RFC3261 - 6.1, pargraph 4:
"If an offered media stream is
listed as sendrecv (or if there is no direction attribute at the
media or session level, in which case the stream is sendrecv by
default), the corresponding stream in the answer MAY be marked as
sendonly, recvonly, sendrecv, or inactive."
My question is that: If the SDP offer contains the a=sendrecv, can the
SDP answer omit the a= line to represent the default value, i.e:
Offer (a=sendrecv) ---->
<--- Answer(no a=sendrecv line )
Thanks,
Alex
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