I have searched this list for an answer to the 302 response handling problem but found no real solution. It seems no one actually has an aswer for this so I studied the RFC 3261 and found the following statement:

In my mind that statement is completely off the wall, it is not the requesting client that should be responsible for establishing the forwarded call, it never is in the rest of the telecom industry so why should it be the case for SIP? Instead, this should ofcourse be the responsibility of the forwarding client or the service provider on behalf of the forwarding client. But as the RFC is not crafted that way I need to find a way to handle call forwarding in a proper way so that the cost for the forwarded call ends up on the forwarding clients bill. As call forwarding is a basic requirement in any phone network there must be some one reading this list who has solved this issue that can share there insight.