Hi Dale,

Yes, I am trying to overcome the fact that many UA's do not honor record 
route when they are present.   This is a big problem for proxies 
responsible for call accounting.   I know one solution would be to go 
full B2BUA.  However, I want to remain as none-intrusive as possible 
with the headers so as not to open new cans of worms with regard to 
interoperability between legs.   All I want is to be sure that I get a 
BYE or any other means for the proxy to know that the call is still 
persisting, period.   Any ideas how this is accomplished in the real world?

Thanks for the attention!

Joegen


Dale R. Worley wrote:

>On Sat, 2006-04-01 at 12:18 +0800, Joegen E. Baclor wrote:
>  
>
>>Thanks, I totally agree with your explanation.  I think it is obvious 
>>that my real intention is to make sure that the proxy receives the BYE 
>>which brings me to the next (dirty) alternative.  Modify the Contact 
>>header in the INVITE and replace it with the proxy's address before it 
>>goes down the path.  If the proxy can cache the original Contact header 
>>and use it to route suceeding messages, would that be an allowable option?
>>    
>>
>
>What are you trying to accomplish?
>
>If the UAs obey the standard, the proxy only needs to add a Record-Route
>for itself.
>
>Are you worried about interoperating with UAs that do not obey the
>standard?
>
>Dale
>
>--- 
>interop.pingtel.com -- the public SIP phone interoperability test server
>
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