Is that your phone ringing..? If you want to change the default ring tone of Communicator then follow these steps:

Take your favourite tune and turn it into a WAV file. Copy this WAV file to c:\program files\Office communicator 2007

In  Office Communicator 2007

· Tools, options

· Select the Alerts tab

· Configure sounds

· Sounds tab

· Scroll down until you get to Office communicator 2007, incoming call

· Select your WAV file then press OK twice

Bingo.