[Sip-implementors] after 183 or 180 have a CANCEL

[patroclo Perez]

Hi,
  Why after send message 183 or 180 I have a CANCEL the other side?
  look this.
   
  SIPCallTrace: (08/02/07 16:02:44) 8/2/7 16:2:44 Recv chid:1 
ip:200.107.63.2:5061
 SIP INVITE
  SIPCallTrace: (08/02/07 16:02:44) 8/2/7 16:2:44 Send chid:1 
ip:200.107.63.2:5061
 SIP response 100
  SIPCallTrace: (08/02/07 16:02:44) 8/2/7 16:2:44 Send chid:1 
ip:200.107.63.2:5061
 SIP response 183
  SIPCallTrace: (08/02/07 16:02:44) 8/2/7 16:2:44 Recv chid:1 
ip:172.17.1.121:5060
 SIP method CANCEL(8)
   
   
  The cancel reason is this:
  Reason: Q.850;cause=47;text="resource unavailable"

                
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