* SIP Call
  1. NewChan         Channel SIP/60b127o722n3fm41-0921a4d8 - from
  172223d10df413693f
  2. TxReqRel        INVITE / 102 INVITE - -UNKNOWN-
  3. Rx              SIP/2.0 / 102 INVITE / 100 trying -- your call is
  important to 
  4. SchedDestroy    32000 ms
  5. TxReqRel        CANCEL / 102 CANCEL - -UNKNOWN-
  6. SchedDestroy    32000 ms
  7. Rx              SIP/2.0 / 102 CANCEL / 200 canceling
  8. Rx              SIP/2.0 / 102 INVITE / 180 RINGING
  9. CancelDestroy