1.

Is The Ack Sent To Non-2xx Final Response Is Considered To Be Part Of The Same Transaction As Invite?

Answer»

Yes, the ACK sent to non-2xx FINAL RESPONSE is considered to be part of the same transaction as INVITE. ACK request reuses the same branch ID as INVITE. Only an ACK sent in response to a 200 OK is considered a separate transaction with a unique branch ID. Also an ACK to a non-2xx final response is a hop-by-hop response, not an end-to-end response.

Yes, the ACK sent to non-2xx final response is considered to be part of the same transaction as INVITE. ACK request reuses the same branch ID as INVITE. Only an ACK sent in response to a 200 OK is considered a separate transaction with a unique branch ID. Also an ACK to a non-2xx final response is a hop-by-hop response, not an end-to-end response.


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