in UP state on the rtcweb side as soon as the PSTN/SIP gateway receives early media we will have no issue with sending DTMF in early media, which is what you are trying to trick me with :-)
> 
> really I was not going to mention DTMF :-) 

Background to the fedex/DTMF hints:

Fedex for some reason got a deal not only to send early media from a commercial company, but also have an IVR server and request DTMF while still not answering the call. This forced a code change in quite a lot of SIP servers... ;-)

/O