Hello All,
I am troubleshooting an issue here where the following flow of events is 
leading to hung call licenses in CVP. Can anyone point out anything out of 
specs here? Do you think stpes F7 and F8 constitute a valid transaction to 
extend REFER subscription and convey final status of the REFEREED Event? As per 
my reading of RFC 3515 that seems to be valid.

                            GW                                                  
 CVP F1                                               <--------------REFERF2    
                     ----------->202AcceptedF3                        
----------->Notify (Trying)F4                                             
<------------200Ok (Notify)F5                      
----------->Notify(Ringing)F6                                          
<------------200Ok(Notify)                           Approx.  after 58 seconds 
REFER subscription is extended as expected coz of expires timer of 60 seconds 
in the initial REFER.
 F7                                        <-----------Subscribe(Event: 
REFER)F8                   -------------> 503 Service Unavailable.           
Afterthis multiple update messages every 2 hour and then BYE after 11 hours.F9  
                                           <---------------BYEF10               
 -------------->200 OK. (BYE)

Thanks,Ashish Rawat
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