Polycom 6000 - Manual (Page 49)

Microphones and Speakers
4 - 7
To make a test call in stereo:
 Select Polycom Austin Stereo from the directory, or enter
stereo.polycom.com
in the dialing field and press Call on the
remote control or keypad.
The Polycom Austin Stereo site demonstrates the stereo feature with an
entertaining and informative presentation.