asterisk users - Jan 2012 - Update callee num or name at caller display

Hi,

A calls B and B has it's phone forwarded to C. So the call rings at C.
Is there any way to inform A about that forwarding? Best way would be
to update the called name so A has "B forwarded to C" in his display.
Any chance to get this?
I tried "Set(REDIRECTING(to-name)=...)". This sends a "SIP/2.0
181
Call is being forwarded" to the calling phone, but with no information
about the new callee name.

Regards,
Gunnar

I've never done it myself yet but I think I would look after COLP
function (1.8 and above).