Hi All,
          I am executing the SIP to Mobile call. The complete scenario is as 
below.
             SIP(UAC)                                    SWITCH                 
       MS

-------------->
INVITE with SDP(precondition not met)                               
---------------->
                                                                         PAGING
                                                                    
---------------->
                                                                         SETUP

<---------------
  183(Session Progress)
---------------->
   Prack
<---------------
   200OK(Prack)

Now Switch is waiting for UPDATE from SIP(UAC) for preconditions to be met. In 
my Case UAC is not sending the UPDATE msg.
I want to ask is there any timer for UPDATE on UAS forreceiving UPDATE so that 
it can release the call, because here the resources of SIP(UAC) are not getting 
released till 18 minutes.
18 minutes is so much long time for releasing the sip resources.
Is it right be behavior? Or resources should release after a certain time 
period(timer) when UPDATE is not received .

Thanks,
Vineet




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