Dale,

Some problems with this:

- it only works for B2BUAs that work this way. Currently there are none. 
And of course there can be several, including ones that have no 
particular desire to make this feature work.

- removing the callid is considered by some to be required to hide node 
names (which are often part of the callid). If that it thought to be 
important then copying the callid to another field will defeat the intent.

        Paul

[EMAIL PROTECTED] wrote:
> In the current scheme, the natural approach to this situation would
> be:
> 
> 
>    Agent                  B2BUA                     Monitor
>        INVITE call-ID 1            INVITE call-ID 2
>                                    id="call-ID 1"
>        ---------------->           ---------------->
>           186                         186
>        <----------------           <----------------
> 
>       SUBSCRIBE call-ID 3         SUBSCRIBE call-ID 4
>      Event:...target-call-ID 1  Event:...target-call-ID 1
>        ---------------->           ---------------->
> 
> 
> At the monitor, the original call would be indexed by the 'id'
> parameter, which is "call-ID 1".  This allows matching with the
> subsequent SUBSCRIBE.
> 
> Dale
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> 
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