[Asterisk-Users] Detect a forwarded incoming call?

[Eric "ManxPower" Wieling]

Frank Liu wrote:
> Within asterisk, is it possible to detect that an incoming call is a
> direct dialing, or forwarded via another place? When a call is being
> forwarded via a 3rd party (say, SBC), will it have some indication in
> the call packet?

You mean something like as is documented in README.variables for RDNIS?