Subject: Re: [Sipping] sipping dialog package for CCBS/CCNR

From: Jonathan Rosenberg <[email-masked]>
Date: Thu, 05 Sep 2002 12:42:40 -0400

The notion of filtering is not specific to the dialog event package, and 
applies to any sip event package. There have been some proposals for a 
generic filter language which could be used in all subscriptions:

http://www.ietf.org/internet-drafts/draft-moran-sipping-filter-arch-00.txt

I don't think this is quite right, but its a step in the right 
direction. As such, this problem needs to be addressed genreally and not 
with specific changes to the dialog package.

-Jonathan R.

Poetzl, Joachim wrote:
> Hello all,
> 
> for the time being no body is defined which could be used as filter which applies to the SUBSCRIBE Request. Only default behaviour ois described.
> 
> For supplementary services like CCBS/CCNR it would be helpful  if one can filter on specific events on specific dialogs in the SUBSCRIBE Request. The filter should allow a subscriber to ask for notification for a specific dialogs and for specific events / state changes.
> 
> -- the differentiation of certain dialogs which are used for voice communication could be done by the SDP information present in the UA.
> -- the state change from confirmed to terminated is the most important information for CCBS/CCNR and this should merely be notified / be selectable. This will limit the  amount of messages and simplifies interworking 
> 
> Some similiar coments have been made on the list - have there been any changes yet?
> 
> Can we have some changes in draft-ietf-sipping-dialog-package to reflect these ideas? 
> 
> Thoughts? 
> 
> 
>>Regards
>>
>>Joachim Pötzl
>>
> 
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-- 
Jonathan D. Rosenberg, Ph.D.                72 Eagle Rock Ave.
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