Hi Varun,
As indicated in rfc3261, the ACK for 2xx is not part of the INVITE transaction,
(since pre-rfc6026 implementations will destroy the INVITE txn on
receiving/forwarding the 2xx response) as described in the statemachines in
chapter 17.
The ACK for 2xx has its own branch-value, indicat
Hi Varun,
What do you mean by the tag is changed in subsequent 2XX? It will be
different for all 2XX due to the fact of having different dialogs with
B2BUA.
As you quote forking is being handled by B2BUA, B2BUA would have been
created multiple dialogs at the time of forking and while receiv
