On 2/28/15 3:36 PM, brez wrote:
Hello,
Is it possible to establish a session (INVITE) with SDP constructed in
such a way so that neither party initiates a media session, nor
allocates resources (ports) for a non-existent media session?
In principle you can send an initial offer with SDP that has no m-lines.
AFAIK that is valid. But I have recently had discussions with someone
about this, and about a UAS that wants to return 488 for this case. I
*think* that in *practice* you will find that many UASs will reject such
an offer one way or another.
Thanks,
Paul
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