User guide

B - 2 MC55 User Guide
Audio Modes
The MC55 can be in any one of the seven different audio modes. The mode is visually indicated by the VQM icon
on the title bar.
Figure B-1 VQM Icon in Title Bar
The VQM icon indicates that the device is in speakerphone mode without Acoustic Echo Cancellation (indicated by
the gray VQM icon). The audio modes and their corresponding VQM title bar icons are:
Changing Audio Modes
Depending upon the audio mode being used, the mode can be changed by tapping the VQM icon in the title bar.
The audio mode can only be changed only while the user is on a call.
The table below lists the current audio mode and the subsequent audio mode after tapping the VQM icon.
If the audio mode is set to speakerphone and the user taps the VQM icon, the audio mode changes to handset.
Table B-1 VQM Icons
Icon Description
Speakerphone with Acoustic Echo Cancellation.
Speakerphone without Acoustic Echo Cancellation.
Handset with Acoustic Echo Cancellation (device is in handset mode only while on
a call).
Bluetooth headset while on a call (Acoustic Echo Cancellation is not enabled for
Bluetooth headsets). White icon.
Bluetooth headset while not on a call. Gray icon.
VQM icon
Table B-2 Changing Audio Modes
Audio Mode before Tapping VQM Icon Audio Mode after Tapping VQM Icon
Speakerphone Handset
Handset Speakerphone
Bluetooth headset Speakerphone