[SIPForum-discussion] NO SDP from called party

[Garron, James]

Raghul,   per RFC3261 section 13.2.2.4 the UAC must generate an ACK for
each 2xx response received.  If, after acknowledging any 2xx response to
an INVITE, the UAC does not want to continue with that dialog, then the
UAC MUST terminate the dialog by sending a BYE.
 
So I would say that it is the UAC that needs to determine that NO SDP
has been provided and terminate the dialog.
 
Jim

 

________________________________

From: discussion-bounces at sipforum.org
[mailto:discussion-bounces at sipforum.org] On Behalf Of Raghul Prasanna
Sent: Tuesday, February 10, 2009 6:23 PM
To: discussion at sipforum.org
Subject: [SIPForum-discussion] NO SDP from called party

 

Hi All,

 

What will happen in the following scenario?

 

A sends invite to B with SDP

we recv 100 trying

180 ringing with no SDP (say if the UA is set to play local ringtone)

200 OK with no SDP

 

Now will A ACK the 200 ok of B and send BYE because it has not received
any SDP from B or will ACK 200 OK and the call will get established and
there will be one way audio or ACK 200 OK and wait for sometime to see
if there is any reinvite from B with SDP?

 

 PLease explain, also point out to any ietf draft or rfc if possible.

 

Thanks,
Raghul

 

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