"Ivar" <[EMAIL PROTECTED]> asks

> Hi,
>
> In RFC 3261
>
> Contact                1xx           -   -   -   o   -   -
> Contact                2xx           -   -   -   m   o   o
>
> For there i guess it's optional, but no the case:
>
> UA1 -> UA2
> UA2 sends ringing without Contact
> UA1 created early dialog, but wants to terminate it, it must send BYE
> ...... no contact header what should do ?

If UA1's only received provisional responses surely it wants to send a
_CANCEL_ to terminate the dialog?

frank

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