Polycom RMX 1500 Administrator's Manual page 52

Polycom RMX 1500/2000/4000 Getting Started Guide
1-26
13 Click the Audio Settings tab.
The New Profile - Audio Settings dialog box opens.
14 Define the video display mode and layout using the following
parameters:
Table 1-5 Profile Properties - Audio Settings
Field/Option
Echo
Suppression
Description
When enabled (default), an algorithm is used to search
for and detect echo outside the normal range of human
speech (such as echo) and automatically mute them
when detected.