Paul
Franz Edler wrote:
Dear experts,
I have a question regarding SDP in a 183 Session progress response in case of SIP-ISUP interworking (rfc3398).
rfc3398 states: ... the gateway will generate a 183 message towards the SIP node; this contains SDP to establish early media cut-through. But it is my understanding of offer/answer model that no SDP in a response (answer) is necessary to cut-through in backward direction because the SDP in INVITE (offer) already contains all information to send media to the caller.
If an SDP is necessary in a 183 message in the above mentioned case: What
should it contain?
Thanks for you help.
Franz
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