[SIPForum-discussion] Which should be the correct behaviour?

[prasanna c]

Both are not correct scenario.  Sip phone MUST not send CANCEL without receiving any Provisional response response. If CANCEL is sent after receiving any provisional response, then Scenario 1 is correct.


From: androjoker at hotmail.comTo: discussion at sipforum.orgDate: Fri, 28 Mar 2008 11:10:21 +0000Subject: [SIPForum-discussion] Which should be the correct behaviour?



Hello, does anybody know which should be the correct phone behaviour in these two scenarios?
-          Scenario 1:
SIP phone sends an INVITE (D1)
SIP phone sends a CANCEL (C1)
SIP phone receives C1 200 OK 
SIP phone receives D1 200 OK 
 
-          Scenario 2:
SIP phone sends an INVITE (D1)
SIP phone sends a CANCEL (C1)
SIP phone DOES NOT receive C1 200 OK 
SIP phone receives D1 200 OK

Thanks,

Andrea


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