[cisco-voip] Can i make the caller hear different tone when the called person has call waiting enabled

[Anthony Kouloglou]

Hi all,
is there a way of making the caller hear different tone when the called 
person has call waiting enabled?
It is really annoying to call someone and not knowing whether he/she is:

-there and not answering the phone
-not there
-there but talking to an other line!!


Any PBX can do this i think!! (At least Alcatel which i am familiar of)

Cheers,
Anthony