Hi, in case of an INVITE with no SDP, how should the request indicate what it 
wants? I think it should include an Accept header:

  Accept: Application/sdp

But I wonder if Content-Type is needed (I expect no since there is no body).
What about Content-Disposition header? There is no "Content-type: 
Application/sdp", so maybe "Content-Disposition: session" is required, isn't 
it?

Thanks.

PD: Why there is a simple example of an INVITE with no SDP in RFC 3725 "Best 
Current Practices for Third Party Call Control (3pcc)"??

-- 
Iñaki Baz Castillo

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