Disconnect your FR-33.2 and make calls from your computer and see if you still hear the echo. If so, you may wish to contact your Internet Service Provider regarding the quality of your connection.
Additionally, in a Windows environment, you can try turning on the Mute Microphone Volume setting.
- Open the Volume Control panel from Program Files > Accessories > Entertainment > Volume Control.
- Go to Options > Content menu and select FR-33.2 as the mixer device.
- Check the Microphone box.
- Turn on the Mute option in the Microphone volume setting.