Hello I’m trying to implement call forwarding unconditional redirect to a PSTN destination. Call flow: PSTN-->SIP-CallFW-->PSTN On my PSTN side I have a cisco AS5300. We succesfuly forwarded to a PSTN destination. We have changed calling party (for billing purposes) and called party to complete call forwarding. In other words we generate a new call attempt. Everything looks ok but if calling party (PSTN originating side) finishes the call before called party answers (PSTN destination side), cisco GW receives a CANCEL message and it answers with message 481 Call leg/Transaction does not exist to the Proxy. The call still ringing and goes to voice mail on PSTN destination side that means cisco GW never receives a BYE regarding to the original INVITE message. Can you give me a hint on how to handle this issue ? Thanks Captured attached Ariadne L. Ramos Solís Depto. Ingeniería Aprovisionamiento y Señalización VoIP Galaxy Communications Corp. Tel. 2000117 e-mail aramos(a)clarocom.com