Question: In the context of Successful AS originated session establishments in IMS, what happens when a SIP_180 response is received, followed by a SIP_200_OK response for the same session?
Option 1: Both SC.SuccSession.180 and SC.SuccSession.200 are incremented.
Option 2: Only SC.SuccSession.180 is incremented; SC.SuccSession.200 is ignored if SIP_180 has been received.
Option 3: The session is not counted in either SC.SuccSession.180 or SC.SuccSession.200 due to the sequential responses.
Option 4: Only SC.SuccSession.200 is incremented, as it signifies the final successful establishment regardless of prior SIP_180.
Explanation: According to the measurement rules for Successful AS originated session establishments, if a SIP_180 response is received and then a SIP_200_OK response, only SC.SuccSession.180 is incremented. The SC.SuccSession.200 counter is incremented only if SIP_180 hasn't been received for that session, ensuring accurate measurement of successful session establishments based on the first indicative response message.