How to change call waiting tone

Version 1
    This document was generated from CDN thread

    Created by: Parisa Tashakori on 03-06-2011 12:08:19 PM
      When Play:URI with another URL is posted to a phone with CiscoIpPhoneExceute, if there is an active call in process, a call waiting beep will be generated to inform person. is it possible to change call waiting beep programatically?