Motorola MC75 - Worldwide Enterprise Digital Assistant User's Guide Page 213

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Voice Quality Manager C - 3
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.
When using a Bluetooth headset with BTExplorer, enable the headset profile and ensure that the device is
connectable. Pressing the headset button pairs the headset back to the MC75A. A second click of the headset
button sends audio to the Bluetooth headset.
If the MC75A and the Bluetooth headset are un-paired, there is no way to go back to the Bluetooth headset using
the VQM icon. The only way to reconnect the Bluetooth headset to the device is by using the BTExplorer
application.
If the user taps the VQM icon when a wired headset is connected to the MC75A, the audio mode does not change.
The audio continues to get routed to the wired headset.
If the user taps the VQM icon while not on a call there is not change to the audio mode.
To view the VQM versions numbers tap Start > File Manager. Navigate to the Windows folder and search for
VQMAudioNotify.exe file.
A dialog box displays listing the versions numbers.
Figure C-2
VQM Audio Control Dialog Box
Voice Packet Prioritization
IP soft phones transmit voice packets in the same manner as any other application that sends data over the
network. On a network with different types of traffic, voice packets are given the same priority as any other traffic,
and therefore may be subject to delays.
WiFi Multi-media (WMM) is a solution to this problem. WMM is a specification that supports prioritizing traffic, and
“higher-priority” packets can be given preferential treatment.
To make use of WMM, the devices that generate traffic must mark their packets as high or normal priority in a field
in the IP packet called Differentiated Services Code-Point (DSCP). The wireless infrastructure, which must be
configured to support WMM, gives a higher priority to packets that have been marked as high priority through
DSCP marking by the devices that generate traffic.
Table C-2
Changing Audio Modes
Audio Mode before Tapping VQM Icon Audio Mode after Tapping VQM Icon
Speakerphone Handset
Handset Speakerphone
Wired headset Wired headset
Bluetooth headset Reverts back to the last profile used before the
Bluetooth connection.
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