sip - special 487 request terminated scenarios -


when sip isup call on table. mapping ( origination side sip , termination side isup) of that; normal call scenario , after acm , alerting isup side ( 18x on sip side) isup side sends release after (9 seconds) starting of ringing cause code 16 normal call clearing. sip server replied/mapped originator(calling party) 487 request terminated. questions : 1- on isup side: when call not answered yet ( alerting state) , possible isup rel message rel cause 16 ( normal call clearing) called party ( termination side)? 2- if rel message rel cause 16 isup side , on sip side message mapped ? because in specs never seen on sip isup mapping , 16 normal call clearing ...

thanks in advance fatih


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