Actually, Brett gave the best answer.
The lack of response to OPTIONS should not have caused a presumption
that the dialog, or the invite dialog usage, has failed. Lacking some
other failure, the RTP should have continued to flow and the call should
have stayed up.
Once the RTP stopped flowing, for whatever reason, if the recipient of
that RTP decides that it no longer values the call and wants to end it,
then it is obligated to send a BYE.
Thanks,
Paul
Iñaki Baz Castillo wrote:
> 2010/3/19 WORLEY, DALE R (DALE) <dwor...@avaya.com>:
>> The basic answer to your question is "yes". In general, in any dialog or
>> usage, if a UA decides that it is terminated, for any reason than a message
>> from the remote UA that states that the dialog/usage is termianted, the UA
>> should send an explicit termiantion message.
>>
>> In this case, if a UA receives a 408 response to an OPTIONS and decides that
>> it must terminate the dialog, since it does not know that the remote UA
>> knows that the dialog has been terminated, it should send a BYE. Of course,
>> there is no guarantee that the remote UA will see the BYE.
>>
>> Of course, the CDRs at the two UAs will likely be different, but in the face
>> of network outages, the two UAs will not always agree on the state of the
>> dialog.
>
>
> Thanks a lot.
>
>
_______________________________________________
Sip-implementors mailing list
Sip-implementors@lists.cs.columbia.edu
https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
