Iñaki Baz Castillo writes:
That would be so cool... Unfortunatelly I just know a SIP phone implementing it: Twinkle.
nokia sip phones implement p-p-i/identity based privacy.
Other phones (as Linksys) when the user enables privacy during a call, just set the From Display-Name with "Anonymous" value, while the From username remains the real :(
linksys phones do also many other things that are against standards.
-- juha