Differentiate ring tones based on who they called Merged

I am logged into a queue for helpdesk.. and doing so, I would like to step away to do other work close to my desk but know that when my phone is ringing that calls for the helpdesk are ringing in a fashion that I can Identify it as a helpdesk call. Or calls coming to my extension or line directly being dialed to reach me only, I can identify those calls separately as well because each number should ring with a different ring tone that I set up.

Could you add this to the console, as it was a known feature in both 3Com and in Cisco phone systems of which I am used to. Others at Trillium have asked for this feature, in RC but it doesn't exist as of yet.