Appendix B Voice Quality Manager
Introduction
The Voice Quality Manager (VQM) is a software package that resides on the MC75. VQM enables a set of features
for Voice over WiFi (VoWiFi) calls, and a sub-set of those features for cellular line (GSM or CDMA) calls. The VQM
user interface is designed to be intuitive and easy to use, so complex tasks such as enabling the Acoustic Echo
Canceller (AEC) while a call is in progress are done with very little or no user intervention.

Features

The VQM software:
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Improves the voice transmission quality without using additional battery po wer.
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Turns on the AEC for VoWiFi calls automatically, without user intervention.
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Prioritizes the outgoing audio IP packets.
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Provides user-selectable audio modes (speakerphone and handset) with a singl e tap of the VQM icon. A
VQM icon in the title bar of the device indicates the audio mode currently in use.
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NDIS 5.1 compliant.

Enabling VQM

To enable VQM:
1. Tap Start > Programs > File Explorer.
2. Navigate to the Windows folder.
3. Locate the file VQMAudioNotify.
4. Tap the filename to enable VQM.