RE: SIPit 21: Question about offer answer

> However, the specs allow the answer to such a
non-changed 
> offer to be different from the previous answer.
> 
> What was the motivation? 

To cause 3PCC headaches if B2BUA refreshing/auditing with
re-INVITE. ;)

If I recall correctly, it was mainly to allow for recovery
and avoid
exceptions to the rfc3264 rules.


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