Turning automatic gain control on or off 

1. Press Home. 

2. Select Options & Settings... 

3. Press Select or OK. 

4. Select Advanced Options... 

5. Press Select or OK. 

6. Select Automatic Gain Control... 

7. Press Select or OK. 

8. Select the device (Handset, Headset, or Speaker) for which you want to turn AGC on or off. 

9. Press Change or OK to turn AGC on or off. 10. Press Save.