Bob, > Is there a way for a network monitoring agent which sees both > signalling paths of a single call > handled by a B2BUA to know that the two separate transactions belong > to the same call? Or is > this intelligence only knowable by the B2BUA which set up the call?
One simple way to do it is to add a header that places the upstream Call-ID into the downstream's messages via a unique header. e.g. BobBergazziUpstreamCall-ID: [EMAIL PROTECTED]:5678 Have your B2BUA put that into all requests within the downstream leg. And then have your processor look for the presence of that header when trying to determine if a Call-ID is unique. It doesn't handle the case where the downstream element acts as a UAC to send a request upstream. That may require some Route/Via/Contact twiddling to do reliably. Admittedly this ain't robust. :) - Rhys __________________________________ Rhys Ulerich Telecommunications Solutions Software Development Email: [EMAIL PROTECTED] Office: 512-838-1428 IBM Software Group - Austin, TX _______________________________________________ Sip-implementors mailing list [email protected] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
